The fire-distance for elevated flare shall be determined through heat radiation calculation; the fire-distance for elevated flare which may entraining combustible liquid, shall not be less than the requirements in Table 3.1.7.

Table 3.1.7 Fire distance for petrochemical enterprise to adjacent plants or facilities (m)

Production area Adjacent plants and facilities	Liquefied Hydrocarbon Tank group	Elevated flare entraining Liquid-combustible	Process unit or facilities for Class A and Class B
Residential Area, Public welfare facilities, villages	120	120	100
Adjacent Industrial Plants (enclosure wall)	120	120	50
State Railway (center line)	55	80	45
Offsite inter-plant railway (center line)	45	80	35
State-level or Industrial zone level train configuration station (railway centerline or buildings)	55	80	45
Offsite highway (Road side)	25	60	20
Power Transformer or distribution substation(enclosure wall)	80	120	50
Overhead power supply cablie (centerline)	1.5 times of the tower height	80	1.5 times of the tower height
Grade I. II. State overhead communication cable (center line)	50	80	40
Embankment of navigation rivers(center line)	25	80	20

Note:

(1) The statement in the brackets refer to the starting/ending point.

(2) In case the adjacent facility is the on-shore part of a harbour, warehouse or stockyard of very important goods, military facilities, airport etc., which has special requirement on the fire-distance for petrochemical enterprise, relevant (stipulations) shall be adhered to.

(3) For Class C process plant or facilities, the fire distance can be reduced by 25% as for Class A, B process plants or facilities.

3.2 Overall Layout

3.2.11 The fire-distance of petrochemical enterprise in overall layout, unless specified otherwise, shall not be less than that stipulated in Table 3.2.11. The fire-distance between process units or facilities (excluding tank groups), shall be determined based on the closest equipment, buildings or structures. For the definition of starting/ending point for fire-distance calculation shall be in compliance with Appendix F.

The fire-distance of elevated flare shall be determined through heat radiation calculations, for flare which may entrain combustible liquid, the fire-distance shall not be less than that specified in Table 3.2.11.

Table 3.2.11 Fire Distance of Overall Plot Plan for Petro-chemical Enterprise

Item Fire distance Item				Process Plant (Equipment, production house or warehouse)					Plant Important Facilities	Location of setting off Flame or sparkle	Above-ground combustible liquid Tank									LHC storage Tank					Combustible Gas Tank >1000m³ to 50000m³	LHC and Class A_II , Class B Liquid			Filling station		Class A goods warehouse or stockyard	Class A, B pump-house in Tank farm (Incl. Lead-adding and additive adding facilities as well as special-use substation	Waste-water Treatment unit (un-covered oil-separation basin)	Railway passage lane (centerline) Transportation passage for feedstock and product(road side)	Remarks
											Class A_II , B, fixed-roofing tank				Floating-Roof Tank or class C Fix-roof Tank					Full-pressure storage tank				Full-freezing storage tank		LHC and Class A_II , Class B Liquid			LHC	Class A_II , Class B liquid and combustible Gas
											>5000m³	>1000m³ to 5000m³	>500m³ to 1000m³	≤500 m³ or hor. tank	>5000m³	>1000m³ to 5000m³	>500m³ to 1000m³	≤500 m³ or Hor. tank		>1000m³		>100m³ to 1000m³	≤100 m³			Loading Area of wharf	Loading Area of truck	train Loading facilities,Tank-Truck washing station

				A		B		C
Process Plant (Equipment, production house or warehouse)			A	30 25		-		-																											② ③ ④
			B	25 20		20 15		-
			C	20 15		15 10		10
Plant Important Facilities				35		30		25																											⑤
Location of setting off flame or sparkles				30		25		20
Above-ground combustible liquid tank	Class A_II, B fixed-roofing tank	>5000m³			50		40	35	50	40	See Table 5.2.7																								① ④
		>1000m³to 5000m³			40		35	30	40	35
		>500m³ to 1000m³			30		25	20	35	30
		≤500 m³or horizontal tank			25		20	15	30	25
	Floating-Roof Tank or class C Fix.-roof Tank	>5000m³			35		30	25	35	30
		>1000m³ to 5000m³			30		25	20	30	25
		>500m³ to 1000m			25		20	15	25	20
		≤500 m³ or horizontal tank			20		15	10	20	15
LHC storage Tank	Full-pressure storage tank	>1000m³		60		55		50	70	60	50	40	35	30	40	35	30		25		See Table 5.3.3
		>100m³ to 1000m³		50		45		40	60	50	45	35	30	25	35	25	20		15		See Table 5.3.3
		≤100 m³		40		35		30	45	40	40	30	25	20	30	20	15		10
	Full-freesing storage tank			60		55		50	70	60	30	30	30	30	30	30	30		30		30	30	30
Combustible Gas Tank >1000m³ to 50000m³				25		20		15	30	30	30	25	20	15	20	15	10		8		40	30	25	40											④⑥
LHC and Class A_II, Class B liquid		Loading area of jetty		35		, 30		25	40	35	50	40	35	30	40	35	30		25		55	45	40	55	25	-									④ ⑦
		Truck loading station		25		20		15	30	25	25	20	15	10	20	15	12		10		45	35	30	45	15	20	-
		Train loading facilities, tank-truck washing station		30		25		20	35	30	25	20	15	10	20	15	12		10		50	40	35	50	20	25	15	10

Filling station	LHC	30	25	20	35	30	35	30	25	20	25	20		17	15	45	40	35	45	20	30	20	25	-
Filling station	Class A_II, Class B liquid, CG and combustible supporting gas	25	20	15	30	25	30	25	20	15	20	15		12	10	40	35	30	40	15	25	15	20	-	-
Class A goods warehouse or stockyard		30	25	20	35	30	35	30	25	20	25	20		15	10	60	50	40	60	20	20	25	30	30	25	-				④⑧
Class A, B pump-house in tank-farm (incl., lead adding and additive adding facilities as well as special-use substation)		20	15	10	20	15	20	15	12	10	15	12		10	8	35	30	25	35	15	15	10	12	25	20	20	-			④⑨
Waste water treatment unit (un-covered oil-separation basin)		30	25	20	35	30	30	25	20	20	25	20		20	20	40	35	30	40	25	40	25	30	30	25	30	20	-		④⑩
Railway passage lane (centerline), transportation passage for feedstock and product (road side)		15	10	10	-	-	20	15	12	10	10	15		10	10	25	20	15	25	10	10	10	15 (10)	10	10	10	10	10	-	(11)
Elevated flare possibly entraining combustible liquid		90	90	90	90	60	90	90	90	90	90	90	90		90	90	90	90	90	90	90	90	90	90	90	90	60	90	50	(12)
Factory enclosure wall (centerline)		10	8	6	-	-	10	10	10	10	10	10	10		10	10	10	10	10	10	10	6	8	10	10	10	8	10	-

Note of Table 3.2.11

(1) Fire-distance between tank groups and other facilities is determined based on the tank with the biggest volume;

(2) Fire-distance shall be determined based on the fire-hazard class of adjacent equipment, and buidings; the numerator is applicable for petrochemical units; and the denominator is applicable for refinery units.

(3) In case the product of one unit goes directly to other unit, the fire-distance in-between can be reduced, but not less than 15m; or not less-than 10m for Class C units. Complex unit can be considered as a single unit, the fire-distance of equipment, buildings shall be implemented in accordance with Clause 4.2.1 of the code. For examples of classification of fire-hazard for process plants or units inside plants, see Appendix E.

(4) In case process plants or facilities which possibly set off combustible gas are arranged adjacently with direct-firing furnace of process plant, the fire-distance shall be determined as to the location direct firing.

(5) For independent power transformer and distributing substation, work-shop office, etc., the distance can be reduced by 25% (excluding flare).

(6) For tank with unit volume at or below 1000 m³, it may be reduced by 25%; for tank with unit volume above 5000 m³, it shall be increased by 25% (excluding flare).

(7) For Class C liquid, the distance can by reduced by 25% (excluding flare).

(8) This case includes warehouse of filled cylinders of combustible gas, or combustion-supporting gases. For ware-house (shelter, stockyard) storing Class B, Class C goods, it may be decreased by 25%; for stockyard of Class C combustible solid, it can by reduced by 50% ( apart from flare).

(9) Special-use pumps (or pump-houses) for tank group shall be arranged out side for fire-dike; the fire-distance to tank groups is as following: Class A_I, it shall not be less than 15m; for Class A_II, C, it shall not be less than 12m; for floating-roof tank groups, Class C tank groups, not less than 10m (for tank with volume at or below 500m³, it shall not be less than 8m).

(10) For emergency liquid basin, the fire-distance can be determined as for wastewater treatment unit (un-covered oil-separation basin). The fire-distance for sewage-oil tanks in waste-water treatment unit may be reduced by 25%; the fire-distance for sewage-oil pumps (or pump-houses in waste-water treatment unit may be reduced by 50% (excluding flare); the fire-distance for other equipment or structures in waste-water treatment unit is not specified.

(11) Railway passage lane, transportation passage for feedstock and product shall be arranged outside the fire-hazardous and explosion-hazardous area. The figure in bracket is applicable for transportation passage for feedstock and product.

(12) For the fire-distance for elevated flare, see the text of Clause 3.2.11.

3.2.11A In case taking following fire-proofing measures, the fire-distance specified in

Table 3.2.11 may be reduced by a little:

A the fire-distance for for train loading facilities for Class A_II and Class B

liquid may be reduced by 25% but shall not be less than 10m when hermetic

loading system is adopted;

B the fire-distance for for truck loading facilities may be reduced by 25% but

shall not be less than 10m when measures is taken to prevent liquefied hydro-

carbon from being drained locally;

C the fire-distance for fixed-roof tanks may be determined the same as for

floating-roof tank in case nitrogen blanket has been applied for fixed-roof tank;

D the fire-distance for waste-water treatment unit may be reduced by 25%

when oil-separation basin is covered and there exist semi-fixed steam-

smothering system installed;

E For heating furnace, oven and direct-firing equipment, etc., the fire-distance

may be reduced by 25% in case there are inter-lock facilities of combustible-

gas concentration alarmer and steam- smothering screen.

3.3 In-site Road

3.3.5 For process units, liquefied hydro-carbon tank farms, oop fire-vehicle access shall be designed; for combustible-liquid storage tank-farms and loading-areas, chemicals warehouse, loop fire-vehicle access shall be designed; in case restricted by topographical conditions, the dead end fire vehicle access with turning-round yard may be acceptable also. The width of fire-vehicle access shall be less than 6m, the turn-round radius of interior edge should not be less than 12m; and the clearance above road shall not be less than 5m.

