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SH 3047-1993

Chinese Standard: 'SH 3047-1993'
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SH 3047-1993English195 Add to Cart 0--10 minutes. Auto immediate delivery. Design specification for occupational safety and health in petrochemical industry [Quasi-Official / Academic version - scanned PDF, translated by Standard Committee / Research Institute in China] Valid SH 3047-1993

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Detail Information of SH 3047-1993; SH3047-1993
Description (Translated English): Design specification for occupational safety and health in petrochemical industry
Sector / Industry: Petrochemical Industry Standard
Classification of Chinese Standard: G01
Word Count Estimation: 157,000
Date of Issue: 14/1/1993
Date of Implementation: 1/6/1993
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 less than 15 m.
4.2.2 The blown gas from the coke tower and the discharged gas from the cold coke sha ll be
sent into the recovery system.
4.2.3 In the operation room on the top of the coke tower, the measures of heat insulation and
cold prevention shal l be taken. And, a direct telephone for communication between the
installation control room and the high pressure water pump house shall be set up.
4.2.4 The fire control equipment of fire extinguishing steam jet nozzle and so forth shall be
installed at the vicinities of the four-way valve and the top of coke tower.
4.3 Catalytic Reforming, Hydrogenation, and Hydrogen Production
4.3.1 The acoustic and light alarm system and interlocking operation turn-off device shal l be
installed for the compressor of fresh hydrogen, compressor of recycled hydrogen, material input
pump of the reaction , heati ng furnace of the reaction , etc.
4.3.2 The alarms for high liquid level , low liquid level, and over-pressure shall be set up.
4.3.3 The alarm for over-temperature shall be set for methylation reactor.
4.3.4 The devices of water seal, water spraying , and sunshine protection must be provided for
the tank of sulfur dioxide and its metering tank. The water pool and water flushing device shall be
installed for the keeping of carbon disulfide drum.
4.3.5 The discharge outlet of sulfur-dioxide-elimination in hydrogen production shall be 3 m
higher than the highest part of the installation.
4.3.6 Measure shal l be taken in the hydrogenation installation for the prevention of high
pressure system material entering into the low pressure system.
4.4 Hydrofluoric Acid Alkylation
17
injection into the tower top, reducing the ventilation, and introduction of safety steam shall be
provided.
4.6.2 The device of hood and asphalt splashing defender over the feeder of the asphalt
molding machine shall be installed. On the operation site, movable axial-flow-fan shall be
provided.
4.6.3 For the tail gas, there shall be a closed recovery and treatment devices.
4.7 Sulfur Production and Its Tail Gas Treatment
4.7 .1 The safety interlocking system shall be installed for the combustion furnace and
incinerator.
4.7 .2 The gas conta ining hydrogen sulfide stripped from the liquid sulfur shall be sent to the
incinerator for treatment.
4.7 .3 The method of natural open cooling should not be used for molding of sulfur.
4.7.4 The ventilation and dust-removing devices shall be provided for the sites of molding,
metering and packing of the sulfur.
4.7 .5 The win.d vane shall be set up in the installation.
4.7 .6 The sampling of hydrogen sulfide shall be carried out in a closed system.
5.8 Solvent Dewaxing
4.8.1 Nitrogen-sealing shal l be used for the tanks of dry and wet solvent, filtrate , and oil-
containing wax.
4.8.2 The detector and alarm system for oxygen content in the dewaxing filter shall be installed.
4.9 Furfural and Phenol Refining
4.9.1 The storage tank for furfura l and phenol shall use nitrogen-seal or oil seal.
4.9.2 The equipment and pipeline in contact with furfural shal l not be purged with air. The
furfural storage tank shall be corrosion resistant.
4.9.3 The furfura l-containing waste water and oil shall be sent to the recovery tank for
treatment. The recovery tank shall be located at the windward side of the least frequent wind in
the year, and the gas released shall be treated by absorption.
4.9.4 The operator posts of the large-scaled vessel group, frames of various layers , and
sampling outlets of the phenol refining installation shall be provided with water-flushing device.
4.9.5 The low tank for recovery of residual liquid shall be built in the installation.
4.9.6 The sheet padding that contacts phenol shall not be made of copper or aluminum.
4.9.7 A ventilation system shall be installed in the phenol melting workshop.
4.10 Clay Refining
4.10.1 The loading and unloading of clay shal l be conducted in closed system.
19
injection into the tower top, reducing the ventilation, and introduction of safety steam shall be
provided .
4.6.2 The device of hood and asphalt splashing defender over the feeder of the asphalt
molding machine shall be installed. On the operation site, movable axial-flow-fan shall be
provided .
4.6.3 For the tail gas, there shall be a closed recovery and treatment devices.
4.7 Sulfur Production and Its Tail Gas Treatment
4.7 .1 The safety interlocking system shall be installed for the combustion furnace and
incinerator.
4.7 .2 The gas containing hydrogen sulfide stripped from the liquid sulfur shall be sent to the
incinerator for treatment.
4.7 .3 The method of natural open cooling should not be used for molding of sulfur.
4.7 .4 The ventilation and dust-removing devices shall be provided for the sites of molding,
metering and packing of the sulfur.
4.7.5 The wind vane shall be set up in the instal lation.
4.7 .6 The sampling of hydrogen sulfide shall be carried out in a closed system.
5.8 Solvent Dewaxing
4.8.1 Nitrogen-sealing shall be used for the tanks of dry and wet solvent, filtrate , and oil-
containing wax.
