1.0.1 This Code is formulated with a view to enhance building construction quality management, unify the acceptance inspection of construction quality of ventilation and air conditioning works, and guarantee the construction quality.

1.0.2 This Code applies to the acceptance of construction quality of ventilation and air conditioning works in building engineering.

1.0.3 This Code shall be used in connection with the current national standard GB 50300–2001 “Unified standard for acceptance of construction quality of building works”.

1.0.4 The requirements for construction quality as set forth in the engineering technical documents and contract documents adopted in the construction of ventilation and air conditioning works shall not be lower than those specified in this Code.

1.0.5 The acceptance inspection of construction quality of ventilation and air conditioning works shall comply with the state’s current relevant standards in addition to this Code.

2 Glossary

2.0.1 air duct

Made of metal or nonmetal sheets or other material, used as piping for ventilation

2.0.2 air channel

Formed by laying with concrete, bricks or other building material, used as piping for ventilation

2.0.3 ventilation works

A general term for air blast, air draft, dust removal, pneumatic transmission and fume prevention and exhausting works

2.0.4 air conditioning works

A general term for air conditioning, air purification and clean room air conditioning

2.0.5 duct fitting

Elbow, Tee, cross joint, various reducers and shaped tubes, guide vane and flange in the air duct system

2.0.6 duct accessory

Various ventilating dampers, valves, exhaust hoods, air caps, inspection port and measuring hole in the ventilation and air conditioning duct system

2.0.7 seam

Structure formed by bending the edge of metal sheets into a certain shape for interconnection and fixing

2.0.8 air leakage rate

In the air duct system, the volume of air inleakage or outleakage out through the duct and its connection at a certain static pressure in unit time

2.0.9 air system permissible leakage rate

The maximum permissible air leakage rate in average unit area and unit time specified according to the classification of the air system

2.0.10 air system leakage rate

The ratio of air inleakage or outleakage to the rated air rate at the working pressure for air conditioning equipment and dust eliminator etc

2.0.11 air cleaning system

Air conditioning and purification system for room air purification

2.0.12 air leak check with lighting

A method for checking light transmission of the seams, joints, flanges and other connections of the air duct system with strong light source to identify the location and quantity of leaking spots such as void and aperture

2.0.13 packaged refrigerating unit

An integrated refrigerating unit consisting of refrigerating machine, condenser, evaporator and system accessory components assembled on the same skid.

2.0.14 assembling refrigerating unit

A refrigerating unit with refrigerating machine, condenser, evaporator and system accessory components installed in a partially integrated and partially separated way.

2.0.15 design working pressure

The maximum design working pressure at the air duct header of the system ducting

2.0.16 air cleanliness class

Rating standard per unit volume of air in clean space by classifying into greater than or equal to the maximum concentration limit of particles in the considered particle size

2.0.17 corner pieces

A perpendicular type special constructional element for perpendicular connection of steel sheet flanged air duct

2.0.18 fan filter (module) unit

Unit type blower set for cleaning the space consisting of fan box and high efficiency filter

2.0.19 as-built

The state in which the facilities in the clean room have been built up, all power supplies have been connected and put into operation, but there is no production equipment, materials or personnel at site

2.0.20 at-rest

The state in which the facilities in the clean room have been built up, the production equipment has been installed and is running in a way approved by the Client and the supplier but with no production personnel.

2.0.21 operational

The state in which the facilities in the clean room are running in the specified way with the specified number of personnel at site, and the production equipment is running in a way approved by the Client and the supplier

2.0.22 nonmetallic duct

Air duct made of rigid PVC, organic glass reinforced plastics, inorganic glass reinforced plastics and other nonmetallic inorganic material

2.0.23 foil-insulant composite duct

Air duct made of composite insulant sheet with noncombustible covering

2.0.24 refractory duct

Air duct made of noncombustible or fire resistant material to meet certain fire resistance limit

3 Basic Provisions

3.0.1 In addition to compliance with the provisions of this code, the acceptance for construction quality of ventilation and air conditioning works shall be carried out in accordance with the approved design drawings, contractual stipulations and provisions of relevant technical standards. Revision on construction drawings must be accompanied by design change order of the design institute or technical verification certificate.

3.0.2 The construction enterprise contracting for the ventilation and air conditioning works shall have the qualification class for corresponding construction contracting and respective quality management system.

3.0.3 Where the construction enterprise undertakes the detailed engineering of construction drawings as well as construction for ventilation and air conditioning works, it must have the respective design qualification and quality management system and must obtain the written consent or the approval with signature of the original design institute.

3.0.4 The quality management at the construction site of ventilation and air conditioning works shall comply with the provisions in 3.0.1 of GB 50300-2001 “Unified standard for acceptance of construction quality of building works”.

3.0.5 The main raw materials, finished products, semi-finished products and equipment used for ventilation and air conditioning works must be subject to acceptance inspection for mobilization to the site. Such acceptance shall be subject to the approval of the supervision engineer, and respective quality records shall be prepared.

3.0.6 During construction of ventilation and air conditioning works, each itemized construction step shall be taken as the inspection point for construction step turn over, and respective quality records shall be prepared.

3.0.7 Where the design document is found to have errors during construction of ventilation and air conditioning works, revision comments or correction recommendations shall be raised in a timely fashion, and written documents shall be developed and filed in this regard.

3.0.8 Where ventilation and air conditioning works are constructed as a portioned work of the building works, the sub-portion and itemized works shall be classified in accordance with Table 3.0.8. Where ventilation and air conditioning works are accepted separately as a unit work, the sub-portion shall be upgraded to portion and classification of itemized works shall be the same as the above.

Table 3.0.8 Classification of sub-portions of ventilation and air conditioning portioned works

Sub-portion works	Itemized works
Air blowing and exhausting system	Air duct and fitting fabrication Component fabrication Air duct system installation Air duct and equipment anti-corrosion Blower installation System commissioning	Ventilation equipment installation, silencer equipment fabrication and installation
Fume prevention and exhausting system		Fume draught, normal close positive pressure draught and equipment installation
Dust removal system		Dust eliminator and blow down equipment installation
Air conditioning system		Air conditioning equipment installation, silencer equipment fabrication and installation, air duct and equipment insulation
Cleaning air conditioning system		Air conditioning equipment installation, silencer equipment fabrication and installation, air duct and equipment insulation, high performance filter installation, cleaning equipment installation
Refrigerating system	Refrigerating machine set installation, refrigerant piping and fittings installation, refrigeration accessory equipment installation, piping and equipment anti-corrosion and insulation, system commissioning
Air conditioning water system	Cold and hot water piping system installation, cooling water piping system installation, condensate water piping system installation, valves and components installation, cooling tower installation, water pump and accessory equipment installation, piping and equipment anti-corrosion and insulation, system commissioning

3.0.9 Construction of ventilation and air conditioning works shall be carried out according to specified procedures and in coordination with civil and other disciplines. After their construction completion, civil works related to ventilation and air conditioning works shall be subject to the joint inspection of the Client or the general contractor, the supervision organization, the design institute and the construction contractor. The joint inspection should be organized by the Client, the supervision organization or the general contractor.

3.0.10 The acceptance for construction quality of itemized works of ventilation and air conditioning works shall be in compliance with the specific provisions of this code for respective items. The various items of the sub-portion may be subject to acceptance inspection all at one time or several times depending on the actual situation of construction.

3.0.11 The concealed works in ventilation and air conditioning works must be subject to the supervisor’s acceptance inspection and verification certification prior to concealment.

3.0.12 Welders conducting the pipe welding construction in ventilation and air conditioning works must hold operation qualification certificate and welder test certificate for respective category of piping welding.

3.0.13 The system commissioning after completion of ventilation and air conditioning works shall be carried out with joint participation of the Client and the supervision organization. The construction enterprise shall have professional testing personnel as well as test instruments in compliance with relative standards.

3.0.14 The guarantee period for construction quality of ventilation and air conditioning works shall be two heating and cold supplying periods since the date of successful final acceptance. For any construction quality problem arising during the guarantee period, the construction enterprise shall take the responsibility of repair, and the party responsible shall assume the economic accountability.

3.0.15 The cleanliness level of the clean room (area) of the cleaning air conditioning system shall meet the design requirement. The measuring of cleanliness level shall comply with point B.4 in Appendix B to this Code. See Table B.4.6-1 in Appendix B to this Code for provisions on the cleanliness rating and the maximum concentration limit (C₀) of suspended particles in the air.

3.0.16 The acceptable quality of batch acceptance of itemized works shall comply with the following:

1 Having available the construction contractor’s acceptance inspection records for the acceptable quality of respective items;

2 The quality sample test for main control items shall be deemed acceptable to the extent of 100%;

3 Unless specifically required, the quality sample test for ordinary items shall have an acceptable ratio by counts no less than 80%, without any serious defect.

4 Duct Fabrication

4.1 General Requirement

4.1.1 This chapter will be applicable to inspection and acceptance of air duct and air channel fabrication which is made of metal, non metal, foil insulant composite material in ventilation and air conditioning works.

4.1.2 Quality acceptance for air duct fabrication, as per duct materials, system categories and service area, will include inspection over duct material, specification, strength, tightness and visual quality of finish product and etc.

4.1.3 Quality acceptance for air duct will follow design DWG and this Code. Any outside purchased air duct shall have corresponding evident document of Product Quality Certificate or test report for strength test and tightness test. And only qualified products will be allowed to incorporate into the works.

4.1.4 Specification acceptance for air duct shall be based on the outside diameter or outside perimeter length. For air channel, the acceptance criteria for its specification will be based on inside diameter or inside perimeter length. It is preferred to follow Table 4.1.4-1 and Table 4.1.4-2 on air duct specification. Circle air duct shall use Basic Series. Non regular oval air duct shall take reference for rectangular air duct and the length of longer radius plan and length of short radius shall govern.

Table 4.1.4-1 Circle air duct specification (mm)

Air duct diameter D
Basic Series	Auxiliary Series	Basic Series	Auxiliary Series
100	80	250	240
100	90	280	260
120	110	320	300
140	130	360	340
160	150	400	380
180	170	450	420
200	190	500	480
220	210	560	530
630	600	1250	1180
700	670	1400	1320
800	750	1600	1500
900	850	1800	1700
1000	950	2000	1900
1120	1060

Table 4.1.4-2 Rectangular air duct specification (mm)

Length of air duct edge
120	320	800	2000	4000
160	400	1000	2500	-
200	500	1250	3000	-
250	630	1600	3500	-

4.1.5 Air duct system will be divided into three categories in term of working pressure and the dividing criteria for different categories shall be in compliance with the requirements in Table 4.1.5.

System Category	Working Pressure P (Pa)	Sealing Requirement
Low Pressure System	P≤500	Seam joint and duct connection shall be tight.
Medium Pressure System	500<P≤1500	Additional sealing measures shall be taken for Seam joint and duct connection.
High Pressure System	P>1500	Sealing measures shall be taken for all assembly joints and duct connection.

4.1.6 For galvanized steel plate and various protective foil composite steel plate, the duct shall adopt seam type or rivet type connection and connection by welding will not be allowed because welding can impact the corrosion resistance performance of the protective layer.

4.1.7 Air duct sealing shall adopt the sealing method by using plate material as a major sealing method. Sealant filling and other sealing method can be applied. Performance character of the sealant shall suitable in the application environment. It is preferred to set the sealing surface on the pressurized profile.

4.2 Main Control Item

4.2.1 For metal air duct, its material, specification, performance character and thickness gauge shall meet the design requirement and current national product standard. When design dose not specify the requirement, the Code will govern. Thickness gauge of steel plate or galvanized steel plate shall not be less than what’s shown in Table 4.2.1-1. Thickness gauge of stainless steel plate shall not be less than what’s shown in Table 4.2.1-2. Thickness gauge of aluminum plate shall not be less than what’s shown in Table 4.2.1-3.

Table 4.2.1-1 Plate material thickness gauge of steel air duct(mm)

Category Air duct diameter D or edge length b	Circle air duct	Rectangular air duct		Air duct of dust removal system
Category Air duct diameter D or edge length b	Circle air duct	Low and medium pressure system	High pressure system	Air duct of dust removal system
D(b) ≤320	0.5	0.5	0.75	1.5
320<D(b) ≤450	0.6	0.6	0.75	1.5
450D<D(b) ≤630	0.75	0.75	0.75	2.0
630< D(b) ≤1000	0.75	1.0	1.0	2.0
1000< D(b) ≤1250	1.0	1.0	1.0	2.0
1250< D(b) ≤2000	1.2	1.0	1.2	As per design
2000< D(b) ≤4000	As per design	1.2	As per design	As per design
Note:1) The steel plate thickness gauge for spiral air duct could be reduced by 10% to 15%. 2) The steel plate thickness gauge for smoke exhaust system air duct could be taken as high pressure system. 3) The steel plate thickness gauge for special dust removal system air duct shall meet design requirement. 4) This Table is not applicable to the air duct buried in underground air defense system or fire resistance partition wall.

Table 4.2.1-2 Plate material thickness gauge for stainless steel air duct in high, medium and low pressure system (mm)

Air duct diameter or length of longer edge b	Stainless steel plate thickness gauge
b≤500	0.5
500<b≤1120	0.75
1120<b≤2000	1.0
2000<b≤4000	1.2

Table 4.2.1-3 Plate material thickness gauge for aluminum air duct in medium and low pressure system (mm)

Air duct diameter or length of longer edge b	Aluminum plate thickness gauge
b≤320	1.0
320<b≤630	1.5
630<b≤2000	2.0
2000<b≤4000	As per design

Inspection Quantity: as per various materials and air duct fabrication patches, 10% sampling and not less than 5 pieces will be inspected.

Inspection method: check material quality certificate document and performance character test report, physical measure by tape by tape and observation inspection.

4.2.2 For non metal air duct, its material, specification, performance character and thickness gauge shall meet the design requirement and current national product standard. When design dose not specify the requirement, the Code will govern. Thickness gauge of HPVC plate shall not be less than what’s shown in Table 4.2.2-1 or Table 4.2.2-2. Thickness gauge of organic glass fiber reinforced plastic plate shall not be less than what’s shown in Table 4.2.2-3. Thickness gauge of inorganic glass fiber reinforced plastic plate shall not be less than what’s shown in Table 4.2.2-4. accordingly the layers of fiber glass texture shall not be less than what’s shown in Table 4.2.2-5 and no halogen condensate or severe frosting will be allowed.

Thickness gauge for non metallic air duct in high pressure system shall follow the design requirement.

Table 4.2.2-1 Plate material thickness gauge for HPVC circle air duct in medium and low pressure system (mm)

Air duct diameter	Plate thickness gauge
b≤320	3.0
320<b≤630	4.0
630<b≤1000	5.0
1000<b≤2000	6.0

Table 4.2.2-2 Plate material thickness gauge for HPVC rectangular air duct in medium and low pressure system (mm)

Air duct longer edge b	Plate thickness gauge
b≤320	3.0
320<b≤500	4.0
500<b≤800	5.0
800<b≤1250	6.0
1250<b≤2000	8.0

Table 4.2.2-3 Plate material thickness gauge for organic fiber reinforced plastic air duct in medium and low pressure system (mm)

Diameter D of Circle air duct or length of longer edge b of rectangular air duct	Wall thickness gauge
D(b)≤200	2.5
200< D(b)≤400	3.2
400< D(b)≤630	4.0
630< D(b)≤1000	4.8
1000< D(b)≤2000	6.2

Table 4.2.2-4 Plate material thickness gauge for inorganic fiber reinforced plastic air duct in medium and low pressure system (mm)

Diameter D of Circle air duct or length of longer edge b of rectangular air duct	Wall thickness gauge
D(b)≤300	2.5-3.5
300< D(b)≤500	3.5-4.5
500< D(b)≤1000	4.5-5.5
1000< D(b)≤1500	5.5-6.5
1500< D(b)≤2000	6.5-7.5
D(b)>2000	7.5-8.5

Table 4.2.2-5 Fiber glass texture thickness and layers for inorganic fiber reinforced plastic air duct in medium and lower pressure system(mm)

Diameter D of Circle air duct or length of longer edge b of rectangular air duct	Fiber glass texture thickness for ducting segment		Fiber glass texture thickness for ducting flange
	0.3	0.4	0.3	0.4
	Fiber glass texture layers
D(b)≤300	5	4	8	7
300< D(b)≤500	7	5	10	8
500< D(b)≤1000	8	6	13	9
1000< D(b)≤1500	9	7	14	10
1500< D(b)≤2000	12	8	16	14
D(b)>2000	14	9	20	16

Inspection Quantity: as per various materials and air duct fabrication patches, 10% sampling and not less than 5 pieces will be inspected.

Inspection method: check material quality certificate document and performance character test report, physical measure by tape and observation inspection.

4.2.3 For fire resistant air ducting system, duct segment, frame, fixing material and sealing gasket must be of non combustion material and fire resistance degree shall meet design requirement.

Inspection Quantity: as per various materials and air duct fabrication patches, 10% sampling and not less than 5 pieces will be inspected.

Inspection method: check material quality certificate document and performance character test report, physical measure by tape , observation inspection and burning test.

4.2.4 The foil for composite plate must be of non combustion material. The internal thermal insulation material for composite plate shall be of non combustion or non flammable material Grade B1 and not harmful to human health.

Inspection Quantity: as per various materials and air duct fabrication patches, 10% sampling and not less than 5 pieces will be inspected.

Inspection method: check material quality certificate document and performance character test report, physical measure by tape, observation inspection and burning test.

4.2.5 Air duct shall be undergone process inspection or verifying and strength and tightness shall meet design requirement or the following requirements:

1. For air duct strength, it shall be capable of working under 1.5 times as working pressure and no crack in joints;

2. Permissible leakage rate for rectangular air duct shall meet the following specification:

Low pressure air duct system Q_L≤0.1056P^0.65

Medium pressure air duct system Q_M≤0.0352P^0.65

High pressure air duct system Q_H≤0.0117P^0.65

Above Q_L Q_M Q_H-------permissible leakage rate within a unit time in a unit area in air ducting system under corresponding working pressure [m³/(h.m²)]

P------working pressure of air ducting system (Pa)

3. For medium and low pressure circle metal air duct, foil insulant composite air duct and non flange connected non metallic air duct, their permissible leakage rate shall be 50% of that for rectangular air duct.

4. Permissible leakage rate for air channel made by brick and concrete shall not be greater than 1.5 times as that for rectangular low pressure air duct.

5. Smoke exhaust system, dust removal system and low temperature air supply system shall follow the specification for medium and low pressure air duct system for permissible leakage rate. Cleaning air conditioning system ranging from Class 1 towards Class 5 shall follow the specification for high pressure air duct system for permissible leakage rate.

Inspection Quantity: as per various air duct system categories and materials, sampling test and not less than 3 pieces and 15m² will be performed.

Inspection method: check material quality certificate document and test report, air duct strength test and leakage rate test (for details, see Exhibit A to this Code.)

4.2.6 Metal air duct connection shall meet the following requirement:

1. Seam of plate material joint shall be staggered and cross type joint will not be allowed.

2. Flange material specification for metal air duct shall not be less than what’s shown in Table 4.2.6-1 or Table 4.2.6-2. For air duct flange in medium and low pressure system, the pitch between bolt holes or rivet holes shall not be greater than 150mm, in high pressure system, the pitch shall not be greater than 100mm. Bolt holes shall be provided at four corners of flange for rectangular air duct.

If reinforcing method is to be used for the sake of air duct flange strength, the application condition for flange material could be adjusted flexibly.

For non flanged air duct, the height of light gauged steel flange shall follow the requirement for metal flanged air duct.

Table 4.2.6-1 Metal circle air duct flange and bolt specification (mm)

Air Duct Diameter D	Flange Material Specification		Bolt Specification
Air Duct Diameter D	Steel Strap	Steel Angle	Bolt Specification
D≤140	20*4	-	M6
140<D≤280	25*4	-
280<D≤630	-	25*3
630<D≤1250	-	30*4	M8
1250<D≤2000	-	40*4	M8

Table 4.2.6-2 Metal rectangular air duct flange and bolt specification (mm)

air duct longer edge length b	Flange Material Specification (Steel Angle)	Bolt Specification
b≤630	25*3	M6
630<b≤1500	30*3	M8
1500<b≤2500	40*4	M8
2500<b≤4000	50*5	M10

Inspection Quantity: as per fabrication patches, 5% sampling test and not less than 5 pieces shall be performed.

Inspection Method: physical measure by tape and observation inspection.

4.2.7 Non metallic (HPVC, organic fiber reinforced plastic and inorganic fiver reinforced plastic) air duct connection shall also meet the following requirements:

1. Flange specification shall meet the requirements in Table 4.2.7-1,4.2.7-2 and Table 4.2.7-3. The pitch between bolt holes shall not be greater than 120mm. Bolt holes shall be provided at four corners of flange for rectangular air duct.

Table 4.2.7-1 HPVC circle air duct flange specification (mm)

Air duct diameter D	Material specification( width *thickness)	Connection bolt	Air duct diameter D	Material specification( width *thickness)	Connection bolt
D≤180	35*6	M6	800<D≤1400	45*12	M10
180<D≤400	35*8	M8	1400<D≤1600	50*15
400<D≤500	35*10		1600<D≤2000	60*15
500<D≤800	40*10		D>2000	As per design

Table 4.2.7-2 HPVC rectangular air duct flange specification (mm)

air duct edge length b	Material specification (width *thickness)	Connection bolt	Air duct diameter D	Material specification (width *thickness)	Connection bolt
b≤160	35*6	M6	800<b≤1250	45*12	M10
160<b≤400	35*8	M8	1250<b≤1600	50*15
400<b≤500	35*10	M8	1600<b≤2000	60*15
500<b≤800	40*10	M10	b>2000	As per design

Table 4.2.7-3 organic/inorganic fiber reinforced plastic air duct flange specification (mm)

Air duct diameter D or edge length b	Material specification (width*thickness)	Connection bolt
D(b) ≤400	30*4	M8
400<D(b) ≤1000	40*6	M8
1000<D(b) ≤2000	50*8	M10

2. For sleeve pipe connection, the wall thickness of sleeve pipe shall not be less than air duct plate thickness gauge.

Inspection Quantity: as per fabrication patches, 5% sampling test and not less than 5 pieces shall be performed.

Inspection Method: physical measure by tape and observation inspection.

4.2.8 For flanged foil insulant composite air duct, flange shall be connected to duct plate firmly and thermal insulant shall not be exposed. Any connection method that will reduce plate strength and thermal insulation performance will not be allowed.

Inspection Quantity: as per fabrication patches, 5% sampling test and not less than 5 pieces shall be performed.

Inspection Method: physical measure by tape and observation inspection.

4.2.9 The deformed joint in brick and concrete air channel shall meet design requirement and no water leakage and air leakage will be allowed.

Inspection Quantity:100 percent

Inspection Method: observation inspection.

4.2.10 Reinforcement for metal air duct shall meet the following requirements:

1. Reinforcement measure shall be taken for the circle air duct (with exception of spiral air duct) with diameter equal to or greater than 800mm and the length of duct segment greater than 1250mm or overall surface area greater than 4m².

