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SH 3047-1993

SH 3047-1993_English: PDF (SH3047-1993)
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SH 3047-1993English145 Add to Cart 0--10 minutes. Auto-delivered. Design specification for occupational safety and health in petrochemical industry [Quasi-Official / Academic version - scanned PDF, translated by Standard Committee / Research Institute in China] SH 3047-1993   SH 3047-1993
 

BASIC DATA
Standard ID SH 3047-1993 (SH3047-1993)
Description (Translated English) Design specification for occupational safety and health in petrochemical industry [Quasi-Official / Academic version - scanned PDF, translated by Standard Committee / Research Institute in China]
Sector / Industry Petrochemical Industry Standard
Classification of Chinese Standard G01
Word Count Estimation 157,176
Date of Issue 1993/1/14
Date of Implementation 1993/6/1
Drafting Organization China Petrochemical Design Institute Beijing
Summary This standard applies to new petrochemical enterprises, expansion, renovation project design.

SH 3047-1993
Design Specification for Occupational Safety and Health in Petrochemical Industry
SH 3047-93
Chief compiler: Beijing Design Institute of China Petrochemical
General Corporation
Approved by: China Petrochemical General Corporation
Ministry of Labor of The People's Republic of China
Beijing 1993
Document of China Petrochemical General Corporation
and Ministry of Labor of the People's Republic of China
Zhong-Shi-Hua (1993) Jian-Zi No. 31
Notice on Issuing the Trade Standards of
Design Specification for Occupational
Safety and Health in Petrochemical
Industry
January 14, 1993
To Subord inated Organizations of China Petrochemical General Corporation and the Department
(Bureau) of Labor (Labor and Personnel)of Provinces, Autonomous Regions , Municipalities Direct
under Central Government, and Independent Organizations of Plan:
The manuscript of Design Specification for Occupational Safety and Health in Petrochemical
Industry, compi led mainly by Beijing Design Institute of China Petrochemical General Corporation,
has been examined and finalized by China Petrochemical General Corporation and the Ministry
of Labor. We duly approve the Design Specification for Occupational Safety and Health in
Petrochemica l Industry (SH 3047-93) as the trade standards of petrochemical industry and put it
into force on the first day of June in 1993.
We authorized the Beijing Design Institute of China Petrochemical General Corporation be
responsib le for the explication and construing of the Specification.
China Petrochemical General Corporation
Ministry of Labor of the People's Republic of China
Contents
1. General Principles
2. Common Rules
2.1 Ordinary Regulations
2.2 Prevention of Fire and Explosion
2.3 Prevention of Lightning and Static Electricity
2.4 Prevention of Corrosion
2.5 Prevention of Falling and Skidding
2.6 Safety Color and Mark
2.7 Prevention of Dust and Toxic Substances
2.8 Sanitary Facilities
2.9 Protection of Radiation
2.10 Prevention of High Temperature, Cold and Humidity
2.1 f Lighting Naturally and Artificially
2.12 Control of Noise and Vibration
3. Selection of Factory Site and Overall Layout
3.1 Selection of Factory Site
3.2 Overall Layout
4. Petroleum Refining Installation
4.1 Catalytic Cracking and Fragmentation
4.2 Delayed Coking
4.3 Catalytic Reforming , Hydrogenation, and Hydrogen Production
4.4 Hydrofluoric Acid Alkylation
4.6 Oxidized Asphalt
4.7 Sulfur Production and Its Tai l Gas Treatment
4.9 Furfural and Phenol Refining
4.10 Clay Refining
5. Chemical Engineering Installation
5.1 Olefins (Olefin Cracking)
5.2 Butadiene
5.3 Ethylene Oxide and Ethylene Glycol (Ethylene Oxidation Method)
5.4 Propylene Oxide and Propylene Glycol (Chlorohydrination)
5.5 Acetaldehyde (One Step Oxidation)
5.6 Acetic Acid (Oxidation of Acetaldehyde)
5.7 Phenol and Acetone (lso-Propylbenzene Process)