3.4 In-site Railway

3.4.4 In side train loading area for liquefied hydrocarbon, combustible liquid, the distance from diesel locomotive to pick-arm of another platform shall meet following requirements

A. The distance shall not be less than 12m for Class A, B loading-arm;

B. The distance shall not be less than 8m for Class C liquid.

In case adopting hermetic loading system for combustible liquid, the fire-distance may be reduced by 25%.

3.4.8 In the train loading block for Class A, B, C, the fire-distance between two adjacent loading-arms shall not be less than 10m; but for Class C combustible liquid, it shall not be less than 7m;

In case adopting hermetic loading system for combustible liquid, the fire-distance may be reduced by 25%.

4 Process Plant

4.2 In-site Layout

4.2.1 The fire-distance of equipment, buildings unless specified in the code shall not be less than the specification in Table 4.2.1.

.

Table 4.2.1 Fire Distance of Overall layout for Equipment and Buildings (m)

		Class of LHC and CL liquid Class o LHC and CL	Class of CG gas Class of CG gases	CR, substations, lab. Rms, office bldg., living rms	Direct firing equipment	Process equipment with the medium temperature is below ignition point								Process equipment with medium temperature at or above igniting point
		Class of LHC and CL liquid Class o LHC and CL	Class of CG gas Class of CG gases	CR, substations, lab. Rms, office bldg., living rms	Direct firing equipment	Comb. gas Compressor or compressor house		Intermediate storage tank, electric demineralization or dewatering tank			Other process equipment or rooms			Reactor lined with inner hot-insulation	Other process equipment or rooms
Class of LHC and CL				-	-	-	-	A_I	A_II, B_I	B_II , C_I	A_I	A_II, B_I ,	B_II , C_I	-	-
Class of CG gas				-		A	B	-	A	B	-	A	B	-	-
cntrl rms., substations, lab., rms, office bldg., living rms		-	-	-
Direct firing equipment		-	-	15	-
Process equipment with medium temperature below ignition point ①	CG gas compressor or compressor house ②	-	A	15	22.5	-
	CG gas compressor or compressor house ②	-	B	9	9	-	-
	Intermediate storage tank, electric demineralization or dewatering tank t ③	A_I	-	22.5	22.5	15	9	-	-	-
		A_II, B_I	A	15	15	9	7.5	-	-	-
		B_II, C_I	B	9	9	7.5	7.5	-	-
	Other process equipment or its rooms	A_I	-	15	22.5	9	7.5	9	9	7.5	-	-	-
		A_II, B_I	, A	15	, 15	9	-	9	9	7.5	-	-	-
		B_II , C_I	B	9	9	7.5	-	7.5	7.5	-	-	-	-
Process equipment with the medium temperature at or above igniting point	Reactor lined with inner hot-insulation	-	-	15	4.5	9	7.5	22.5	15	9	9	7.5	4.5	-
	Other process equipment or rooms	-	-	15	4.5	9	4.5	15	9	9	7.5	4.5	-	7.5	-

Note:

(1) 250℃ is assumed if the ignition point is unavailable

(2) the fire-distance for combustible gas compressor with unit drive power less than 150kW may be determined as for “the other process equipment” in which the medium temperature is below ignition point.

(3) the maximum volume of plant storage tank shall be in accordance with Clause 4.2.28. The fire-distance may be determined as for “other process equipment” in which the medium temperature is below ignition point on the condition that the unit volume of storage tank is less than 50m³ for liquefied hydrocarbon, 100m³ for combustible liquid, 200m³ for combustible gas.

(4) The water pond and oil separation pond containing combustible liquid can be determined in accordance with the specifications of “other process equipment” in which the medium temperature is below ignition point.

(5) the fire-distance for Class C_II liquid equipment is not specified.

(6) the fire-hazard classification of equipment shall be determined by the fire-hazard classification of materials that are handled, stored or transported. The fire-hazard classification of buildings shall be determined by the highest fire-hazard class of the equipment in the buildings.

4.2.4 this clause is deleted.

4.2.10 Equipment shall be placed in the open-air or semi-open-air, and the extent of explosion hazardous area shall be reduced. The extent of explosion hazardous area shall be determined in accordance with the current state-standard “Code for Design of Electrical Installation in Explosion-hazardous and Fire-hazardous Locations”.

In case required by process or restricted by nature conditions, some equipment may be placed in-doors.

4.2.19 Plant control room shall be arranged in the same building with other rooms involving Class A, B_I equipment; if having to be arranged in the same building, the control room shall be partitioned from the above-said rooms by fire-wall, whose fire-resistance shall be Grade I. In case a room likely giving off sparkles is adjacent with above-said room, the distance of doors or windows shall be in accordance with current state standard “Code for Design of Electrical Installation in Explosion-hazardous and Fire-hazardous Locations”.

4.2.21 The arrangement of plant control room, power transformer and distribution substation, laboratory room shall be in accordance with following:

A. Control room, power transformer and distribution substation should be arranged on the first floor of buildings; in case required by process or restricted by other conditions, control rooms, power transformer and distribution substation may be arranged on the second floor or higher.

B. Inside the plant releasing heavier-than-air combustible gas, the indoors grade of control room, power transformer and distribution substation, and laboratory room shall be at least 0.6m above the outdoors grade.

C. The exterior wall of control room towards fire-hazardous equipment shall be non-combustible solid wall without doors, windows or openings;

D. The primary instrument of the on-line analyzer for combustible gas, liquefied hydro-carbon, combustible liquid must not be arranged inside control room or laboratory room; in case the above said instruments are placed in the room adjacent to the control rooms, laboratory rooms, the partition wall shall be fire-proofing.

4.2.23 The control room for two or more units in a complex plant, the fire-distance to Class A, Class B or direct-firing equipment shall not be less than 25m; the fire-distance to Class C equipment shall not be less than 15m.

4.2.24 The design of combustible gas compressor arrangement and its house shall be in accordance with following:

A. The combustible gas compressor should be arranged in a open or semi-open house.

B. Class A combustible gas compressor house with unit power at or above 150 kW should not be arranged in the same building with other Class A, B and C house; Class A, B and C equipment must not be placed above the compressors, which is not subject to self-furnished lube-oil console.

C. On the ceiling of the open house or semi-open house for lighter-than-air combustible gas compressor, forced ventilation measures shall be adopted.

D. Grated plate should be adopted for part of the compressor house floor for lighter-than-air combustible gas.

E. On the ground of compressor house for heavier-than-air combustible gas, trench or ditch should not be designed. In side compressor-house, there shall be measures to prevent gas from accumulating.

4.2.25 Liquefied hydro-carbon pump, combustible liquid pump shall be arranged in open-air or semi-open-air. In case placed inside closed pump house, the design of hydro-carbon pump, combustible liquid pump and its house shall be in compliance with following:

A. Liquefied hydro-carbon pump, and combustible liquid pump with the operating temperature at or above flash point shall be arranged in different room from combustible liquid pump with the operating temperature below flash point; the in-between partition wall shall be fire-proofing.

B. For combustible liquid pump house with the operating temperature at or above flash point, the distance of the doors and windows to that for Class A_I, Class B_I combustible liquid pump house with the operating temperature of below flash point shall not be less than 4.5 m.

C. On the ground of Class A, BI liquid pump house, trenches or ditches should not be designed. In side pump-house, there shall be measures to prevent gas from accumulating.

D. In case the number of liquefied hydro-carbon pump is not more than two, they may be placed in the same house with the combustible liquid pump with the medium temperature below ignition point.

4.2.28 For some plant storage tanks of feedstock or product, which do not take part in process progress and have to be placed near to plant, in case the total volume of the storage tanks is: not more than 100 m³for liquefied hydro-carbon, not more than 1000 m³for combustible gas or combustible liquid, the fire-distance to adjacent equipment or buildings shall be determined in accordance with Table 4.2.1; in case the total volume of the storage tanks is: above 100 m³but below 300 m³ for liquefied hydro-carbon, above 1000 m³but below 3000 m³ for combustible liquid, above 1000 m³but below 5000 m³ for combustible gas, the tanks can be placed in the neighbour-hood of plant and the fire-distance to plant shall not be less than the specifications in Table 4.2.28.

The fire-distance between storage tanks shall be in accordance with the relevant requirements of Chapter 5.

Table 4.2.28 Fire-distance for Plant Storage Tank to Plant (m)

Class of Tank Class of Plant	Liquefied Hydro-carbon	Combustible Liquid		Combustible Gas
Class of Tank Class of Plant	Class AI	Class AII, B	Class C	Class A, B
Class A	30	25	20	15
Class B	25	20	15
Class C	20	15	15

4.4 Pressure Relief

4.4.4 The outlet connection of safety valve for combustible gas and combustible liquid equipment shall be in compliance with following specification:

A. The exhaust pipe of safety valve for combustible liquid equipment shall be connected to storage tank or other container; the exhaust pipe of safety valve for pump should be connected to the suction line of the pump, column or other containers.

B. The exhaust pipe of safety valves for combustible gas shall be connected to flare system or other safety relief facilities.

C. The combustible gas or combustible liquid, which may likely burn instantly after relieving shall be cooled prior to be connected to the vent system

D. The combustible gas which may likely entrain corrosive drops shall be connected to flare system after being separated.

4.5 Fire-resistance Protection

4.5.1 For following load-bearing steel structure, supports, skirts, pipe supports, fire-resistance cover shall be made.

A. Load-bearing steel structure, steel supports, steel skirts for Class A, B, liquid equipment with unit volume at or above 5m³;

B. Load-bearing steel structures, steel supports, steel skirts for Class BII, Class C liquid equipment with unit volume at or above 5m³, in which the temperature is equal to or more than its ignition point;

C. Steel support for furnace;

D. Steel pipe-support for main pipe-rack located in explosion hazardous locations.

E. Load-bearing steel frame, support and skirts of equipment with the ratio of height to diameter at or above 8, and the total weight at or above 25t, which is located inside explosion-hazardous area and handles non-combustible material,.

4.5.2 For load-bearing steel structure support, skirt and pipe-support, following position shall be covered with fire-resistance layer:

A. Load-bearing steel structure: all of beams, columns for single-storey structures; all of beams, columns 10m above ground for multi-storey structures whose floor is perforated grate plate; beams, columns above the storey for multi-storey structures whose floor is close type plate;

B. Load-bearing steel support for equipment and heating furnace: all of beams and columns;

C. Un-insulated section of exterior surface of steel skirts as well as the interior surface of steel skirts with the radius more than 1.2m;

D. Steel pipe-rack: all of beams, columns of pipe-way on the basement floor and should not be lower than 4.5m; in case air-cooler placed on the pipe-rack, all of beams, columns and braces of pipe-rack shall be covered with fire-resistance layer.