2. Reinforcement measure shall be taken for rectangular air duct with longer edge length greater than 630mm and edge length of insulated air duct greater than 800mm, duct segment length greater than 1250mm or single edge plain area greater than 1.2m² for low pressure system and 1.0m² for medium and high pressure system.

3. Reinforcement for irregular oval air duct shall follow that for rectangular air duct.

Inspection Quantity: as per fabrication patches, 5% sampling test and not less than 5 pieces shall be performed.

Inspection Method: physical measure by tape and observation inspection.

4.2.11 In addition to Article 4.2.10 of this Code, the reinforcement for non metallic air duct shall meet the following requirements:

1. For HPVC air duct with diameter or edge length greater than 500mm, reinforced pad shall be provided at the connector between duct and flange with the pitch not greater than 450mm.

2. For organic/inorganic fiber reinforced plastic air duct, the reinforcing material shall be of the material of the duct or equivalent material in corrosion resistance performance, and shall be integrated with the air duct .

Inspection Quantity: as per fabrication patches, 5% sampling test and not less than 5 pieces shall be performed.

Inspection Method: physical measure by tape and observation inspection.

4.2.12 For rectangular duct bend fabrication, the bending radius usually will be internal and external concentric arc of plane edge. For other types of bend, baffle vane shall be provided for the bend with the plane edge greater than 500mm.

Inspection Quantity: for other types bend, 20% sampling test and not less than 2 pieces shall be performed.

Inspection Method: observation inspection.

4.2.13 Cleaning air conditioning air duct system shall meet the following requirements:

1. For rectangular air duct with edge length less than or equal to 900mm, no joint will be allowed to set on the bottom plate. For edge length greater than 900mm, no longitudinal joint will be allowed.

2. Bolt, nut, gasket and rivet for ducting system shall match the performance character of duct plate and no electrical chemical corrosion material will be generated. Other corrosion resistance measures such as galvanization could be applied. But cord drawn rivet will not be allowed to use.

3. No reinforcing frame or stiffener will be allowed to set inside air duct. For non flanged air duct, S type insert stripe, square type insert stripe and vertical combination type insert stripe will not be allowed.

4. For cleaning air conditioning system with air cleaning degree at 1 to 5, button type seam will not be allowed for duct joint connection.

5. Detergent for air duct cleaning shall be harmful to human health and duct material.

6. For galvanized steel air duct, severe damage on galvanizing coating will not be allowed such as zine powder and pulverized ash.

Inspection Quantity: as per duct fabrication patches, 20% sampling test and not less than 5 pieces for each system shall be performed.

Inspection Method: Check material quality certificate document, observation inspection and white texture wiping test.

4.3 Common Item

4.3.1 Metal air duct fabrication shall meet the following requirements:

1. Bending radius for circular air duct ( measured from the central line) and the minimum segment quantity shall meet the requirement in Table 4.3.1-1. For circular air duct, the fabrication angle tolerant of bending angle, and the angle between trunk duct and the cross or the tee shall not be greater than 3o.

Table 4.3.1-1 Bending radius for circular air duct and the minimum segment quantity

Bend Diameter D(MM)	Radius R	Bending angle and minimum segment
		90o		60o		45o		30o
		Mid	End	Mid	End	Mid	End	Mid	End
80-220	≥1.5D	2	2	1	2	1	2	-	2
220-450	D-1.5D	3	2	2	2	1	2	-	2
450-800	D-1.5D	4	2	2	2	1	2	1	2
800-1400	D	5	2	3	2	2	2	1	2
1400-2000	D	8	2	5	2	3	2	2	2

2. The seam between duct and accessory shall be tight and firm with a consistent seam width. Angle bending shall be straight and plain and arc bending shall be even. Both end planes shall be parallel. No obvious warping or deforming. Duct surface shall be plain and smooth with irregularity not greater than 10mm height.

3. Tolerance for air duct outside diameter or outside edge length: for outside diameter or outside edge length less than or equal to 300mm, the tolerance will be 2 mm; for greater than 300mm, the tolerance will be 3mm. Duct end plane tolerance shall be 2 mm. For rectangular air duct, the difference of both diagonal lines shall not be greater than 3mm. For circle flange, the difference of any two given diameters shall not be greater than 2mm.

4. Welding joint of welded duct shall be smooth without defect such as crack, bulge, burn through, slag inclusion, porosity. Deformation on plate caused by welding shall be rectified and welding slag and splatter shall be removed.

Inspection Quantity: 10% fabrication of ventilation and air conditioning works and not less than 5 pieces shall be sampling inspected. For cleaning air conditioning works, 20% fabrication work and not less than 5 pieces shall be sampling inspected.

Inspection method: check inspection report, assembly test, physical measure by tape and observation inspection.

4.3.2 Metal flanged air duct fabrication shall meet the following requirements:

1. Air duct flange welding shall be of well fully fusion without false welding and holes. Flange plane tolerance will be 2 mm. For the same specification flange in a same fabrication patch, the bolt holes shall stay in a consistent manner and be suitable for exchange.

2. For riveting flanged air duct, the rivet shall be firm without false rivet or missing. Stub end shall be flat and firmly connected to flange. The width shall be consistent and not less than 6mm. No crack or holes will be allowed on seam and corners.

3. For welding connection between air duct and flange, the end surface of air duct shall not be higher than flange connection surface. For air duct of dust removal system, it is prefer to adopt continuous welding on inside of joint and intermittent welding on outside of joint. The end surface of air duct shall keep a distance not less than 5mm to the flange connection surface.

For spot welding connection between air duct and flange, the weld shall be of well fully fusion with a pitch not greater than 100mm. Flange shall tightly contact with air duct without any penetration crack or holes.

4. For carbon steel flange used in stainless steel air duct or aluminum air duct, the flange shall meet the specification in Table 4.2.6-1 and 4.2.6-2. corrosion resistant treatment shall be applied as per design to the flange. Material of rivet shall be of the same as air duct or others that no electrical chemical corrosive substance will be generated.

Inspection method: check inspection report, assembly test, physical measure by tape and observation inspection.

4.3.3 Non flanged air duct fabrication shall meet the following requirement:

1. Connector and connection pieces for non flanged air duct shall meet the requirements in Table 4.3.3-1 and Table 4.3.3-2. The core duct connection for circle air duct shall meet the requirements in Table 4.3.3-3.

2. Connector and connection pieces for light thickness gauged steel plate rectangular air duct shall be of dimensions proper, shape regular and the connection shall be firm and tight.

The bend edge ( or flange edge) of light thickness gauged steel plate flange shall be straight and flat with the bend tolerance not greater than 5/1000. elastic inserting stripe and spring clamp shall match with light thickness gauged steel plate flange. The corner piece shall be firmly fixed on the connection of corners of light thickness gauged steel plate flange and contacting tight. Edge surface shall be plane. Any connection joint shall not have continuous penetration crack greater than 2mm.

3. For rectangular air duct with C type and S type insert stripe, the edge shall not be greater than 630mm. The insert stripe and socket shall be consistent with each other in width with the tolerance of 2mm. Connection shall be plain and tight. Bended length of both ends shall not be less than 20mm.

4. For rectangular air duct with vertical seam and edge wrapped vertical seam, the height of the vertical stiffener shall be greater or equal to the width of steel angle flange of the same air duct specification. Vertical seam and edge wrapped vertical seam for same air duct specification shall be consistent in height. Bend angle shall be dip angle. Straightness tolerance will be 5/1000. rivet for seam connection shall ride not greater than 150mm at center and the pitch shall be equal. Rivet on corners of vertical seam shall be tight without holes.

Table 4.3.3-1 Connection type of non flanged circle air duct

Non flanged connection	Accessory Plate Thickness	Connection requirement	Application Scope
Socket connection	-	Insert depth ≥30mm, with sealing requirement	Low pressure air duct system, diameter 700mm
Socket connection with stiffener	-	Insert depth ≥20mm, with sealing requirement	Medium and low pressure air duct system
Socket connection with steel angle reinforcement	-	Insert depth ≥20mm, with sealing requirement	Medium and low pressure air duct system
Core duct connection	≥Duct plate thickness	Insert depth ≥20mm, with sealing requirement	Medium and low pressure air duct system
Vertical stiffener clamp connection	≥Duct plate thickness	Stub end and stiffener shall match each other and firm and tight	Medium and low pressure air duct system
Clamp connection	≥Duct plate thickness	Joints shall be kept a distance between each other and the clamp shall stay at center.	Medium and low pressure air duct system, width ≥100mm

Table 4.3.3-2 Connection type of non-flanged rectangular air duct

Non flanged connection	Accessory Plate Thickness	Application Scope
S type insert stripe	≥0.7	Medium and low pressure air duct system, security measure shall be taken on separate connection.
C type insert stripe	≥0.7	Medium and low pressure air duct system
Vertical Stripe	≥0.7	Medium and low pressure air duct system
Vertical seam	≥0.7	Medium and low pressure air duct system
Edge wrapped vertical seam	≥0.7	Medium and low pressure air duct system
Light thickness gauged steel plate flange stripe	≥1.0	Medium and low pressure air duct system
Light thickness gauged steel plate flange spring clamp	≥1.0	Medium and low pressure air duct system
Square straight insert stripe	≥0.7	low pressure air duct system
Vertical combined angel insert stripe	≥0.8	low pressure air duct system
Note: light thickness gauged steel plate flange could be connected by riveting flange stripe.

Table 4.3.3-3 core duct connection of circle air duct

Duct diameter D(mm)	Core duct length L(mm)	Self tapping screw and core drawn rivet quantity (Piece)	Outside diameter tolerance (mm)
			Circle duct	Core Duct
120	120	3*2	-1~0	-3~-4
300	160	4*2
400	200	4*2	-2~0	-4~-5
700	200	6*2
900	200	8*2
1000	200	8*2

Inspection Quantity: 10% fabrication works and not less than 5 pieces shall be sampling inspected. For cleaning air conditioning works, 20% fabrication work and not less than 5 pieces shall be sampling inspected.

Inspection method: check inspection report, assembly test, physical measure by tape and observation inspection.

4.3.4 Air duct reinforcement shall meet the following requirement:

1. Air duct reinforcement will adopt the following types: corrugated stiffener, vertical stiffener, steel angle reinforcement (internal and external reinforcement), steel strap reinforcement, reinforcement stiffener and support inside duct, shown as sketch 4.3.4;

(a) corrugated stiffener (b) vertical stiffener

(e) steel strap reinforcement (f) reinforcement stiffener

(g) support inside duct

2. For corrugate stiffener reinforcement, the stiffener shall stay regularly with consistent interval distance. Plate surface shall not have obvious deformation.

3. Steel angle or reinforcement stiffener shall stay regularly with consistent interval distance. The height shall be equal to or less than the flange width. Steel angle or stiffener shall connected to duct by firm riveting, with a consistent pitch not greater than 220mm. The connection shall be integrated as a complete structure.

4. Support inside duct shall fixed firmly on duct. The supporting points shall keep a consistent distance not greater than 950mm with each other and to the edge of duct and flange.

5. Reinforced frame shall be provided for duct segment with length greater than 1250mm in medium and high pressure system. For single seam of mental air duct in high pressure system, reinforcement measure shall be taken to prevent crack caused by seam expansion.

Inspection method: check inspection report, assembly test, physical measure by tape and observation inspection.

4.3.5 In addition to Article 1.3 of Clause 4.3.1 and Article 1 of Clause 4.3.2 of this Code, HPVC air duct shall meet the following requirement:

1. Both end surface of duct shall be parallel without obvious deformation. Outside diameter and outside edge length tolerance shall be 2mm. Duct surface shall be flat and regular arc bending without any irregularity greater than 5mm.

2. Edge type of weld joint and angle shall meet the requirement in Table 4.3.5.

Table 4.3.5 Weld joint Type and Edge

Weld joint type	Weld Joint Name	Sketch	Weld joint height	Plate thickness(mm)	Weld Joint Groove angle (o)
Butt joint	V type single welding		2-3	3-5	70-90
Butt joint	V type double welding		2-3	5-8	70-90
Butt joint	X type double welding		2-3	≥8	70-90
lap joint	Lap welding		≥min plate thickness	3-10
Fillet joint	Fillet welding without groove		≥min plate thickness	6-18
Fillet joint	Fillet welding without groove		≥min plate thickness	≥3
Corner joint	V type corner welding		≥min plate thickness	3-5	70-90
	V type corner welding		≥min plate thickness	5-8	70-90
	V type corner welding		≥min plate th, ickness	6-15	70-90

3. Weld joint shall be full and stay in regular manner without over burn and crack.

4. Article 4.3.11 of this Code shall be applied to Clean room air duct system.

Inspection Quantity: 10% of duct and 5% of flange and not less than 5 pieces shall be sampling inspected.

Inspection method: physical measure by tape and observation inspection.

4.3.6 In addition to Article 1~3 of Clause 4.3.1 and Article 1 of Clause 4.3.2, organic fiber reinforced plastic air duct shall meet the following requirement:

1. Air duct shall not have obvious deformation. Internal surface shall be flat and smooth and external surface shall be tight. Thickness shall be consistent. No burr on edge and other defect such as air hole or lamination.

2. Outside diameter and outside edge length tolerance shall be 3mm. The difference of any given two diameter of circle air duct shall not be greater than 5mm. The difference of the diagonal lengths of rectangular air duct shall not be greater than 5mm.

3. Flange shall be connected to air duct with a smooth transition arc. Flange shall keep a square angle to axis of air duct. Duct end surface tolerance shall be 3mm. Bolt holes shall keep consistent distance to duct wall and stay in a regularly distance with each other with the tolerance of 2mm.

4. Reinforcement shall be taken for rectangular air duct with edge greater than 900mm and segment length greater than 1250mm.

Inspection Quantity: 10% of duct and 5% of flange and not less than 5 pieces shall be sampling inspected.

Inspection method: physical measure by tape and observation inspection.

4.3.7 In addition to Article 1~3 of Clause 4.3.1 and Article 1 of Clause 4.3.2, inorganic fiber reinforced plastic air duct shall meet the following requirement:

1. Air duct surface shall be cleaning with cracking, obvious frost and lamination.

2. Outside dimensions tolerance of air duct shall meet the requirement in Table 4.3.7.

3. Requirements on flange will be same as that for organic fiber reinforced plastic.

Inspection Quantity: 10% of duct and 5% of flange and not less than 5 pieces shall be sampling inspected.

Inspection method: physical measure by tape and observation inspection.

Table 4.3.7 Outside dimensions of inorganic fiber reinforced plastic air duct(mm)

Diameter or longer edge	Rectangular duct external surface plane	Difference of the diagonal lengths of rectangular air duct	Flange surface plane	Difference of any given two diameter of circle air duct
≤300	≤3	≤3	≤2	≤3
301-500	≤3	≤4	≤2	≤3
501-1000	≤4	≤5	≤2	≤4
1001-1500	≤4	≤6	≤3	≤5
1501-2000	≤5	≤7	≤3	≤5
>2000	≤6	≤8	≤3	≤5

4.3.8 Internal concrete mortar of brick and concrete air channel shall be smooth no cracking and water penetration.

Inspection Quantity: 10% air channel and no less than 1 segment shall be sampling inspected.

Inspection Method: observation inspection.

4.3.9 In addition to Article 2 and 3 of Clause 4.3.1 and Article 2 of Clause 4.3.2, double aluminum foil thermal insulation composite air duct shall meet the following requirement:

1. It is preferred to use special connection piece for plate connection. The plate after connection shall meet the plane tolerance of 5mm.

2. Bend angle of air duct shall be straight and flat and joint shall be bond by adhesive firmly and tight. Adhesive for air duct shall be non flammable material.

3. Flange connection shall be firm with the flange surface plane tolerance of 2mm.

4. Air duct reinforcement shall follow system working pressure requirement and product technical standard.

Inspection Quantity: 10% of duct and 5% of flange and not less than 5 pieces shall be sampling inspected.

Inspection method: physical measure by tape and observation inspection.

4.3.10 In addition to Article 2 and 3 of Clause 4.3.1 and Article 2 of Clause 4.3.2, aluminum foil fiber glass composite air duct shall meet the following requirement:

1. The eccentric fiber glass composite plate shall be dry and flat. The aluminum foil for vapor protection shall be bond to the fiber glass firmly. Protection layer shall be set on internal surface to prevent fiber peeling, which shall do no harm to human health.

2. When socket connection is used for air duct connection, the bond at connection shall be tight and firm. The external surface aluminum foil tape shall keep the bonding width not less than 25mm. Auxiliary connection fixing measure shall be taken.

For flanged air duct, the connection between flange and air duct shall be firm, which will prevent fiber from out going and cold bridge.

3. Air duct surface shall be flat and both end surface shall be parallel no obvious deformation and irregularity such as concavity bulging, aluminum peeling.

4. Air duct reinforcement shall follow system working pressure requirement and product technical standard.

Inspection Quantity: 10% of duct and not less than 5 pieces shall be sampling inspected.

Inspection method: physical measure by tape and observation inspection.

4.3.11 Air duct in cleaning air conditioning system shall meet the following requirement:

1. Site shall be kept clean and dust and moisture shall be prevent during storage. Corrosion resistance treatment shall be applied to any damage on seam, bend edge and rivet.

2. The pitch of air duct flange rivet holes, for system cleanness degree at 1~5, shall be not greater than 65mm; for degree at 6~9, not greater than 100mm.

3. For static pressure box body and the frame and fixing pieces to fix the high efficient filter inside box shall be galvanized or nickel coated for corrosion protection.

4. The fabricated air duct shall be cleaned for the second time and capped after the cleaning satisfies standard.

Inspection Quantity: 20% of duct and 10% of flange and not less than 5 pieces shall be sampling inspected.

Inspection method: observation inspection, check air duct cleaning record and white texture wiping test.

5. Air Duct Accessory and Silencer Fabrication

5.1 General Requirement

5.1.1 This chapter is applicable to air diffuser, damper, exhaust hood and other accessories and silencer in ventilation and air conditioning works for fabrication and finish product acceptance.

5.1.2 Common air volume controller acceptance will be on the basis of design document and damper fabrication requirement. For other damper, acceptance will be performed as outside purchased product.

5.2 Main Control Items

5.2.1 For manual operated single vane or multiply vanes damper, turning the handle in clockwise shall be close. The adjust range and opening angel indication shall be consistent with the opening angle of vane.

For intermittent work point in dust removal system, the closed damper shall be sealed also.

Inspection Quantity: 10% and not less than 1 piece shall be sampling inspected.

Inspection Method: manual operation and observation inspection.

5.2.2 The electrical or pneumatic driver of the damper shall act reliably and be capable of operating in Maximum working pressure.

Inspection Quantity: 10% and not less than 1 piece shall be sampling inspected.

Inspection Method: check product quality certificate, performance test report and observation inspection.

5.2.3 Fire proof damper and smoke exhaust damper ( exhaust vent) must meet the standard for fire fighting product and have corresponding product quality certificate document.

Inspection Quantity: as per various types, 10% for each and not less than 2 pieces shall be sampling inspected.

Inspection Method: check product quality certificate, performance test report

5.2.4 Material for blast proof damper shall meet design requirement and material substitution shall be approved before put it into damper fabrication.

Inspection Quantity: 100%

Inspection Method: Check material type, specification and observation inspection.

5.2.5 For damper in cleaning air conditioning system, its removable parts, fixture pieces and fasteners shall be galvanized or coated ( such as plastic spray or baked vanishing finish) as corrosion resistance treatment. Any joint of damper and duct shall be firmly sealed.

Inspection Quantity: 10% of each patch and not less than 1 piece shall be sampling inspected.

Inspection Method: Check material, manual operation and observation inspection.

5.2.6 Manufacturer shall provide the strength test report (free action under 1.5 times as working pressure) and quality certificate for the damper with working pressure greater than 1000Pa.

Inspection Quantity: 10% of each patch and not less than 1 piece shall be sampling inspected.

Inspection Method: Check product quality certificate and performance test report.

5.2.7 Flexible pipe for smoke defense and exhaust system shall be non-combustion material.

Inspection Quantity: 100%

Inspection Method: Check material quality certificate

5.2.8 Acoustic baffle vane shall be provided when the surface edge of silencer bend is greater than 800mm. Protective measure shall be taken for the texture cover on the surface of silence that will directly face the pressure. Cover in silencer for cleaning air conditioning system shall be of non dust generating material.

Inspection Quantity: 100%

Inspection Method: observation inspection, check material quality certificate

5.3 Common Items

5.3.1 Manual operated damper with single vane or multiply vanes shall meet the following requirement:

1. Structure shall be firm and act free. Flange material shall be consistent to dust material.

2. Vanes overlapping shall be consistent and the joint between vane and damper body shall be less than 2mm.

3. Volume control in several group shall be applied to the damper with the cross area greater than 1.2m².

Inspection Quantity:10% for each patch and for each type and not less than 1 piece shall be sampling inspected.

Inspection Method: Manual operation, physical measure by tape and observation inspection.

5.3.2 Non return damper shall meet the following requirement:

1. Act free and close tightly.

2. Shaft and hinge for the vanes shall be made of corrosion resistant material to ensure free action and wear resistance.

3. The vanes shall be strong enough to work under maximum load pressure without deformation.

4. A reliable balance adjustment structure shall be provided for horizontally amounted non return damper.

Inspection Quantity:10% for each patch and for each type and not less than 1 piece shall be sampling inspected.

Inspection Method: observation inspection, physical measure by tape, manual operation, and check material quality certificate.

5.3.3 Plate inserting damper shall meet the following requirements:

1. Shell shall be tight and internal surface shall be corrosion resistant treated.

2. Inserting plate shall be flat and free act. Fixing pieces will be provided for reliable purpose.

3. The duct connected to plate inserting damper shall be stay in a line.

Inspection Quantity: 10% for each patch and for each type and not less than 1 piece shall be sampling inspected.

Inspection Method: manual operation, physical measure by tape and observation inspection.

5.3.4 Tee type damper shall meet the following requirement:

1. Tie rod or shaft of handle shall tightly be contacted with duct.

2. Tie rod could be fixed at any given position. Adjust angle shall be marked on handle.

3. Vanes can act free not conflicting with duct.

Inspection Quantity: 10% for each patch and for each type and not less than 1 piece shall be sampling inspected.

Inspection Method: manual operation, physical measure by tape and observation inspection.

5.3.5 Air volume balance damper shall meet product technical document.

Inspection Quantity: 10% for each patch and for each type and not less than 1 piece shall be sampling inspected.

Inspection Method: physical measure by tape and observation inspection, check product quality certificate

5.3.6 Air hood fabrication shall meet the following requirements:

1. Proper dimensions, tight connection, regular shape, flat and smooth surface without shape edge or corner.

2. Side suction hood at channel profile and joint suction hood shall be dimensions correct, corner shall be are smooth and shape regular. Suction intake shall be flat. Stiffeners for hood shall stay in a consistent distance between each other.