4.8.2 The detector and alarm system for oxygen content in the dewaxing filter shall be installed.
4.9 Furfural and Phenol Refining
4.9.1 The storage tank for furfural and phenol shal l use nitrogen-seal or oil sea l.
4.9.2 The equipment and pipel ine in contact with furfural shal l not be purged with air. The
furfural storage tank shall be corrosion resistant.
4.9.3 The furfura l-containing waste water and oil shal l be sent to the recovery tank for
treatment. The recovery tank shall be located at the windward side of the least frequent wind in
the year, and the gas released shall be treated by absorption .
4.9.4 The operator posts of the large-scaled vessel group, frames of various layers, and
sampling outlets of the phenol refining installation shall be provided with water-flushing device.
4.9.5 The low tank for recovery of residual liquid shall be built in the installation.
4.9.6 The sheet padding that contacts phenol shall not be made of copper or aluminum.
4.9.7 A venti :ation system shall be installed in the phenol melting workshop.
4.10 Clay Refining
4.10.1 The loading and unloading of clay shall be conducted in closed system.
19
4.10.2 The filter house shall be provided with local ventilation.
4.10.3 The automatic plate-and-frame filter press should be used for the filtration. Th end
product should be collected in a closed system.
20
5. Chemical Engineering Installation
5.1 Olefins (Olefin Cracking)
5.1.1 The fire control distance between the cracking furnace and other equipment shall be in
conformity with the Specifications for Design of Fire Fighting for Petrochemical Enterprise. The
fire control distance shall not be shortened by means of placing solid wall between them.
5.1.2 The fire extinguishing water or steam screen shall be installed to separate the area of
cracking furnace from the area of other equipment.
5.1.3 The cracking furnace shal l be provided with the alarm system interlocked with automatic
furnace shut-down device. Furthermore, the control devices of emergency shut-down of individual
and all cracking furnaces shall be provided, too.
The fue l gas used in the cracking furnace shal l be separated by condensation.
5.1.4 For the elimination of carbon monoxide by methanation or the elimination of acetylene by
gas phase hydrogenation , the interlocked over-temperature alarm and emergency shut-down
shall be installed.
5.1.5 For the fractional distillation tower, the interlocked system of over-temperature shut-off of
the heating source, and automatic discharging the gases into the torch shall be stalled .
5.1.6 The evaporator shal l be set up for the liquid discharge.
5.1.7 The device for recognition of the combustion of the torch shall be installed in the
installation control room.
5.2 Butadiene
5.2.1 For the production of butadiene by the method of oxyd ehydrogenation of butylene, the
system of ala rm interlocked with automatic shutting-down of the oxydehydrogenation shall be
installed .
5.2.2 For the extractional fractionation system, the device of injection of carbon four alkanes,
olefin fraction, or nitrogen shal l be provided to dilute the concentration of alkynes.
5.2.3 The device for unloading of materials from drum should be located outdoors. Mechanical
ventilation shal l be set up when it is necessary to unload indoors.
5.2.4 The pipeline for transportation of butadiene shal l not be bagged or formed into any corner
pocket, and shall have less elbows and valves.
5.2. 5 The stored butadiene shall contain inhibitor and be strictly isolated from the air, and the
storage tank shall be sealed with nitrogen. Cold water spraying device shall be set up over the
butadiene storage tank.
·5.3 Ethylene Oxide and Ethylene Glycol {Ethylene Oxidation Method)
2 1
5.3.1 For the system of oxidation of ethylene, the interlocked device of alarm with automatic
shut-down and emergency shut-down device shal l be installed. The concentrations of oxygen and
ethylene in the gaseous mixture entering the reactor and the oxygen content in the tail gas exiting
the reactor shall be monitored continuously.
5.3.2 The oxygen inlet tube of oxygen mixer shall be equipped with automatic shut-down
device and an automatic nitrogen purging system.
There shal l be a nitrogen storage for the automatic nitrogen purging system.
5.3.3 There shall be the devices of tower pressure warning, automatic shut-down, and
emergency cut-off for the ethylene oxide refining tower.
5.3.4 For the pumps used for the transfer of ethylene oxide, the device for prevention of idling
and running without output shall be provided. Also, the interlocked devices of over-temperature
warning of the liquid in the pump and automatic shut-down shall be installed .
5.3.5 Protective water spraying shall be fixed in the vicinity of the movable sealing of the
pumps used for the ethylene oxide and the solution of ethylene oxide.
5.3.6 The gaseous ethylene oxide shall be transferred in pipeline only for short distance in the
installation. During the transferring of the liquid ethylene oxide through pipeline betvJeen the
neighboring installations , the pipeline shal l be accom panied with cold sal t water pipe, and there
shal l be no gaseous phase existing in the pipeline.
5.3.7 The nitrogen shall be introduced continuously to the outlet of the safety valve of the
ethylene oxide, and the vent of the safety valve shall be provided with a nitrogen connection pipe.
5.3.8 The gaseous space of the ethylene oxide storage tank shall be filled with nitrogen, and
water-spraying device shall be provided outside the tank.
5.3.9 The filling of tank trucks and cylinders with ethylene oxide shall not be carried out in or
besides the equipment area of the installation. The filling site shal l be provided with the devices of
introducing nitrogen into the tank trucks and cylinders, protective water-spraying , and ground-
washing.
5.3.1 O The storage tank of the ethylene oxide shall be arranged independently, and the
cofferdam shall be made around it.
5.4 Propylene Oxide and Propylene Glycol (Chlorohydrination)
5.4.1 The storage and gasification of liquid chlorine shall meet the following requirements:
5.4.1.1 The vessels for storage of chlorine shall not be placed in the open ai r.
5.4.1.2 The spare tanks used in case of accident shall be provided for the storage tanks
of chlorine. The pipe coming into and going out from the storage tanks shall be equ ipped
with double shut-off valves . The replacing gas shall be treated with alkaline solution.