4.5.3 The duration of fire-resistance for components covered with fire-resistance layer shall not be less than 1.5h. In case applying fire-proofing paints for fire-resistance layer, thick type inorganic fire-resistance paints which is adaptable to hydrocarbon type fire disaster shall be selected.

4.6 Others

4.6.5 For floors of multi-story buildings or structures involving combustible liquid measures shall be taken to prevent the combustible liquid from seeping to the lower story.

5 Storing and Transporting Facilities

5.1 General

5.1.4 Where Class A combustible gas or liquid may leaks out, combustible gas alarming detector should be installed.

5.2 Above Ground Tank of Combustible Liquid

5.2.5 The total volume of liquid tank group shall be in accordance with following specification:

A. The total volume of fixed-roof tank group shall not be over 120,000m³ ;

B. The total volume of floating-roof tank group and inner floating-roof tank group shall not be over 600,000m³ .

5.2.6 The quantity of tanks with unit volume at or above 10000m³ in a tank group shall not be more than twelve; but for tanks with unit volume less than 10000m³ in a tank group, the quantity shall not be more than sixteen; for tanks with each volume less than 1000m³ and Class C_II liquid tanks, the specification is in-valid.

5.2.7 The fire-distance of adjacent above-ground combustible liquid tanks in a tank group shall not be less than the specification in Table 5.2.7.

Table 5.2.7 Fire-distance of Adjacent Above-ground Combustible Liquid Tank in tank group

Type Class	Fixed-roof tank		Floating-roof, inner floating-roof	Horizontal tank
	￡ 1000 m³	> 1000 m³	Floating-roof, inner floating-roof	Horizontal tank
Class A_II, B	0.6 D (Fixed Fire-cooling); 0.75 D (Mobile Fire-cooling)	0.6D	0.4D	0.8 m
Class C_I	0.4D, but should not be over 15m		-
Class C_II	2 m	5 m	-

Note:

(1) The figure D in the table refers to the bigger one of two adjacent tanks; for single tank with the volume more than 1000 m³, it refers to the bigger one of following two figures: the diameter or the height of the tank;

(2) The fire-distance of adjacent tanks which stores different class combustible liquid or different type, the bigger one of the values shall be adopted;

(3) Fire distance of elevated tanks shall not be less than 0.6m;

(4) For the shallow-disc floating-roof tank, the fire-distance is the same as for fixed-roof tank

5.2.16 For the design of fire-dike and partition-dike, following specification shall be met:

A. Fire dike and partition dike shall be possible to bear the hydraulic pressure of the liquid, and shall not leak out;

B. For vertical storage tank, the height of fire-dike shall be equal to the calculation result plus 0.2m, and shall be from 1.0m to 2.2m; for horizontal storage tank, the height of fire dike shall not be lower than 0.5m;

C. The height of partition dike shall be 0.2~0.3m lower than fire-dike at the point passing through dike for pipeline shall be closely sealed by use of non-combustible material;

D. In side the fire dike, measures shall be taken at the point passing through dike for rain ditch to prevent combustible liquid from flowing out of the dike;

E. On different orientation of fire dike, more than two stages or ramps shall be installed; stages shall be installed for all of partition dike;

5.3 Above-ground Liquefied Hydro-carbon, Combustible Gas and Combustion-supporting Gas Storage Tank..

5.3.2 In case liquefied hydro-carbon tank are arranged in groups, following requirements shall be met.

A. The number of rows in tank groups of full-pressure type or full-freezing type shall not exceed two; loop fire-vehicle access shall be designed all around tank groups;

B. The number of rows in each full-pressure type tank-group shall not exceed twelve; the number of rows in full-freezing type tank-group shall not exceed two;

C. For full-pressure type tank-group, in case the total volume of a full-pressure type tank group exceeds 6000 m³, partition dike shall be installed in tank-group; the volume of partition dike shall not be more than 6000 m³; in case unit volume of tank is at or above 5000 m³, tanks shall be partitioned every one. For full-freezing type tank-group, tanks shall be partitioned every one. The partition embankment shall be 0.2m lower than fire embankment of dike.

D. Tanks with different storage mode shall not be placed in the same tank-group.

5.3.3 In side the tank groups of liquefied hydro-carbon, combustible gas combustion-supporting gas, the fire-distance shall not be less than the specification in Table 5.3.3.

Table 5.3.3 Fire-distance of tank in groups for liquefied hydro-carbon, combustible gas, combustion-supporting gas

Tank Type Class of tank			Spherical tank	Full-freezing tank	Horizontal tank	Water-channel type gas holder	Dry type gas-holder
liquefied hydro-carbon	Full-pressure tank	With emergence emission device to discharge to flare	0.5 D		1.0D Should not exceed 1.5 m	-
	Full-pressure tank	Without emergence emission device to discharge to flare	1.0 D		1.0D Should not exceed 1.5 m	-
	Full-freezing tank			0.5D
combustible gas combustion-supporting gas			0.5 D		0.65D Should not exceed 1.5 m
Combustible gas		Water-channel type gas holder				0.5D
		Dry type gas-holder					0.65D
		Spherical tank	0.5 D

Note:

(1) D is the diameter of the bigger one of two adjacent tanks;

(2) For spherical tank and horizontal tank in the same tank-group, the bigger figure shall be adopted for the fire-distance;

(3) The fire-distance for liquid ammonia shall be the same as for liquefied hydro-carbon storage-tank; as for the fire-distance for liquid oxygen, the relevant requirements specified in the current state standard “Code for Design of Building Fire Protection”shall be adhereed to.

(4) For semi-freezing liquefied hydro-carbon storage tank, the fire-distance for full-pressure liquefied hydro-carbon storage tanks shall be adopted.

5.3.7 For cryogenic liquid ammonia storage tank, fire dike shall be installed; the effective volume inside the dike shall be equal to 60% of the volume of the largest one

5.3.7 5.3.7A For full-freezing type liquefied hydro-carbon storage tank in tank-groups, fire dikes shall be installed in accordance with following specifications:

A. the distance from full-freezing type liquefied hydrocarbon storage tanks to the interior foot of fire-embankment shall be equal to the difference between the highest level of storage tank and the height of fire-embankment. The available volume in the fire-dike shall be equall to the volume of the biggest tank;

B. walking steps or ladders shall be installed for fire-dike;

C. fire-dike and partition-dike shall be made of non-combustible solid protection structure, which shall be capable to endure the hydraulic pressure of the liquid and the influence due to temperature fluctuation, and shall be free of leakage.

5.3.11 On liquefied hydro-carbon storage tank, liquid level gauge, temperature gauge, pressure gauge, safety valve, as well as high-level alarming device or high level auto-down device for material adding by inter-dock shall be installed. For full-freezing liquefied hydro-carbon tank, vacuum relief device shall be furnished in addition.

5.3.16 For the connection valves and fittings for opening nozzle on liquefied hydro-carbon tank, the pressure rating of piping class shall not be less than 2.0 MPa; the gasket shall be of wound type gasket. The seal-material of valve bonnet shall be of non-combustible material. For full-pressure storage tank, pipeline and valve for water-flooding purpose for tank shall be installed.

5.4 Loading Facilities of Combustible Liquid, Liquefied Hydro-carbon

5.4.4 The train and truck loading facilities for liquefied hydro-carbon shall be in accordance with following specification:

A. Liquefied hydro-carbon train loading platform shall be installed independently; in case not operated simultaneously, it may also be installed on the same platform with for combustible liquid;

B. Liquefied hydro-carbon must not be drained locally;

C. The distance among loading-arm seats for liquefied hydro-carbon loading truck shall not be less than 4 m;

D. The pavement inside loading station for liquefied hydro-carbon shall of cast-in-situ concrete;

E. In addition, the train loading facilities for liquefied hydro-carbon shall be in compliance with Clause 5.4.1 in the code;

5.4.5 The design of combustible liquid jetty, liquefied hydro-carbon jetty shall be in accordance with following specification:

A. The minimum distance from jetty to the adjacent berth shall be in accordance to the specification in Table 5.4.5 based on the ship model:

Table 5.4.5 Minimum Distance of Adjacent Berthes for Jetty (m)

Ship Length (L)	279~236	235~183	182~151	150~110	< 110
Min. Distance	55	50	40	35	25

Note:

In case a ship anchored in the outer block of jetty，the specification is invalid.

B. berth for liquefied hydro-carbon shall be installed independently; in case not operated at the same time, it may share a berth with other combustible liquid;

C. The safety distance from jetty for liquefied liquid and liquefied hydro-carbon to other jetties, buildings and structures shall be in compliance with relevant specification in current state standard “Code for Design of Oil-loading Jetty Fire-prevention”;

D. Emergence cut-off valve convenient to operate shall be installed on the ship loading pipeline with 20m distance away from berthes or embankment;

E. Loading-arm or metal hose shall be adopted for loading pipe of liquefied hydro-carbon, and safety vent measures shall be taken.

5.7 Pump and Compressor

5.7.1 5.7.1A. In full-freezing type storage facilities for liquefied hydrocarbon, the fire-distance for pumps, compressors and other rotatary equipment to storage tanks shall not be less than 15m; for other equipment and non-rotatary equipment to storage tanks, the fire-distance shall be in compliance with the specification of Chapter 4 of this code.

5.9 Warehouse in Plant

5.9.1 The warehouse for Class A, B and C goods shall be in compliance with following specifications:

A. The warehouse for Class A goods shall be installed separately and the storage shall not exceed 30t; in case the storage is less than 3 t, the warehouse for Class A goods can share one building with those for Class B, C goods; however independent partition blocks shall be installed for the warehouse.

B. The storage for Class B, C goods shall be calculated based on the production of the plant for a period of 2 to 15 days;

C. Goods shall be stored separately in accordance with the physical property and chemical property; in case it is not allowed to be stored together for property reason, solid wall shall be adopted for partition and entrance and exit be installed individually.

D. The ware-house shall be ventilated properly;

E. The pavement inside the warehouse, where there is a chance to generate explosive gas mixture or explosive mixture of dus, fibbre etc., in the air, shall be non-sparkle-generating surface, and if required, it shall be furnished with water-proofing layer.

6 Combustible Liquid Containing Process Waste-water Pipeline, Waste-water Treatment Unit and Circulating Water Station

6.1 Combustible Liquid Containing Process Waste-water Pipeline

6.1.2 For the process waste-water drainage, covered conduit or covered gutter with the thickness of covering soil not-less-than 200mm shall adopted. In case open ditch has to be adopted to drain inside plant, it shall be furnished by several segments, and the length of each segment should not exceed 30 m, the interval of adjacent segments should not be less than 2m.

6.1.7 The production waste water line inside tank groups shall be furnished with independent discharges and the hydraulic seal pots shall be installed outside fire dike; and between the hydraulic seal pots and fire embankments, conveniently operated cut-off valve shall be installed.