3. Exhaust hood for kitchen shall be corrosion resistance material. The sump pit shall be water proof and a slope will be provided towards drainage. Filter in hood shall be easy to remove for cleaning.

Inspection Piece: 10% of each patch and not less than 1 piece shall be sampling inspected.

Inspection method: physical measure by tape and observation inspection.

5.3.7 Vent cap fabrication shall meet the following requirement:

1. Dimensions proper, structure reliable. piping connection dimension tolerance for Vent cap will be same as that for air duct.

2. Reinforcement measure shall be taken for the dome of the umbrella type vent cap, with a consistent supporting height.

3. For taper type vent cap, the centers of internal and external cones shall be concentric. Cone connection joint shall facilitate water drain. Lower drain system shall be free.

4. The shape of drum type vent cap shall be regular. Reinforcement shall be applied to both edge of external drum with the out of round not greater than 2% of diameter. Dome rim shall keep a consistent distance to external drum. Wind protection ring shall be installed properly.

5. The three branch pipe of triangle type vent cap shall keep a consistent angle and firmly connected to head pipe. The taper of head pipe and branch pipe shall be 3o~4o.

Inspection Piece: 10% of each patch and not less than 1 piece shall be sampling inspected.

Inspection method: physical measure by tape and observation inspection.

5.3.8 For the baffle of rectangular bend, the edge of the vane that will face the air flow shall be smooth and vane shall be fixed. Arch of baffle shall be kept consistent with the angle of the bend. The layout of baffle vanes shall meet design requirement. Reinforcement measures shall be taken when baffle vane is greater than 1250mm long.

Inspection Piece: 10% of each patch and not less than 1 piece shall be sampling inspected.

Inspection method: Check material, physical measure by tape and observation inspection.

5.3.9 Flexible pipe shall meet the following requirement:

1. Flexible material shall be of corrosion resistant, moisture proof, air tight and mould resistant. Measures shall be taken to prevent sweating in air conditioning system. For cleaning air conditioning system, the internal surface of the flexible material shall be smooth and non dust generated.

2. It is preferred to use the flexible pipe at 150-300mm long with tight and reliable connection.

3. It is not advisable to use flexible pipe as reducer connection for leveling and alignment.

4. For the flexible pipe at structure deforming joint, it is preferred to make the flexible pipe the length of that deforming joint plus 100mm or greater.

Inspection Piece: 10% of each patch and not less than 1 piece shall be sampling inspected.

Inspection method: physical measure by tape and observation inspection.

5.3.10 Silencer fabrication shall meet the following requirement:

1. Material for silencer fabrication shall meet design requirements on fire proof, corrosion resistance, damp proof and sanitary performance.

2. Shell shall be firm and tight with the leakage rate satisfying Article 4.2.5 of this Code.

3. Acoustic filling pack shall be installed in required density and measures shall be taken to prevent settlement. Top cover for acoustic filling pack shall not be damaged. Lapping shall in the direction of air flow. Top cover shall be tied and no burr on interface.

4. Partition plate and wall plate shall contact tightly and firmly. Perforated plate shall be flat without burr. Bore diameter and go through rate shall meet design requirement.

Inspection Piece: 10% of each patch and not less than 1 piece shall be sampling inspected.

Inspection method: physical measure by tape, observation inspection and check material quality certificate.

5.3.11 Inspection door shall be tidy and act free and sealing tightly. Sealing measures shall be taken over the connection to duct or air treatment room. No obvious leakage.

For cleaning air conditioning system, the sealing pad for inspection door would be shaped sealing rubber tape or soft rubber tape.

Inspection Piece: 20% and not less than 1 piece shall be sampling inspected.

Inspection method: observation inspection

5.3.12 For diffuser acceptance, outside diameter and outside edge will govern for a proper specification with the dimension tolerance satisfying the requirement in Table 5.3.12. The finish of diffuser shall be tidy. The layout of vane or diffusing ring shall be kept consistently without obvious scrape and press. Controller shall act free and reliably. No loose displacement after controller is set.

Inspection Piece: 5% of each patch and each specification and not less than 1 piece shall be sampling inspected.

Inspection method: physical measure by tape, observation inspection, check material quality certificate and manual operation.

Table 5.3.12 Diffuser dimensions tolerance (mm)

Circle diffuser
Diameter	≤250	>250
Tolerance	0~-2	0~-3
Rectangular diffuser
Edge length	<300	300-800	>800
Tolerance	0~-1	0~-2	0~-3
Diagonal length	<300	300-500	>500
Difference of Diagonal length	≤1	≤2	≤3

6. Air Duct System Installation

6.1 General Requirement

6.1.1 This chapter is applicable to metallic and non metallic air duct system in ventilation and air conditioning works for installation quality inspection and acceptance.

6.1.2 Installed air duct system shall be undergone tightness test and qualified before released to next procedure. Tightness test of air duct system will be carried out over trunk line as major test object. Under the circumstance that the duct fabrication process is guaranteed, leakage test by lighting will be adopted for low-pressure air duct system.

6.1.3 Expansion bolt and other expansion anchor that will be sued for air duct system hanger and support fixing shall meet relevant technical document.

6.2 Main Control Item

6.2.1 When air duct goes through fire proof or blast proof wall or floor which sealing is required, inserted pipe or protective sleeve shall be provided with the steel plate thickness not less than 1.6mm. The space between air duct and protective sleeve shall be sealed by soft filling material, which shall be non combustion and do no harm to human health.

Inspection Quantity: 20% and not less than 1 system shall be sampling inspected.

Inspection Method: Physical measure by tape and observation inspection.

6.2.2 Air duct installation shall meet the following requirement:

1. No piping line will be allowed to go through air duct.

2. Well grounding shall be provided for duct in which flammable gas or explosion gas is conveyed, or which is installed in hazard area. Meanwhile, sealing measures shall be taken when such air duct goes through off plant area or other auxiliary production room and no connection joints will be allowed to set in these areas.

3. The tie sling for outdoor duct fixing shall not be tied on lightning rod or lightning net works.

Inspection Quantity: 20% and not less than 1 system shall be sampling inspected.

Inspection Method: Physical inspection by hand, physical measure by tape and observation inspection.

6.2.3 protective measures shall be taken for air duct that will convey the air with temperature greater than 80℃.

Inspection Quantity: 20% and not less than 1 system shall be sampling inspected.

Inspection Method: observation inspection.

6.2.4 Air duct accessory installation shall meet the following requirement:

1. The installation of air duct accessories and operation structure shall make sure normal functioning and easy operation.

2. For inserted plate damper installation, open position must be pulling the damper plate upwards. When the damper is installed horizontally, the plate shall be inserted in the direction of the air flow.

3. non return damper and auto exhaust damper shall be installed in a proper direction.

Inspection Quantity: 20% and not less than 5 pieces shall be sampling inspected.

Inspection Method: physical measure by tape , observation inspection and action test.

6.2.5 Fire proof damper and smoke exhaust damper (vent) shall be installed in a proper direction and position. For the partition wall between fire hazard area and non fire hazard area, the fire proof dampers on both areas shall be kept a distance not greater than 200mm to the partition wall.

Inspection Quantity: 20% and not less than 5 pieces shall be sampling inspected.

Inspection Method: physical measure by tape, observation inspection and action test.

6.2.6 Air duct for cleaning air condition system shall meet the following requirement on installation:

1. Air duct, static pressure box and other accessories shall be cleaned up and grease and dust shall be removed. Whenever the construction is stopped or completed, the end shall be sealed.

2. Flange gasket shall be the material of no dust generated, aging resistant and be of certain strength and elastic with thickness of 5-8mm. Emulsion sponge will not be allowed. Minimum assembly for flange gasket shall be kept and straight joint assembly will not be allowed. No coating will be allowed to apply on gasket surface.

3. The joint between the duct and false ceiling and partition wall and other protective construction in clean room shall be sealed tightly.

Inspection Quantity: 20% and not less than1 system shall be sampling inspected.

Inspection Method: observation inspection and white texture wiping test.

6.2.7 The installation of the centered vacuum dust cleaning system shall meet the following requirement:

1. Radius of bend of vacuum dust cleaning system shall not be less than 4 times as duct radium. Internal surface of bend shall be smooth. Bend with wrinkle will not be allowed.

2. The angle of tee in vacuum dust cleaning system shall not be greater than 45°. Cross will be a combination of two miter tee.

Inspection Quantity: 20% and not less than 2 pieces shall be sampling inspected.

Inspection Method: Physical measure by tape and observation inspection .

6.2.8Tightness test shall be carried out over various duct systems. Leakage rate shall meet design requirement and Article 4.2.5 of this Code. Tightness test of air duct shall meet the following requirement:

1. For low pressure air duct system, tightness test with sampling rate of 5% and not less than 1 system shall be performed. Under the premises that duct fabrication process is guaranteed, tightness test by lighting will be allowed. For non qualified test result, air leakage rate test in certain required sampling rate shall be performed.

For medium pressure air duct system, sampling test on air leakage rate shall be perform, after tightness test by lighting is qualified, with sampling rate of 20% and not less than 1 system.

For high pressure air duct system, 100% air leakage rate test shall be performed.

Sampling test after tightness test shall be 100% qualified. If not, sampling test with doubled sampling rate will be performed until sampling test is 100% qualified

2. For air duct tightness test of cleaning air conditioning system, air duct with cleaning degree of 1-5 will be tested as high pressure air duct system; with cleaning degree of 6-9 will be tested as per Article 4.2.5 of this Code.

Inspection Quantity: as per above Article.

Inspection Method: as per Exhibit A to this Code for tightness test.

6.2.9 For manual operated closing damper, the arrow direction marked on the damper shall be consistent with the direction of impacting wave.

Inspection Quantity: 100%

Inspection Method: observation inspection and check.

6.3 General Item

6.3.1 Air duct installation shall meet the following requirement:

1. Before air duct installation, foreign material shall be removed and measures shall be taken for duct cleaning and preservation.

2. Air duct installation shall meet the design requirement on position, elevation and route. Field duct connection shall not reduce the effective cross area.

3. Bolt for connecting flange shall be tightened consistently. It is preferred to set the nut on a same side.

4. Duct connection shall be tight and firm. Gasket for duct flange shall be fit to system function with the thickness not less than 3mm. Gasket shall not be inserted over the edge of flange.

5. The installation of flexible pipe shall be suitable with obvious twist.

6. The contractible metallic and non metallic soft duct shall not be greater than 2 m long and no dead bending and concave will be allowed.

7. For the connection between air duct and brick and concrete air channel, duct shall be inserted in the direction of the air flow and sealing measures shall be taken. Weather protection shall be provided for air duct going out of roof.

8. Isolation or corrosion resistant measures shall be taken for the contact position between stainless steel and aluminum duct and carbon steel support.

Inspection Quantity: 10% and not less than 1 system will be sampling tested.

Inspection Method: Physical measure by tape and observation inspection.

6.3.2 Non flanged duct installation shall meet the following requirements:

1. Duct connection shall be complete, flat and without defect and obvious twist.

2. The socket connection of duct shall be consistent in its sealing joints and without obvious bending wrinkle. The sealant coated on internal surface shall be complete. Sealant tape on external surface shall be bond firmly and complete without defect.

3. For light thickness gauge steel plate flange of air duct, elastic inserting stripe, spring clamp and fastening blot shall keep a consistent distance not greater than 150mm without any loose accessory.

4. For the rectangular air duct connected by inserting stripe, the plate surface after connection shall be plain without obvious bending.

Inspection Quantity: 10% and not less than 1 system shall be sampling tested.

Inspection Method: Physical measure by tape and observation inspection.

6.3.3 Air duct connection shall be flat and straight without warping. For exposed duct installation, the level tolerance shall be 3/1000 with total tolerance not greater than 20mm and the vertical tolerance shall be 2/1000 with total tolerance not greater than 20mm. For concealed duct installation, installation position shall be proper and without obvious deviation.

For dust removal system, it is preferred to set the duct in vertical direction or in decline direction with the angle to level equal to or greater than 45°. Keep the duct in level direction or in slight slope a minimum length.

For air duct which will contain condensate or other liquid, the slope of ducting shall meet design requirement and drain will be provided at the lowest position.

Inspection Quantity: 10% and not less than 1 system shall be sampling tested.

Inspection Method: Physical measure by tape and observation inspection.

6.3.4 Air duct support and hanger installation shall meet the following requirement:

1. For level installed duct with diameter or longer edge equal to or less than 400mm, the pitch between supports shall not be greater than 4m; for greater than 400mm, the pitch not greater than 3m. For spiral air duct the pitch between supports and hangers can be enlarged to 5m and 3.75m respectively. For light gauge thickness steel plate flanged duct, the pitch between support and hanger shall not be greater than 3m.

2. For vertical installed duct, the pitch shall not be greater than 4m. For each stand duct, at least 2 fixing points shall be provided.

3. Duct support and hanger type and specification selection could on the basis of international standard drawing collection and specification to have suitable support and hanger in strength and rigidity. Special support and hanger for the duct diameter or edge greater than 2500mm shall follow design requirement.

4. It’s not advisable to set support or hanger at the diffuser, damper, inspection door or auto control structure. It ‘s preferred to keep the support and hanger at least 200mm away from the diffuser or branch duct connection.

5. For level trunk duct rested on hanger with length greater than 20m, fixing point shall be provided to prevent swaying and one fixing point as a minimum shall be provided for each system.

6. Bolt hole of hanger shall be prepared by machining. Hanging rod shall be straight and flat with complete and clean screw. Each support and hanger shall bear consistent and equal press and without obvious deformation.

For adjustable vibration absorption support and hanger for air duct and air conditioning equipment, the contract or compressing volume shall be set as per design requirement.

7. For clamp support, bend edge shall straight and flat and clamp shall contact and tie the duct up tightly. For circle air duct amounted on support, bracket and clamp shall be provided and the arc of clamp shall be equal and consistent with duct outside diameter.

Inspection Quantity: 10% and not less than 1 system shall be sampling tested.

Inspection Method: Physical measure by tape and observation inspection.

6.3.5 Non metallic air duct installation shall meet the following requirements:

1. Connecting flange surface shall be parallel and connection shall be tight. Galvanized washers shall be provided for bolt on flange.

2. Suitably increase the contacting surface area between support or hanger and level air duct.

3. Expansion joint shall be provided as design required for HPVC air duct with continuous straight length over 20m. The weight of branch can not be supported by trunk and separate hanger and support shall be provided for branch.

4. For vertical installed air duct, pitch between supports shall not be greater than 3 m.

Inspection Quantity: 10% and not less than 1 system shall be sampling tested.

Inspection Method: Physical measure by tape and observation inspection.

6.3.6 Composite air duct installation shall meet the following requirement:

1. Connection of composite duct shall be firm and without holes and crack. For inserting connection, the connection shall match each and without loose connection. The joint at end shall not be greater than 5mm.

2. , ; Measures shall be taken to prevent cold bridge for flanged connection.

3. It’s preferred to follow the product’s technical standard for support and hanger installation.

Inspection Quantity: 10% and not less than 1 system shall be sampling tested.

Inspection Method: Physical measure by tape and observation inspection.

6.3.7 Installation for centered vacuum dust removal system shall meet the following requirement:

1. Slope of dust suction duct would be 5/1000 and set stand duct or duct suction point in slope direction.

2. The connection between suction nozzle and duct shall be tight and firm.

Inspection Quantity: 20% and not less than 5 pieces shall be sampling tested.

Inspection Method: Physical measure by tape and observation inspection.

6.3.8 Dampers shall be installed at a place easy for operation and maintenance. The manual or electrical operation device shall act free and reliably. The closed the damper plate shall be sealed tightly.

Separate support and hanger shall be provided for the fire proof damper with diameter or longer edge length equal to or greater than 630mm.

The position of smoke exhaust damper (exhaust vent) and manual control device (including inserted sleeve pipe) shall meet design requirement. Dead bending and shrinking are not allowed on inserted sleeve pipe.

It’s preferred to provide the damper on the vertical segment of suction portion of dust removal system.

Inspection Quantity: 10% and not less than 5 pieces shall be sampling tested.

Inspection Method: Physical measure by tape and observation inspection.

6.3.9 Vent cap shall be installed fixedly. Water penetration on the joint between the air duct and roof or wall will not be allowed.

Inspection Quantity: 10% and not less than 5 pieces shall be sampling tested.

Inspection Method: Physical measure by tape and observation inspection.

6.3.10 Exhaust hood and suction hood shall be installed in a proper position and stay tidy and firmly.

Inspection Quantity: 10% and not less than 5 pieces shall be sampling tested.

Inspection Method: Physical measure by tape and observation inspection.

6.3.11Diffuser shall be connected to air duct firmly and tightly and contacted with finish layer tightly. Surface shall be flat with out deformation. Act free and reliably. The installation joint of strip diffuser shall be a smooth transition without obvious joint. The same diffusers shall be set at a consistent elevation and stay tidy in a same room.

For the exposed diffuser that installed on ceiling, the position and the elevation tolerance shall be not greater than 10mm.

The level tolerance for diffuser installation shall not be greater than 3/1000.

The vertical tolerance for diffuser installation shall not be greater than 2/1000.

Inspection Quantity: 10% and not less than 1 system or 5 pieces for 2 rooms shall be sampling tested.

Inspection Method: Physical measure by tape and observation inspection.

6.3.12 Diffuser installation for cleaning air conditioning system shall meet the following requirements:

1. Diffuser shall be cleaned up before installation. The joint between the frame of diffuser and ceiling or wall shall be sealed by filling with sealing packing or sealant to prevent air penetration.

2. Adjustable hanger rod shall be provided for the diffuser with high efficient filter.

Inspection Quantity: 10% and not less than 1 system or 5 pieces for 2 rooms shall be sampling tested.

Inspection Method: Physical measure by tape and observation inspection.

Chapter 7 Installation of Ventilation and Air Conditioning Units

7.1 General Stipulations

7.1.1 This chapter is applicable to the inspection and acceptance for the installation quality of ventilation and air conditioning units with working pressure no more than 5Kpa.

7.1.2 For ventilation and air conditioning units, there should be packing list, equipment manual, product quality certificate, product performance test report and other documents sent together with the units. For imported equipment, there should also be commodity inspection certificates.

7.1.3 Before equipment installation, conduct open package inspection (OPI) and make acceptance records. The participators of OPI will be the representatives from Owner, Supervision Company, Construction Company, Vendor and other relevant parties.

7.1.4 Before placing equipment into place, conduct acceptance for its foundation. The equipment can not be installed until the foundation is qualified.

7.1.5 The transportation and lifting of equipment must be done according to relevant stipulations of product manual. Take measures to protect the equipment, to avoid equipment damage during transportation and lifting.

7.2 Main Control Items

7.2.1 The installation of ventilators should conform to the following stipulations:

1. Model and specification should conform to design requirements; and the outlet direction should be correct;

2. The impeller should rotate smoothly and stably, and can not be at the same position every time after stopping rotation;

3. The anchor bolts for fixing ventilators should be tightened securely, and should have anti-loose measures.

Inspection quantity: 100%

Inspection method: check as per design drawings, observe and inspect.

7.2.2 For the exposed position of ventilator driving device as well as those inlets and outlets directly connected with atmosphere, install protection cover (net) or take other safety measures.

Inspection quantity: 100%

Inspection method: check as per design drawings and observe.

7.2.3 The installation of air conditioner unit should conform to the following stipulations:

1. Model, specification, direction and technical parameters should conform to design requirements;

2. For central-station air handling units assembled at site, check its air leakage rate. The air leakage rate must conform to the stipulations of current national code GB/T 14294 “Central-station air handling units”.

Inspection quantity: random check 20% of the total number and no less than 1 set. For the units of air cleaning system, check all for grades 1~5 and random check 50% for grades 6~9.

Inspection method: check as per design drawings, and check test records.

7.2.4 The installation of dust remover should conform to the following stipulations:

1. Model, specification, as well as inlet and outlet direction should conform to design requirements.

2. For the dust remover casing assembled, check its air leakage rate. At design working pressure, the allowable air system leakage ratio is 5%, and is 3% for centrifugal dust remover.

3. For the casing and accessories of bag-type dust remover and electric dust remover, the grounding should be reliable.

Inspection quantity: random check 20% of the total number and no less than 1 set. Check 100% for grounding.

Inspection method: check as per design drawings, check test records and observe.

7.2.5 For high efficiency filters, open package at site and conduct installation after the clean room and air cleaning system have been cleaned completely and the system has been commissioned continuously for more than 12 hours.

Before installation, conduct visual inspection and instrument leak detection. For visual inspection, there should be no deformation, dropout, breakage or other damages. For random instrument leak detection, it should conform to the stipulations of product quality documents.

Install immediately after it is qualified. The direction should be correct. After installation, the surroundings and interfaces of high efficiency filters should be tight and without leakage. Before commissioning, conduct scanning leak detection.

Inspection quantity: For random instrument leak detection of high efficiency filters, the ratio is 5% based on lots and no less than 1 set.

Inspection method: Observe, conduct scanning detection as per the stipulations of Attachment B of this Code, or review detection records.

7.2.6 The installation of air cleaning unit should also conform to the following stipulations:

1. The joints between air cleaning unit and clean room enclosing structure must be sealed;

2. For fan filter unit (FFU and FMU air cleaning unit), conduct visual inspection at a clean site area. Visually there should be no deformation, erosion, paint peeling off, and splicing plate damage, etc. During system test-run, add temporary medium-efficiency filter at the air inlet for protection.

Inspection quantity: 100%

Inspection method: check as per design drawings and observe.

7.2.7 For electrostatic air filter, the metal casing should be well grounded.

Inspection quantity: random check 20% of the total number and no less than 1 set.

Inspection method: check material, observe or conduct resistance measurement.

7.2.8 The installation of electric heater should conform to the following stipulations:

1. The insulation layer between electric heater and steel frame must be non-flammable material. For the exposed wiring terminals, install safety protection cover;

2. The metal casing of electric heater should be well grounded.

3. For the flanges connecting air duct of electric heater, the gasket should be made of heat-resistant non-flammable materials.

Inspection quantity: Random check 20% of the total number and no less than 1 set.

Inspection method: Check materials, observe, or measure the resistance.

7.2.9 For the installation of dry steam humidifier, the steam nozzle should not be directed downward.

Inspection quantity: 100%

Inspection method: Observe

7.2.10 For the installation of filter absorber, the direction should be correct, separate bracket should be installed, and the spool connecting with outdoor should not leak.

Inspection quantity: 100%

Inspection method: Observe or check & measure.

7.3 General Items

7.3.1 The installation of ventilators should conform to the following stipulations:

1. The installation of ventilators should conform to Table 7.3.1. The assembling position of impeller, rotor and casing should be correct. The depth of impeller air inlet inserted into fan casing air inlet or sealing ring should conform to equipment technical document, or be 1/100 of impeller outer diameter.