5.8 Vinyl Chloride
5.9 Styrene
5:10 Detergent Alkylbenzenes (Hydrogen Fluoride Alkylation)
5.11 Epichlorohydrin and Glycerol
5.12 Phthalic Anhydride (o-Xylene Oxidation Process)
5.13 Mono-Olefin Polymerization (Polyethylene, Polypropylene, Polystyrene, and
Polyvinyl
5.14 Dioleffin Polymerization(cis-Butadiene Rubber, Butadiene-Styrene Rubber,
Butadiene-Acrylonitrile Rubber, andEthylene-Propylene Rubber)
5.15 Acrylonitrile and Acetone Cyanohydrin
5.16. Polyvinyl Alcohol (Ethylene Process)
5.17 Pure Terephthalic Acid (High Temperature Oxidation Process of p-Xylene)
5.19 Polyester
5.20 Nylon 66 Salt
5.21 Butyl and Octyl Alcohols (Propylene Carbonyl Synthesis)
6. Chemical Fiber Installations
6.1 Acrylontrile Fiber
6.2 PVA Fibers
6.3 PET Fiber, PP Fiber and Respinning of Waste Polyester Fiber and Pieces
7. Fertilizer Installations
7.1 Synthetic Ammonia
7.2 Urea
8. Utilities·
8.1 Transportation and storage
8.2 Boiler Room
8.3 Power Supply
8.4 Telecommunication
8.5 Polluted Water
8.6 Maintenance and Rep~ir of Mechanical Equipment, Instrument, and Electrical
Equipment
8.7 Fire Control
9. Organizations of Occupational Safety and Hygiene
10. Capital Investment for Occupational Safety and Hygiene
Appendix A List of Common Relevant Standards and Specifications
Appendix B: Elucidation of Some Words Used in the Document
1. General Principles
1.0.1 This Specification is formulated in order to carry out the guideline of "safety first;
prevention first" to secure the safety and health of the laborers at their work in petrochemical
enterprises and to promote the development of petrochemical industry.
1.0.2 The Specification applies to the designs of new construction, expansion construction, and
reconstruction of petrochemical enterprise.
1.0.3 The design of a main construction proper must be accompanied concurrently with the
design of facilities of occupational safety and health.
1.0.4 The preliminary design document of the construction project must have a chapter
dedicated to the occupational safety and health, whose contents shall meet the requirements
stipu lated in the Regulations on the Contents of the Preliminary Design of Petrochemical Plant of
China Petrochemical General Corporation.
1.0.5 The plan of the preliminary design on the occupational safety and health approved by
the authorities shall be thoroughly implemented in the construction drawings. In case any
principled amendment is needed, it shall apply to the original authorities for approval.
1.0.6 The relevant current standards and regulations of the State shall be abided by during the
implementation of the Specification.
2. Common Rules
2.1 Ordinary Regulations
2.1.1 For the design of engineering project, the risk analysis of the characteristics of the
technica l process and its materials and products shal l be carried out on the basis of the mode
and degree of hazard, and accordingly necessary preventive measures shall be taken.
2.1.2 Research ach ievement shal l be used in the design of engineering project only after it has
been verified by experimental production that the design conditions of occupational safety and
health is satisfied .
2.1.3 The following measures shall be taken in the design of engineering project:
2.1.3.1 The selection of advanced technica l process and equipment to eliminate
or reduce hazard.
2.1.3.2 The measures of alarming , interlocking, and releasing for prevention
from hazard.
2.1.3.3 The adoption of remote control and insulation to prevent the spread of
hazard.
2.1.3.4 The installation of devices of necessary first aid and fire-extinguishing to
reduce accident injury.
2.1.3.5 The raising of mechanization and automation level to improve the
working conditions.
2.1.4 The design of the safety and health for production equipment shall be carried out
in conformity with the General Principles of Design of Safety and Health for Production
Equipment.