6.1.8 For production waste water pipeline inside Class A, B process plants, vent pipe should be installed at the highest check well for waste-water header or subheader;

7 Fire-fighting

7.2 Fire-fighting Station

7.2.5 For petrochemical enterprise, the fire-vehicle furnishment for fire-fighting station shall be mainly based on big-sized foam fire-vehicle; dry-powder fire-engine or dual-purposed fire-engine for dry-powder and foam; for big-scaled petrochemical enterprise, high-rise spraying fire-engine and telecommunication command vehicle should be furnished also.

7.2.6 A fire-fighting station must be equipped with device to receive fire-alarming signal and communication system; the furnishement shall be in accordance with following:

A. The alarm reveiving telephone for telephone alarming system shall be record type;

B. In case installing automatic alarm or manual alarm push-button system, alarm signal indication panel should be installed;

C. In case an enterprise is equipped with television safety monitoring system, indication screen should be installed in fire-fighting station;

D. In case an enterprise is equipped with automatic extinguishing system, the feed-back signal should be indicated in the fire-fighting station.

7.2.7 In case the storage of foam inside fire-fighting station is some-how big, suitable facilities should be installed to quickly fill foam into fire-engine. Grade I fire-fighting station should be furnished with foam-tank trailer or transportation vehicle, on which facilities shall be installed to fill foam to fire-engine.

7.3 Fire-fighting Water Supply System

(II) Fire-fighting Water Consumption

7.3.6 The fire water demand for one-time fire-fighting shall be in compliance with following specification:

A. Outdoors water supply of fire-fighting water for residential area and buildings shall be determined in accordance with the relevant specification stipulated in the current state standard “Code for Design of Building Fire Protection”;

B. Water supply of fire-fighting for process plant shall be determined comprehensively considering the plant scale, class of fire-hazard and the installation of fixed fire-fighting facilities, etc.. In case there is difficulty indeed, tt can decided in accordance with Table 7.3.6. The duration of water supply for fire-fighting shall not be less than 3 h.

Table 7.3.6 Fire-fighting Water Demand for Process Plant (L/s)

Plant Scale Type of Plant	Medium-sized plant	Big-sized Plant
Petrochemical plant	150~300	300~450
Refinery plant	150~230	230~300
Ammonia Plant and its after-process plant	90~120	120~150

Note:

Fire-fighting water demand for artificial fibre factory buildings may be determined in accordance with the relevant specifications of current state standard “Code for Design of Building Fire Prevention”.

C. Fire-fighting water demand for auxiliary production facilities may be calculated as 30 L/s. The duration of water supply for fire-fighting should not be less than 2 h.

7.3.7 Fire-fighting water demand for combustible liquid tank group shall be in compliance with following specifications:

A. Fire-fighting water supply shall be calculated based on the tank group requiring the biggest of fire-fighting water demand, which shall be equal to the sum of water consumption , for formulating foam and for cooling burning tanks and the adjacent tanks;

B. In case the burning tank is vertical, the adjacent tanks in the range of 1.5 times of the diameter of the burning tank shall be cooled by water; in case the burning one is horizontal, the adjacent above-ground tanks in the range of half of the sum of the diameter plus the length of burning tank shall be cooled by water.

C. In case the number of adjacent vertical tanks exceeds three, cooling water consumption may be calculated as for three tanks; in case the burning tank is floating roof or cabinet-floating type inner-floating-roof (excluding the floating roof is of fusible material), the water for cooling adjacent tanks may not be included.

7.3.8 Fixed or mobile fire-fighting cooling water system shall be installed for combustible liquid above-ground vertical tank; and the supply range, supply intensity and installation mode shall be in compliance with following:

A. Fire-fighting water supply range and intensity shall not be less than the specification in Table 7.3.8;

B. For un-insulated tank with the height above 17m or the volume at or above 10000m³, fixed type fire-fighting cooling water system shall be installed; but for lube-oil storage tank, mobile fire-fighting cooling water system may be adopted;

C. For fixed type fire-fighting cooling water system, control device shall be installed to ensure the water supply intensity.

Table 7.3.8 Supply Range and Intensity of Fire-fighting Cooling Water

	Tank Type	Water Su, pply Range	Water Supply Intensity			Remarks
			F 16mm water gun		F 19mm water gun
Mobile water-gun cooling	Burst tank	Fixed-roof Tank	Around tk. & full length	0.6 L/s.m	0.8 L/s.m
		floating-roof tk., inner floating -roof tk.	Around tk. & full length	0.45 L/s.m	0.6 L/s.m		If the roof of inner floating-roof tank is of fusible mat., considered as fixed roof tank
	Adj. tank	Un-insulated	Around tk. & half of the tank length	0.35 L/s.m	0.7 L/s.m
		Insulated		0.2 L/s.m
Fixed water-cooling	Burst tank	Fixed roof Tank	Surface area of tank wall	2.5 L/min.m²
		floating-roof tk., inner floating -roof tk.	Surface area of tank wall	2.0 L/min.m²			If the roof of inner floating-roof tank is of fusible mat., considered as fixed roof tank
	Adj. tank		Half of the surface area of tank wall	1.0 L/min.m²			Calculated as actual cooling area, and shall not be less than half of the tank wall area.

Note:

The water supply specifications for shallow-disc type inner floating-roof tank are calculated as for fixed-roof tank;

(III) Fire-fighting Water Supply Pipeline and Hydrants

7.3.11 Inside process area, tank farms and etc. for big-sized petrochemical enterprise, independent steady high-pressure fire-fighting water supply system shall be installed, whose pressure should be 0.7~1.2 MPa. For other locations employing low-pressure fire-fighting water supply system, the water-supply pressure shall ensure the water pressure at the worst position during fire-fighting not less than 0.15 MPa (calculated from the ground). Low-pressure water supply system shall not be shared with circulating cooling water system.

7.3.15 The installation of hydrants shall be in accordance with following specification:

A. Above-ground type hydrants should be selected preferably;

B. Hydrants should be lay down along road;

C. The distance for hydrants to road side shall not be more than 5 m; the distance to the exterior wall of buildings shall not be more than 5 m;

D. The distance for above-ground hydrants to urban road side shall not be less than 0.5 m; that to highway type double-lane road-shoulder shall not be less than 0.5 m; that to the centerline of single-lane road shall not be less than 3 m;

E. The big-sized outlet of above-ground hydrants shall oriented towards road; in case the location for the hydrants is susceptible to be rammed by vehicles, safeguarding facilities shall be installed all around;

F. Under-ground hydrant shall have noticeable indicator;

7.3.17 For plant locations, the hydrants shall be arranged all around plant, and the interval should not exceed 60m. In case there is fire-vehicle access inside plant, additional hydrants should be installed along the access side.

The hydrants located in the range of 15m away from the tank-wall of combustible liquid tank farm, liquefied hydrogen tank farm, shall not be included in the quantity of applicable hydrants.

(IV) Box-type Hydrants, Fire Water-canon, Water Spraying and Water showering System

7.3.19 This Clause is deleted.

7.3.20 Box-type hydrants should be installed in the neighborhood of heating furnace, Class A gas compressors, hot-oil pump and hot-oil heat-exchanger with the medium temperature above ignition point, less than 30m long hot-oil pump-house and under pipe-racks inside process plant, and the protection radius should be 30 m.

7.3.21 Inside process plant, higher than 15m frame platforms for Class A, Class B process equipment, semi-fixed vertical supply pipe for fire-fighting water should be installed along the ladders, which shall be in compliance with following specifications:

A. Based on the requirements for each story, valved junction connection shall be installed;

B. For platform with the occupancy area less or equal to 50 m², the size of water-supply pipeline should not be less than 80 mm; for platform larger than 50 m², the size not be less than 100 mm;

C. In case the length of frame platform exceeds 25 m, an additional fire-fighting water-supply vertical pipe should be installed along the ladders on the other side; and the interval of fire-fighting water-supply vertical pipe shall not be more than 50m.

7.3.22 High-rise frame and equipment groups for Class A, Class B equipment involving large volume of combustible-gas or combustible-liquid should be protected by fire-fighting water-canon, the distance of the canon to the protected subject should not be less than 15m, the output of water-canon should be around 30~40 L/s, and the spray should be dual purposed type both for direct-flow and spraying.

7.3.23 For special hazardous equipment and locations inside process plant which cannot be protected effectively by fixed water-canon, water showering system or water spraying system should be installed in accordance with following specifications:

A. The duration, reply time and control mode, etc., for the system should be determined based on the characteristic and operating requirments of protected subjects;

B. In case rain-dripping valves are installed close to protected-subjects, fire protection facilities should be installed;

C. The alarm signal of system and the status of rain-dripping valves shall be indicated on fire-alarm control panel in the central-control room;

D. Other requirements shall be in accordance with current state standard “Code for Design of Water-spraying Extinguishing System”.

(V) Fire-fighting Water Pump House

7.3.28 Fire-fighting water pump, pressure-stabilizing pump shall be furnished with standby pump. The capacity of standby pump shall not be less than that of the biggest fire-fighting water pump.

7.3.29 Fire-fighting water pump should be possible to put into operation within 2 minutes after receiving alarm signal. The fire-fighting water pump for stabilizing high-pressure fire-fighting water supply system shall be automatically controlled.

7.4 Low-power Foam Extinguishing System

7.4.2 Fixed foam extinguishing system should be adopted in the following locations:

A. The fixed-roof tank and the inner roof tank with the floating cover of the fusible material; in which the unit volume of tank is more than or equal to 10000m³ for non-water soluble combustible liquid of Class A, Class B or the unit volume of tank is more than or equal to 500m³ for water soluble Class A, Class B combustible liquid;

B. The floating-roof tank with the unit volume more than or equal to 50000m³ for combustible liquid;

C. The tank-farm for combustible liquid which cannot be effectively protected by the mobile fire-fighting facility;

D. The tank farm for combustible liquid located in maze area, where it is difficult for fire-engine to put-out the fire.

7.4.3 Mobile foam extinguishing system may be adopted in the following locations:

A. The tank for non-water soluble combustible gas, whose wall height is less than 7m or whose volume is equal to or less than 200m³;

B. The tank for lube-oil;.

C. The fire disaster resulting from the spilling combustible liquid on the ground or inside oil basin.

7.4.4 Semi-fixed foam system should be employed in the following locations:

A. In-site tank farms of combustible liquid apart from ones covered by Clause 7.4.2 and 7.4.3;

B. The partial locations with biggest fire hazard in plants or units.

7.4.5 For the fixed foam extinguishing system adopted in the tank farm, in case it is difficult to send the foam to the igniting tank within 5 minutes by the manual operation, the control valve on foam mixture pipeline for tank-farm should be remote controlled or program controlled.