Table 7.3.1 Allowable deviation for ventilator installation

Item	Description		Allowable deviation	Inspection method
1	Planimetric displacement of center lines		10mm	Theodolite or drawing lines and metering
2	Elevation		±10mm	Level gauge, straight rule, drawing lines and metering
3	Planimetric displacement of belt pulley width center		1mm	Drawing lines at the end surface of driving and driven belt pulleys; and metering
4	Levelness of transmission shaft		Longitudinal: 0.2/1000 Transverse: 0.3/1000	Use level gauge to check at the two locations, which are 0˚ and 90˚ of the shaft or belt pulley.
5	Coupling	Radial displacement of two shaft cores	0.05mm	Use dial indicator to check at the four positions of coupling, which are perpendicular with each other.
5	Coupling	Inclination of two axes	0.2/1000

2. For axial fan impellers assembled at site, the installation angle should be identical, so that the impellers can rotate at the same plane. The clearance between impeller and barrel should be uniform. The allowable deviation of levelness is 1/1000.

3. The floor for installing vibration isolator should be flat. The amount of compression for the duty borne by each group of vibration isolators should be uniform. The elevation error should be less than 2mm.

4. For the installation of vibration-isolating steel supports and hangers, the structure, appearance and dimension should conform to the stipulations of design or equipment technical documents; the welding should be secure; and the welds should be full and uniform.

Inspection quantity: Random check 20% of the total number and no less than 1 set.

Inspection method: Metering, observing or checking construction records.

7.3.2 The installation of central-station air handling units and cabinet type of air handling units should conform to the following stipulations:

1. For central-station air handling units, the assembling of each functional section should conform to the sequence and requirements specified in design. The connection between functional sections should be tight. The unit as a whole should be level and straight.

2. The connection between machine set and water supply & return pipes should be correct. For the condensate discharge pipe at the lower part of machine set, the water sealing height should meet design requirements.

3. The machine set should be clean. The unit inside should be without foreign substances, rubbish and dust deposition.

4. Inside the machine set, the air filter (mesh) and air exchanger fins should be clean and in perfect condition.

Inspection quantity: Random check 20% of the total number and no less than 1 set.

Inspection method: Observe.

7.3.3 The installation of air processing chamber should conform to the following stipulations:

1. For the assembling of wall plates and all sections of metal air processing chamber, the positions should be correct; the surface should be flat; and the connection should be tight and secure.

2. For water spraying section, the body and inspection door should be without leakage. The arrangement and specification of water spraying pipe and nozzle should conform to design stipulations.

3. For surface exchangers, the heat dispersion surface should be clean and in perfect condition. When it is used to cool down the air, water drainage device should be installed at the bottom. The induced pipe or channel for condensate should be free and without obstacle. The condensate should not overflow.

4. The gaps between surface exchanger and enclosing structure as well as gaps between surface exchangers should be blocked tightly.

5. The connection between exchangers and system water supply & return pipes should be correct, tight and without leakage.

Inspection quantity: Random check 20% of the total number and no less than 1 set.

Inspection method: Observe.

7.3.4 The installation of cellular air handling units should conform to the following stipulations:

1. For the installation of split-type air handling unit outdoor device and air-cooled packaged air handling units, the fixing should be tight and reliable. In addition to the space requirement for cooling air circulation, it also should conform to the stipulations of relevant laws and regulations on environment protection.

2. For indoor device of split-type air handling units, the installation location should be correct, the device should be kept level, and the condensate should be discharged freely. The location of pipeline going through the walls should be sealed tightly and without rainwater penetration.

3. For packaged air handling unit, the pipe connection should be tight and without leakage. There should be relevant maintenance space at the surrounding area.

Inspection quantity: Random check 20% of the total number and no less than 1 set.

Inspection method: Observe.

7.3.5 The installation of dust removers should conform to the following stipulations:

1. The dust remover should be installed at the right location. It should be installed securely and steadily. The allowable deviation should conform to Table 7.3.5.

Table 7.3.5 Allowable deviation and inspection method for installation of dust remover

Item	Description		Allowable deviation (mm)	Inspection method
1	Planimetric displacement		≤10	Theodolite or drawing lines and metering
2	Elevation		±10	Level gauge, straight rule, drawing lines and metering
3	Verticality	Per meter	≤2	Suspending lines and metering
		Total deviation	≤10

2. For moving or rotating parts of dust removers, the action should be flexible and reliable, and should meet design requirements.

3. For ash valves, discharge valves and mud valves of dust removers, the installation should be tight and should facilitate operation, maintenance and repair.

Inspection quantity: Random check 20% of the total number and no less than 1 set.

Inspection method: Metering, observing, and checking construction records.

7.3.6 For electrostatic dust removers assembled at site, the installation should also conform to equipment technical documents as well as the following stipulations:

1. For assembled anode plate, the allowable deviation for the planeness of anode block is 5mm, for the diagonal is 10mm.

2. For assembled small cathode frame, the allowable deviation for the planeness of main plane is 5mm, for the diagonal is 10mm.

3. For large cathode frame, the allowable deviation for the planeness as a whole is 15mm, for the diagonal as a whole is 10mm.

4. For electric dust remover with anode plate height ≤ 7m, the allowable deviation for the distance between positive and negative poles is 5mm; for that with anode plate height > 7m, the allowable deviation for the distance between positive and negative poles is 10mm.

5. The rammer devices should be fixed reliably and should rotate flexibly. The direction of rammer head should be correct. Rammer head should be kept in good and linear contact with rammer anvil, with the contact length of more than 0.7 times of rammer head thickness.

Inspection quantity: Random check 20% of the total number and no less than 1 group.

Inspection method: Metering, observing, and checking construction records.

7.3.7 For bag-type dust remover assembled at site, the installation should also conform to the following stipulations:

1. The casing should be tight and without leakage. The bag connection should be secure.

2. For chambered back-blowing bag-type dust remover, the filter bag should be installed straightly. The tension force for each filter bag should be maintained at 25~35 N/m. For the spools and bag caps connecting and contacting with filter bag, there should be no burr.

3. For mechanical rotary flat bag-type dust remover, the radial arms should rotate flexibly and reliably. The top cover at the upper side of clean air room should be sealed with no leakage, and should be rotated flexibly with no blockage.

4. For pulse bag-type dust remover, the spraying nozzle should be aimed at the center of Venturi tube. The allowable deviation for concentricity is 2mm.

Inspection quantity: Random check 20% of the total number and no less than 1 set.

Inspection method: Metering, observing, and checking construction records.

7.3.8 For air cleaning devices in clean room, the installation should conform to the following stipulations:

1. There should be vibration-isolating pad between ground and those air-lock chambers & sprinkling chambers with ventilators.

2. For the installation of mechanic overpressure valve, the rotating shafts for both valve body and valve plate should be level with the allowable deviation of 2/1000. The overpressure valve should be installed at the downwind of indoor air stream, and can not be within the height of working area.

3. The transmission window should be installed securely and vertically, and the joints with wall should be sealed.

Inspection quantity: Random check 20% of the total number and no less than 1 piece.

Inspection method: Metering and observing.

7.3.9 The installation of packaged clean room should conform to the following stipulations:

1. For clean room, the roof plate and wall plate (including sandwich material) should be made of non-flammable materials.

2. The floor of clean room should be dry and flat. The allowable deviation of flatness is 1/1000.

3. For components and accessory materials of wall plates, the package should be opened at a clean indoor area. Before installation, check strictly the specification and quality. Install the wall plates vertically, and use circular arc or obtuse angle joins at the bottom. After installation, the splicing joints between wall plates as well as between wall plate and roof plate should be flat and tight. The allowable deviation for the verticality of wall plate is 2/1000; and for both levelness of roof plate and geometric dimension of each single room are 2/1000.

4. The suspended ceiling of clean room should be kept straight under load, and all battens should be adhered closely. If the wall plates of clean room are up-and-down trough plates, the joints should be flat and tight. After assembling, take sealing measures for all splicing joints of clean room including the joints with buildings, to achieve no dropping and good sealing.

Inspection quantity: random check 20% of the total number and no less than 5 locations.

Inspection method: Metering, observing, and checking construction records.

7.3.10 The installation of clean laminar flow cover should conform to the following stipulations:

1. Install separated hanger rod, and take securing measures to prevent swinging.

2. For the installation of laminar flow cover, the allowable deviation for levelness is 1/1000, and for height is ±1mm.

3. The laminar flow cover should be installed on the suspended ceiling. Between its surroundings and roof plate, there should be sealing and vibration isolating devices.

Inspection quantity: random check 20% of the total number and no less than 5 pieces.

Inspection method: Metering, observing, and checking construction records.

7.3.11 The installation of fan filter unit (FFU and FMU) should conform to the following stipulations:

1. Before the installation of high efficiency filter for fan filter unit, conduct leak detection test according to item 7.2.5 of this Code. Do not start installation until it is qualified. The installation direction should be correct. After installation, it should be easy to conduct maintenance for FFU or FMU.

2. After installation, FFU fan filter unit should be flat as a whole; and connected well with suspended ceiling. For the connection between fan engine case and filter as well as between filter unit and suspended ceiling frame, there should be reliable sealing measures.

Inspection quantity: random check 20% of the total number and no less than 2 sets.

Inspection method: Metering, observing, and checking construction records.

7.3.12 The installation of high efficiency filter should conform to the following stipulations:

1. When using mechanical sealing for high efficiency filter, use seal packing materials with the thickness of 6~8mm, and position the packing to filter border. After installation, the compression of packing material should be uniform, with the compression ratio of 25%~50%.

2. When using liquid channel sealing, the channel truss should be installed horizontally and without leakage. The channel inside should be without dirt and water. The level of sealing liquid inside the channel is better being 2/3 of channel depth. The melting point of sealing liquid should be higher than 50℃.

Inspection quantity: random check 20% of the total number and no less than 5 sets.

Inspection method: Metering and observing.

7.3.13 The installation of silencer should conform to the following stipulations:

1. Before installation, keep the silencer clean and ensure that there is no oil stain and floating dust.

2. The silencer should be installed in right location and direction, and connected with air duct tightly. There should be no damage and damping. Two groups of silencers with same type can not be connected in series directly.

3. For built-up type silencer assembled at site, the arrangement, direction and location of silencer components should meet design requirements. Single silencer component should be fixed securely.

4. Set up separated support and hanger for silencer and silencing elbow.

Inspection quantity: For packaged silencers, random check 10% of the total number and no less than 5 sets; for site assembled silencers, check 100%.

Inspection method: Hand turning, observing and checking installation records.

7.3.14 The installation of air filter should conform to the following stipulations:

1. The installation should be flat, secure and with correct direction. The connection between filter and frame as well as between frame and enclosing structure should be tight and without seam penetration.

2. For the installation of frame-type or low and medium efficiency bag-type air filters, press filter surroundings and frame tightly and uniformly without visible gap. Moreover, it should also facilitate to dismantle and replace filter materials.

3. For the installation of spiral-type filters, the frame should be flat; the spread filter material should be with suitable degree of tightness; as well as upper and lower barrel bodies should be in parallel.

Inspection quantity: Random check 10% of the total number and no less than 1 set.

Inspection method: Observe.

7.3.15 The installation of fan coil set should conform to the following stipulations:

1. Before the installation of machine set, it is better to conduct three-speed test run and hydraulic test for single machine. The test pressure is 1.5 times of system working pressure, and the test duration is 2 minute. It will be treated as qualified if there is no leakage.

2. Install separate support and hanger for machine set. The installation position, height and gradient should be correct; and the fixing should be secure.

3. The connection between machine set and air duct, return air box or air port should be tight and reliable.

Inspection quantity: Random check 10% of the total number and no less than 1 set.

Inspection method: Observe; review and check test records.

7.3.16 For the installation of rotating-wheel type of exchangers, the location, wheel rotating direction and pipe connection should be correct; and the operation should be smooth and stable.

Inspection quantity: Random check 20% of the total number and no less than 1 set.

Inspection method: Observe.

7.3.17 The rotating-wheel type of dehumidifier should be installed securely. The rotating wheel and drive components should be flexible, reliable and with correct direction. The nozzles for processing air and regeneration air should be installed correctly. The horizontal air vent pipe should be kept with a certain gradient and inclined to vent direction.

Inspection quantity: Random check 20% of the total number and no less than 1 set.

Inspection method: Observe.

7.3.18 For the installation of steam humidifier, set up separate bracket and fix securely. The nozzle should be with correct dimension and without leakage.

Inspection quantity: Random check 20% of the total number and no less than 1 set.

Inspection method: Observe.

7.3.19 The air screen fan should be installed securely and reliably with right location and direction. The deviation for both longitudinal verticality and transverse levelness can not be larger than 2/1000.

Inspection quantity: Random check 20% of the total number and no less than 1 set.

Inspection method: Observe.

7.3.20 For the installation of variable air flow end device, set up separate support and hanger. Before the connection with air duct, it is better to conduct action test.

Inspection quantity: Random check 10% of the total number and no less than 1 set.

Inspection method: Observe; review and check test records.

Chapter 8 Installation of Air Refrigerating System

8.1 General Stipulations

8.1.1 This chapter is applicable to the inspection and acceptance for the construction quality of packaged, assembling and cellular refrigerating units (including heat pumps), refrigerating accessories, other associated equipment and piping system, with the working pressure no higher than 2.5Mpa and working temperature within –20~150℃.

8.1.2 For refrigerating units, refrigerating accessories, piping, fittings and valves, the model, specification, performance and technical parameters must meet design requirements. For equipment and units, the surfaces should be without damage; sealing should be good, as well as the associated documents and fittings should be complete.

8.1.3 For the steam, fuel oil, fuel gas supply system and cold accumulation system associated with refrigerating unit, the installation should also conform to the stipulations of design documents, relevant fire-fighting specifications and product technical documents.

8.1.4 For the refrigerating unit of air conditioners, the transportation and lifting should conform to the stipulations of product technical documents and item 7.1.5 of this Code.

8.1.5 For the body of refrigerating unit, the installation, test, test run and acceptance should also conform to relevant items of current national code GB 50274 “Code for construction and acceptance of refrigeration and air separating equipment installation engineering”

8.2 Main Control Items

8.2.1 The installation of refrigerating units and refrigerating accessories should conform to the following stipulations:

1. For refrigerating units and refrigerating accessories, the model, specification and technical parameters must meet design requirements. Product certificates and product performance test reports should be available.

2. For the concrete foundation of the units, conduct turn-over quality acceptance. Install the unit after the foundation is qualified.

3. The location, elevation and nozzle direction of units must meet design requirements. For those refrigerating units and refrigerating accessories fixed by anchor bolts, the sizing block should be placed in right location and should contact closely; the bolts should be tightened securely; and anti-loose measures should be taken.

Inspection quantity: 100%

Inspection method: According to drawings, check equipment model and specification, product quality certificates as well as performance test reports.

8.2.2 For direct expansion surface cooler, the appearance should be clean and complete; air and refrigerant should flow reversely; the clearances between surface cooler and casing should be plugged tightly; and the condensate discharge should be unobstructed.

Inspection quantity: 100%

Inspection method: Observe

8.2.3 For the installation of equipment and piping for fuel oil system as well as the installation of oil storage tanks and daily service oil tanks, the location and connection position should meet design and fire-fighting requirements.

The installation of fuel oil system equipment should meet design and fire-fighting requirements. For pressure regulation devices and filters, the installation and adjustment should conform to the stipulations of equipment technical documents; and the grounding should be reliable.

Inspection quantity: 100%

Inspection method: Check as per drawings, observe, and review grounding test records.

8.2.4 For refrigerating unit, all technical data of tightness test and test run should conform to the stipulations of equipment technical documents. For assembling refrigerating unit and site refrigerant filled unit, conduct blowing, tightness test, vacuum test and filled refrigerant leak detection test, the relevant technical data of which must conform to product technical documents as well as relevant current national standards and codes.

Inspection quantity: 100%

Inspection method: Witness, observe, inspect and review test run records.

8.2.5 The installation of piping, fittings and valves for refrigerating system should conform to the following stipulations:

1. For the piping, fittings and valves of refrigerating system, the model, material and working pressure must meet design requirements; the ex-work certificates and quality certificates should be available.

2. &nbs, p; The sealing material at flanges and threads should be compatible with the performance of medium in the pipe.

3. The pipe for liquid refrigerant can not be installed upward to “W” shape; and the pipe for gases can not be installed downward to “W” shape (with the exception of special oil return pipe). The branch line for liquid must be led out from bottom or side of main pipeline; and the branch line for gas must be led out from top or side of main pipeline. If there are more than two branch lines led out from main pipeline, the connection position should be staggered, with the distance no less than 2 times of branch diameter and no less than 200mm.

4. For the connection of refrigerant pipe between refrigerating unit and accessories, the degree and aspect of slope should meet the requirements of design and equipment technical documents; and conform to Table 8.2.5 when there is no stipulation in design.

Table 8.2.5 Degree and aspect of slope for refrigerant pipe

Piping description	Aspect of slope	Degree of slope
Compressor horizontal air suction pipe (Fluorine)	Compressor	≥ 10/1000
Compressor horizontal air suction pipe (Nitrogen)	Evaporator	≥ 3/1000
Compressor horizontal air exhaust pipe	Oil separator	≥ 10/1000
Condenser horizontal liquid supply pipe	Liquid accumulator	（1~3）/1000
Horizontal pipe from oil separator to condenser	Oil separator	（3~5）/1000

5. Before put refrigerating system into operation, conduct calibration for safety valves, the open and reset pressure of which should meet the requirements of equipment technical documents.

Inspection quantity: Random check 20% of the total number and no less than 5 pieces. For item 5, check 100%.

Inspection method: Check certificates, observe, measure with leveling instrument, and review calibration records.

8.2.6 For fuel oil piping system, set up reliable electrostatic proof grounding devices. For pipe flanges, use galvanized bolt connection, or jumper connection at the flange position by copper conductors. The flanges should be well connected.

Inspection quantity: 100% of the whole system

Inspection method: Observe and review test records.

8.2.7 Do not use nonmetallic hose for the connection between fuel gas system pipe and machine set. For blowing and pressure test of fuel gas pipe, use compressed air or nitrogen, do not use water. When the pressure of fuel gas supply pipe is higher than 0.005Mpa, the application standard for NDE of seams should be according to design stipulations. If there is no stipulation in design and use UT, check 100% and regard those no lower than grade II as qualified.

Inspection quantity: 100% of the whole system

Inspection method: Observe; review NDE reports and test records.

8.2.8 For ammonia refrigerant system, do not use copper or copper alloy (except phosphor bronze) for pipes, accessories, valves and packing materials, and do not conduct galvanization for pipe inside. For pipe welds of ammonia system, conduct radiographic test with the ratio of 10%, and regard those with quality no lower than grade III as qualified. For those welds at the location where it is not easy to conduct RT, it is possible to use UT instead, and those with quality no lower than grade II will be regarded as qualified.

Inspection quantity: 100% of the whole system

Inspection method: Observe; review NDE reports and test records.

8.2.9 For the piping system used to transfer glycol solution, do not use inside galvanized pipes and fittings.

Inspection quantity: Random check 20% of system spools, and no less than 5 pieces.

Inspection method: Observe and review installation records.

8.2.10 For refrigerating piping system, strength test, tightness test and vacuum test should be conducted; and the results should be qualified.

Inspection quantity: 100% of the whole system

Inspection method: Witness, observe and review test records.

8.3 General Items

8.3.1 The installation of refrigerating units and refrigerating accessories should conform to the following stipulations:

1. For the installation of refrigerating units and refrigerating accessories, the allowable deviation of location and elevation should conform to the stipulations of Table 8.3.1:

Table 8.3.1: Allowable deviation and inspection method for the installation of refrigerating units and refrigerating accessories

Item	Description	Allowable deviation (mm)	Inspection method
1	Planimetric displacement	10	Theodolite or drawing lines and metering
2	Elevation	±10	Level gauge or theodolite, drawing lines and metering

2. For the integral installation of refrigerating units, the allowable deviation for the vertical and horizontal levelness of unit body is 1/1000, and should conform to equipment technical documents.

3. For the installation of refrigerating accessories, the allowable deviation of levelness or verticality is 1/1000, and should conform to equipment technical documents.

4. For those refrigerating units or refrigerating accessories with vibration isolation devices, the vibration isolators should be installed in the right position. The amount of compression for each vibration isolator should be uniform and identical, and the deviation should be no more than 2mm.

5. For the refrigerating units with spring vibration isolator, there should be positioning devices to prevent horizontal displacement during operation.

Inspection quantity: 100%

Inspection method: At the machine base or a designated reference surface, use leveler and level gauge to check; metering and observing.

8.3.2 For the parallel combination of several module-type water chilling units, the connection should be secure and tight without leakage. After connection, the unit appearance should be flat, undamaged and without obvious distortion.

Inspection quantity: 100%

Inspection method: Metering and observing

8.3.3 For the installation of oil pump in fuel oil system and secondary refrigerant pump in cold accumulation system, the allowable deviation of levelness and verticality is 1/1000; the allowable deviation of axial inclination for two coupling cores is 0.2/1000; and the radial displacement is 0.05mm.

Inspection quantity: 100%

Inspection method: At the machine base or a designated reference surface, use leveler and level gauge to check; metering and observing.

8.3.4 The installation of piping and fittings for refrigerating system should conform to the following stipulations:

1. Inner and outer walls of pipes and fittings should be clean and dry. For support hangers of copper pipelines, the model, location, distance and pipe installation elevation should meet design requirements. For the suction and discharge pipes connecting to refrigerating units, install separate brackets. For the copper pipelines with pipe diameter ≤20mm, install brackets at the location of valves. When the pipelines are laid in parallel upper and lower, the suction pipeline should be at the lower.

2. For the elbows of refrigerant pipeline, the bend radius should be no less than 3.5D (pipeline diameter); and the difference between largest and smallest outer diameters should be no larger than 0.08D. Do not use welded elbows or wrinkled elbows.

3. For the branch of refrigerant pipeline, bend it to 90 degree according to the medium flow direction and connect it with main pipe. It is not suitable to use pressed elbow with bend radius lower than 1.5D.

4. The cut of copper pipe should be flat, without burrs, concave convex and other defects. The cut is allowed to be inclined, with the allowable deviation of 2% of pipe diameter. After folded selvedge, the nozzle should be kept as concentric, there should be no crack or wrinkle; and there should be good sealing surface.

5. For the copper pipes connected by socket braze welding, the insert depth should conform to the stipulations of Table 8.3.4. The hole enlarging direction for socket welding should be facing with medium flow direction. When using jacket braze welding for connection, the insert depth should be no less than that stipulated for socket connection.

When the pipeline is fit up by butt welding, the inner wall of pipeline should be flat and level, with the mismatch no more than 0.1 times of wall thickness, and no more than 1mm.

Table 8.3.4 Hole enlargement depth for the socket joint of copper pipe (mm)

Copper specification	DN15	DN20	DN25	DN32	DN40	DN50	DN65
Hole enlargement depth for socket joint	9~12	12~15	15~18	17~20	21~24	24~26	26~30

6. For the pipeline crossing wall body or floor slab, the welding connection between support hanger and steel pipe should be conducted according to relevant stipulations of this Code, Chapter 9.