2.2 Prevention of Fire and Explosion
2.2.1 The design of fire fighting for petrochemical enterprise shall be carried out in
accordance with the Specifications of Fire-Fighting for Petrochemical Enterprise Design.
2.2.2 The power design of electric devices and instruments located in explosive and
fire hazard environments shall meet the requirements of the Design Specifications of Power
Installation in the Environments with Explosive and Fire Hazards.
The design of bui ldings shall be carried out in conformity with the Specifications of
Design for Building Fire Contro l.
2.2.3 The design of pressure vessels shall be carried out in conformity with Steel Pressure
Vessels, Specifications of Technical Safety Monitoring of Pressure Vessels, Steel Shell-and-Tube
Heat Exchangers. Furhtermore, the design of pressure vessels for oil refinery shall meet the
requirements of the Technical Regulations for Design of Steel Pressure Vessels for Oil Refineries.
2.2.4 The design of pipeline arrangement of the technological installations shall be carried out
in conformity with the General Rules for Designing Pipeline Arrangement in Petrochemical
Enterprises.
2.2.5 For the equipment and pipelines used in the treatment of hazardous materials that easily
solid ify and sedimentate, measures shall be taken to prevent clogging and to facilitate dredging.
2.2.6 The lead-sealed valve and blind plate shal l be marked clearly on the flow chart of
pipelines and instruments.
2.2.7 For the equipment and pipelines in which hazard will be caused when the material flows
back, the automatic shut-off valve, non-return valve, intermediate vessel etc. shall be installed
according to the concrete conditions.
2.2.8 Based on specific situation, measures shal l be taken to prevent the material mixing that
will cause hazard in abnormal conditions.
2.2.9 The corresponding alarm and interlocking devices shal l be installed for the technological
parameter that causes hazard when it goes beyond the normal range.
2.2.10 The adjustment valve shall be located in a safety position when the power or gas supply
of the instrument fails.
2.2.11 For the technOlogical process that may go out of control, one or more of the following
emergency measures shall be taken in accordance with the concrete conditions:
2.2.11.1 To stop the addition of catalyst (initiator).
2.2.11.2 To add the substance that inactivates the catalyst.
2.2.11.3 To discharge the material or to stop the addition .of the material.
2.2.11.4 To relieve the pressure immediately.
2.2.11.5 To stop heating or start cooling.
2.2.11.6 To add a diluent.
2.2.11.7 To add a volatile material.
2.2.11.8 To purge with an inert gas.
2.2.11.9 To interlock with the fire fighting system.
2.2.12 Sufficient discharging area and sufficient rate of ventilation must be secured for
the room used for compressor of combustible gases (including hydrogen) .
2.2.13 The manual valves of the pipelines used for the spraying of cold water, water
screen for fire control, extinguishing steam, inert gas for accident shall be located at the
places that are far from hazardous sites and also convenient for the operation.
2.2.14 The spare pump shall be ready for the pump that will cause hazard when it fails.
2.2.15 The anti-seismic design is carried out in conformity with the Specifications of
Anti-seismic Building Design, General Rules of Anti-Seismic Design for Non-Buried
Pipef in es in Petrochemical Enterprises, and Specifications of Anti-Seismic Design for
Petrochemical Equipment.
2.2.16 The closed circulating sampling system should be adopted for the sampling of
combustible gases of classes A6 and BA.
2.2.17 The installation of combustible gas alarm instrument shall be carried out in
conformity with the Specifications for Design of Fire Control in Petrochemical Enterprises.
2.2.18 The design of torch and discharging system of combustible gases shall be
carried out in conformity with the Design Specifications of Fuel Gas System and
Combustible Gas System for Petrochemical Enterprises.
2.3 Prevention of Lightning and Static Electricity
2.3.1 The design of lightning prevention for buildings and structures shall be carried
out in conformity with the Specifications for Design of Lightning Prevention of Buildings.
2.3.2 The design of static electricity prevention for production area of technological
installations and tank area of storage-transportation system shall be carried out in
conformity with the Specifications for Design of Fire Control in Petrochemical Enterprises,
Specifications of Design of Petroleum Storage Room.