5.4.1.3 The crane used for the liquid chlorine cylinders or tanks shall have double brakes.
The diluted alkaline solution or lime milk pools for accident treatment shall be provided at
the sites where the cylinders filled with liquid ch lorine are stored.
5.4'.1.4 The liquid ch lorine shall be gasified with gasifiers, which shou ld be the
evaporators of coiled or shel l-and-tube type (Liquid chlorine is gasified in the tube). The
22
gasified chlorine shall pass through surge tank before entering into the chlorination
system
5.4.1.5 The waste discharging and treatment device shall be provided for the liquid
chlorine gasification system.
5.4.2 When electrolytic chlorine is used as the raw material, the monitor-alarm for oxygen
content in the recycled gas pipelines shall be installed.
5.4.3 The emergency shut-down and nitrogen-filling device shall be installed for the system of
chlorohydrination and the system of fractional distillation of propylene oxide.
5.4.4 The room used for preparation of hydrazine dealdehyding solution shall be equipped with
mechanical ventilation.
5.4.5 · Protective water spraying shall be fixed in the vicinity of the movable sealing of the
pumps used for the chlorohydrin solution and propylene oxide.
5.4.6 The propylene oxide storage tank shall be sealed with nitrogen, and water-spraying
device shal l be provided for the outside of the tank.
5.4.7 The dust-removal device shall be provided on the sites where the lime is unloaded and
slaked.
5.4.8 The wind vanes shall be set up in the installation.
5.5 Acetaldehyde (One Step Oxidation)
5.5.1 The alarm, automatic shut-down and emergency cut-off device shall be installed for the
system of ethylene oxidation.
5.5.2 The system of shut-down-and-automatic-nitrogen-purging shall be installed for the
system of oxidation of ethylene. A storage device for the nitrogen used for the nitrogen-purging
shall be provided.
5.5.3 In the pipeline of ethylene and oxygen leading to the oxidizer, the device used to prevent
the back-flow of catalyst solution into the circulat ing compressor or the dry tube shall be installed.
5.5.4 For the pure acetaldehyde tower, the devices of the low temperature alarm of the kettle,
automatic cutting-off of the feed, and stopping the discharging of waste-water shall be set up.
5.5.5 In the control room , there shal l be the device foi checking whether the torch in the
installation is burning or not.
5.5.6 The pipeline transferring the pure acetaldehyde liquid must not be located over the steam
pipeline. When the surface temperature of the neighboring equipment and pipelines is over 140°C,
the whole acetaldehyde pipeline shal l be insulated without any part exposing direct (such as
flange and valve) .
5.5.7 The device of water-spraying shall be fixed in the vicinity of the mechanical seal of the
pump for transferring of the acetaldehyde, unqualified acetaldehyde, and crotonaldehyde .
5.5.8 All the storage tanks for the crude acetaldehyde, pure acetaldehyde, unqualified
acetaldeh'yde, and crotonaldehyde shall be provided with nitrogen-sea\, and their vents shall be
washed with water. Cold water-spraying device shall be set up for the tank outside.
5.6 Acetic Acid (Oxidation of Acetaldehyde)
5.6.1 The room for the preparation of catalysts shall be equipped with mechanical ventilation .
And the floor of the room shall be treated to resist corrosion.
5.6.2 For the system of oxidation of acetaldehyde, the interlocked device of alarm with
automatic shut-down and emergency shut-down device shall be installed.
5.6.3 The top of the oxidation tower shall be filled with nitrogen. The cooling device of cold
water praying should be set up around the tower.
5.6.4 The storage tanks of acetaldehyde and acetic acid shall be sealed with nitrogen. The
acetaldehyde storage tank shall be equipped with cooling device of water-spraying .
5.6.5 The gas released from the storage tank of acetic acid shall be washed with water.
5.7 Phenol and Acetone (lso-Propylbenzene Process)
5.7.1 The storage of aluminum trichloride, preparation of complex compounds , and the feeding
of materials shall meet the following requirements:
5.7 .1.1 The room for preparation of the aluminum trichloride complex compound should
be equipped .with mechanical venti lation. And the floor of the room shall be treated to resist
corrosion.
5.7 .1.2 The feeding of aluminum trichloride sha ll be carried out in a closed system, and
the feeding site should be ventilated mechanically, the floor of the room shall be treated to resist
corrosion, and a cofferdam on the floor shall be bu ilt to be rinsed with water.
5.7.2 The alarm, automatic shut-down and emergency cut-off device shall be installed for the
system of alkanation.
5.7.3 For the system of oxidation of iso-propylbenzene, the emergency measures of alarm and
feeding cut-off must be set up.
5.7.4 For the system of concentrating iso-propylbenzene hydroperoxide, the emergency
measures of alarm and the add ition of diluent into the concentrator shall be taken.
5.7.5 The type selection of the concentrator for iso-propylbenzene hydroperoxide shall satisfy
the following requirements:
5.7 .5.1 The temperature of the heating source shall be lower than the temperature of the
decomposition and explosion of the iso-propylbenzene hydroperoxide.
5.7.5.2 The concentrated solution shall not be held up on the heating surface.
5.7 .6 The intermediate storage tank of concentrated iso-propylbenzene hydroperoxide shall be
equipped with spray cooling device.