7.4.6 For the floating-roof tank with volume more than or equal to 50000m³, automatic fire alarming system shall be adopted; manual operation or automatic control can be adopted for foam extinguishing system. For the floating-roof tank with volume more than or equal to 100000m³, program control shall be adopted for foam extinguishing system.

7.4.7 The design of foam extinguishing system shall be implemented in accordance with relevant specification stipulated in the current state standard “Code for Design of Low-power Foam Extinguishing System”.

7.6 Steam Smothering System

7.6.1 Fixed or semi-fixed steam smothering system should be installed for process plant on the condition that steam supply is available; But it shall not be installed on locations where the application of steam may likely lead to accident.

7.6.4 The arrangement of smothering steam pipeline shall be in compliance with following specifications:

A. Inside a furnace chamber, a return-bend box conveying corrosive material or with plug furnished, fixed smothering steam perforated-tube (herein after refer to as fixed perforated-tube) shall be installed. The steam pipeline for each perforated-tube shall be connected from “Steam Manifold”. The distance for “Steam manifold”to furnace should not be less than 7.5 m; and at least two spare semi-fixed connections shall be reserved.

B. For in-doors less than 500 m², closed-type Class A, B, C pump-house or Class A gas compressor-house, fixed perforated-tube shall be installed along one side wall of the house and at 150~200mm above ground; and adequate semi-fixed connections should be installed on the other side. For other Class A, B, C pump-house or combustible gas compressor house, semi-fixed connections shall be installed inside.

C. In the neighborhood of Class A, B, C equipment, semi-fixed connections should be installed. And in the neighborhood of combustible gas or combustible liquid equipment in which the operating temperature is at or above ignition point, fixed perforated-tube should be installed with a distance not less than 7.5m from its valves to the equipment;

D. For Class A, B, C equipment multi-story frame or united platform for columns, semi-fixed connections should be installed on every story or every two stories.

E. If hose station is placed under the pipe-rack in process plant, in the neighborhood of Class A, B, C equipment located under pipe-rack or near pipe-rack, the semi-fixed connections may be omitted.

F. The valves for fixed perforated-tube or semi-fixed connections shall be placed on noticeable locations, which is safe and convenient to operate.

7.7 Installation of Extinguisher

7.7.1 The extinguishers for production area should be dry-powder type or foam type, but for instrument room, control room, computer room, telecommunication station, laboratory room and so on, carbon-dioxide type extinguishers should be installed.

7.7.2 The specifications of unit extinguisher installed in production area shall be selected from the models indicated in Table 7.7.2.

Table 7.7.2 Specification of Extinguisher

Extinguisher Type		Dry powder (sodium-hydrogen-carbonate		Foam Type (Chem. Foam)		Carbon-dioxide
Extinguisher Type		Portable	Wheeled	Portable	Wheeled	Portable	Wheeled
Capacity of Extinguishant	Vol. (L)			9	65
Capacity of Extinguishant	Wt. (kg)	8	35, 50			7	25

7.8 Fire Alarming System

7.8.2 Telephone fire alarming system shall be in compliance with following specifications:

A. Grade I and Grad II fire-fighting station shall be furnished with alarm-receiving record telephones, which can handle fire alarm in case there are fires on not-less-than two locations at the same time.

B. Fire-fighting substation, production control center, fire-fighting pump house should be furnished with fire-alarm receiving and monitoring telephone.

C. Special-use fire-alarming telephone shall be installed inside control room for process plants and transportation/storage facilities.

7.8.4 The manual press-button alarming system should be installed inside Class A and Class B the plant and all around the tank farm in big-scaled petrochemical enterprise.

7.8.5 The panel for smog-detector, temperature-detector, flame-detector and other automatic alarms shall be installed inside control room or operating room for protection area.

7.9 Fire-fighting for Liquefied Hydrocarbon Tank Farm

7.9.2 For liquefied hydrogen-carbon tanks over 100m³, fixed fire cooling water system or fixed water-canon, and mobile water supply system for fire-fighting cooling shall be installed. In case the volume of tank is below or at 100 m³, fixed fire cooling water system or fixed water-canon can be omitted. The mobile water supply system for fire cooling shall be capable to meet the total demand of cooling water for fire-fighting.

7.9.4 A The installation of fixed fire-fighting cooling water supply system for full-freezing liquefied hydrocarbon tank should be in accordance with following:

A. The fixed showering device should be applied for the cooling of tank roof, but the fixed water-canon should be adopted for the cooling of tank wall;

B. The cooling water supply intensity for the tank roof of burning tank and the neighboring tank should not be less than 4L/min.m², the cooling area should be calculated based on the surface area of tank roof;

C. The cooling water supply strength for the tank-wall of the burning tank and the neighboring tank should not be less than 2L/min.m². The cooling area of the burning tank should be based on the surface area of tank; and the cooling area of the neighboring tank should be based on the half of surface area of tank.

7.9.7 For fixed fire cooling water system, water showering type or spraying type may be adopted; in case the carbon deposits on the tank wall while the stored material is burning, water spraying cooling system shall be installed. Water showering system can be ejection type, perforated tube type, or tank-roof multi-tooth weir type, etc.

The sprayer of the fixed water-canon shall be direct-flow water spraying ejector and be 15~40m away from the tank wall. The cooling water consumption for fixed water-canon shall be increased from the calculation figure based on Clause 7.9.4 and should not be less than 1.15 times of the calculated values.

7.9.8 When the water spraying is adopted for fixed fire-fighting cooling water system for tanks, the sprayers should be installed to protect the valves, the level guages and the safety valves on the tank; in case water showing is adopted for fixed fire-fighting cooling water system for tanks, auxiliary protection measures such as the water showering sprayer, mobile fire-fighting cooling water system should be installed.

7.9.9 The installation of fixed fire cooling water pipeline shall be in compliance with following specifications:

A. For storage tanks over 400 m³, there should be two vertical supply pipes of fire-fighting water, which should be arranged symmetrically; In case adopting tank-roof multi-tooth weir showing system, there may be one water supply vertical pipe;

B. The control valves of fire cooling water system should be placed outside of fire-dike and be 15m away from the tank wall; the valves may be maually controlled or remote controlled; and after valves, pipe strainers with by-pass valve should be installed;

C. The pipe after the control valve and the tube on the storage tank shall be of galvanized pipe.

7.9.10 For mobile fire cooling water system, water gun or mobile water canon may be adopted.

7.10 Fire-fighting for Oil Loading Jetty

7.10.1 The fire-fighting facilities for oil loading jetty shall be capable to put out fires due to oil leakage in the loading area, to provide protection for heat radiation for production facilities in loading area or to provide fire-fighting help for anchored oil-tankers

7.10.2 The installation of fire-fighting facilities for Class A, B oil loading jetty shall be in compliance with following specifications:

A. River type oil-jetty for the oil tanker with tonage of 1000 t and more or coastal type oil-jetty for the oil tanker with tonage of 3000 t and more, shall be furnished with fixed type or semi-fixed foam fire-fighting system; the foam mixture supply intensity should not be less than 30 L/s;

B. River type oil-jetty for the oil-tanker with tonage of 5000 t and more or coastal type oil-jetty for the oil-tanker with tonage of 20000 t and more, shall be furnished with fixed foam extinguishing sytem with the foam mixture supply intensity not less than 60 L/s; and and should be furnished with two fixed dual-purpose canons both for water and foam, whose ejecting intensity should not less than 30 L/s; for coastal type oil-jetty for the oil-tanker with tonage of 50000 t and more, the fixed dual-purpose canons should be elevated and remote controlled;

C. The continuous supply duration for mixture should not be less than 0.5h, but the supply time for fire-fighting water should not be less than 2h; in case installing water curtain, the water consumption for fire fighting should include the water consumption for water curtain.

7.10.3 A coastal jetty for Class A and Class B oil products, in case it is for the oil-tanker with the tonage of 35000t and more to anchor, water curtain protecting against the heat radiation should be installed in accordance with following regulations:

A. The water curtain should be installed on the front of the jetty, the length of water curtain should be extended by 5m on both ends of loading facility.

B. The spraying reach of water curtain should be 1.5m higher than the protected targets.

C. In case the height of water curtain is less than 10m, the unit water consumption per meter should not be less than 100L/min; in case the height of water curtain is more than 10m, the water consumption should be increased by 10L/min as the ejection height increase by 1m.

7.10.4 For coastal type oil-jetty for Class A, B oil, when the oil-tankers with tonage of 35000t and more is anchored in the berths for operation, there shall be fire-fighting ship or dual-purposed tug-boat in the nearby for the supervision and monitoring.

7.11 Fire-fighting in Building

7.11.2 The intallation of fire-fighting system in buildings should be determined by the danger comprehensively considering fire hazard, operating conditions, property of material, volume of buildings and the installations, etc. of outside fire-fighting facilities.

7.11.3 The installation of indoor hydrants in the production building handling the combustible liquid and gas should be in accordance with following requirements:

A. In case the length of multi-storey or single-storey production building is more than or equal to 30m, hydrants should be installed;

B. Semi-fixed fire-fighting vertical pipe should be installed on the staircase house in multi-storey Class A and B production building; connection joints for water hose should be installed on each floor; fire-fighting vertical pipes should be installed on outdoors locations convenient to operate;

C. The water gun equipped for hydrants should be dual-purposed, both for direct flow- and water spray.

7.11.4 The fire-fighting for control room involving computer control for process plants and units, shall be in accordance with following requirements:

A. The fire-resistance classification of building, the design of internal decoration and air conditioning shall be in compliance with the relevant regulations stipulated by the current national standard “Code for Design of Building Protection” and “Fire-prevention Code of Internal Decoration Design”;

B. In case control room is constructed with the other buildings, separate fireproofing partition shall be made;

C. Automatic alarm system for fire hazard shall be installed; the alarm panel shall be installed in the operation room.

D. In case it is possible for the combustible gas to accumulate nearby the inlet for cable ditches, gas detector shall be installed;

E. Portable gas extinguisher or wheeled extinguisher shall be furnished.

7.11.5 As for single-storeyed warehouse storing artificial fiber, synthetic rubber, synthetic resin and plastic, sulfur, ammonia, in case the building area is more than the regulations stipulated in the current national standard “Code for Design of Building Fire Protection”, automatic alarm system or TV monitoring system for fire hazard, and indoor hydrant system shall be installed;

Both TV monitoring system and automatic alarm system for fire hazard shall be installed in the warehouse storing the flammable synthetic fiber such as acetate fiber, rayon fiber, nylon, polyester fiber; in case the span of warehouse is more than 30m, elevated water-canons shall be installed in addition.

8 Electric

8.1 Power Supply and Power Distribution for Fire-prevention

8.1.1 The power supply for fire-fighting electric equipment in fire water pump house shall be in accordance with the requirements of Grade I power load stipulated in the current state standard “Code for Design of Industrial and Civil Electric Power Supply System”.