2.3.3 The design of lightning prevention for the technological installations and storage-
transportation system shall be carried out in conformity with the Specifications for Design
of Fire Control in Petrochemical Enterprises, and the General Rules for Prevention of
Electrostatic Accidents...
2.4 Prevention of Corrosion
2.4.1 The measures of anti-corrosion and anti-leaking for the equipment, pipelines,
instruments and meters contacting the corrosive media in the storage-transportation
shall be taken according to the characteristics of the media transferred.
The pipelines for the transportation of corrosive materials should not be buried .
2.4.2 The materials of the tanks, pumps, and pipes used for storage and transportation of
highly corrosive materials, like acids and alkali , shall be selected according to their characteristics.
The ground sur:face, drainage pipelines, and foundation around them shal l be treated for anti-
corrosion.
2.4.3 Safety shielding should be installed around the packing boxes or mechanical
sealing for transportation of the highly corrosive chemicals , like acids and alkalies ,
2.4.4 The corrosive gases or liquids released from the equipment or pipelines shall be
collected and treated and not be discharged carelessly.
2.4.5 The protective measures of isolation, washing, and aeration shall be taken for the
pipelines of the measuring instruments for corros ive media.
2.4.6 Double valves should be used for the discharging of highly corrosive liquids.
2.5 Prevention of Falling and Skidding
2.5.1 Platform for standing, falling-protective rails, safety covers, boards, etc. shall be
installed for the positions of operation, maintenance, adjustment, and inspection, which
are more than 2 m high from the ground and have the risk of falling.
2.5.2 The design of ladder, platforms, and rails shal l be carried out in conformity with
the relevant standards of Fixed Type Vertical Steel Ladders, Fixed Type Inclined Steel
Ladders, Fixed Type Industrial Protective Rail, Fixed Type Industrial Steel Platform, etc.
2.5.3 The measures for prevention of slipping shall be taken for the ladders, platforms,
and passage ways of slip surface.
2.4.4 The opening of each vertical ladder of each platform layer sha ll have the device
for the prevention of falling down of operator; vertical ladders of neighboring layers shal l
be staggered.
2.5. 5 The frequently operated valves should be located in places convenient for
operation.
2.6 Safety Color and Mark
2.6.1 All the places and equipment where accident easily takes place and life hazard
may be caused shall have the safety mark made in conformity with the Safety Signs.
2.6.2 All the places that need to be noticed quickly and noticed in order to prevent
accident shall be painted with safety colors. The safety color shall be selected according
to the Safety Colors and Guiding Principles of Selection of Safety Colors.
2.6.3 When many valves are located relatively close together and easily mistaken one
another so as to lead to accident, the name and mark of the medium transferred or a
clear sign shall be made beside the valve .
2.6.4 At all the emergency passage ways and exits of production site and workshop,
clear signs or arrows shall be made.
2.7 Prevention of Dust and Toxic Substances
2.7.1 The design of the prevention of dust and toxic substances may take the following
measures, on the premise of satisfaction of the technological requirements and the
characteristics of damage.
2.7.1 .1 To use no or smaller amount of toxic substance; to replace toxic
substance by non-toxic substance; and to substitute highly toxic substance with lower
one.
2.7.1.2 To operate in a closed system, under vacuum, or in a wet condition. To
ventilate partially and remove toxic substance and dust at the releasing outlet of the toxic
dust where the closed system do not apply.
2. 7 .1.3 The system of ventilation to remove the toxic substance and to clear the
dust shall be provided in order to make the environment of the operation site and its
neighborhood up to the sanitary standards. If necessary, the mechanical ventilation may
be added in order to secure that the clean fresh air is sent to the operation site or the
zone for workers to breathe.
2.7.1.4 To set up the detect-alarm system to discover the hazard in time.
2.7. 2 The interior surfaces of the operation room or factory house, where the smoke ,
dust and fiber particles easily settle, should be smooth and with less angles and corners.