5.7.7 For the pumps used for the transfer of concentrated iso-propylbenzene hydroperoxide,
the devices for prevention of idling or running without output shall be provided. Also, the devices
of over-temperature warning of the liquid in the pump and automatic shut-down shall be installed.
5.7 .8 The alarm, automatic shut-down and emergency cut-off device shal l be installed for the
decomposition system of iso-propylbenzene hydroperoxide. And the device used to prevent the
back-flow of the reactant materials shall be installed.
24
5.7 .9 The vent gases from the storage tanks of acetone and phenol shall be recovered and
treated.
5.7.10 The factory house used for filling the drums or tanks shall be equipped with mechanical
ventilation . On the site for filling of phenol drums, the shower for accident and eye flushing
device shall be installed. The local ventilation shall be set up on the site for filling . And the local
vent gas of the site shall be washed with water.
5.8 Vinyl Chloride
5.8.1 The system of direct chlorination of ethylene shall be equipped with the devices of alarm
and emergency shut-down. For the tail gas, the devices of continuous monitor, alarm, and
automatic nitrogen filling shall be installed.
· The vent tube of tail gas shall be equipped with a fire arrester and nitrogen filling
connection pipe.
5.8.2 For the system of oxychlorination of ethylene, the devices of alarm, automatic shut-down
and emergency shut-down device shal l be installed.
5.8.3 For the system of the cracking furnace for dichloroethene, the devices of alarm,
automatic and emergency shut-down of the furnace shall be set up. The inlet pipe of the
dichloroethane from the evaporator to the cracking furnace shall be equipped with nitrogen and
steam pipe connectors.
5.8.4 The storage tanks of crude and refined dichloroethane shal.l be equipped with nitrogen
filling devices.
The exhaust gas from the vinyl chloride tank shall be sent back to the fractiona l
distillation system for recovery. For the non-heat-insulated storage tanks of vinyl chloride, water-
spraying cooling device shal l be installed.
5.8.5 On the ground of the vicinity of the cracking furnace , evaporator, and quenching tower for
dichloroethane, cofferdams shal l be built.
5.8.6 The exhaust gas containing hydrogen ch loride shall be treated with water.
5.9 Styrene
5.9.1 The storage and feeding of aluminum trichloride , and preparation of complex compound
shall be carried out in conformity with the Article 5.7.1 of the Specifications.
5.9.2 For the system of alkanation, the devices of alarm, automatic shut-down and emergency
shut-down device shal l be installed. Also, the discharge tank for accident and the tank for
receiving overflow shal l be set up.
5.9.3 In the equipment, pipelines, and sampling outlets of the system of dehydrogenation of
ethylbenzene, the nitrogen filling pipe connectors shall be fixed.
For the outlet pipe of the compressor of tail gas, the devices of on line monitor for oxygen
content, alarm, and automatic shut-down of the compressor shall be installed.
5.9.4 Tf'le tai l gas of dehydrogenation shall automatically vent through the water seal after the
stopping of the compressor. The water sea l tank shall be provided with the alarm for the high and
25
low water levels; and the vent pipe shall be provided with the fire arrester and nitrogen-filling
connection pipe.
5.9 .5 The preparation of the inhibitor solution of dinitrophenol shall be carried out in a closed
system for additing of materials. The preparation room shall be ventilated and a cofferdam shal l
be built on the ground in the vicinity of the equipment.
26
5.9.6 All the storage tanks of benzene, ethyl benzene, and styrene and all the intermediate
storage tanks of alkylation solution, dehydrogenation mixture, and diethyl benzene shall be
nitrogen-sealed.
5.1 O Detergent Alkylbenzenes (Hydrogen Fluoride Alkylation)
5.10.1 The equipment containing hydrogen fluoride shall be located in one area, around which
cofferdam shall be built and clear signs shall be made. And the neutralization pool for human
body, neutralization pool for tools, flushing pool for human body, and eye-flushing device shall be
provided in this area.
5.10.2 In the area of equipment containing hydrogen fluoride, the design of vertical ladder
retainer and operation platform shall be carried out in conformity with the Article 4.4. 7 of the
Specifications.
5.10.3 ·The equipment and pipelines containing hydrogen fluoride shall spontaneously and
complete ly be drained into the designated receiver tan k.
5.10.4 The emergency shut-down device shall be provided for the alkylation system.
5.10.5 In the installation, a dedicated safety room containing neutralization pool, shower, eye-
flushing device, safety clothes, and first aid box shall be provided.
5.10.6 The wind vanes shall be fixed in the installation.
5.11 Epichlorohydrin and Glycerol
5.11.1 For the system of high temperature chlorination of propylene, the devices of alarm ,
automatic shut-down and emergency shut-down shall be installed.
5.11.2 In the system of hypochlorination of chloropropylene, the device of emergency shut-down
device shall be fixed.
5.1 1.3 On the sites of receiving and slaking of lime, the dust removal device shal l be set up.
5.11.4 The low pressure automatic nitrogen filling device shall be instal led for the saponification
reactor.
5.11.5 The vent pipe for waste gas of chloropropylene shal l be equ ipped with fire arrester, and
connection pipes of nitrogen and fire-fighting steam.
5.11.6 The storage tanks of chloropropylene, crude epich lorohydrin , and epichlorohydrin shal l
be nitrogen-sealed. Their exhaust gas shall be recovered and treated.
The storage tank for the chloropropylene shall be equipped with the water-spraying
cooling device.
5.11.7 The tank-filling of the byproduct hydrochloric acid and D-D mixture shal l not be carried out
in the equipment area of the installation.
5.12 Phthalic Anhydride (o-Xylene Oxidation Process)
5.12.1 For the system of oxidation, the devices of alarm, automatic shut-down and emergency
shut-down 'device must be installed.