8.1.3 For critical fire-fighting electrical equipment, automatic switch shall be realized at the last distribution device or the distribution box for power supply. Fireproofing cable should be adopted for the power distributing line.

8.2 Lightning

8.2.1 The classification of lightning and lightning installation for buildings and structures in process plant shall be in accordance with the relevant specifications in current state standard “Code for Design of Building Lightning”.

8.2.3 The steel storage tank for combustible gas, liquefied hydro-carbon, combustible liquid must be grounded for lightning, and in compliance with following specifications:

A. The protection range of lightning rod, lightning thread shall cover the whole tank;

B. For fixed-roof above-ground tank with fire-arrestor installed for Class AII, B combustible liquid, in case the thickness of roof is at or above 4 mm, lightning rod or lightning thread can be omitted; in case the thickness of roof is less than 4 mm, lightning rod or lightning thread shall be omitted;

C. For Class C combustible liquid tank, lightning rod or lightning thread can be omitted; but grounding device of induction lightning must be installed;

D. For floating-roof storage tank (including inner floating-roof storage tank), lightning rod or lightning thread can be omitted; but the floating roof shall be electrically connected to tank body by two copper cashes, whose section area shall not be less than 25 mm²;

E. For pressure storage tank, lightning rod or lightning thread may be omitted; but it shall be grounded for lightning.

8.2.5 The requirements of electric-resistance for grounding shall be in accordance with the relevant specifications in the current state standard “Code for Design of Petroleum Storage”, “Code for Design of Building Lightning”.

8.3 Static Grounding

8.3.2 In case not specified by the code, the requirements or regulations of the current national standards and codes concerned shall be adhered to.

Appendix A Term Explanation

Term	Explanation
Petro-chemical enterprise	A factory adopting petroleum, natural gas or its products as feed-stock, eg. refinery, petrochemical factory, petroleum chemical fibre factory, etc., or an complex enterprise composed of above factories.
Plant area	An area composed of process plant, storage and transportation unit facilities, utility facilities and other auxiliary facilities, as well as administrative and welfare facilities, etc..
Production area	An area in side the enclosure of a factory, composed by process units, tank groups, loading facilities, filling station, pump house, warehouse, cooling water station, waste-water treatment unit, flare and other process units and facilities, which may release combustible gas or utilize, produce combustible materials; or composed by independent occupancies by tank groups, filling stations, waste-water treatment unit and other facilities.
Liquefied hydrocarbon, LPG	Liquefied hydrocarbon refers to hydrocarbon liquid and other similar liquid whose vapor pressure is over 0.1 MPa at 15 ℃, in which LPG is included. LPG refers to gas mixture of liquefied hydrocarbon, including propane, butane and others with the density being 1.5 to 2.0 times as air.
Plant important facilities	Plant central control room, plant boiler-house and self-equipped power generation station (excluding ashing yard), general transformer and power distribution station, telecommunication station, central-control room for storage and transportation unit of liquefied hydrocarbon and combustible liquid, plant air compression unit, fire-fighting station, fire-fighting pumphouse, central chemical laboratory, headquarter office building, first-aid station, nursing room and other facilities which may likely affect plant production and result in huge damages and casualties.
Location setting off flamming fire or sparkle	In-doors or out-doors naked flame, red-flamming surface, chimney with flying flame, out-doors grounding wheel, electric welding, gas welding (oxygen gas cutting), installation locations of non-explosion-proofing electric switches, etc..
United complex unit	The required conditions for united complex is "start-up and shutdown simultaneously", i.e. two or more than two independent units are closely arranged, and the material is added directly in-between; there is no intermediate storage tank for maintenance; the units are started up or shut down at the same time. In plant overall plot plan, the units are considered as one single unit.
Unit in Petro-chemical Plant	Component of petrochemical plant, i.e. a combination body of equipment, pipelines, instruments, and so on to complete one or several chemical operation according to chemical process. For example, ethylene plant pyrolysis unit, quench oil-washing unit, compression unit, separation unit, cracked gasoline hydrogenation unit, etc.
High pressure	With gauge pressure over 10 MPa through to 100 MPa
Super-high pressure	With gauge pressure above 100 MPa
Process equipment (shortened as equipment)	Generic term of equipment inside refinery plant and petrochemical plant such as vessel, furnace, machine, pump and other mechanical equipment, which is required to complete process progress (reaction, heat-exchange, separation, storage)
Tank group	Centrally arranged one or more storage tanks, enclosed in one fire dike
Tank Farm	Locations for one of more centrally arranged tanks
Flare system	Pressure relieving facilities composed of pipelines, fire-arrestors, separation equipment and flare stack, etc..
Heavier-than-air Flammable gas	Flammable gas with the density at or above 0.97 kg/m³ under standard conditions.
Boiling spill liquid	Viscose hydrocarbon mixtures such as crude oil, which will result in boiling-spill in case there is fire on storage tanks and the bottom liquid vaporizes quickly due to the contribution of heat-wave
Grade I, II Fire-fighting station	Grade I fire-fighting station is such as furnished with 6 or more fire-engines; Grade II station is such as furnished with 4~5 fire engines.
Water dripping system	Water dripping system composed of nozzle, perforated tube, pipe and control valve, etc..
Water spraying system	Composition is similar to dripping system, but the diameter of ejected drop shall be 200~ 400 mm and the drop should have certain amount of dynamic energy to spray to equipment surface and space to block heat radiation, in order to reach the purpose to control or put out fires.
Box hydrants	Outdoors hydrant composed of hydrant, fire hose, multi-purpose spraying water gun and box body, etc..
Foam mixture solution	Aqueous solution composed by foam and water at certain proportion.
Low-power foam	Foam mixture, which can expand to 20 times in volume after intaking air. Commonly used model is 6 times.
Water-soluble combustible liquid	Combustible liquid, which is able to solve with water, e.g., alcohol, ether, aldehyde, ketol and so on.
Non-soluble combustible liquid	Combustible liquid, which cannot be solved in water, e.g. crude oil and petroleum products.
Fixed foam extinguish system	Foam extinguishing system composed of fixed foam station, fixed mixture pipeline and fixed foam generation vessel, and so on.
Semi-fixed foam extinguish system	Foam extinguishing system composed of fire-engine, fire-fighting hose, fixed foam generation vessel connected and so on; or one composed of fixed foam station, fire water hose, foam gun or hooked tube and so on.
Mobile foam extinguish system	Foam extinguishing system composed of fire-engine, fire hose and foam gun or foam hooked-tube, and so on.
Above-level spraying system	Spraying system, in which the foam is spraye, d into from the above of liquid level of storage tank
Under-level spraying system	Spraying system, in which the foam is sprayed into from the bottom of storage tank and the foam rises through the liquid up to the liquid level to cover the surface.

Appendix C

Examples of Fire Hazard Classification for Liquefied Hydrocarbon and Combustible Liquid

Attach. Table 3.1

Class		Examples
Class A	I	liquefied methane, liquefied natural gas (LNG), liquefied chloro-methane, liquefied cis-butene, liquefied ethylene, liquefied ethane, liquefied trans-butene, liquefied cyclopropane, liquefied propene, liquefied propane, liquefied cyclobutane, liquefied neopentane, liquefied butene, liquefied butane, liquefied chloro ethylene, liquefied epoxy ethane, liquefied butadiene, liquefied isobutane, liquefied petroleum gas (LPG), diemethylamine;
Class A	II	Isoprene, isopentane, petrol, pentane, carbon disulfide, isohexane, hexane, petroleum ether, isoheptan, cyclohexane, octan, isooctane, benze, heptane, petroleum naphtha, crude oil, toluene, ethyl benzene, m-xylene, o-xylene, p-xylene, isobutanol, ether, acetaldehyde, epoxypropane, formic ether, ethylamine, diethylamine, acetone, butanal, methylene dichloride, triethylamine, ethene acetic, butanone, vinyl cyanide, acetidin, isopropyl acetate, vinylene dichloride, methanol, isopropanol, alcohol, propyl acetate, propanol, isobutyl acetate, butyl fomiate, pyridine, dichloroethane, butyl acetate, isopenyl acetate, pentyl fomiate, acrylic ester
B	I	propyl benzene, epoxy chloropropane, styrene, jet fuel, kerosene, butyl alcohol, chlorobenzene, ethylenediamine, pentanol, cyclohexanone, ice acetic acid, isopentanol
B	II	--35# diesel, cyclopentane, ethyl silicate, chloroethanol, butyl alcohol, chloropropanol, dimethyl formamide
C	I	Diesoline, heavy oil, phenylamine, spindle oil, phenol, cresol, furfural, 20# heavy oil, phenyl aldehyde, cyclohexaneol, methacrylic acid, ethylene glycol butyl ether, formaldehyde, furfuryl alcohol, octanol, ethanolamine, propanediol, cresol, ethandiol, dimethyl acetamide;<, /FONT>
C	II	wax oil, , 100# heavy oil, oil residue, transformer oil, lubricating oil, diethylene glycol ether, trithylene glycol ether, dibutyl phthalate, glycerine, mixture of diphenyl and diphenyl ether

Appendix D

Examples of Fire Hazard Classification for Class A, B, C Combustible Solids

Attach. Table 4.1

Class	Examples
A	yellow phosphorus, nitrocotton, nitrocellulose film, spraying cotton, touch cotton, celluloid cotton, lithium (Li), sodium (Na), potassium (K), calcium (Ca), strontium (Sr), rubidium (Rb), cesium (Cs), potassium hydride, sodium hydride, lithium hydride, calcium phosphide, calcium carbide, lithium aluminium hydride, sodium amalgam, aluminium carbide, potassium peroxide, sodium peroxide, barium peroxide, strontium peroxide, calcium peroxide, potassium perchlorate, sodium perchlorate, barium perchlorate, ammonium perchlorate, magnesium perchlorate, potassium perchlorate, sodium perchlorate, potassium nitride, sodium nitride, ammonium nitride, barium nitride, potassium chlorate, sodium chlorate, ammonium chlorate, calcium hypochlorite, diacetyl peroxide, dibenzoyl peroxide, diisopropybenzene peroxide, hydrogen peroxide, benzoyl, (o,m,p)-dinitro benzene, 2-dinitrophenol (DNP), dinitro toluene, dinitronaphthalene, phosphorus sesquisulfide, phosphorus pentasulfide, red phosphorus, sodium amide
B	magnesium nitride, calcium nitride, potassium nitrite, potassium persulfate, sodium persulfate, ammonium persulfate, sodium perborate, potassium dichromate, sodium dichromate, calcium permanganate, silver perchlorate, potassium periodate, sodium bromate, sodium iodate, sodium chlorite, iodic anhydride, chromium trioxide, phosphorus pentoxide, naphthalene, anthracene, phenanthrene, camphor, sulphur, iron powder, aluminium powder, manganese powder, titanium powder, carbazole, triformol, rosin, 1,2,4,5-tetramethylbenzene, polyformaldehyde, azodiisobutyronitrile, celluloid, benzidine, thiophene, sodium benzene sulfonate, polystyrene, polyethylene, polypropylene, epoxy resin, phenolic resin, polyacrylonitrile, pentaerythrite, nylon, hexanedioic acid, carbon black, polyurethane, purified terephthalic acid;
C	paraffin wax, pitch, phthalic acid, polyester, plexiglass, rubber and its goods, glass fibre reinforced plastic, polyvinyl alcohol, acrylonitrile-butadiene-styrene plastic, styrene-acrylonitrile plastic, vinyl resin, polycarbonate, polyacrylamide, caprolactam, nylon 6, nylon 66, polypropylene fibre, anthraquinone, (o,m,p)-diphenol, poly-styrene, polyethylene, polyproplene, polyvinyl chloride (PVC),