2.7.3 The bulk toxic or hazardous materials should be loaded, unloaded and
transported in a closed system.
2.7.4 No open channel shall be used for discharging of the waste water or liquid
containing volatile toxic substances.
10
2.7.5 Pipelines of non-potable water shall be strictly prohibited to be connected with
the pipelines of potable water.
2.7.6 The sampling of occupational contact toxic substances of extremely hazardous
(class I) or highly hazardous (class II) shall be carried out in closed system.
2.7.7 The toxic gases released from the tanks (including the tanks in the installations)
of volatile toxic materials shall be recovered or treated.
2.7.8 In the places where the toxic liquids leak easily, the floor shall be made of non-
permeable building materials and the cofferdam shall be formed.
2.7.9 No glass liquid level gauge shall be used for the occupational contact toxic
substances of extremely hazardous (class I) or highly hazardous (class II) or for the high
temperature and highly corrosive materials.
2. 7 .1 O No pipelines for toxic materials, corrosive media, and waste water shall pass
through the living quarters or the area where the production management is located in a
high density of people.
2. 7 .11 The installation for prevention of environmental pollution shall be made for the
loading and unloading of liquid chlorine and ammonia. The use of rubber tube for loading
and unloading of liquid chlorine is strictly prohibited
2.7. 12 The operation platform used for the occupational contact toxic substances of
class I or class II which may leak should have a inclined ladder leading to the ground.
2. 7. 13 The waste water pool containing volatile toxic materials shall be tightly closed,
and the gases released there shall be treated and discharged into the upper air
2.7. 14 The handle of the valve switch in the valve wel l where toxic gas will accumulate
shal l be located above the ground.
2.7.15 The pump house transferring extremely toxic substances (such as acrylonitri le
and hydrogen cyanide) shall be separated from other pump houses.
2.7.16 The sound-proof room of the pump house with irritating gas shall have a door
facing towards the open ai r.
2.7.17 For the packing and transportation of the solid end products in the factory house,
the fork truck driven by storage batteries should be used.
2.7 .18 The monitor-alarm of toxic substances should be installed in places where the
occupational contact toxic substances of extremely hazardous (class I) or highly
hazardous (class II ) will leak easily.
2.7.19 In the loading and unloading places where the dust may be beyond the
permitted limits of the standards, the air supply connector of helmet type draft inlet
should be used.
]]
2.8 Sanitary Facilities
2,8.1 The sanitary rooms, living rooms, and sanitary rooms for female workers shall be
arranged in conformity with the regulations of the Sanitary Standards for Industrial
Design according to their production characteristics and practical needs.
2.8.2 In the places where the strong acids, alkalies and/or toxic substances easily
penetrating through the skin (e.g . tetraethyl lead, acryionitrile, hydrogen cyanide,
acetonitrile , dimethylformamide, phenol, etc.), the shower for the human body and eye
washing device shall be installed.
2.9 Protection of Radiation
2.9.3 The design of operations of ionization radiation and non-ionization radiation shall
be carried out in conformity with the standards of Reguf at ion for Radiation Protection,
Basic Standards of Hygiene Protection of Radiation, Hygiene Standards of Ultrahigh
Frequency Operation Sites, etc.
2.9.4 The safety signs shall be made in the neighborhood of the radiation source.
- 2.10 Prevention of High Temperature , Cold and Humidity
2.10.1 The design of prevention of high temperature, cold and humidity shall be carried out in
conformity with the Hygiene Standards for Industrial Design.
2.10.2 The design of heating and ventilation shall be carried out in conformity
with the Specifications of Design of Heating, Ventilation and Air Condition for Petrochemical
Enterprises.
2.10.3 The measure of local cooling should be taken when it is inconvenient to install
the heat-insulating device or the hygiene requirement is not satisfied with the installed
heat-insulating device.
2.10.4 The facili ty of drinking water supply shal l be provided in the factory.
2.10.5 The height of the sampling outlet shall not be higher than 1.3 m from the ground
or platform where the operator stands. The sampling of high temperature materials shall
be cooled.