Inspection quantity: Random check 20% as per systems, and no less than 5 pieces.

Inspection method: Metering and observing.

8.3.5 The installation of valves for refrigerating system should conform to the following stipulations:

1. Before the installation of refrigerant valves, conduct strength test and tightness test. For strength test, the pressure is 1.5 times of valve nominal pressure, and the duration is no less than 5 minutes; for tightness test, the pressure is 1.1 times of valve nominal pressure, the duration is 30 seconds, and the qualification standard is that there is no leakage. After the valves are proved to be qualified, keep valve body inside clean. If valve inlet or outlet can not be closed completely, or valve body is rusted, dismantle the valve and conduct cleaning.

2. The location, direction and elevation should meet design requirements.

3. For the valves on horizontal pipelines, the handle can not be installed downward; for those on vertical pipelines, the handle should be installed with the direction easy to operate.

4. For the installation of self-control valves, the location should meet design requirements. For solenoid valves, control valves, thermoexpension valves and elevating check valves, all the valve heads should be directed upward. For thermoexpension valves, the installation location should be higher than that of temperature sensing package. The temperature sensing package should be installed on the gas return pipe at the end of evaporator, and should be contacted well and bound tightly.

5. The safety valves should be installed vertically at the position easy to conduct maintenance. The outlet of air vent pipe should be toward safety area. The liquid discharge pipe should be installed on water drainage pipe.

Inspection quantity: Random check 20% as per systems, and no less than 5 pieces.

Inspection method: Metering, observing, witnessing or reviewing test records.

8.3.6 For the blowing of refrigerating system, use dry compressed air or nitrogen with the pressure of 0.6Mpa. Check with light color of cloth for 5 minutes, and regard it as qualified when there is no dirt. After blowing, remove and clean valve plugs of the valves in the system.

Inspection quantity: 100%.

Inspection method: Observing, witnessing or reviewing test records.

9 Installation of Piping and Equipment of
Air Conditioning Water System

9.1 General Rules

9.1.1 This chapter is suitable for water system installation sub-item works of air conditioning project, including inspection and acceptance of construction quality of equipment (excluding equipment at ends), piping and accessory for cold (hot) water, cooling water and condensate water system.

9.1.2 Galvanized steel pipes shall apply thread connection. When pipe diameter is more than DN100, may apply clip type, flange or welding connection, but shall carry out anticorrosion treatment to surface of weld seam and heat affected zone.

9.1.3 Enterprises engaging welding of metal piping shall have welding procedure qualification appraisal corresponding to the project. Welding operators shall have welding qualification certificates corresponding to the weld type.

9.1.4 Installation of steam piping for air conditioning shall follow provisions of current national standard “Code for acceptance of construction quality of water supply and discharge and heating of building work” GB50242-2002.

9.2 Main Control Items

9.2.1 Model, specification, material and connection type of equipment, accessory equipment, piping, piping fitting and valves of water system of air conditioning project shall meet design provisions.

Inspection quantity: Random check 10% of total amount, and not less than 5 pieces.

Inspection method: observe and inspect visual quality and inspect product quality certification document and acceptance record of incoming materials.

9.2.2 Installation of piping shall meet the following provisions:

1 Concealed piping must be carried out according to Clause 3.0.11 of this specification.

2 Fire bending shall not be used for welded steel pipes and galvanized steel pipes.

3 Connection of piping and equipment shall be carried out after equipment installation completed. Connection with water pump and refrigerating unit must use flexible joint. Flexible spool shall not be grouped and connected with force; piping connected with it shall set up independent support.

4 Cold and hot water and cooling water system shall be interpenetrated with refrigerating unit and air condition equipment only after flushing and waste discharge of system is qualified (visual inspection: color and transparency of water at outlet compared with that at inlet is close, and without visible foreign matters), cycled for more than 2 hours again and water quality is normalized.

5 Pipe support and hanger fixed at architecture structure shall not affect structure safety. Places where piping passing through wall or floor shall be provided with steel casing, piping joint shall not be arranged inside casing, steel casing shall be at the same level of wall covering or bottom of floor, its upper part shall be 20~50mm higher than floor ground, and shall not use casing as piping support.

Gaps surrounding insulation piping and casing shall use non-flammable insulation material to plug in tightly.

Inspection quantity: full system inspection. For piping and parts of each system, random check 10% and not less 5 pieces as well.

Inspection method: dipstick metering, inspection by observation, stand at side or review inspection record and concealed work record.

9.2.3 After installation of piping system completed and visual inspection qualified, shall carry out hydro test according to design requirement. When no requirement is specified by design, shall meet the following provisions:

1 Test pressure of hot and cold water and cooling water system, when its working pressure is less than or equal to 1.0MPa, is 1.5 times of working pressure, but the lowest is not less than 0.6MPa; When its working pressure is more than 1.0MPa, it’s working pressure plus 0.5MPa.

2 For cold (hot) medium water, and cooling water piping system of large of high-rise buildings that are of quite big vertical position difference, shall apply the combination of pressure test in sections and in layers, and system pressure test. For general building, shall apply system pressure test.

Pressure test in sections, and in layers: carry out pressure test for relatively independent piping in partial area. Under test pressure, hold pressure for 10min, pressure shall not decrease, then decrease system pressure to working pressure, hold pressure for 60min which shall not decrease, when visual inspection is made and no leakage is found, then it is qualified.

System pressure test: when pipes in each section are all connected with system main pipes, carry out system pressure test for the piping of the whole system, the test pressure is subject to the pressure at the lowest point, but the pressure at lowest point shall not exceed the bearing pressure of piping and assembled parts. After pressure is raised to test pressure, hold the pressure for 10min, the pressure drop shall not be more than 0.02MPa, then decrease the system pressure to working pressure, when visual inspection is made and no leakage is found, then it is qualified.

3 Strength test pressure for all kinds of pressure-resistant plastic tubes is 1.5 times of working pressure; tightness working pressure is 1.15times of design working pressure.

4 Condensate water system applies filling water test, shall be qualified when no leakage is found.

Inspection quantity: full system inspection.

Inspection method: stand at side or review test record.

9.2.4 Installation of valves shall meet the following provisions:

1 Valve installation position, height, inlet and outlet direction must meet design requirement, connection shall be fixed tightly.

2 Handles of various manual valves installed at insulated piping shall not be downward.

3 Visual inspection must be carried out for valves before installation. Nameplates of valves shall meet provisions of current national standard “Signs of general valves” GB 12220. Valves with working pressure more than 1.0MPa and acting as blocking function on main trunk piping shall carry out strength test and air tightness test, only can be put into use after qualified. It is not necessary for other valves to carry out test independently. They can be tested during system pressure test.

During strength test, test pressure is 1.5 times of nominal pressure; the duration time is not less than 5min; casing and packing of valves shall have no leakage.

During air tightness test, test pressure is 1.1 times of nominal pressure; test pressure shall remain unchanged during the time of test ongoing, time shall meet provisions indicated in Table 9.2.4; when there is no leakage at the sealing surface of valve flaps, then qualified.

Table 9.2.4 Duration time of valve pressure

Nominal diameter DN (mm)	Min. test duration time (s)
	Air tightness test
	Metallic seal	Nonmetallic seal
≤50	15	15
65~200	30	15
250~450	60	30
≥500	120	60

Inspection quantity: for clause 1 and 2, random check 5%, and no less than 1 piece. For hydro test, random check 20% and no less than 1 piece for the same batch (same brand, same specification, same model). For valves of closed circuit acting as blocking function that are installed at main trunk pipes, full amount inspection.

Inspection method: check according to design drawings, inspection by observation, stand at side, or review test record.

9.2.5 Compensation amount and installation position of compensators must meet requirement of design and product technical documents, and shall carry out pre-tension or pre-compression according to compensation amount calculated by design.

Piping with compensator (expansion joint) provided shall have fixed support, which structure type and fixing position shall meet design requirement, and that shall be fixed before pre-tension (or pre-compression) of compensator; setup of guide supports shall meet requirement of technical documents for product installed.

Inspection quantity: random check 20%, and no less than 1 piece.

Inspection method: inspection by observation, stand at side or review pre-tension or pre-compression record of compensator.

9.2.6 Model, specification and technical parameters of cooling tower must meet design requirement. Installation of cooling tower with flammable material must strictly follow construction fireproof safety regulations.

Inspection quantity: full amount inspection.

Inspection method: check against drawings, and supervise the execution of fireproof regulation.

9.2.7 Model, specification and technical parameters of water pumps shall meet design requirement and product performance index. Time for normal continuous test run of water pump shall not be less than 2h.

Inspection quantity: fully inspected.

Inspection method: check against drawings, and measure actually or review test run record of water pumps.

9.2.8 Water filling test or hydro test of water tank, water collecting sump, water separator and cold storage tank must meet design requirement. Material, painting quality and thickness of anticorrosion coating inside cold storage tank must meet requirement of design or product technical documents; cold storage tank and base must carry out heat insulation treatment.

Inspection quantity: fully inspected.

Inspection method: check by dipsticking metering, observation, and review test run record of water pumps.

9.3 Common Items

9.3.1 When piping of air conditioning water system applies organic material piping such as hard PVC-C, PP-R, PB and PEX used for buildings, the connection method shall meet requirement of design and product technical requirement.

Inspection quantity: Random check 20% of total amount, and not less than 2 places.

Inspection method: dipstick metering, inspection by observation, check product qualified certificate and test record.

9.3.2 Welding of metallic piping shall meet the following provisions:

1 Type, specification and performance of piping welding materials shall meet design requirement. Grouping and bevel type of butt weld of piping shall meet the provisions indicated in Table 9.3.2; The straightness of butt weld is 1/100, but the whole length no more than 10mm. Fixed weld place of piping shall be far away from equipment, and shall not be coincided with center line of equipment connection. The distance between piping butt weld and support and hangers shall be more than 50mm.

Table 9.3.2 Bevel type and size of weld for piping

No	Thickness	Bevel name	Bevel type	Bevel size			Remark
				Gap	Root face	Bevel angle
1	1~3	I-type bevel		0~1.5	__	__	Mismatch amount of inner wall ≤0.1T, and ≤2mm; outer wall ≤3mm
	3~6			1~2.5
2	6~9	V-type bevel		0~2.0	0~2	65~75
	9~26			0~3.0	0~3	55~65
3	2~30	T-type bevel		0~2.0	__	__

2 Piping weld seam shall be clean, and shall be carried out inspection of visual quality. Visual quality of weld seam shall not be lower than provisions of grade IV (ammonia pipe is grade III) in Clause 11.3.3 of current national standard “Code for construction and acceptance of site equipment, industrial piping weld project” GB 50236.

Inspection quantity: random check 20% of the total amount, and no less than 1 place.

Inspection method: dipstick metering, inspection by observation.

9.3.3 For piping connected by thread, thread shall be clean and in good shape, threads missing or broken are not more than 10% of total threads; connection is fixed; exposed threads at root of connection are 2-3 threads, without packing exposed; attention shall be paid to protect galvanized layer of galvanized piping, for damage at partial area, shall carry out anti-corrosion treatment.

Inspection quantity: random check 5% of the total amount, and no less than 5 places.

Inspection method: dipstick metering, inspection by observation.

9.3.4 For piping connected with flange, the flange surface shall be vertical to the centerline of piping, and in the same concentricity. Butt connection of flange shall be in parallel, its deflection shall not be larger than 1.5/1000 of its outer diameter, and not more than 2mm; the length of connection bolts shall be in uniform, nuts shall be at the same side, and tightened evenly. Bolts, after tightened, shall not be lower than the flat surface of nuts. Bushing specification, type and thickness of flanges shall meet design requirement.

Inspection quantity: random check 5% of the total amount, and no less than 5 places.

Inspection method: dipstick metering, inspection by observation.

9.3.5 Installation of steel piping shall meet the following provisions:

1 Pipes and fittings, before installation, shall be cleaned and have wastes at inner and outer walls and rusts removed. When piping installation is interrupted, shall seal the open pipe mouth in time.

2 For bending radius of elbow bent from pipe, the heat bending shall not be less than 3.5 times of outer diameter of pipe, and cold bending shall not be less than 4 times; welded elbow shall not be less than 1.5 times; punched elbow shall not be less than 1 times. Difference between maximum and minimum outer diameter of elbow shall not be larger than 8/100 of outer diameter of pipe. Thinning rate of pipe wall shall not be more than 15%.

3 Sloping of condensate water discharge shall meet requirement of design documents. When no requirement is specified by design, its sloping shall be more than or equal to 8‰; the length of hose connection shall not be more than 150mm.

4 Insulated pads (bearing strength shall meet the piping-weight non-flammable and flame-resisting hard insulation material or wood pads with anticorrosion treatment) shall be placed between cold and hot water piping, and support and hanger. Its thickness shall not be less than that of insulation layer; its width shall be more than that of bearing surface of support and hanger. Surface of pads shall be flat; the gap of joining surface of pads shall be fully filled.

5 Coordinate, elevation and bending degree at transverse and longitudinal direction of the piping installed shall meet Table 9.3.5. Position of concealed piping inside the suspended ceiling shall be correct without obvious deflection.

Table 9.3.5 Allowable deflection and inspection method of piping installed

Item			Allowable deflection (mm)	Inspection method
Coordinate	Overhead and trench	Outdoor	25	Inspect start point, end point, branch point and direction change point of piping and straight piping between points according to system Use theodolite, balance level, liquid connecting vessel, level gauge, guy wire and dipsticking for inspection
		Indoor	15
	Bury in earth		60
Elevation	Overhead and trench	Outdoor	±20
		Indoor	±15
	Bury in earth		±25
Straightness of horizontal piping		DN≤100mm	2L‰, max 40	Use ruler, guy wire and dipstick metering for inspection
		DN>100mm	3L‰, max 60
Verticality of vertical pipe			5L‰, max 25	Use ruler, wire cylinder, guy wire and dipstick metering for inspection
Distance between piping sections in rows			15	Use ruler and dipstick metering for inspection
Piping sections in rows or valves in rows are at the same plane level			3	Use ruler, guy wire and dipstick metering for inspection
Note: L – valid length of piping (mm).

Inspection quantity: random check 10% of the total amount, and no less than 5 places.

Inspection method: dipstick metering, inspection by observation.

9.3.6 Installation of steel plastic compound piping, when system working pressure is not more than 1.0Mpa, may use steel pipe plastic coated (bushed) thread connection, the connecting depth with piping fitting and torque shall follow Table 9.3.6-1;when system working pressure is 1.0~2.5Mpa, may use plastic coated (bushed) seamless steel pipe flange for connection or channel type connection, piping fitting s are all seamless steel pipe plastic coated (bushed) fittings.

For piping using channel type connection, its channel and rubber seal ring and clip casing must be qualified matching product; distance between supports and hangers shall follow provisions of Table 9.3.6-2.

Table 9.3.6-1 Thread connection depth and fixing torque of steel plastic compound pipes

Nominal diameter (mm)		15	20	25	32	40	50	65	80	100
Thread connection	Depth (mm)	11	13	15	17	18	20	23	27	33
Thread connection	Tooth No.	6.0	6.5	7.0	7.5	8.0	9.0	10.0	11.5	13.5
Torque (N·m)		40	60	100	120	150	200	250	300	400

Table 9.3.6-2 Channel of channel type connected piping and distance between support and hanger and fixing torque of steel plastic compound pipes

Nominal diameter (mm)	Channel depth (mm)	Allowable deflection (mm)	Distance between support and hanger (m)	Allowable deflection of verticality of end surface (mm)
65~100	2.20	0~+0.3	3.5	1.0
125~150	2.20	0~+0.3	4.2	1.5
200	2.50	0~+0.3	4.2
225~250	2.50	0~+0.3	5.0
300	3.0	0~+0.5	5.0
Note: 1 Continuous pipe end surface shall be flat, smooth without burr; if channel is too deep, shall be considered as rejected product, and shall not be put into use. 2 Hanger and support shall not fix on connecting joint; space between any two of connection joints of horizontal pipe must be provided with support and hanger.

Inspection quantity: random check 10% of the total amount, and no less than 5 places.

Inspection method: dipstick metering, inspection by observation, review product qualified certification document.

9.3.7 Connection of air blower coil machine and other air conditioning equipment and piping shall use flexible nozzle or hose (metallic or nonmetallic hose), its pressure withhold value shall be more than or equal to 1.5 times of working pressure. Connection of hose shall be tight, without force twisting and shriveled hose.

Inspection quantity: random check 10% of the total amount, and no less than 5 places.

Inspection method: observation, review product qualified certification document.

9.3.8 Type, position, distance and elevation of metallic piping shall meet requirement of design or relevant technical standard. When no requirement is specified by design, shall meet the following provisions:

1 Installation of support and hanger shall be flat and fixed, and in close contact with piping. Independent support and hanger shall be provided at connection between piping and equipment.

2 Hanger and support of main and trunk pipes inside machine room for cold (hot) medium water and cooling water system piping shall use weight-bearing shake-proof pipe rack; pipe rack connected with equipment shall have vibration reduction measures. When pipe rack of horizontal branch pipe applies single bar hanger, shall provide weight-bearing shake-proof support and hanger at piping start point, end point, valve, tee, bend in an interval of 15m.

3 For piping hanger without heat displacement, its hanging bar shall be installed vertically; when there is heat displacement, the hanging bar shall be installed with displacement at the reverse direction of heat expansion (or cold shrinkage), displacement amount is defined according to calculation.

4 Sliding surface of sliding support shall be clean and flat, its installation position shall displace 1/2 displacement value from center of bearing surface to reverse direction of displacement or meet the specification of design documents.

5 Vertical pipe inside vertical shaft shall be placed with guiding support every 2~3 layers. When it is allowed for building structure to bear weight, the distance of hanger and support for vertical installed piping shall meet Table 9.3.8.

Table 9.3.8 Maximum distance between support and hanger for steel piping

Nominal diameter (mm)		15	20	25	32	40	50	70	80	100	125	150	200	250	300
Max distance between supports (m)	L₁	1.5	2.0	2.5	2.5	3.0	3.5	4.0	5.0	5.0	5.5	6.5	7.5	8.5	9.5
	L₂	2.5	3.0	3.5	4.0	4.5	5.0	6.0	6.5	6.5	7.5	7.5	9.0	9.5	10.5
	For piping over 300mm, may refer to 300mm piping.
Note: 1 Suitable for piping system with working pressure no more than 2.0MPa, and not insulated or density of insulation material no more than 300kg/m³. 2 L₁ used for insulated piping, L₂ used for non-insulated piping.

6 Welding of piping support and hanger shall be done by welding operator bearing qualified on-post certificate. Defects such as missing welding, incomplete welding or weld crack shall not be allowed. When welding between support and piping, undercut amount at piping side shall be less than 0.1 pipe wall thickness.

Inspection quantity: random check 5% of system support amount, and no less than 5 places.

Inspection method: dipstick metering and observation.

9.3.9 When piping of hard PVC-U, PP-R and PEX used for buildings are applied, places between piping and metallic support and hanger shall be proved with insulation measures, no direct contact allowed. When piping is for hot water, shall increase its contact surface, the distance between support and hanger shall meet provisions of design and product technical requirement.

Inspection quantity: random check 5% of system support amount, and no less than 5 places.

Inspection method: inspection by observation.

9.3.10 Installation of piping parts such as valves, gas collecting tank, automatic air exhaust unit, dirt separator (water filter) shall meet design requirement, and shall meet the following specifications:

1 Installed position of valve and its inlet and outlet direction shall be correct, and easy for operation; connection shall be fixed and tight, opening and closing flexible; arrangement of valves in row shall be neat and good-looking, allowable deflection at the same level is 3mm.

2 Automatic controlled valves such as electric-driven or air-driven, etc. shall be carried out commissioning of single test run before installation, including action test such as open and close.

3 Dirt separator (water filter) for refrigerating water and cooling water shall be installed at pipe before going to the machine unit, with correct direction and convenience for cleaning; the connection with pipe is fixed tightly, its installation position shall be convenient for removal, assembly and cleaning of filter screen. Material, specification and binding method of filter screen shall meet design requirement.

4 For piping of closed system, air exhaust valve shall be provided at the highest point of the system and all high points where air possibly accumulated, and drain pipe and water discharge valve shall be provided at the lowest point of piping.

Inspection quantity: random check 10% according to specification and model, and no less than 2 places.

Inspection method: inspection by dipstick metering, observation and operation against design documents.

9.3.11 Installation of cooling tower shall meet following specifications:

1 Foundation elevation shall meet specification of design, allowable error is ± 20mm. Connection or fixing of anchor bolts and embedded parts of cooling tower shall be tight, each connected part shall apply hot galvanized or stainless steel bolts, the tightening force shall be uniform and even.

2 Installation of cooling tower shall be level, allowable error of installation levelness and verticality of single piece of cooling tower is 2/1000. During installation of many cooling towers of the same cooling water system, floor height of each cooling tower shall be in uniform, the height difference shall not be more than 30mm.

3 Direction and position of water outlet and nozzle of cooling tower shall be correct, water collecting tray shall be tight without leakage; water distributor distribute water evenly. For cooling tower with rotating water distributor, the rotating part shall be flexible, water spray outlet shall be according to requirement of design or product, and the direction shall be the same.

4 Radial clearance between end of blade of air blower of cooling tower and surrounding of tower shall be even. For blade which angle can be adjusted, angle shall be in uniform.

Inspection quantity: fully inspected.

Inspection method: inspection by dipstick metering and observation. For water collecting tray, carry out water filling test or review test record.

9.3.12 Installation of water pump and accessory equipment shall meet following provisions:

1 Allowable error for plane position and elevation of water pump is ±10mm, anchor bolts installed shall be vertical, tightened, and in close contact with equipment base.

2 Pad group shall be placed steady, in correct position, with close contact, and each group shall not exceed 3 pieces.

3 For pumps installed, as a whole, longitudinal level deflection shall not be more than 0.1/1000, transverse level deflection shall not be more than 0.20/1000; for pump installed in disassembly status, transverse installation level deflection for all shall not be more than 0.05/1000.

When water pump and electric motor are connected by shaft couplings, for allowable deflection of two axes of shaft couplings, axial inclination shall not be more than 0.2/1000, radial displacement shall not be more than 0.05mm.

Small piping water pump installed as a whole shall not have obvious inclination.

4 Connection of vibration reducer and water pump and water pump foundation is fixed, steady and in close contact.

Inspection quantity: fully inspected.

Inspection method: trial twisting by spanner, inspection by observation, and measurement by use of level gauge and feeler gauge, or review of equipment installation record.

9.3.13 For installation of equipment such as water tank, water collecting sump, water separator and cold storage tank, size and position of their support or base meets design requirement. Equipment is in tight contact with support or base; its installation is right and tight. Allowable deflection of plane position is 15mm, allowable deflection of elevation is ±5mm, and allowable deflection of verticality is 1/1000.

Installation position of expansion water tank and connection of nozzle shall meet requirement of design document.

Inspection quantity: fully inspected.

Inspection method: inspection by dipstick metering and observation, stand at side or review test record.