27
5.12.2 Rupture disks shall be fixed on the mixer of o-xylene and air, oxidation reactor, switching
condenser, and the material pipelines entering and exiting the oxidation reactor.
5.12.3 The second class desalted water shall be used for washing the tail gas from the switching
condenser.
5.12.4 The cooling and cutting of the phthalic anhydride chips shall be carried out under
nitrogen-sealing. The dust of the exhaust gas shall be removed.
5.12.5 The packing workshops of phthalic anhydride and maleic anhydride shall be provided
with ventilation and dust removal devices.
5.13 Mono-Olefin Polymerization
(Polyethylene, Polypropylene, Polystyrene, and Polyvinyl Chloride)
5.13.1 · The intermediate storage tanks of monomers shall be arranged in the area of
intermediate tanks. The nitrogen-sealing device shall be installed when the storage temperature
is lower than the boiling point of the monomer. The spray-cooling device shall be set up for the
storage tanks without heat insulation.
The vent gas from the tanks shall be treated for recovery of monomer, and then the
exhaust gas is set free or sent to the torch pipeline network.
5.13.2 The initiators and catalysts shal l be stored in the installation in a quantity no more than
that to be used for one day in addition to the amount for buffering. The storage room shall meet
the required temperature and humidity for storage.
5.13.3 The preparation of the solution of Ziegler-Natta catalyst shall satisfy the following
requirements:
5.13.3.1 Storage of alkyl aluminum in the installation is strictly prohibited.
5.13.3.2 The preparation of the catalyst solution shall be carried out under the nitrogen-
sealing .
5.13.3.3 The greasy dirty and washings from the cleaning of the storage tank of alkyl
aluminum and equipment for the preparation of catalyst solution shal l be sent into the receiving
tank.
5.13.3.4 The detector and alarm system for fire hazard shal l be installed in the rooms.
5.13.3.5 In the factory house, the mechanical ventilation shall be provided; a cofferdam
shall be made around the equipment
5.13.4 The polymerization system shall have the following requirement for devices:
5.13.4.1 The alarm and emergency shut-down device shall be installed.
5.13.4.2 The devices of automatic cut-off of initiator (catalyst) and monomer feeding
shall be set up for the continuous polymerization system.
5.13.4.3 For the polymerization reactor, the devices for addition of diluents, cooling
agents, a'.'d terminating agent shall be installed. The terminating agent feeding tank shall have a
low liquid .level alarm.
28
5.13.4.4 For the polymerization reactor, the rupture disk and safety valve should be
arranged in series. And a remote control of emergency pressure releasing shall be used.
5.13.5 The drying and pneumatic transferring system of the resin powder shall meet the following
requirements:
5.13.5.1 The equipment and pipelines shall be grounded electrostatically; the flanges
shall be cross-over connected.
5.13.5.2 The inert gas shal l be used s a medium for the drying and pneumatic
transferring of the resin powder produced by solution or bulk polymerization. The oxygen content
of the inert gas shall be monitored if the gas is to be recycled.
5.13.5.3 The vent gas of the system shall be treated with a dust remover.
5.13.6 · The sufficient area for pressure releasing shall be provided for the factory house of
extruding pelletization, together with the system of fire hazard automatic alarm and water-
spraying extinguisher.
5.13. 7 The equipment and pipelines for pneumatic transferring of the resin powder shall be
grounded electrostatically.
The s·eparator and dust remover shall be equipped with rupture disks and be located out
of doors .
5.13.8 The homongenizing chamber and warehouse system shall meet the following
requirements:
5.13.8.1 The chamber and the house shall be electrostatically grounded, and , for their
interior structures, the measures of prevention of the electrostatic spark shall be taken. If the
interior is coated, the coating used must be able to conduct static electricity.
5.13.8.2 The body of the chamber of warehouse is provided with pressure releasing
device. If the chamber or warehouse is arranged outside the building, the cover may be weakly
linked with the wall.
5.13.8.3 There shall be the device to continuously introduce air into the chamber or
warehouse.
5.13.9 The exhaust gas from the pressure releasing system shall first be treated for removal of
the foam , polymers, and liquid drops, and then sent into the torch pipeline network.
5.13.1 O The following measures shall be taken for the installation of polyethylene production by
high pressure process:
5.13.10.1 The interlocked device of alarm with automatic shut-down must be installed
for the polymerization reactor and the high/low pressure separator.
5.13.10.2 The polymerization reactor and high pressure separator shal l be isolated by
protective concrete walls on the three sides from the equipment or factory house, and the
industrial TV monitor system should be set up there.
5,13.10.3 In the explosion conducting pipe after the rupture disk of the polymerization
reactor and the safety valve of high pressure separator, the device of automatic explosion
inhibitor releasing or automatic water-spraying shali be fixed.
29
5.13.10.4 Vibration analysis shall be made for the pipelines connected with the
compressor, and the measure for the prevention of fatigue shall be taken.
5.13.11 The following measures shall be taken for the installation of polystyrene production by
bulk process:
5.13.11.1 A reliable spare power source shall be provided for the stirrer blades of the
polymerization reactor and for the circulating pump of the heat radiation system.
5.13.11.2 A releasing tank for accident shall be equipped for the polymerization system.
5.13.11.3 The volatiles in the molten polymer shall be removed in vacuum. The vacuum
equipment shal l be interlocked with the pelletizer.
5.13.11.4 The polymer shall be cut into pellets in the atmosphere of nitrogen.
5.13.12 The following measures shall be taken for the installation of polyvinyl chloride
production:
5.13.12.1 The ventilation device for accident shall be installed in the polymerization
factory house.