2.10.6 Heat-insulating layer shall be made for the protection of scald when the surface
temperature of the equipment and/or pipelines exceeds 60°C when they are located
within:
2.10.6.1 The height of 2.1 m from the ground or working platform.
2.10.6.2 The distance of 0.75 m from the operating platform.
2.10.8 The factory house where large quantities of moisture is produced shall have the
facilities of ventilation and dehumidification; and the water dropping from the ceiling and
the accumulation of water on the floor shall be prevented, too.
12
2.11 Lighting Naturally and Artificially
2.11.1 The design of lighting naturally and artificially in the factory for production,
accident, and service shall be carried out in conformity with the Design Standards for
Industrial Natural Lighting and the Design standards for Industrial Artificial Lighting.
2.11.2 The dazzling shall be reduced in the places of main operation posts and cat
ladders.
2.11.3 The switches of lighting shall be located in the positions convenient for the users
and easily recognized.
2.12 Control of Noise and Vibration
2.12. f The design of noise control shall be in accordance with the regulations of the
Specifications for Design of Industrial Noise Control.
2.12.2 The noise limits of all kinds of positions in the factory shall meet the values
stipulated in Table 2.1 2.2.
Noise Limit Standards on Different Locations of Factory Table 2.12.2
No. Location Noise Limit
dB
1 Workshop and operation site (continuous noise for 8 hours I day I 90
worker)
2 Guard 's room and control room of workshop 65
3 Computer room, precision processing workshop (at normal working 70
state}
4 Office, laboratory, meeting room and high-noise control room of 70
workshop
5 Main control room , switchboard room , fire hazard quard's room 60
6 Office, meeting room, design room, central control room (including 60
. testinq. analysis and meterinq ) , library, and data information room
7 Clin ic, classroom, nursery, kindergarten, and worker's night shift 55
room
8 Teleconference room 50
Note: (1) In case that the worker is exposed to noise less than 8 hours/day, the noise limit is
determined by the exposure time according to the principle of adding 3 dB to the noise limit for
one half of the exposure time. - ') L( c., - " \.-< 1i..
(2) The noise limits in the table are the indoor background noise levels except No.1 and 3.
(3) The indoor background noise levels listed in the table indicates the average noise
level of the noise that enters from outside into the room through the wal l, doors and windows
(doors and windows are in the normal case of opened and closed).
2.12.3 The equipment of low noise level shall be selected ; and, if necessary, the
measures of sound muffling , sound insulation , sound absorption, vibration insulation or
comprehensive control may be taken.
13
2.12.4 For the design of pipeline and the selection of type of adjustable valve, the
prevention of vibration and noise is to be satisfied, the cross-section of the pipeline
should not be changed suddenly, and certain flexibility shall be required in the
connection of the pipeline with the equipment of strong vibration.
Sound insulation and muffling shall be taken for the pipelines that radiate high
noise.
2.12.5 For the place used for constant observation and monitoring of the operation of
the equipment, the sound-insulated room shall be used if the noise-lowering treatment is
not applicable .
2.12.6 The muffler shall be installed in appropriate positions of the inlet and outlet of
the gas dynamic machine with strong vibration and impact if the inlet and outlet are
widely open.
2.12. 7 The foundation of the mechanical equipment with strong vibration and impact
shall be constructed independently with the measures taken for lowering the vibration
and noise.
2.12.8 Muffler shall be installed on the exhaust outlet with a noise level beyond the
standard limits.
14
3. Selection of Factory Site and
Overall Layout
3.1 Selection of Factory Site
3.1.1 The locations of the production area, living quarters, source of potable water, dock, land
used for piling or burying of solid waste, and the discharge point of industrial waste water shall be
determined and rationalized simultaneously and shall meet the standards and specifications of
the Standards of Hygiene Design for Industrial Enterprise and the requirements of local
construction plans.