10 Preservation and Thermal Insulation

10.1 General Provisions

10.1.1 Thermal insulation works of air duct and its accessory as well as air conditioner shall be done after tightness test of duct system.

10.1.2 Piping of refrigerating system of air conditioning works, including thermal insulation works of refrigerant system and water system, shall be constructed after pipeline system is qualified upon tensile test and tightness test and is subject to preservative treatment.

10.1.3 Plain thin steel plate should be applied with antirust paint before it is used for fabrication of air duct.

10.1.4 Preservative treatment of bracket and hanger shall be consistent with that of air duct or piping, with visible part applied with finishing coat.

10.1.5 Painting works shall be provided with fireproof, anti-frost and rain preventive measures and shall not be done at low temperature or humid conditions. Final pigmented paint of visible part should be applied after completion of installation.

10.2 Major Control Items

10.2.1 Thermal insulation of air duct and piping shall use incombustible or flame-resistant material, which shall meet the design requirements in terms of quality, density, specification and thickness. Flame-resistant material, if used, shall have its flame-resistant property inspected in advance.

Inspection quantity: to spot check one piece by batch

Inspection method: to observe, to check material’s certificate of compliance, and to perform ignition test.

10.2.2 Anticorrosive coating and paint must be qualified within their valid guarantee period.

Inspection quantity: to inspect by batch

Inspection method: to observe, and to check material’s certificate of compliance.

10.2.3 Incombustible material must be used for:

1. Air duct and insulation layer at 800mm distance back or forth of electric heater;

2. Air duct, piping and insulation layer within 2m crossing both sides of fire partition.

Inspection quantity: to check all.

Inspection method: to observe, to check material’s certificate of compliance and to perform ignition test.

10.2.4 When insulation material with non-closed pores is used for the pipe transporting medium with temperature lower than ambient air dew point, the vapor barrier (damp-proof course) must be complete and well sealed.

Inspection quantity: to spot check 10% by quantity, not less than 5.

Inspection method: to observe

10.2.5 Air duct and piping inside cleanliness room shall not use dust-producing material (for example glass fibre and short fibre mineral wool etc) for thermal insulation.

Inspection quantity: to check all

Inspection method: to observe

10.3 General Items

10.3.1 Paint shall be sprayed or brushed with uniform film, free of such defects as deposit, winkle, air pocket, adulteration, mixed color and omittance etc.

Inspection quantity: to spot check 10% by area.

Inspection method: to observe.

10.3.2 When air conditioner and its accessories are applied with paint either by spray or brush, due attention shall be paid to avoid covering of air conditioner’s nameplate and impacts of its accessories’ function and service.

Inspection quantity: to spot check 10% by quantity, not less than 2.

Inspection method: to observe

10.3.3 Operating function of air duct system shall not be influenced by thermal insulation of its accessories.

Inspection quantity: to spot check 10% by quantity, not less than 2.

Inspection method: to observe

10.3.4 Insulation material layer shall be compacted, free of any crack and void etc. Its surface shall be flat, with a permissible deviation of 5mm when coiled material or sheet material is used, or of 10mm when brush application or other method is adopted. Its damp-proof course (including ends of insulation layer) shall be complete and well sealed, with lap seams down stream.

Inspection quantity: to spot check 10% by axial length for pipes; 10% by quantity for accessories and valves, not less than 2.

Inspection method: to observe, to penetrate a wire into the insulation layer, to measure.

10.3.5 When insulation layer of air duct is fixed by means of cohesion, the following regulations shall be met:

1. Property of cohesive material shall be in compliance with service temperature and environmental hygiene, and shall match with insulation material;

2. Cohesive material should be applied uniformly on the outer surfaces of air duct, accessory or equipment. Insulation material shall have a close void-free integration with the surfaces of air duct, accessory and equipment;

3. Longitudinal and lateral seams of insulation layer shall be staggered;

4. If insulation layer is tied up or bundled up after adhesion, it shall be tied up with a uniform close lap seam, or bundled up with a proper tightness and without damage.

Inspection quantity: to spot check 10% by quantity.

Inspection method: to observe and to check material’s certificate of compliance.

10.3.6 When insulation layer is fixed by the use of insulation stud, the following regulations shall be met:

1. Insulation stud may be either bonded or welded to the surfaces of air duct, accessory and equipment. It shall be affixed firmly and shall not fall off. After welding, air duct shall be maintained flat and the anticorrosion property of galvanized steel plate shall not be impacted;

2. Rectangle insulation studs of air duct or equipment shall be distributed uniformly, with the quantity per square meter of not less than 16 pieces at bottom, 10 at side and 8 on top. The first line of insulation studs shall be less than 120mm far away from the edge of air duct or insulation material;

3. The thickness of insulation layer at the area of duct flange shall not be less than 0.8 times that of duct insulation layer;

4. Split joint of insulation material with damp-proof course and vapor barrier shall be sealed tightly with adhesive tape, which shall have a width of not less than 50mm and shall be firmly affixed to the damp-proof surface layer, without bursting and falling off.

Inspection quantity: to spot check 10% by quantity and not less than 5 positions.

Inspection method: to observe.

10.3.7 When used for insulation layer, insulation coating shall be applied layer by layer with uniform thickness, and free of air pocket and omittance etc. Surface hardening layer shall be smooth and firm, free of gap.

Inspection quantity: to spot check 10% by quantity.

Inspection method: to observe.

10.3.8 When glass fibre cloth is used for insulation protective layer, overlapping shall have a uniform width, better at 30—50mm and an adequate tightness.

Inspection quantity: to spot check 10% by quantity, and not less than 10m².

Inspection method: to measure, to observe.

10.3.9 Insulation structure at the areas of piping, valve, filter and flange shall be able to be dismantled separately.

Inspection quantity: to spot check 10% by quantity, and not less than 5.

Inspection method: to observe.

10.3.10 Insulation layer of pipe shall be constructed in accordance with the following regulations:

1. Insulation product shall have material and specification in compliance with design requirements and shall be firmly affixed, flatly laid, and tightly banded on pipe shell, free of slippage, looseness and rupture.

2. Split joint on hard or semi-hard insulation shell shall not be larger than 5mm for thermal insulation, 2mm for cold insulation, and shall be filled with adhesive material. Longitudinal joints shall be staggered, and horizontal joints on outer layer shall be located at lower part of one side. When insulation is more than 100mm in thickness, it shall be laid layer by layer, with in-between joints pressed;

3. Hard or semi-hard insulation shell shall be bundled up with metal wire or corrosion assistant meshbelt, with the space of 300-350mm and at least 2 circles per section.

4. Loose or soft insulation material shall be evenly compressed to its specified density. When pipe is tied up with felt material, gap shall be prevented at lap seam.

Inspection quantity: to spot check 10% by quantity, and not less than 10 pieces.

Inspection method: to measure, to observe, and to consult construction records.

10.3.11 Damp-proof course of pipe shall be constructed according to the following regulations:

1. Damp-proof course shall be closely affixed to insulation layer and well sealed, and shall be free of such defects as falseness, air pocket, winkle and crack etc.

2. Damp-proof course of standpipe shall be installed from lower end to higher end. Circular lap seam shall face down to lower end. Longitudinal lap seam shall be located at the side of pipe and down stream.

3. When damp-proof course of coiled material is constructed by means of spiral winding, the overlapping width of coiled material should be 30-50mm;

Inspection quantity: to spot check 10% by quantity, and not less than 10m.

Inspection method: to measure, to observe.

10.3.12 Construction of metallic shield shall meet the following regulations:

1. Metallic shield shall be clung to insulation layer, without falling-off, wrinkle and forced interface etc. Interface overlapping with the length of 20-25mm shall be down stream and shall be reinforced with raised rebar. When tapping screws are used, they shall have equal space and shall not break damp-proof course.

2. Longitudinal and lateral joints of outdoor metallic shield shall be down stream, and its longitudinal joint shall be located at one side of pipe. Flashing shall be provided at the interface between metallic shield and outer wall or roof.

Inspection quantity: to spot check 10% by quantity.

Inspection method: to observe.

10.3.13 Piping of refrigerating system inside cold or heat source house shall have color marks on its external surface.

Inspection quantity: to spot check 10% by quantity.

Inspection method: to observe.

11 System Commissioning

11.1 General Provisions

11.1.1 Test apparatus and instruments used for system commissioning shall have reliable and stable performance, with precision grade and the minimum scale division satisfying the required measurement and meeting the relevant China national stipulations in metering code and calibration regulation.

11.1.2 System commissioning of ventilation works and air-conditioning works shall be taken charge of by construction contractor, under monitoring of supervisor, and with involvement and cooperation of designer and client. It can be carried out either by the construction contractor itself or by other competent unit entrusted by the construction contractor.

11.1.3 Prior to system commissioning, general contractor shall prepare the relevant scheme and submit it to specialized supervising engineer for review and approval. After completion of commissioning, relevant documents and reports shall be provided in complete.

11.1.4 Interlock test-run and commissioning of ventilation system and air conditioning system at zero production load shall be carried out after successful single test-run of refrigerating unit, ventilation unit and air conditioning unit. Normal interlock test-run of air conditioning system with cold (hot) source shall not last for less than 8h. When construction is finally completed during the season with environmental conditions differing a lot from the design, test-run without cold (hot) source shall be done only. Continuous test-run of ventilation system and dust removal system shall not last for less than 2h.

11.1.5 Prior to running, air cleaning system shall be protected by installation of temporary filters at the suctions of return air and fresh air as well as before primary filter and secondary filter, if without woven cloth etc. Air cleaning system shall be tested and adjusted after being cleaned up completely and getting stable after at least 24h operation.

Air cleanliness inside cleanliness room shall be checked at as-built or at-rest condition or according to the contract regulation, with participation of not more than 3 people who must wear clean working clothes adaptable to air cleanliness class inside.

11.2 Major Control Items

11.2.1 After completion of ventilation works and air conditioning works, system measurement and adjustment (to be called shortly as commissioning) must be done, including:

1. Single test-run and testing of equipment;

2. Interlock test-run and commissioning of system at zero production load.

Inspection quantity: to check all.

Inspection method: to observe, to stand by, and to consult test records.

11.2.2 Single test-run and commissioning of equipment shall meet the following stipulations:

1. For the fan of ventilator and air conditioning unit, its vane wheel shall rotate in a correct direction and run smoothly, without abnormal vibration and sound; its motor shall have an operating power in compliance with equipment’s technical document. After 2h continuous running at rated speed, the highest temperature shall not exceed 70 ^oC for sliding bearing housing, and 80^oC for rolling bearing housing;

2. For water pump, its impeller shall rotate in a correct direction, without abnormal vibration and sound; its fasteners shall not loosen; its motor shall have an operating power in compliance with equipment’s technical document. After 2h continuous running, the highest temperature shall not exceed 70 ^oC for sliding bearing housing, and 75 ^oC for rolling bearing housing;

3. Cooling tower body shall be installed firmly, without abnormal vibration; and its noise shall meet the stipulation in equipment’s technical document. Test-run of fan shall be performed in accordance with item 1 of 11.2.2:

Fan and cooling water system of cooling tower shall be in cycling test-run for at least 2h, without occurrence of any abnormity;

4. Refrigerating set and unit air conditioning set shall be in test-run pursuant to equipment’s technical document and the relevant stipulations in the current national standard GB50274 “Code for Construction and Acceptance of Refrigerating Unit and Air Separation Unit”, with at least 8h of normal operation;

5. Electric control air damper for prevention of fire and fume evacuation shall be in flexible reliable operation manually or electrically, with a correct signal output.

Inspection quantity: for item 1, to spot check 10% by the quantity of fans and not less than 1; for items 2, 3, 4, to check all; for item 5, to spot check 20% by the quantity of fans in the whole system and not less than 5.

Inspection method: to observe, to stand by, and to detect with a sound level meter, to consult test-run records and the relevant documents.

11.2.3 Interlock test-run and commissioning of the system at zero production load shall meet the following stipulations:

1. Test result of total air volume of the system shall not have a deviation of more than 10% from the design value;

2. Test result of total flow of cold water, hot water and cooling water for air conditioning system shall not have a deviation of more than 10% from the design value;

3. Air conditioner shall have comfortable temperature and relative humidity in compliance with design requirements. Air temperature and relative humidity as well as their fluctuant scope in a room with constant temperature and humidity shall meet design specifications.

Inspection quantity: to spot check 10% by the quantity of duct system, and not less than 1.

Inspection method: to observe, to stand by, and to consult test records.

11.2.4 Results of interlock test-run and commissioning of fume prevention system (air volume and positive pressure) must be in compliance with the design and firefighting stipulations.

Inspection quantity: to spot check 10% by total amount, and not less than 2 floors.

Inspection method: to observe, to stand by, and to consult test results.

11.2.5 Air cleaning system shall also meet the following stipulations:

1. Permissible deviation for test result of total air volume of uniflow cleanliness room system from the design value is 0—20%. Permissible deviation for air volume at each air port indoor from the design value shall be 15%.

2. Permissible deviation for indoor sectional average air speed of uniflow cleanliness room system shall be 0—20%, and unevenness of sectional air speed shall not exceed 0.25.

Permissible deviation of fresh air volume from the design value is 10%.

3. Static pressure difference between two adjacent rooms with different cleanliness class as well as between cleanliness room and non-cleanliness room shall not be less than 5 Pa, while static pressure between cleanliness room and outdoor shall not be less than 10 Pa;

4. Indoor air cleanliness must meet the class specified by the design or the class as required by the agreed conditions for acceptance.

For uniflow cleanliness room of class 5 or above, dust concentration in air at indoor working height measured 0.5 m far away from the open door shall not exceed the value specified by the upper limit of indoor cleanliness class.

Inspection quantity: to check all the test records, to spot check 5% measuring points, not less than 1 point.

Inspection method: to check and verify test records, and to test and verify in accordance with Annex B of this Specification.

11.3 General Items

11.3.1 Single test-run and commissioning of equipment shall conform to the following stipulations:

1. During running, water pump shall not have abnormal vibration and sound, its casing seal shall be free of leakage, its fasteners shall not get loose and its shaft seal shall have a normal temperature rise. Without special requirement, leakage shall not be more than 60mL/h for common packing, and 5mL/h for mechanical seal;

2. Noise caused during running of fan, air conditioning set and air cooling/heating pump etc should not exceed the specified value in product performance instruction manual;

3. 3-speed switch and temperature-controlled switch of fan coil set shall act properly in correspondence to operating status of fan coil set.

Inspection quantity: for item 1, 2, to spot check 20%, not less than 1 piece; for item 3, to spot check 10%, not less than 5 pieces.

Inspection method: to observe, to stand by, and to consult test-run records.

11.3.2 Interlock test-run and commissioning of ventilation system at zero production load shall meet the following stipulations:

1. During system interlock test-run, equipment and main parts shall interlock pursuant to the design requirement, with harmonious and correct actions and without abnormity;

2. After balance adjustment to the system, the permissible deviation of air volume at each port or suspended hood from the design value shall not be more than 15%;

3. Water supply system and water drainage system of wet dust collector shall operate normally.

11.3.3 Interlock test-run and commissioning of air conditioning system at zero production load shall also meet the following stipulations:

1. For air conditioning works, its water system shall be flushed clean, free of impurities, and its piping system shall be removed of air. It shall be in continuous operation normally and stably. The pressure of water pump and the current of motor shall not fluctuate sharply. After balance adjustment to the system, water flow of each air conditioning set shall meet the design requirement, with a permissible deviation of 20%;

2. Each automatic measuring and detecting element and actuator shall be in normal operation, and meet the requirements of building equipment automation (BA, FA etc) system on detection and control of the measured parameters;

3. When several cooling towers are in parallel operation, water intake and output of each tower shall be in equilibrium and consistency;

4. Noise inside air conditioning room shall meet the design specification

5. Pressure difference between rooms and halls required with differential pressure and other adjacent rooms shall have a positive value of 0—25 Pa for comfortable air-conditioning; and shall meet the design specification for process air-conditioning

6. At the area where there is limitation for ambient noise, refrigerating set and air conditioning set shall be subject to noise measurement in accordance with the current national standard GB9068 “Measurement of Noise Acoustic Power Level of HVAC Equipment—Engineering Law”. Noise inside cleanliness room shall meet the design specification.

Inspection quantity: to spot check 10% by the quantity of system, and not less than 1 system or 1 room.

Inspection method: to observe, to use instrument for measurement and inspection, and to consult test records.

11.3.4 Control and monitoring devices of ventilation and air conditioning works shall be capable of normal communication with the system’s detecting element and actuator, with a correct indication of system status parameters and proper functions of interlocking, automatic adjustment and automatic protection.

Inspection quantity: to spot check 30% by the total amount of system of monitoring system, not less than 1 system.

Inspection method: to stand by for observation, and to consult test records.

12 Final Acceptance

12.0.1 On precondition of efficient supervision of project execution quality, final acceptances of ventilation works and air-conditioning works are intended for transferring of qualified work pieces by the construction contractor to the client in accordance with this Specification, af, ter interlock test-run and commissioning at zero production load and visual quality inspection of all work pieces.

12.0.2 Final acceptance of ventilation works and air-conditioning works shall be taken charge of by the client and jointly carried out by construction contractor, designer and supervisor etc. And final acceptance formalities shall be gone through upon its conformity.

12.0.3 Final acceptance documents shall be checked during final acceptance of ventilation works and air-conditioning works, normally including the documents and records as follows:

1. Joint check-up records of drawings, design change notice and as-built drawings;

2. Ex-works conformity certificates and mobilization inspection (test) reports of major materials, equipment, final products, semi products and instruments;

3. Records of inspection and acceptance of concealed works;

4. Records of installation and inspection of equipment, air duct system and piping system;

5. Test records of pipes;

6. Single test-run records of equipment;

7. Records of interlock test-run and commissioning of system at zero production load;

8. Quality acceptance records of work piece (sub-work piece);

9. Comprehensive inspection records of visual quality.

10. Verification records of test documents of safety and function.

12.0.4 Visual quality inspection shall include:

1. Duct surface shall be flat and free of damage; pipes shall be connected reasonably, without obvious defects for connection of air duct as well as for connection of air duct with equipment or regulating device;

2. Air port shall have a flat surface with consistent color and shall be positioned correctly. Its adjustable parts shall be capable of normal action;

3. All regulating devices shall be fabricated and installed properly and firmly for flexible adjustment and convenient operation. Air dampers for prevention of fire and fume exhaustion etc shall be closed tightly and have reliable actions;

4. Pipes, valves and instruments of refrigerating and water piping system shall be positioned correctly; the system shall be free of leakage;

5. Types, locations and spacing of brackets and hangers for air duct, accessory and pipe shall meet the requirements of this Specification;

6. Flexible nipples of air duct and pipe shall be positioned in compliance with the design requirement, shall be installed correctly and firmly, without forced but natural torque;

7. Coil sets of ventilation unit, refrigerating unit, water pump and fan shall be installed correctly and firmly;

8. Assembling air conditioning set shall have a flat smooth appearance and tight joint seams, shall be assembled in a correct sequence, and its water spraying chamber shall have a leakage-free outer surface;

9. Dust collector and dust settling chamber shall be installed firmly, with tight interfaces;

10. Silencer shall be positioned properly. Its outer surface shall be flat and free of damage;

11. Paints of air duct, accessory, pipe and bracket shall be affixed firmly, with film in uniform thickness and with color and sign in compliance with design requirements;

12. Insulation layer shall have material and thickness in conformity to design requirements, and its surface shall be flat, free of rupture and falling-off. Outdoor moisture barrier or shield shall be overlapped down stream and free of leakage.

Inspection quantity: for air duct and pipe, to spot check 10% each by system, and not less than 1 system; for various accessories, valves and instruments, to spot check 5%, and not less than 10 pieces.

Inspection method: to measure, to observe.

12.0.5 Visual quality inspection of air cleaning system shall also include:

1. Air conditioning set, fan, air cleaning set, fan filter unit and air blow chamber etc shall be positioned properly, fastened firmly and connected tightly, with a deviation in compliance with the relevant articles of this Specification;

2. Connections between high efficiency filter and air duct as well as between air duct and equipment shall be sealed reliably;

3. Air cleaning set, hydrostatic box, air duct and air feed/return ports shall be clean without accumulated dust;

4. Interior wall, suspended ceiling and floor of assembling cleanliness room shall be smooth, flat, with uniform color and dustless. Static electricity of floor shall be less than design value;

5. Sealing shall be provided reliably and tightly at the positions where air feed/return ports, various terminals and various pipes etc are connected with interior surface of cleanliness room.

Inspection quantity: to spot check 20% by quantity, not less than 1.

Inspection method: to measure, to observe.

13 Measurement and Adjustment of Comprehensive Efficiency

13.0.1 Prior to handing over of ventilation works and air-conditioning works, measurement and adjustment shall be made to system comprehensive efficiency at production load.

13.0.2 Measurement and adjustment of comprehensive efficiency of ventilation works and air-conditioning works at production load shall be carried out with the readiness of commissioning conditions, and shall be taken charge of by the client, with cooperation of designer and construction contractor.

13.0.3 Items to be measured and adjusted by comprehensive efficiency test of ventilation system and air-conditioning system at production load shall be defined by the client according to project characteristics, process and design requirements.

13.0.4 Comprehensive efficiency test of ventilation system and dust removal system may include the following items:

1. Measurements of dust concentration or poisonous gas concentration in room air and their emission concentration;

2. Measurement of air flow characteristics at the mouth of suspended hood;

3. Measurement of resistance and dust removal efficiency of dust collector;

4. Measurement of purification efficiency of filtering unit for air fume and acid mist;

13.0.5 Comprehensive efficiency test of air conditioning system may include the following items:

1. Measurement and adjustment of air status parameters at air feed/return ports;

2. Measurement and adjustment of performance parameters of air conditioning set;

3. Measurement of room noise;

4. Measurement and adjustment of room air temperature and relative humidity;

5. Measurement of airflow speed for air conditioning area having special requirement for airflow.

13.0.6 In addition to its comprehensive efficiency test items, air conditioning system with constant temperature and humidity may include the following additional test items:

1. Measurement and adjustment of room static pressure;

2. Measurement and adjustment of performance of all functional zones in air conditioning set;

3. Measurement and adjustment f room temperature and relative humidity;

4. Measurement of room airflow distribution.

13.0.7 In addition to comprehensive efficiency test items for air conditioning system with constant temperature and humidity, air cleaning system may include the following additional test items:

1. Measurement of room air cleanliness class at the condition of production load;

2. Measurement of room buoyant bacteria and settling bacteria;

3. Measurement of room self-purification time;

4. In addition to comprehensive efficiency test items of air cleaning system, cleanliness room with its air cleanliness class of above 5 shall have specific additional test items for control of equipment leakage and prevention of pollutant diffusion etc;

5. Cleanliness room with its air cleanliness class of 5 or above may have the uniflow streamline parallelism measured. Within work area, deflection of air flow direction from the specified direction shall not exceed 15^o

13.0.8 Comprehensive efficiency test items of fume prevention system refer to measurement of positive pressure variation and test of fume diffusion etc in safe area at simulated condition.