5.13.:12.2 The high pressure hydraulic cleaning device should be provided for the
polymerization kettle.
5.13.12.3 The monomer shall be stripped from slurry of polyvinyl chloride resin under
vacuum before centrifugal separation.
5.13.12.4 The connection of rupture disk and safety valve shall be in series for the over-
pressure protection of the vessels used for the vinyl chloride monomer.
5.13.13 Local venti lation shall be provided for the site of end product packing.
5.14 Dioleffin Polymerization
(cis-Butadiene Rubber, Butadiene-Styrene Rubber, Butadiene-Acrylonitrile Rubber, and
Ethylene-Propylene Rubber)
5.14.1 The intermediate storage tanks of monomers shall be arranged in the area of
intermediate tanks. The measures for preventing the formation of homopolymer or peroxide shall
be taken in the storage of diolefins ..
5.14.2 The storehouse of the initiators, catalysts , and auxiliaries shall meet the requirements for
the temperature and humidity of the storage. The oxidizing agents and reducing agents shall not
be stored in the same room. The explosive substances, oxidizing agents, and organic peroxides
shal l be stored in the installation in a quantity no more than that to be used for one day in addition
to the amount for buffering.
5.14.3 For polymerization system, the devices of over-temperature and over-pressure alarm ,
emergency cut-off of the feeding , adding of terminating agents, and emergency releasing shall be
installed. The connection of rupture disk and safety valve in series should be used for the over-
pressure protection of the polymerization kettle.
5.14.4 For the recovery of butadiene, the measure for transferring of the oxygen content
unqualifiea recovered monomer into the torch shall be taken.
30
5.14.5 The exhaust gas from the polymerization and the monomer recovery systems shall first be
treated for removal of the foam and separation of the liquid, and then sent into the torch pipeline
network.
5.14.6 For the drying oven, the devices of over-temperature alarm and of introduction of
extinguishing steam or nitrogen shall be provided.
5.14.7 The factory house for post treatment shall be equipped with good ventilation.
5.14.8 The following measures shall be taken for the installation of cis-butadiene rubber
production:
5.14.8.1 The solvent oil shall be stored in the nitrogen atmosphere. The vent pipes of
the breathing valve shall be provided with fire arresters.
·5.14.8.2 The alkyl aluminum shall not be stored in the installation area, and its solution
preparation shall be carried out in accordance with the Article 5.13.3 of the Specifications.
5.14.8.3 The room for the preparation of boron trifluoride etherate shall have mechanical
ventilation.
5.14.9 The following measures shall be taken for the installation of butadiene-styrene rubber
production:
5.14.9.1 Dipropylbenzene peroxide and p-menthane peroxide must be stored in the
room separated from the room used for storage of t-dodecyl mercptan.
5.14.9.2 The site for preparation tank of deoxygenating agent shall have local ventilation.
5.14.10 The tanks of acrylonitrile for production of butadiene-acrylonitrile rubber shall be
arranged at the end of the area for intermediate storage tanks and located at the windward of the
least frequent wind in the year. The exhaust gas shall be recovered or washed.
5.14.11 The following measures shall be taken for the installation of ethylene-propylene rubber
production:
5.14.11.1 The solvents shall be stored with nitrogen-seal. Cold water spraying device
shall provided for the tank outside. The vent pipe of the breathing valve shal l equ ipped with a fire
arrester.
5.14.11.2 The kettle for fractional distillation towers shal l be equipped with the alarm of
temperature, pressure, and liquid level. The non-return valve shall be installed at the solvent inlet
of the technological equipment.
5.14.11.3 For the fractional distillation of dicyclopentadiene, the formation of peroxide
shall be prevented. The rupture disk shall be fixed to the tower kettle for the fractiona l distillation.
5.14.11.4 The preparation and storage of the vanadylic chloride shall satisfy the
following requirements:
(1) The preparation shall be isolated from air and moisture. Over-temperature alarms
shal l be installed for the reactor and distillation kettle. The tail gas and waste gas shall be treated
by absorpti?n.
(2) The storage and transportation shall be protected with nitrogen.
31
(3) The pool of slaked lime milk shall be provided for the site where chlorine cylinders are
located.
5.14.1 1.5 There shall be no sesquialkylaluminum remained in the equipment. The
preparation of solution shall meet the Article 5.13.3 of the Specifications. The storage and
transportation shall be protected by purified nitrogen.
5.15 Acrylonitrile and Acetone Cyanohydrin
5.15.1 No storage tank for hydrocyanic acid shall be located in the installation.
5.15.2 The installation shall include an incinerator to treat the steam containing hydrocyanic acid
vapor, nitri le-containing waste gas, liquid hydrocyanic acid , and nitrile-containing waste water.
The torch shall be equipped with a guide burner, the incinerator shall be provided with
combustion nozzle for hydrocyanic acid. And the industrial TV monitor shall be set up, too.
In the area of the torch or the incinerator, no evaporator for hydrocyanic acid shall be
located.
5.15.3 When the production installation of acetone cyanohydrin is an independent one, the
production shall be arranged close to the acrylonitrile installation so that they may share the
incineration device and the first aid room.
5.15.4 The fixed hydrocyanic acid monitoring alarms shall be fixed in the area of the acrylonitrile
production equ ipment of recovery, refining, torch, incineration, etc.; and in the area of the
cyanohydrin production equipment of the hydrocyanic acid generation, cyanohydrin synthesis ,
cyanohydrin purification, etc. ; and also in the control room and laboratory of the installation. The
patrol workers shall be equipped with portable hydrocyanic acid detect-alarms.