Appendix E

Examples of Fire Hazard Classification for Process Plant and Units

Section 2: Petrochemical Industry

Attach. Table5.2

Class	Examples
I. Units for basic organic chemical feedstock and products
A	Ethylene and propene unit by tube-furnace (including vertical type, horizontal type and millisecond type etc.）steam cracking process; hydrogenizating unit for cracked petrol; extracting unit for aromatic hydrocarbon; p-xylene unit p-xylene die-methyl ester： epoxy ethane unit naphatha catalytic reforming unit hydrogen production unit cyclohexane unit vinyl cyanide unit phenylethylene unit C₄ extracting butadiene unit butadiene unit by oxidative dehydrogenization of butene ethyne unit by partial oxidatation of methane acetaldehyde unit by direct process of ethylene phenol and acetone unit chloroethylene unit by oxychlorination process from ethylene ethanol unit from ethylene by direct hydration; terephthalic acid unit (purified terephthalic acid unit); methanol synthesis unit acetaldehyde tank and acetaldehyde oxidization unit for a acetic acid plant from cetaldehyde by oxidization propene tank, propene compression unit, chloridization unit, rectification unit and hypochlorination units for epoxy chloropropane plant carbon monoxide tank, hydrogen tank and propene tank, compression unit, synthesization unit, distilling unit, condensationunit, butanal hydrogenization units for butanol carbonyl-synthesis plant carbon monoxide tank, hydrogen tank and propene tank, compression unit, butanal synthesis unit, condensation dewatering unit, hydrogenization unit of 2-ethyl hexenoic aldehyde for isooctyl alcohol carbonyl synthesis plant kerosene hydrogenization unit, molecular sieve dewaxing unit (deadsoption of pentane, isooctane, p-xylene), alkane (C₁₀~C₁₃) catalytic dehydrogenation unit, HF catalytic alkylation unit for alkene (C₁₀~C₁₃）and benzene, storage and transportaation unit for benzene, hydrogen, de-adsorbent, liquefied petroleum gas and light oil etc.; sulphur storage and transportation unit units for detergent powder
B	acetic acid rectification unit, storage tank and oxygen storage tank units of acetic acid plant by oxidation from acetaldehyde acetic oxide plant of acetic acid by cracking neutralization and cyclization unit, storage tank unit of epoxy chloropropane plant distilling refining unit, butyl alcohol storage tank unit of butyl alcohol plant by carbonyl synthesis raw kerosene, dewaxed kerosene, light wax fuel oil storage and transportation unit units of alkyl benzene plant alkyl benzene unit and sulfur trioxide sulphonation unit of detergent powder plant
C	ethandiol evaporation dewatering refining unit, and storage tank unit of ethandiol plant isooctyl alcohol distilling refining unit, and storage tank unit of isooctyl alcohol plant by carbonyl synthesis hot oil（biphenyl + biphenyl-ether）system, neutralization system containing hydrofluoric acid units for alkyl benzene plant unit of alkyl benzene sulphuric acid and caustic soda, synthesization unit of alkyl-benzene sodium-sulfate and additive (carbonyl methyl cellulose, trimeric sodium phosphate, etc..) for synthetic detergent powder plant,
II Synthetic Rubber Industry
A	storage unit of monomers and chemicals, polymerization unit, monomer recovery unit, for butadiene styrene rubber and butadiene nitrile rubber plant; storage unit of monomer, catalyst, chemicals, preparation unit, polymerization unit, storage and mixing unit of latex, coacervation unit, recovery unit of monomer and solvent, for ethylene-propylene rubber plant, isopene rubber plant and 3-polybutadiene rubber plant; vinyl acetylene catalytic synthesis unit from acetylene, catalytic addition unit or chlorobutadiene unit by chloridization from butadiene, polymerization unit, storage and mixing unit of latex, coacervation unit for chlorobutadiene rubber plant;
C	chemicals preparation unit, latex mixing unit, aftertreatment unit (coacervation, drying, packing), storage and transportation unit for butadiene styrene rubber plant and butadiene nitrile rubber plant; aftertreatment unit (dewatering, drying, packing), storage and transportation unit for ethylene-propylene rubber plant, 3-polybutadiene rubber plant, polychloroprene rubber plant and isoprene rubber plant.
III. Resin and Plastic Synthesis
A	ethylene storage tank, ethylene compression unit, catalyst preparation unit, polymerization unit, pelleting unit for high-pressure polyethylene plant storage and transportation unit for butadiene, hydrogen, aluminium butyl, purifying unit, catalyst preparation unit, polymerization unit, solvent recovery unit for low density polyethylene plant; storage and transportation unit for ethylene and chemicals, formulation unit, polymerization unit, alcoholysis unit, filtration unit, solvent recovery unit for low-pressure polyethylene plant; storage and transportation unit for chloro ethylene, polymerization unit for polyvinyl chloride plant storage and transportation unit for ethyne, methanol, formulation unit, vinyl synthesis unit, polymerization unit, rectification unit and recovery unit for polyvinyl alcohol plant; storage and transportation unit for acrylonitrile, butadiene and styrene, pretreatment unit, formulation unit, polymerization unit and coacervation unit for acrylonitrile-butadiene-styrene plastic plant; storage and transportation unit for styrene and acrylonitrile, formulation unit, polymerization dewatering unit and coacervation unit for styrene-acrylonitrile plastic plant; storage and transportation unit for propene, catalyst preparation unit, polymerization unit, flash evaporization unit, drying unit, monomer refining and recovery units for self-continuous polymerization process polypropene plant; and storage and transportation unit for propene, catalyst preparation unit, polymerization unit, alcoholysis unit, washing unit, filtration unit and solvent recovery unit for solvent process polypropene plant;
B	storage and transportation unit for acetic acid for polyvinyl alcohol plant;
C	adulterating unit, packing unit, storage and transportation unit for high-pressure polyethylene plant; aftertreatment unit (extrusion pelleting, packing), storage and transportation unit for low-density polyethylene plant; aftertreatment (drying, packing), storage and transportation unit for low-pressure polyethylene plant; filtration unit, drying unit, packing unit, storage and transportation unit for polyvinyl chloride plant drying unit, packing unit, storage and transportation unit for polyvinyl alcohol plant; pelleting unit, packing unit, storage and transportation unit for self-continuous-polymerizing process polystyrene plant; Drying unit, pelleting unit, packing unit, storage and transportation unit for acrylonitrile-butadiene-styrene plastic and styrene-acrylonitrile plastic plant pelleting unit, silos, packing unit, storage and transportation unit for self-continuous-polymerizing process polystyrene plant; and drying unit, adulteration unit, packing unit, storage and transportation unit for solvent process polystyrene plant;
IV Ammonia Synthesis and After Products
A	synthetic gas（N₂+H₂+CO）preparation unit by hydrocarbon transformation or by partial oxidation, sulfur removal unit, shift conversion unit, CO2 removal unit, copper wash unit, methanation unit, compression unit, synthesis unit, storage tank groups for feedstock hydrocarbon and coal gas for ammonia plant; crystallization or pelleting unit, conveyance unit, packing unit, storage and transportation units for ammonium nitride plant;
B	ammonia freezing unit, ammonia absorption unit, liquid ammonia storage tank unit for ammonia plant ammonia storage tank, urea synthesis unit, stripping unit, decomposition unit, absorption unit, liquid ammonia pump, ammonium-carbonmate pump unit for ammonia-urea plant; nitric acid plant; neutralization unit, concentration unit, ammonia storage and transportation unit for ammonium nitride plant;
C	evaporation unit, prilling unit, packing unit, storage and conveyance unit for urea synthesis plant;

Section 3: Petrochemical Fibre Industry Attach. Table 5.3

Class	Examples
A	storage and preparation unit for catalyst and auxiliary agent, ester exchange unit between dimethyl terephthalate and ethandiol, methanol recovery unit for polyester fibre plant (DMT process); oxidation unit of cyclohexane, fractionation unit of cyclohexanol and cyclohexanone, dehydrogenating unit of cyclohexanol, extractive refining unit of caprolactam with benzene, storage tank of cyclohexane for polyamide fibre plant (nylon 6); storage and conveyance unit of cyclohexane, oxidation unit of cyclohexane, hexanedioic acid generating unit by oxidation cyclohexanol and cyclohexanone, hexyl amine generation unit by hydrogenation of hexanedinitrile for nylon 66 plant storage and conveyance unit, polymerization unit, recovery unit, extraction unit of acrylonitrile, methyl acrylate, vinyl acetate, diemethylamine, isopropyl ether, isopropanol for acrylic fibre plant; extraction unit of sodium sulfocyanate recovery plant, production unit of DMAC; mid-product storage tank unit, vinyl-actate unit by catalytic synthesis from acetylene or ethylene and acetic acid, polyvinyl alcohol unit by alcoholysis from methanol, formaldehyde unit by oxidation from methanol, polyvinyl formal unit by condensation from methanol for vinylon plant; storage and formulation unit of catalyst for polymerization plant,
B	oximing unit of cyclohexanone, Beckmann rearrangement unit for polyamide fibre (nylon 6) plant; ammoniating unit of hexanedioic acid, hexanedinitrile unit by dewatering for nylon 66 plant; store-house for kerosene and sodium hypochlorite
C	condensation polymerization unit, pelleting unit, silo unit, melting unit, spinning unit, filament processing unit, mid-product warehouse, end-product warehouse of p-phthalic glycol ester for polyester fibre plant (DMT process); esterification、polymerization unit of polyester fibre (PTA process) plant; chipping unit, silo unit, melting unit, spinning unit, filament processing unit, storage and conveyance unit for polyamide fibre (nylon 6) plant; salting unit of ethylene diamine adipate, crystallization unit, melting unit, spinning unit, filament processing unit, packing unit, storage and conveyance unit for nylon plant (nylon 66); spinning unit (excluding using NaSCN as solvent), after desiccation unit, filament processing unit, wool topping unit, packing unit, storage and conveyance unit for acrylic fibre plant; melted reeling unit of polyvinyl alcohol, filament processing unit, packing unit, storage and conveyance unit for vinylon plant; tows desiccation unit and dry heat tension unit, filament treatment unit, packing unit and transportation unit for for vinylon plant; esterification unit, polycondensation unit, prilling unit, spinning unit, filament process unit, silos, intermediate warehouse, finished product warehous;

Previous: Fire Prevention Code of Petrochemical Enterprise Design
Next: Construction and acceptance of Cable Lines

Website Designed by Unimaple

Fire Prevention Code of Petrochemical Enterprise Design [Amend 1999]-Engineering-Info Online-SinoEquipment

NATIONAL STANDARD of THE PEOPLE’S REPUBLIC OF CHINA 中华人民共和国国家标准 GB 50160－92 Fire Prevention Code of Petrochemical Enterprise Design [Amend 1999] 石油化工企业设计防火规范

1.0.2 The code is applicable for the fire-prevention design of a new, extension or renovation project for a petrochemical plant based on petroleum, natural gas and its product as feedstock.