13.0.9 Unit and status of comprehensive efficiency test of air cleaning system should be defined through negotiation by client, designer and construction contractor.

Appendix A Air Leak Check with Lighting and Air Leakage Rate Test

A.1 Air Leak Check with Lighting

A.1.1 Air leak check is used for checking the closeness of the air duct of the system by utilizing strong penetration of the lighting on the hole.

A.1.2 The safe lighting sources with certain intensity shall be used for check. Removable lighting resources held by hand can adopt the low-voltage illuminating lamp not less than 100W in capacity with protective cover or other low-voltage lamps.

A.1.3 When the air system is checked for its air leak, the lighting resources can be located inside or outside of the air duct, whatever the location is, its opposite side shall be dark. Lighting resource for check shall slowly move along the seam to be checked while people shall observe the result at the other side. When light ray is identified, it is concluded that air leakage exists. Make all records.

A.1.4 The air duct of the system should be checked section by section and analyzed as a whole. Based on the rigid quality control on installation work, air system check is primarily carried out on air duct header and main air duct. When the closeness of the system is checked by lighting, the lighting leak less than 2 locations per 10m, and that less than 16 locations per 100m for low-pressure air duct can be deemed acceptable. The lighting leak less than 1 location per 10m and that less than 8 locations per 100m for medium-pressure air duct can be deemed acceptable.

A.1.5 The strip lighting leak found during the air leak check with lighting shall be sealed.

A.2 Testing Device

A.2.1 Dedicated and acceptable measuring apparatus shall be used for air leak rate test. Or measuring devices assembled by metering components as specified in the current national standard “throttling devices for flow measurement” can be adopted.

A.2.2 The measuring device for air leak rate test can adopt the type of air duct or air chamber. Air duct testing device adopts orifices as its meting components and air chamber testing device adopts nozzles as its metering components.

A.2.3 The air pressure and air rate for the air fan of air leak rate test devices shall be more than 1.2 times of the specified test pressure and the maximum allowable air leak rate of the system or equipment to be measured respectively.

A.2.4 The test pressure of the air leak rate test device can be adjusted by adjusting the fan’s rotation speed, or controlling the openess of the throttling device. Air leak rate must be measured after the system has been adjusted and maintained the stable pressure.

A.2.5 The differential pressure of the air leak test device shall be measured by using micro pressure gauge, the minimum readout between scales of the gauge shall be less than 2.0Pa.

A.2.6 Air Duct type of the test device for testing air leakage rate

1. The air leak test device of the air duct type consists of fan, connected air duct, pressure gauge, flow straightener, flow restrictors (figure A.2.6-1).

Figure A.2.6-1 Air Leak Rate Test Device with Positive-Pressure Air Duct

2. This device adopts the standard orifice with pressure-taking joints on the orifice ends. b value range of the orifice is 0.22-0.7 (b=d/D). The distance between the orifice and upstream and downstream flow straightener and the spool outside the flow straightener shall comply with stipulations of more than 10 times and more than 5 times of the pipe diameter D respectively.

3. The connected air ducts of this device shall be smooth round ducts. The roundness allowable deviation of which in the range of 2D upstream from the orifice shall be 0.3% and 2% for 2 downstream from the orifice.

4. The orifice is connected with the air duct, the allowable deviation of the perpendicularity between the orifice front end and the duct axial line shall be1°, and the allowable deviation of the concentricity between the orifice and the air duct shall be 0.015D.

5. All connections downstream the primary flow straightener shall be tight without leakage.

6. The following formula is used to calculate the air leak rate:

(A.2.6)

Q = Air leak rate (m3/h);

e = Expansion coefficient of the air flow bundle

a = The flow coefficient of the orifice.

= The area of the hole of the orifice (m2);

r = The air density (Kg/m3)

= Differential pressure of the orifice (Pa).

7. The relation between the flow coefficient of the orifice and b value can be determined according to the drawing A.2.6-2, the application range of which shall satisfy the following conditions, not considering the impact of the duct roughness on the flow coefficient.

10⁵ <R_e <2.0X10⁶

0.05<b²?0.49

50mm<D?1000mm

When Reynolds number is less than 10⁵, the flow coefficient a shall be calculated according to the current national standard “flow measuring and restriction device”

Figure A.2.6-2 Orifice Flow Coefficient Drawing

8. The air flow bundle expansion coefficient e of the orifice can be referred according to the table A.2.6.

TableA.2.6 expansion coefficient e of the flow bundle for the standard orifice with pressure –taking joints on both orifice ends.

P₂/P_l b⁴	1.0	0.98	0.96	0.94	0.92	0.90	0.85	0.80	0.75
0.08	1.0000	0.9930	0.9866	0.9603	0.9742	0.9681	0.9531	0.9381	0.9232
0.1	1.0000	0.9924	0.9854	0.9787	0.9720	0.9654	0.9491	0.9328	0.9166
0.2	1.0000	0.9918	0.9843	0.9770	0.9698	0.9627	0.9450	0.9275	0.9100
0.3	1.0000	0.9912	0.9831	0.9753	0.9675	0.9599	0.9410	0.9222	0.9034
Notes: 1. Values within this range can be added, but values exceeding this range are not allowed. 2. P₂/P_l is full pressure ratio between upstream and downstream of the orifice.

9. When air leak rate is tested for the system or equipment under the negative pressure, the connection of the device shall meet stipulations set forth in figure A.2.6-3:

Figure A.2.6-3 Air leak test device with negative pressure air duct

A.2.7 Air Chamber type of air leak rate test device:

1. Air chamber type of air leak rate test device consists of fan, connected air duct, pressure gauge, uniform flow plate, flow restrictor, air chamber, isolation plate, and nozzle as shown in the figure A.3.7-1.

2. The standard long-neck nozzle is used for the test device (figure A.2.7-2). The nozzle must be mounted on the isolation plate as required in the figure A.2.7-1, there could be one nozzle or many nozzles. The distance between the center of the two nozzles mustn’t be less than 3 times of the larger nozzle’s throat diameter. The distance between the center of any nozzles and the nearest side wall of the air chamber mustn’t be less than 1.5 times of the nozzle’s throat diameter.

3. The section area of the air chamber shall not be less than the section area corresponding to the air rate to be measured of 0.75m/a. the installation location of the flow uniform plate in the air chamber (multi-hole plate) shall meet stipulations as specified in figure A.2.7.1.

Figure A.2.7-1 Air Leak test device with positive pressure air chamber

Ds—diameter of small nozzle D_m—diameter of medium nozzle D_L—diameter of large nozzle

Figure A.2.7-2 standard long neck nozzle

4. The static pressure-taking joints on both ends of the nozzle inside the air chamber shall be many joints and located uniformly on around the wall. The distance between the static pressure-taking joint and the nozzle isolation plate shall be less than 1.5 times of the throat diameter of the minimum nozzle. The joints then are connected in parallel to form the static pressure ring and connected with the pressure gauge.

5. When this device is adopted to measure the air leak rate, the flow velocity through the nozzle throat shall be controlled to 15-35m/s.

6. All connection parts downstream of the nozzle’s isolation plate in the air chamber must be tight without leakage.

7. The air rate of the individual nozzle can be calculated according to the following equation:

(A.2.7-1)

Air rate of many nozzles: Q=SQ_n (A.2.7-2)

Q_n----Air leak rate of the individual nozzle (m3/h)

----The flow coefficient of the nozzle (0.99 is taken when the nozzle diameter is more than 127mm, when less than 127mm, the figure can be taken from the table A.2.7 or figure A.2.7-3).

----The throat area of the nozzle (m2)

----Static differential pressure upstream and downstream of he nozzle (Pa).

Table A.2.7 The flow coefficient of the nozzle

Re	Flow coefficient C_d	Re	Flow coefficient C_d	Re	Flow coefficient C_d	Re	Flow coefficient C_d
12000	0.950	40000	0.973	80000	0.983	200000	0.991
16000	0.956	50000	0.977	90000	0.984	250000	0.993
20000	0.961	60000	0.979	100000	0.985	300000	0.994
30000	0.969	70000	0.981	150000	0.989	350000	0.994
Note: The temperature coefficient is not taken into consideration

8.
When the air leak rate is measured for the system or equipment under the negative pressure condition, the connection of the device shall meet stipulations in figure A.2.7-4.

Figure A.2.7-3 Calculation drawing for the flow coefficient of the nozzle

Note: first use diameter and temperature scale to obtain figure point in the index scale (X), then connect the index scale point and the pressure scale point to obtain the flow coefficient.

Figure A.2.7.4 Air Leak Test Device with Negative Pressure Air Chamber

A.3 Air Leakage Rate Test

A.3.1 The air leakage rate test for air duct and equipment of the positive or negative pressure system consists of the positive pressure and negative pressure test. Generally the test under the positive pressure condition can be adopted.

A.3.2 The air leakage rate test of the system can be carried out as a whole or in stages. During the test, all openness of the system to be tested shall be closed without air leakage.

A.3.3 If the air leakage rate of the system being tested exceeds the range set forth in the design and this specification, the air leakage position shall be detected (by the method of listening, feeling, observation, or using water and smoke to detect) and marks shall be made on them. After the leakage is repaired, the system shall be re-tested until it is deemed acceptable.

A.3.4 The air leakage rate shall generally be the actual values measured under the specified test pressure. In special conditions, it can be tested under the pressure approximate or more than specified pressure, and the air leakage rate can be calculated as per the following equation:

(A.3.4)

P₀ =The specified test pressure, 500Pa;

Q₀ =the air leakage rate under the specific test pressure [m3/(h.m2)]

P =the working pressure of the air duct (Pa)

Q =the air leakage rate under the working pressure [m3/(h.m2)]

Appendix B Test Measures for the Clean Chamber

B.1 The test for air rate or air speed

B.1.1 For the clean chamber of one way flow, the air supply rate shall be defined by the average air speed of the chamber section multiplying the section area. The section that is perpendicular to the airflow and 0.3m from the hi-effective filter is taken as the test section. The distance of test points on the section should be less than 0.6m, and the test points should be more than 5, the arithmetic average value of the air speed readout of all test points is considered as the average air speed.

B.1.2 For the clean chamber of multi-way flow, the following “damper” or “air duct” measures are used to define the air supply rate:

1. “Damper method” means the measurement shall be performed on the damper where the high efficient filter is installed, with the auxiliary air duct connected according to the damper shape. I.e. the straight spool made from galvanized steel plate or other material not producing dust with the same shape and inner section as the damper, and two times of the longer side of the damper in length is connected to the outside of the damper. At least no less than 6 test points shall be uniformly arranged on the outlet surface of the auxiliary air duct. Use the hot-ball type of the anemoscope to measure the air speed of each test point. Then the air rate can be obtained by average air speed of the damper section multiplying the damper net section area.

2. The “air duct” method could be used to measure the air rate if there is long spool outside the windward of the damper and the spool has already been drilled or is ready to be drilled. The section to be measured shall locate on the position where 3 times of the duct diameter or longer side upstream of the resistant component, and 5 times of the duct diameter or longer side downstream of the resistant components is reached.

For rectangle air duct, the section to be measured is divided into some small sections with equal area, each small section is approximate to the square with side length less than 200mm. The test points shall be located in the center of the small sections, but the test point number of the whole section should not be less than 3.

For round air duct, the section shall be divided into some concentric rings with equal area according to the pipe diameter, four points shall be tested for each ring. The ring number shall be determined according to the pipe diameter, but shouldn’t be less than 3.

B.2 Check on Static Differential Pressure

B.2.1 The static differential pressure shall be measured from high pressure to low pressure under the condition that all doors must be closed, starting from the room which are furthest from the outside to the room near the outside in turn.

B.2.2 The sensitivity of the differential pressure gauge used for the test shouldn’t be less than 2.0P_{G .}

B.2.3 For adjacent clean rooms of different grade connected by holes, there should be reasonable air flow direction at the hole. The hot bulb anemoscope can be used for check when the average air velocity is more than or equal 0.2m/s.

B.3 Test on Air Filter Leakage

B.3.1 The leak test for high efficient filter shall adopt the optical particle counter with the speed more than 1L/min. D type high efficient filter should use laser particle counter or coagulation particle counter.

B.3.2 When the particle counter is used to check high efficient filter, the uniform concentration atmosphere or other sol dust shall be introduced in the windward of the filter. For particles equal or more than 0.5mm, the concentration shall be equal or more than 3.5X10⁵pc/m3; for particles equal or more than 0.1mm, the concentration shall be equal or more than 3.5X10⁷pc/m3. If D type of the high efficient filter is checked, for particles equal or more than 0.1mm, the concentration shall be equal or more than 3.5X10⁹pc/m3.

B.3.3 Scan method shall be used to check high efficient filters, i.e. on the leeward of the filter, place the equal dynamic sampling head of the particle counter on the position 20-30mm from the part to be checked to scan the surface, side frame and the head sealing of the filter at the speed of 5-20mm/s.

B.3.4 The leakage rate shall be checked under the approximate design air speed. Convert the leakage air concentration measured at the leeward of the high efficient filter to be checked to the transmissibility. The transmissibility of the high efficient filter mustn’t be more than 2 times of the ex-work acceptable transmissibility, and that of D filter mustn’t be more than 3 times of the ex-work acceptable transmissibility.

B.3.5 During the movable scan check, the position where values being checked suddenly rise should be specially checked.

B.4 Check on the cleanness grade of the indoor air

B.4.1 The cleanness grade of the air shall be checked under the status as specified in the design (empty, static and dynamic status).

B.4.2 Selection of the detector. The optical particle counter with the sampling speed ratio more than 11./min shall be used. When the detector is selected, the particle identification ability, particle application range and counting efficiency of the detector shall be considered. The detector shall have valid certificate.

B.4.3 Requirement on the sampling point:

1. The minimum sampling point number N_L is specified in the table B.4.3

Table B.4.3 The minimum sampling point number N_L

Test number N_L	2	3	4	5	6	7	8	9	10
Cleanness areaA(m3)	2.1-6.0	6.1-12.0	12.1-20.0	20.1-30.0	30.1-42.0	42.1-56.0	56.1-72.0	72.1-90.0	90.1-110.0
Note: 1. When air flows in a horizontal one-way direction, the section A is the section area of the flowing air perpendicular with the air flowing direction. 2. The minimum sampling point N_L is calculated as per the equation (round-off integer).

2. The sampling points shall be uniformly distributed in the whole section, and located on the section (0.8 m above the slab), or positions designated by the design institute or the owner.

B.4.4 Determination on the sample quantity:

1. The minimum sample quantity for each sampling is specified in the table B.4.4

Table B.4.4 The minimum sample quantity Vs(L) for each sampling

Cleanness grade	Granularity (mm)
Cleanness grade	0.1	0.2	0.3	0.5	1.0	5.0
1	2000	8400	-	-	-	-
2	200	840	1960	5680	-	-
3	20	84	196	568	2400	-
4	3	8	20	57	240	-
5	2	2	2	6	24	580
6	, 2	2	2	2	2	58
7	-	-	-	2	2	7
8	-	-	-	2	2	2
9	-	-	-	2	2	2

2. The minimum sampling time for each sample point shall be 1min, the sample quantity shall be 2L at least.

3. Each clean chamber (area) shall be sampled at least 3 times. When there is only one sample point in the clean area, then this point shall be sampled at least 3 times.

4. For area with expected air cleanness grade of IV grade or more and very large sample quantity is needed, the sampling sequence specified in the attachment F of ISO 14644—1 can be adopted.

B.4.5 Requirements for sampling check

1. The air velocity of the sampling point shall be near the design indoor air velocity as much possible.

2. The sampling tube of the particle counter for one-way flow clean room shall face toward the air direction. That for multi-way flow clean room should be upward.

3. The sampling tube must be clean with no leakage on its connection. The length of the sampling tube shall be in the allowable range. If no requirements are imposed to the length of the tube, it should be less than 1.5m.

4. The indoor personnel performing the test must wear the clean working uniform and should be fewer than 3 people. The people should be far from or locate at the leeward of the sample point, standing still or slightly moving.

B.4.6. Record the data and make analysis. During the test of the air cleanness degree, when the test point of the whole chamber (area) are 2-9, the average particle concentration Ci for each sample point and the average particle concentration N for all sample points must be calculated, thus obtaining 95% believable upper limit value. When the sample points exceed 9, the arithmetic average value can be taken as the believable upper limit value.

1. The average particle concentration Ci for each sample point shall be less than or equal the limit value as specified of the cleanness grade, see table B.4.6-1.

Table B.4.6-1 cleanness grade and floating particle concentration limit value

Cleanness grade	The max. concentration C₀ for the particle equal or larger than D in the list (pc/m3)
Cleanness grade	0.1mm	0.2mm	0.3mm	0.5mm	1.0mm	5.0mm
1	10	2	-	-	-	-
2	100	24	10	4	-	-
3	1000	237	102	35	8	-
4	10000	2370	1020	352	83	-
5	100000	23700	10200	3520	832	29
6	1000000	237000	102000	35200	8320	293
7	-	-	-	352000	83200	2930
8	-	-	-	3520000	832000	29300
9	-	-	-	35200000	8320000	293000
Note: 1. This table only shows the integer Max. concentration limit value of the floating particle for the cleanness grade (N). 2. For non-integer cleanness grade, the max. concentration limit value (Cn) corresponding to the particle dimension D(mm) is calculated as per 3. The cleanness is graded with the range of the particle diameter of 0.1-5.0mm, the particle number for grading should be less than 3, and the grade difference in sequence of the particle diameter shall be more than 1.5 times.

2. 95% believable upper limit value of the average particle concentration N for all sample points shall be less or equal the limit value as specified in the cleanness grade, i.e.

? limit value as specified in the grade

N—average dust concentration of each test point in the chamber,

n—test point number

s—standard difference of the average dust concentration N of each test point in the chamber,

t—the distribution coefficient of the single-side t is specified in table B.4.6-2 when the upper limit of the confidence level is 95%.

Table B.4.6-2 coefficient of t

numbers	2	3	4	5	6	7-9
1	6.3	2.9	2.4	2.1	2.0	1.9

B.4.7 Notes shall be taken for each test, and the performance test report or non-conformity report shall be submitted. The content of the test report shall consist of the following content:

1. The name and address of the test institute.

2. Test date and inspector’s signature.

3. Number of the standard executed and effective date of the standard.

4. The address, specified number of the sampling point and the coordinate drawing for the clean chamber or clean area to be tested.

5. The air cleanness grade for the clean chamber or clean area to be tested, diameter of particle (or settled or floating bacteria), status of the clean chamber, and the air flow pattern and static differential pressure.

6. The number and the certificate of the test apparatus, test method and the special situation during the test.

7. The test result includes the concentration of all particles (or settled and floating bacteria) for sampling points indicated in the coordinate drawing.

8. Abnormal data shall be explained and made data treatment.

B.5 Check for the floating and settled bacteria in the chamber

B.5.1 The method for microorganism check consists of floating and settled microorganism check. The sample chip or petri dish shall be put into the constant temperature cabinet at 37°C, after 48 hours, the number of the bacteria shall be counted. The sampling petri dish and liquor must be sterilized. The sampling points can be uniformly distributed or set at the symbolic area.

B.5.2 The floating microorganism can be sampled by the collision apparatus of centrifugal, slit, and pinhole type. The sampling time shall be determined by the concentration of the microorganism in the air. The sampling points can be identical to that of the air cleanness check points. Various apparatus for taking samples shall be used according to the instructions.

The settled microorganism shall be taken by using the petri dish with diameter of 90mm after the bacterial is settled 30min at the sampling point. The min. sample quantity in the petri dish shall meet stipulations set forth in the table B.5.3.

B.5.3 The floating and settled bacteria in the clean room (including biological clean room) of the pharmaceutical plant can also be sampled as per the agreed sampling plan.

Table B.5.2 The min. petri dish quantity

Air cleanness grade	Quantity of petri dish
<5	44
5	14
6	5
37	2

B.5.4 The following stipulations shall also be met if the petri dish is use to measure the settled bacteria, the collision apparatus or the filter type apparatus are used for floating bacteria.

1. The preparation for sampling apparatus and its treatment after sampling shall be performed in the minus pressure laboratory where air is exhausted by the high efficient filter. The temperature of the laboratory shall be 22±2°C. the relative humidity shall be 50%±10%.

2. The sampling apparatus shall be sterilized.

3. The sample-taking apparatus shall be reviewed on its accuracy and efficiency, and have certificate.

4. The exhaust of sampling apparatus shall not pollute the clean room.

5. The numbers of the petri dish, the sample points, cultivation medium and cultivation temperature, and the cultivation time shall be in accordance with the related specifications.

6. The sampling rate for floating bacteria should be more than 100L/min.

7. The air velocity of the collision cultivation medium shall be less than 20m/s.

B.6 Check on the indoor air temperature and the relative humidity

B.6.1 According to the fluctuation range of the temperature and the relative humidity, the adequate instrument with adequate accuracy shall be used for check. The time gap between two checks should not be more than 30min.

B.6.2 The arrangement for indoor test points:

1. Air damper

2. Symbolic locations in the constant temperature area (for example: the test points are arranged around the process equipment or arranged with equal distance among them.

3. The center of the clean room which requires no constant temperature.

4. Test points shall generally be arranged on positions 0.5m from the outside wall and 0.8m from the ground level. They can also be arranged on several sections which have different height from the ground level according to the size of the temperature constant area.

B.6.3 The number of the test points shall meet stipulations set forth in the table B.6.1

Table B.6.1 Test points for temperature and humidity

Fluctuation range	Room area ?50m2	20-50m2 added for each time
Dt = ±0.5--±2°C	5	3—5 added
DRH = ±5%--±10%
Dt ? ±0.5°C	The space between points shouldn’t be more than 2m, the number of points shouldn’t be less than 5.
DRH ? ±5%

B.6.4 For clean room which has constant temperature and humidity requirements imposed, the room fluctuation range curve shall be worked out according to the proportion of the maximum temperature variation of each test point in the total test points. 90% or above temperature deviation of the test point in the room temperature fluctuation range is deemed acceptable, vice verse is unacceptable.

The area temperature curve shall be worked out according to the proportion of the average temperature of each test point and the numbers exceeding deviation value in the total test points, taking the min. test point as basis. 90% or above temperature deviation shall be within the area temperature deviation and shall meet the design requirements. The fluctuation range of relative humidity can be in accordance with that of the temperature.

B.7 Check on average velocity and velocity uniformity for the section of one-way flow clean room

B.7.1 The working section of perpendicular one-way and multi-way flow clean room shall be more than 0.5m from the wall or the internal face of the protective structure and 0.5-1.5m from the ground level. The primary longitudinal section for horizontal one-way flow shall be 0.5m from the air supply wall or the protective structure.

B.7.2 The test points and apparatus for section to be tested shall meet requirements set forth in B.6.3.

B.7.3 When the air speed is measured, the anemoscope shall be fixed by the support in order to avoid body’s interference. If people have to use their hand to hold the anemoscope, the arm shall stretch to the maximum extent, making body remote from the detector as far as possible.