5.15.5 The sampling points fo r hydrocyanic acid shall be located in the places where it is easy to
sample and peop le can quickly leave. The sampling valve shall be locked in a steel box.
5.15.6 The ammoxidation system of propylene shall meet the following requirements:
5.15.6.1 The devices of alarm, automatic shut-down, and emergency shut-down shall
be insta lled.
5.15.6.2 The water pump for cooling the ammoxidation reactor shal l have a reliable
spare power supply.
5.15.6.3 A nitrogen purging pipeline shall be fixed for ammoxidation reactor, and the
gas col lecting chamber and the outlet of pipeline for materials shal l be equipped with steam pipe
connector.
5.1 5.7 On the gas outlet pipeline of the cooler of the quenching tower, an alarm for online
monitoring of the oxygen content shall be set up.
5.15.8 The tai l gas of the absorption tower shal l be discharged into the upper ai r, and the height
of discharging shall meet the requirements of the environmental impact assessment.
5.15.9 The tower for stripping of hydrocyanic acid and the tower of fractional distillation of
acrylonitrije shall have the device for addition of inhibitors. The pump used for the inhibitor shal l
be provided with a reliable spare power supply. The inlet of the safety valve of the tower shall
have a continuous nitrogen-purging device. Shielding-can pumps or magnetic pumps should be
used for the tower system of hydrocyanic acid stripping. When the refining pump house is
32
provided, the mechanical ventilation or ventilation for accident shall be used. In the pump house,
the hydrocyanic acid monitoring alarm and industrial TV monitor shall be set up.
5.15.10 The reactor of addition reaction of hydrocyanic acid to ketone and the neutralization
kettle shall be equipped with alarm and emergency shut-down device.
5.15.11 The towers of acetone recovery and fractional distillation of acetone cyanohydrin
should have over-temperature alarms. For the pumps used in transferring of materials containing
acetone cyanohydrin, the shielding-can pumps or magnetic pumps should be used.
5.15.12 The pipelines of hydrocyanic acid shall have some incline, but shall not be bagged. Less
valves shall be used and corner pockets shall be avoided.
The pipeline for output of liquid hydrocyanic acid shall be accompanied with pipeline of
refrigerated saline.
5.15.13 The tanks of end-product acrylonitrile, end-product intermediate, crude acrylonitrile ,
unqualified product, sedimentation of catalysts, and waste water shall be sealed with nitrogen.
The exhaust gas of their breathing valves must be washed with water.
The tanks of end-product, end-product intermediate, unqualified product, and crude
acrylonitrile shall be equipped with spray-cooling device.
5.15.14 The equipment and pipes made of copper or copper alloy are strictly proh ibited. The
polytetrafluoroethylene padding sheet shall not be used for the equipment and pipelines for the
materials containing hydrocyanic acid.
5.16. Polyvinyl Alcohol (Ethylene Process)
5.16.1 The system of vinyl acetate reaction shall meet the following requirements:
5.16.1.1 The oxygen mixer shal l be designed so that the oxygen, ethylene, and acetic
acid vapor shall be mixed thoroughly without any corner pocket.
5.16.1.2 For the feeding into the synthesis reactor of vinyl acetate, there shall be
oxygen content online monitor, alarm ; and for the mixer, there shall be a device for automatic
introduction of nitrogen.
5.16.1.3 The devices of alarm, automatic stop of oxygen supply, automatic shut-down,
and automatic emergency shut-down shall be installed for the vinyl acetate reaction system.
5.16.1.4 Two safety valves with fire arrester shall be fixed on the top of the synthesis
reactor of vinyl acetate. The discharged gas due to over-pressure shall be sent into the torch
system.
5.16.2 The polymerization reactor of vinyl acetate shall have a temperature monitoring alarm
and the devices for feeding methyl alcohol and polymerization terminators.
5.16.3 The stirrer used for the polymerization of vinyl acetate shall have a reliable spare power
supply. A small electricity generator may be provided, if necessary.
5.16.4 The closed hood shal l be provided for the alcoholyzer to prevent the escape of methanol.
5.16.5 The drying of polyvinyl alcohol should be carried out in slight vacuum. The dryer shall be
fil led with nitrogen .
33
5.16.6 The storage tanks of methyl alcohol, vinyl acetate, methyl acetate, and acetaldehyde
shall be nitrogen-sealed. Their exhaust gases shall be washed with water.
5.16.7 No interruption of the refrigerated saline needed by the atmospheric pressure storage
tanks of acetaldehyde should happen.
5.16.8 The room used for storage of azobisisobutyronitrile shall be provided with the devices of
temperature lowering and ventilation.
5.17 Pure Terephthalic Acid
(High Temperature Oxidation Process of p-Xylene)
5.17 .1 The closed feeding of materials shall be used for the preparation of catalyst solution. The
vessels of tetrabromoethane should not be placed indoors.
5.17.2 The devices of alarm, automatic shut-down, and emergency shut-down shall be provided
for the system of p-xylene oxidation. Also, the device of automatic introduction of oxygen into the
oxidation reactor shall be fixed
For the tail gas of the oxidation reactor, the online monitoring and alarm over the contents
of oxygen and carbon dioxide shall be installed.
5.17 .3 The ru.pture disk shall be fixed onto the crystalizer (slurry tank) of the crude terephthalic
acid.
The devices of online monitor and alarm of the oxygen content of the taii gas, automatic
stopping of air supply and automatic nitrogen-purging shall be installed if the secondary oxidation
is carried out in the first crystallizer.