3.1.2 The following area shall not be selected for the site of a factory:
3.1.2.1 The seismic area of earthquake fault and of basic intensity over IX.
3.1.2.2 The regions of seriously saturated-yielding loess, newly piled loess of great
thickness, highly compressible saturated loess, etc.
3.1.2.3
karst cave, etc.
The seriously hazardous area with mud-rock flow, landslip, shifting sand,
3.1.2.4 The lower reaches of a reservoir which is not absolutely safe.
3.1.2.5 The area of endemic.
3.1.2.6 The region of high radioactive background.
3.1.3 The reliable measures of flood control (diking and draining) must be taken for the site
selected in the area of flood or water logging.
The area of low pollution back ground and good diffusion conditions should be selected fo r
production area. The area located in the leeward of least frequent wind in the year shall be
selected for living quarters.
3.1.5 The health protection distance between the petroleum refinery and the living quarters
shall meet the regu lations of the Health Protection Distance for Petroleum Refinery. The health
protection distance between the petrochemical plant and the living quarters shall be determined
by the approva l document of authorities for the assessment of the environmental impact within
the heath protection distance, no house for living shall be built and afforestation shall be made.
3. 2 Overall Layout
3.2.1 The overall layout of the factory shall be made according to the functions of the technical
production line and the characteristics of their unit operations, category of toxicity, severity of fire
hazard in combination with the topography, wind directions, etc.
3.2.2 The overali layout of the factory area shall meet the following requirements:
3.2.2.1 The units producing relatively hazardous toxic gas, smoke, fog, dust, etc. should
be located in the area in the windward of the least frequent wind in the year.
15
3.2.2.2 The units producing relatively high level noise or the noise sources should be
located far from the area which requires low noise level.
3.2.2.3 The tank group of liquefied hydrocarbons or combustible liquids should be
arranged in the area that is lower than the site of technological installation, the important facilities
of the plant and the places where are many people.
3.2.2.4 The air separation station shall be located in the area of relatively clean air,
and its air inlet shall lie in the leeward of the least frequent wind in the year of the region where
the acetylene and other hydrocarbon gases release.
3.2.2.5 The warehouse of radioactive substances shall be located in the border area
accessed by fewer people.
· 3.2.2.6 The location of the fire control station shall meet requirements of the
Specifications of Design of Fire Fighting for Petrochemical Enterprise.
3.2.2. 7 The roads in the factory shal l be arranged in such a way that the flow of people
and vehicles may be rationalized and the requirements of fire fighting are satisfied. The main
roads of high flow of people and vehicles shall avoid the crossing of busy railroad .
3.2:2.8 The units with high flow of vehicles should be arranged at the border area.
3.2.2.9 The overall layout and individual unit layouts shall create good conditions for the
facing , natural lighting , and natural ventilation of the buildings.
3.2.3 The measures for prevention of landslip and caving shall be taken for the region that is
thickly filled or deeply excavated.
3.2.4 The design of road, railroad and loading and unloading facilities in the factory shall meet
the regulations of relevant standards of the Specifications of Design of Road for Factory and
Mining, Specifications for Design of Standard Rail Distance Railway for Industrial Enterprise,
Specifications for In-Factory Transportation Safety for Industrial Enterprise, etc.
3.2.5 The design of afforestation in the factory shall be carried out in conform ity with the
Specifications of Design of Afforestation Area in Factory for Petrochemical Enterprise.
16
4. Petroleum Refining Installation
4.1 Catalytic Cracking and Fragmentation
4.1.1 The linear distance between the outlet of the turbine and the inlet of the main fan shall
not be less than 10 rn.
4.1.2 The loading and un loading of catalysts and combustion adjuvant should be carried out in
closed pipel ine system.
4.1.3 For the loading of passivating agent, the suction method shal l be used.
4.2 Delayed Coking
4.2.1 The heating furnace shall be located at the coke tower where is windward of the least
frequent wind in the year. The chimney outlet of the heating furnace shall be 3 m higher than the
top of the coke tower when the distance between the ch imney of the heating furnace and the top
of the coke tower is le...