3.1.7 Fire-distance between petrochemical enterprise and the adjacent plants or facilities shall not be less than the requirements in Table 3.1.7.

Table 3.2.11 Fire Distance of Overall Plot Plan for Petro-chemical Enterprise

See Table 5.3.3

Full-freesing storage tank

3.2.11A In case taking following fire-proofing measures, the fire-distance specified in

Table 3.2.11 may be reduced by a little:

A the fire-distance for for train loading facilities for Class AII and Class B

liquid may be reduced by 25% but shall not be less than 10m when hermetic

loading system is adopted;

B the fire-distance for for truck loading facilities may be reduced by 25% but

shall not be less than 10m when measures is taken to prevent liquefied hydro-

carbon from being drained locally;

C the fire-distance for fixed-roof tanks may be determined the same as for

floating-roof tank in case nitrogen blanket has been applied for fixed-roof tank;

D the fire-distance for waste-water treatment unit may be reduced by 25%

when oil-separation basin is covered and there exist semi-fixed steam-

smothering system installed;

E For heating furnace, oven and direct-firing equipment, etc., the fire-distance

may be reduced by 25% in case there are inter-lock facilities of combustible-

gas concentration alarmer and steam- smothering screen.

3.4.4 In side train loading area for liquefied hydrocarbon, combustible liquid, the distance from diesel locomotive to pick-arm of another platform shall meet following requirements

3.4.8 In the train loading block for Class A, B, C, the fire-distance between two adjacent loading-arms shall not be less than 10m; but for Class C combustible liquid, it shall not be less than 7m;

4.2.1 The fire-distance of equipment, buildings unless specified in the code shall not be less than the specification in Table 4.2.1.

.

4.2.4 this clause is deleted.

4.2.21 The arrangement of plant control room, power transformer and distribution substation, laboratory room shall be in accordance with following:

4.2.23 The control room for two or more units in a complex plant, the fire-distance to Class A, Class B or direct-firing equipment shall not be less than 25m; the fire-distance to Class C equipment shall not be less than 15m.

4.2.24 The design of combustible gas compressor arrangement and its house shall be in accordance with following:

4.2.25 Liquefied hydro-carbon pump, combustible liquid pump shall be arranged in open-air or semi-open-air. In case placed inside closed pump house, the design of hydro-carbon pump, combustible liquid pump and its house shall be in compliance with following:

4.4.4 The outlet connection of safety valve for combustible gas and combustible liquid equipment shall be in compliance with following specification:

4.5.1 For following load-bearing steel structure, supports, skirts, pipe supports, fire-resistance cover shall be made.

4.5.2 For load-bearing steel structure support, skirt and pipe-support, following position shall be covered with fire-resistance layer:

4.5.3 The duration of fire-resistance for components covered with fire-resistance layer shall not be less than 1.5h. In case applying fire-proofing paints for fire-resistance layer, thick type inorganic fire-resistance paints which is adaptable to hydrocarbon type fire disaster shall be selected.

4.6.5 For floors of multi-story buildings or structures involving combustible liquid measures shall be taken to prevent the combustible liquid from seeping to the lower story.

5.1.4 Where Class A combustible gas or liquid may leaks out, combustible gas alarming detector should be installed.

5.2.5 The total volume of liquid tank group shall be in accordance with following specification:

5.2.7 The fire-distance of adjacent above-ground combustible liquid tanks in a tank group shall not be less than the specification in Table 5.2.7.

Table 5.2.7 Fire-distance of Adjacent Above-ground Combustible Liquid Tank in tank group

5.2.16 For the design of fire-dike and partition-dike, following specification shall be met:

5.3.2 In case liquefied hydro-carbon tank are arranged in groups, following requirements shall be met.

5.3.3 In side the tank groups of liquefied hydro-carbon, combustible gas combustion-supporting gas, the fire-distance shall not be less than the specification in Table 5.3.3.

5.3.7 For cryogenic liquid ammonia storage tank, fire dike shall be installed; the effective volume inside the dike shall be equal to 60% of the volume of the largest one

5.3.7 5.3.7A For full-freezing type liquefied hydro-carbon storage tank in tank-groups, fire dikes shall be installed in accordance with following specifications:

5.4.4 The train and truck loading facilities for liquefied hydro-carbon shall be in accordance with following specification:

5.4.5 The design of combustible liquid jetty, liquefied hydro-carbon jetty shall be in accordance with following specification:

5.9.1 The warehouse for Class A, B and C goods shall be in compliance with following specifications:

6.1.7 The production waste water line inside tank groups shall be furnished with independent discharges and the hydraulic seal pots shall be installed outside fire dike; and between the hydraulic seal pots and fire embankments, conveniently operated cut-off valve shall be installed.

6.1.8 For production waste water pipeline inside Class A, B process plants, vent pipe should be installed at the highest check well for waste-water header or subheader;

7.2.6 A fire-fighting station must be equipped with device to receive fire-alarming signal and communication system; the furnishement shall be in accordance with following:

7.3.6 The fire water demand for one-time fire-fighting shall be in compliance with following specification:

7.3.7 Fire-fighting water demand for combustible liquid tank group shall be in compliance with following specifications:

7.3.8 Fixed or mobile fire-fighting cooling water system shall be installed for combustible liquid above-ground vertical tank; and the supply range, supply intensity and installation mode shall be in compliance with following:

7.3.15 The installation of hydrants shall be in accordance with following specification:

7.3.17 For plant locations, the hydrants shall be arranged all around plant, and the interval should not exceed 60m. In case there is fire-vehicle access inside plant, additional hydrants should be installed along the access side.

7.3.21 Inside process plant, higher than 15m frame platforms for Class A, Class B process equipment, semi-fixed vertical supply pipe for fire-fighting water should be installed along the ladders, which shall be in compliance with following specifications:

7.3.23 For special hazardous equipment and locations inside process plant which cannot be protected effectively by fixed water-canon, water showering system or water spraying system should be installed in accordance with following specifications:

7.3.28 Fire-fighting water pump, pressure-stabilizing pump shall be furnished with standby pump. The capacity of standby pump shall not be less than that of the biggest fire-fighting water pump.

7.3.29 Fire-fighting water pump should be possible to put into operation within 2 minutes after receiving alarm signal. The fire-fighting water pump for stabilizing high-pressure fire-fighting water supply system shall be automatically controlled.

7.4.2 Fixed foam extinguishing system should be adopted in the following locations:

7.4.3 Mobile foam extinguishing system may be adopted in the following locations:

7.4.4 Semi-fixed foam system should be employed in the following locations:

7.4.5 For the fixed foam extinguishing system adopted in the tank farm, in case it is difficult to send the foam to the igniting tank within 5 minutes by the manual operation, the control valve on foam mixture pipeline for tank-farm should be remote controlled or program controlled.

7.4.7 The design of foam extinguishing system shall be implemented in accordance with relevant specification stipulated in the current state standard “Code for Design of Low-power Foam Extinguishing System”.

7.6.1 Fixed or semi-fixed steam smothering system should be installed for process plant on the condition that steam supply is available; But it shall not be installed on locations where the application of steam may likely lead to accident.

7.6.4 The arrangement of smothering steam pipeline shall be in compliance with following specifications:

7.7.1 The extinguishers for production area should be dry-powder type or foam type, but for instrument room, control room, computer room, telecommunication station, laboratory room and so on, carbon-dioxide type extinguishers should be installed.

7.7.2 The specifications of unit extinguisher installed in production area shall be selected from the models indicated in Table 7.7.2.

7.8.2 Telephone fire alarming system shall be in compliance with following specifications:

7.8.4 The manual press-button alarming system should be installed inside Class A and Class B the plant and all around the tank farm in big-scaled petrochemical enterprise.

7.8.5 The panel for smog-detector, temperature-detector, flame-detector and other automatic alarms shall be installed inside control room or operating room for protection area.

7.9.4 A The installation of fixed fire-fighting cooling water supply system for full-freezing liquefied hydrocarbon tank should be in accordance with following:

7.9.9 The installation of fixed fire cooling water pipeline shall be in compliance with following specifications:

7.9.10 For mobile fire cooling water system, water gun or mobile water canon may be adopted.

7.10.1 The fire-fighting facilities for oil loading jetty shall be capable to put out fires due to oil leakage in the loading area, to provide protection for heat radiation for production facilities in loading area or to provide fire-fighting help for anchored oil-tankers

7.10.2 The installation of fire-fighting facilities for Class A, B oil loading jetty shall be in compliance with following specifications:

7.10.3 A coastal jetty for Class A and Class B oil products, in case it is for the oil-tanker with the tonage of 35000t and more to anchor, water curtain protecting against the heat radiation should be installed in accordance with following regulations:

7.10.4 For coastal type oil-jetty for Class A, B oil, when the oil-tankers with tonage of 35000t and more is anchored in the berths for operation, there shall be fire-fighting ship or dual-purposed tug-boat in the nearby for the supervision and monitoring.

7.11.2 The intallation of fire-fighting system in buildings should be determined by the danger comprehensively considering fire hazard, operating conditions, property of material, volume of buildings and the installations, etc. of outside fire-fighting facilities.

NATIONAL STANDARD of THE PEOPLE’S REPUBLIC OF CHINA

中华人民共和国国家标准

GB 50160－92

Fire Prevention Code of Petrochemical Enterprise Design [Amend 1999]

石油化工企业设计防火规范

A the fire-distance for for train loading facilities for Class A_II and Class B