5.17.4 The storage device of nitrogen shall be set up for the nitrogen purging.
5.17.5 The interlocked devices of alarm, automatic shut-down, etc. shal l be provided for the
hydrorefining system.
5.17.6 The crude and pure terephthalic acids shal l be dried under a siight pressure with an inert ·
gas. The recycled inert gas shal l have the devices of an online monitor-alarm for oxygen content
and the automatic make-up of the inert gas.
5.17.7 The exhaust gas from the tank of the acetic acid system shall be condensed, washed,
and then discharged. The vent pipe shall be equipped with a nitrogen-introducing pipe connector.
5 .. 18 Dimethyl Terephthalate
(Combined Oxidation, Combined Esterification)
5.18.1 The top of the oxidation tower shall have an on line monitor for oxygen content, and an
alarm should be installed.
5.18.2 The tail gas of the oxidation shall be condensed, washed, absorbed by the activated
carbon, and then discharged into the upper air.
5.18.3 An interlocked device for cut-off of methyl alcohol feeding on over-pressuring shal l be set
up.
5.18.4 The waste gas containing methyl alcohol shall be washed and then discharged .
34
5.18.5 The centrifuge house shall have mechanical ventilation. The ventilator shall be explosion-
proof.
5.18.6 The rupture disk shall be fixed onto the melter of dimethyl terephthalate.
When the melter is located under the centrifuge, measure shall be taken to prevent the
leaking of lubricant into the heat insulation layer of the melter.
5.18.7 The ground surface and foundation of the places, where are the dimethyl terephthalate
storage tank, acetic acid storage tank, and the preparation apparatus of the catalyst are located,
shall be treated for corrosion resistance. Also, a cofferdam and a water-washing device shall
be provided.
5.19 Polyester
5.19.1 The storage tank of dimethyl terephthalate shall use jacketed breathing valve. Its exhaust
gas shal l pass through the trap, fire arrester, and then to the vent.
5.19.2 The storeroom of the pure terephthalic acid shall be nitrogen-sealed . The transferring of
terephthalic acid shall use nitrogen as the carrier, and the online monitor-alarm and interlocked
shut-down device shall be fixed on the pipeline for circulating nitrogen.
5.19.3 For the methanol storage tank, the breathing valve and nitrogen-seal shal l be used. The
spray-cooling device shall be made for the outsides of the tank.
5.19.4 the exhaust gas from the safety valve of the ester-exchange reaction kettle and the tail
gas from the condenser of methanol shall be discharged into the upper air...
5.19.5 The extinguishing steam pipe connector shall be installed for each floor of the polyester
factory.
5.19.G All the houses of the polyester factory shall be ventilated mechanically, and the
ventilators shall be explosion-proof. Local ventilation and dust-removing device shall be installed
in the places for the weighing and preparation tanks of powder catalysts , additives and
delustering agents.
5.19. 7 The pelletizers shall be located in a dedicated room free of other equipment. This room
shall lie in a place convenient for transferring the materials outwards. The buttons for start-on and
shut-down shal l be fixed on the side of the pelletizer.
5.19.8 All the pneumatic pipeline and equipment shal l be grounded.
5.20 Nylon 66 Salt
5.20.1 The following measures for the hydrogenation system of benzene shall be taken:
5.20.1.1 The set-up of the devices of alarm and emergency shut-down .
5.20.1.2 The set-up of the device of emergency discharging for hydrogenation reactor.
And devices for discharging the gases into the torch and the liquids into receiving tank in case of
accident.
5.20.2 When the hydrogenation of benzene or adiponitrile uses Raney nickel as catalyst, the
catalyst solution shall be prepared in a dedicated preparation room, and the room shall be
equipped with water-spray extinguishing device. The local ventilation shall lie beside the powder
feeding alloy inlet. The exhaust gas shall be washed.
35
The activated catalyst solution shall be protected by nitrogen; the waste catalyst shall be
treated in a deactivation device.
5.20.3 The tanks of benzene and cyclohexane shall be arranged in the intermediate tank area
and surrounded by a cofferdam. The tanks shall be nitrogen-sealed and the exhaust gas shall be
recovered.
5.20.4. The following measures shall be taken for the system of liquid phase oxidation of
cyclohexane:
5.20.4.1 The devices of alarm, automatic shut-down , and emergency shut-down shall be
set up.
5.20.4.2 The remote control of the emergency stop valve of the feeding pipe shall be
established. The head pipe of air feeding and the head pipe of tail gas shall be equipped with
nitrogen-purging devit;;e. The nitrogen storage device for the nitrogen-purging shal l be provided.
5.20.4.3 Each reactor shall be equipped with the emergency releasing pipeline of
gaseous and liquid phases. The separated gas shall be discharged into the torch pipeline network.
5.20.4.4 The oxidation reactor should be located at one end of the installation and shall
be surrounded by a water-spraying device .
5.20.5 When the cyclohexane is oxidized non-catalytically by partially oxygen-depleted air, the
passivating device of the reactor and the adding device of the passivating agents into the fed
materials shall be installed, in addition to meeting the requirements of the Article 5.20.4 of the
Specifications.
5.20.6 The decomposition reactor of cyclohexyl hydrogen peroxide shall be provided with
water-spraying facility.
5.20.7 When the decomposition of cyclohexyl hydrogen peroxide uses octyl chromate as
catalyst, the catalyst preparation room shal l be a dedicated one. The inlet of the chromic acid
shall be equ ipped with a local venti lator and the vent gas shall be washed with water.
5.20.8 The inlet of the catalyst preparation f......
   
 
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