B.7.4 Produce smoke or hang up wire to identify the air shape in the room. Observe and take notes and mark the sign on the air flow drawing of the air section. Generally one filter at least corresponds to one observation point.

The uniformity of the air velocity b₀ is calculated according to the following equation, usually b₀ shall be less than 0.25.

v—average value of the air velocity for each test point

s—standard difference.

B.8 Inspection for indoor noise

B.8.1 The apparatus for noise measurement shall be sound level meter with octave analysis.

B.8.2 The test points shall be distributed uniformly according to the area of the clean room. One point shall be set per 50m2. The test point is located in the center which is 1.1-1.5m height from the ground or set according to the process requirements.

Appendix C Tables for Construction Quality Acceptance Inspection Records

C.1 Explanation on construction quality inspection and acceptance record of
ventilation and air conditioning work

C.1.1 Quality inspection and acceptance record of inspection batch of ventilation and air conditioning item work is filled out by quality inspector of that discipline on construction project, supervision engineer (Project professional technical responsible person of client) organizes project professional quality inspectors, etc. to carry out inspection and acceptance, and keep record according to requirement of quality inspection and acceptance table for inspection batch of each item work.

C.1.2 Quality inspection and acceptance record of ventilation and air conditioning item work is made by supervision engineer (project professional technical responsible person of client) who organizes construction project manager and relevant design responsible person to carry out inspection and acceptance, and to keep record according to table C.3.1.

C.1.3 Quality inspection and acceptance record of ventilation and air conditioning item work (sub-item work) is made by chief supervision engineer (project professional technical responsible person of client) who organizes project professional quality inspector to carry out inspection and acceptance, and to keep record according to table C.4.1 or table C.4.2.

C.2 Quality inspection and acceptance record of inspection batch of
ventilation and air conditioning work

C.2.1 Quality inspection and acceptance record of fabricated inspection batch of air duct and fitting is shown in Table C.2.1-1, C.2.1-2.

C.2.2 Quality inspection and acceptance record of fabricated inspection batch of duct fittings and silencers is shown in Table C.2.2.

C.2.3 Quality inspection and acceptance record of installed inspection batch of air duct system is shown in Table C.2.3-1, C.2.3-2, and C.2.3-3.

C.2.4 Quality inspection and acceptance record of installed inspection batch of air ventilator is shown in Table C.2.4.

C.2.5 Quality inspection and acceptance record of installed inspection batch of ventilation and air conditioning equipment is shown in Table C.2.5-1, C.2.5-2, and C.2.5-3.

C.2.6 Quality inspection and acceptance record of installed inspection batch of air refrigerating system is shown in Table C.2.6.

C.2.7 Quality inspection and acceptance record of installed inspection batch of air conditioning water system is shown in Table C.2.7-1, C.2.7-2, and C.2.7-3.

C.2.8 Quality inspection and acceptance record of inspection batch of anti-corrosion and insulation construction work is shown in Table C.2.8-1, C.2.8-2.

C.2.9 Quality inspection and acceptance record of inspection batch of project system debugging is shown in Table C.2.9.

C.3 Quality inspection and acceptance record of item works of
ventilation and air conditioning project

C.3.1 Quality inspection and acceptance record of item works of ventilation and air conditioning project is shown in Table C.3.1.

C.4 Quality inspection and acceptance record of item works (sub-item works) of
ventilation and air conditioning project

C.4.1 Quality inspection and acceptance record of sub-item works of ventilation and air conditioning project is made as the following provisions.

Air supply and exhaust system sub-item work is shown in Table C.4.1-1.

Smoke prevention and exhaust system sub-item work is shown in Table C.4.1-2

Dedusting ventilation sub-item work is shown in C.4.1-3.

Air conditioning air duct system sub-item work is shown in C.4.1-4.

Air cleaning system sub-item work is shown in C.4.1-5.

Refrigerating system sub-item work is shown in C.4.1-6.

Air conditioning water system sub-item work is shown in C.4.1-7.

C.4.2 Quality inspection and acceptance record of item works of ventilation and air conditioning project is shown in Table C.4.2.

Table C.2.1-1 Quality inspection and acceptance record of fabricated inspection batch of air duct and fitting

(Metallic air duct)

Name of project			Name of item work		Inspection & acceptance part
Construction contractor			Discipline lead		Project manager
Name & Serial number of standard executed
Subcontractor			Project manager of subcontractor		Head of construction team
Main control items	Provisions of quality inspection & acceptance specification			Inspection & appraisal record of construction contractor		Inspection & acceptance record of supervision organization (or client)
	1 Material type, performance and thickness (4.2.1)
	2 Refractory duct (4.2.3)
	3 Strength, air tightness & manufacturability test of air duct (4.2.5)
	4 connection of air duct (4.2.6)
	5 Reinforcement of air duct (4.2.10)
	6 Flow deflector of rectangular elbow (4.2.12)
	7 Air cleaning duct (4.2.13)


Common items	1 Fabrication of round elbow (4.3.1-1)
	2 External dimension of air duct (4.3.1-2,3)
	3 Welding air duct (4.3.1-4)
	4 Fabrication of flange air duct (4.3.2)
	5 Molybdenum or SS air duct (4.3.2-4)
	6 Fabrication of rectangular air duct without flange (4.3.3)
	7 Fabrication of round air duct without flange (4.3.3)
	8 Reinforcement of air duct (4.3.4)
	9 air cleaning duct (4.3.11)


Appraisal of inspection result of construction contractor		Project professional quality inspector: YY MM DD
Inspection conclusion of supervision organization (or client)		Supervision engineer: (Project professional technical responsible person of client) YY MM DD

Table C.2.1-2 Quality inspection and acceptance record of fabricated inspection batch of air duct and fitting

(Nonmetal, foil-insulant composite duct)

Name of project			Name of item work		Inspection & acceptance part
Construction contractor			Discipline lead		Project manager
Name & Serial number of standard executed
Subcontractor			Project manager of subcontractor		Head of construction team
Main control items	Provisions of quality inspection & acceptance specification			Inspection & appraisal record of construction contractor		Inspection & acceptance record of supervision organization (or client)
	1 Material type, performance and thickness (4.2.2)
	2 Material of foil-insulant composite duct (4.2.4)
	3 Strength, air tightness & manufacturability test of air duct (4.2.5)
	4 connection of air duct (4.2.6, 4.2.7)
	5 connection of foil-insulant composite duct (4.2.8)
	6 distortion seam of brick and concrete air channel (4.2.9)
	7 Reinforcement of air duct (4.2.11)
	8 Flow deflector of rectangular elbow (4.2.12)
	9 Air cleaning duct (4.2.13)


Common items	1 External dimension of air duct (4.3.1)
	2 Hard PVC air duct (4.3.5)
	3 Organic glass copper air duct (4.3.6)
	4 Inorganic glass copper air duct (4.3.7)
	5 Brick and concrete air channel (4.3.8)
	6 Double side aluminum foil insulation plate air duct (4.3.9)
	7 Aluminum foil fibre glass plate air duct (4.3.10)
	8 Air cleaning duct (4.3.11)


Appraisal of inspection result of construction contractor		Project professional quality inspector: YY MM DD
Inspection conclusion of supervision organization (or client)		Supervision engineer: (Project professional technical responsible person of client) YY MM DD

Table C.2.2 Quality inspection and acceptance record of fabricated inspection batch of duct fittings and silencers

Name of project			Name of item work		Inspection & acceptance part
Construction contractor			Discipline lead		Project manager
Name & Serial number of standard executed
Subcontractor			Project manager of subcontractor		Head of construction team
Main control items	Provisions of quality inspection & acceptance specification			Inspection & appraisal record of construction contractor		Inspection & acceptance record of supervision organization (or client)
	1 General air valve (5.2.1)
	2 Electric air valve (5.2.2)
	3 Fire damper, exhaust smoke valve (mouth) (5.2.3)
	4 Explosion proof air valve (5.2.4)
	5 Air cleaning system air valve (5.2.5)
	6 Special air valve (5.2.6)
	7 Exhaust-smoke-proof flexible spool (5.2.7)
	8 Noise elimination elbow, silencer (5.2.8)

Common items	1 Adjustable air valve (5.3.1)
	2 Non-return air valve (5.3.2)
	3 Flashboard air valve (5.3.3)
	4 Tee joint adjustment valve (5.3.4)
	5 Air rate balancing valve (5.3.6)
	6 Air hood (5.3.5)
	7 Air hat (5.3.7)
	8 Rectangular elbow deflector (5.3.8)
	9 Flexible spool pipe (5.3.9)
	10 Silencer (5.3.10)
	11 Inspection gate (5.3.11)
	12 Air draught (5.3.12)

Appraisal of inspection result of construction contractor		Project professional quality inspector: YY MM DD
Inspection conclusion of supervision organization (or client)		Supervision engineer: (Project professional technical responsible person of client) YY MM DD

Table C.2.3-1 Quality inspection and acceptance record of installed inspection batch of air duct system

(Air supply and discharge, exhaust smoke system)

Name of project			Name of item work		Inspection & acceptance part
Construction contractor			Discipline lead		Project manager
Name & Serial number of standard executed
Subcontractor			Project manager of subcontractor		Head of construction team
Main control items	Provisions of quality inspection & acceptance specification			Inspection & appraisal record of construction contractor		Inspection & acceptance record of supervision organization (or client)
	1 Air duct passing through refractory, explosion-proof wall (6.2.1)
	2 Other tubing passing through air duct strictly forbidden (6.2.2)
	3 Rigging for fixing of outdoor vertical duct (6.2.2-3)
	4 Air duct system above 80℃ (6.2.3)
	5 Installation of air valve (6.2.4)
	6 Installation of manual sealing valve (6.2.9)
	7 Air tightness test of air duct (6.2.8)


Common items	1 Installation of air duct system (6.3.1)
	2 Installation of air duct system without flange (6.3.2)
	3 Quality of air duct installation at horizontal and vertical direction (6.3.3)
	4 Support and hanger for air duct (6.3.4)
	5 Installation of air duct of aluminum and SS plate (6.3.1-8)
	6 Installation of nonmetallic duct (6.3.5)
	7 Installation of air valve (6.3.8)
	8 Installation of air hat (6.3.9)
	9 Installation of air suction and discharge hood (6.3.10)
	10 Installation of air draught (6.3.11)


Appraisal of inspection result of construction contractor		Project professional quality inspector: YY MM DD
Inspection conclusion of supervision organization (or client)		Supervision engineer: (Project professional technical responsible person of client) YY MM DD

Table C.2.3-2 Quality inspection and acceptance record of installed inspection batch of air duct system

(Air conditioning system)

Name of project			Name of item work		Inspection & acceptance part
Construction contractor			Discipline lead		Project manager
Name & Serial number of standard executed
Subcontractor			Project manager of subcontractor		Head of construction team
Main control items	Provisions of quality inspection & acceptance specification			Inspection & appraisal record of construction contractor		Inspection & acceptance record of supervision organization (or client)
	1 Air duct passing through refractory, explosion-proof wall (6.2.1)
	2 Other tubing passing through air duct strictly forbidden (6.2.2)
	3 Rigging for fixing of outdoor vertical duct (6.2.2-3)
	4 Air duct system above 80℃ (6.2.3)
	5 Installation of air valve (6.2.4)
	6 Installation of manual sealing valve (6.2.9)
	7 Air tightness test of air duct (6.2.8)


Common items	1 Installation of air duct system (6.3.1)
	2 Installation of air duct system without flange (6.3.2)
	3 Quality of air duct installation at horizontal and vertical direction (6.3.3)
	4 Support and hanger for air duct (6.3.4)
	5 Installation of air duct of aluminum and SS plate (6.3.1-8)
	6 Installation of nonmetallic duct (6.3.5)
	7 Installation of foil-insulant composite duct (6.3.6)
	8 Installation of air valve (6.3.8)
	9 Installation of air draught (6.3.11)
	10 Installation of end device for air changeable rate (7.3.20)


Appraisal of inspection result of construction contractor		Project professional quality inspector: YY MM DD
Inspection conclusion of supervision organization (or client)		Supervision engineer: (Project professional technical responsible person of client) YY MM DD

Table C.2.3-3 Quality inspection and acceptance record of installed inspection batch of air duct system

(Air cleaning system)

Name of project			Name of item work		Inspection & acceptance part
Construction contractor			Discipline lead		Project manager
Name & Serial number of standard executed
Subcontractor			Project manager of subcontractor		Head of construction team
Main control items	Provisions of quality inspection & acceptance specification			Inspection & appraisal record of construction contractor		Inspection & acceptance record of supervision organization (or client)
	1 Air duct passing through refractory, explosion-proof wall (6.2.1)
	2 Other tubing passing through air duct strictly forbidden (6.2.2)
	3 Rigging for fixing of outdoor vertical duct (6.2.2-3)
	4 Air duct system above 80℃ (6.2.3)
	5 Installation of air valve (6.2.4)
	6 Installation of manual sealing valve (6.2.5)
	7 Installation of air cleaning duct (6.2.6)
	8 Installation of vacuum cleaning system (6.2.7)
	9 Air tightness test of air duct (6.2.8)

Common items	1 Installation of air duct system (6.3.1)
	2 Installation of air duct system without flange (6.3.2)
	3 Quality of air duct installation at horizontal and vertical direction (6.3.3)
	4 Support and hanger for air duct (6.3.4)
	5 Installation of air duct of aluminum and SS plate (6.3.1-8)
	6 Installation of nonmetallic duct (6.3.5)
	7 Installation of foil-insulant composite duct (6.3.6)
	8 Installation of air valve (6.3.8)
	9 Installation of air draught of cleaning air condition (6.3.12)
	10 Installation of air cleaning system (6.3.7)
	11 Installation of air draught (6.3.22)

Appraisal of inspection result of construction contractor		Project professional quality inspector: YY MM DD
Inspection conclusion of supervision organization (or client)		Supervision engineer: (Project professional technical responsible person of client) YY MM DD

Table C.2.4 Quality inspection and acceptance record of installed inspection batch of air ventilator

Name of project			Name of item work		Inspection & acceptance part
Construction contractor			Discipline lead		Project manager
Name & Serial number of standard executed
Subcontractor			Project manager of subcontractor		Head of construction team
Main control items	Provisions of quality inspection & acceptance specification			Inspection & appraisal record of construction contractor		Inspection & acceptance record of supervision organization (or client)
	1 Installation of air ventilator (7.2.1)
	2 Safety measures for air ventilator (7.2.2)








Common items	1 Installation of centrifugal air ventilator (7.3.1-1)
	2 Installation of axial flow air ventilator (7.3.1-2)
	3 Isolation support of air ventilator (7.3.1-3, 7.3.1-4)









Appraisal of inspection result of construction contractor		Project professional quality inspector: YY MM DD
Inspection conclusion of supervision organization (or client)		Supervision engineer: (Project professional technical responsible person of client) YY MM DD

Table C.2.5-1 Quality inspection and acceptance record of installed inspection batch of ventilation and air conditioning equipment

(Ventilation system)

Name of project			Name of item work		Inspection & acceptance part
Construction contractor			Discipline lead		Project manager
Name & Serial number of standard executed
Subcontractor			Project manager of subcontractor		Head of construction team
Main control items	Provisions of quality inspection & acceptance specification			Inspection & appraisal record of construction contractor		Inspection & acceptance record of supervision organization (or client)
	1 Installation of air ventilator (7.2.1)
	2 Safety measures for air ventilator (7.2.2)
	3 Installation of deduster (7.2.4)
	4 Grounding of cloth bag and static electric deduster (7.2.4-3)
	5 Installation of static electric air filter (7.2.7)
	6 Installation of electric heater (7.2.8)
	7 Installation of filtering absorber (7.2.10)


Common items	1 Installation of air ventilator (7.3.1)
	2 Installation of dedusting equipment (7.3.5)
	3 Installation of site assembled static electric deduster (7.3.6)
	4 Installation of site assembled bag-type deduster (7.3.7)
	5 Installation of silencer (7.3.13)
	6 Installation of air filter (7.3.14)
	7 Installation of steam humidifier (7.3.18)
	8 Installation of wind curtain machine (7.3.19)



Appraisal of inspection result of construction contractor		Project professional quality inspector: YY MM DD
Inspection conclusion of supervision organization (or client)		Supervision engineer: (Project professional technical responsible person of client) YY MM DD

Table C.2.5-2 Quality inspection and acceptance record of installed inspection batch of ventilation and air conditioning equipment

(Air conditioning system)

Name of project			Name of item work		Inspection & acceptance part
Construction contractor			Discipline lead		Project manager
Name & Serial number of standard executed
Subcontractor			Project manager of subcontractor		Head of construction team
Main control items	Provisions of quality inspection & acceptance specification			Inspection & appraisal record of construction contractor		Inspection & acceptance record of supervision organization (or client)
	1 Installation of air ventilator (7.2.1)
	2 Safety measures for air ventilator (7.2.2)
	3 Installation of air conditioning unit (7.2.3)
	4 Installation of static electric air filter (7.2.7)
	5 Installation of electric heater (7.2.8)
	6 Installation of dry steam humidifier (7.2.9)


Common items	1 Installation of air ventilator (7.3.1)
	2 Installation of assembling air conditioning unit (7.3.2)
	3 Installation of site assembled air treatment room (7.3.3)
	4 Installation of unit-type air conditioning unit (7.3.4)
	5 Installation of silencer (7.3.13)
	6 Installation of air blower coil unit (7.3.15)
	7 Installation of low-, medium-efficiency air filter (7.3.14)
	8 Installation of air curtain device (7.3.19)
	9 Installation of wheel rotating type heat exchanger (7.3.15)
	10 Installation of wheel rotating type humidifier (7.3.17)
	11 Installation of steam humidifier (7.3.18)


Appraisal of inspection result of construction contractor		Project professional quality inspector: YY MM DD
Inspection conclusion of supervision organization (or client)		Supervision engineer: (Project professional technical responsible person of client) YY MM DD

Table C.2.5-3 Quality inspection and acceptance record of installed inspection batch of ventilation and air conditioning equipment

(Air cleaning system)

Name of project			Name of item work		Inspection & acceptance part
Construction contractor			Discipline lead		Project manager
Name & Serial number of standard executed
Subcontractor			Project manager of subcontractor		Head of construction team
Main control items	Provisions of quality inspection & acceptance specification			Inspection & appraisal record of construction contractor		Inspection & acceptance record of supervision organization (or client)
	1 Installation of air ventilator (7.2.1)
	2 Safety measures for air ventilator (7.2.2)
	3 Installation of air conditioning unit (7.2.3)
	4 Installation of air cleaning equipment (7.2.6)
	5 Installation of high efficiency filter (7.2.5)
	6 Installation of static electric air filter (7.2.7)
	7 Installation of electric heater (7.2.8)
	8 Installation of dry steam humidifier (7.2.9)


Common items	1 Installation of air ventilator (7.3.1)
	2 Installation of assembling air cleaning unit (7.3.2)
	3 Installation of equipment in cleaning room (7.3.8)
	4 Installation of assembled clean room (7.3.9)
	5 Installation of laminar flow hood in clean room (7.3.10)
	6 Installation of air ventilator filtering unit (7.3.11)
	7 Installation of low-, medium-efficiency air filter (7.3.14)
	8 Installation of high efficiency filter (7.3.12)
	9 Installation of silencer (7.3.13)
	10 Installation of steam humidifier (7.3.18)


Appraisal of inspection result of construction contractor		Project professional quality inspector: YY MM DD
Inspection conclusion of supervision organization (or client)		Supervision engineer: (Project professional technical responsible person of client) YY MM DD

Table C.2.6 Quality inspection and acceptance record of installed inspection batch of air refrigerating system

Name of project			Name of item work		Inspection & acceptance part
Construction contractor			Discipline lead		Project manager
Name & Serial number of standard executed
Subcontractor			Project manager of subcontractor		Head of construction team
Main control items	Provisions of quality inspection & acceptance specification			Inspection & appraisal record of construction contractor		Inspection & acceptance record of supervision organization (or client)
	1 Installation of refrigerating equipment and accessory equipment (8.2.1-1.3)
	2 Inspection and acceptance of equipment concrete foundation (8.2.1-2)
	3 Installation of surface cooler (8.2.2)
	4 Installation of equipment of fuel gas and fuel oil system (8.2.3)
	5 Air tightness test of refrigerating equipment and its test run (8.2.4)
	6 Installation of piping and piping fittings (8.2.5)
	7 Grounding of fuel oil piping system (8.2.6)
	8 Installation of fuel gas system (8.2.7)
	9 Non-destructive test of oxygen piping seam (8.2.8)
	10 Provisions of glycol piping system (8.2.9)
	11 Test on refrigerant piping (8.2.10)
Common items	1 Installation of refrigerating equipment (8.3.1-1,2,3,4,5)
	2 Installation of refrigerating accessory equipment (8.3.1-3)
	3 Installation of module type cooling unit (8.3.2)
	4 Installation of pump (8.3.3)
	5 Installation of refrigerant piping (8.3.4-1,2,3,4)
	6 Welding of piping (8.3.4-5,6)
	7 Installation of valve (8.3.5-2~5)
	8 Valve pressure test (8.3.5-1)
	9 Purging of refrigerating system (8.3.6)

Appraisal of inspection result of construction contractor		Project professional quality inspector: YY MM DD
Inspection conclusion of supervision organization (or client)		Supervision engineer: (Project professional technical responsible person of client) YY MM DD

Table C.2.7-1 Quality inspection and acceptance record of installed inspection batch of air conditioning water system

(Metallic piping)

Name of project		Name of item work		Inspection & acceptance part
Construction contractor		Discipline lead		Project manager
Name & Serial number of standard executed
Subcontractor		Project manager of subcontractor		Head of construction team
Main control items	Provisions of quality inspection & acceptance specification		Inspection & appraisal record of construction contractor		Inspection & acceptance record of supervision organization (or client)
	1 Inspection and acceptance of system piping materials and fittings (9.2.1)

GB 50243-2002

2 Glossary

3 Basic Provisions

Length of air duct edge

Table 4.2.6-1 Metal circle air duct flange and bolt specification (mm)

Bending angle and minimum segment

Table 4.3.3-1 Connection type of non flanged circle air duct

Table 4.3.5 Weld joint Type and Edge

Circle diffuser

Rectangular diffuser

Chapter 7 Installation of Ventilation and Air Conditioning Units

7.1 General Stipulations

Chapter 8 Installation of Air Refrigerating System

8.1 General Stipulations

8.2 Main Control Items

8.3 General Items

9 Installation of Piping and Equipment of Air Conditioning Water System

9.1 General Rules

9.2 Main Control Items

9.3 Common Items

Table 9.3.2 Bevel type and size of weld for piping

Table 9.3.5 Allowable deflection and inspection method of piping installed

12 Final Acceptance

13 Measurement and Adjustment of Comprehensive Efficiency

Appendix B Test Measures for the Clean Chamber

9 Installation of Piping and Equipment of
Air Conditioning Water System