GB 15600-1995 Safety and sanitation regulations for carbon production
Some standard content:
National Standard of the People's Republic of China
Safety and health codes for carbon and graphite production
Safety and health codes for carbon and graphite productionSubject content and scope of application
This standard specifies the basic requirements for safety technology and industrial hygiene in carbon and graphite enterprises. GB 15600-1995
This standard is applicable to the design, construction, acceptance, production, maintenance, overhaul and management of carbon and graphite enterprises. 2 Reference standards
GB4387 Safety regulations for in-plant transportation in industrial enterprises GB5082 Command signals for lifting and hoisting
GB6067 Safety regulations for lifting machinery
GB6222 Safety regulations for gas in industrial enterprises
GB6389 Safety standards for railway crossings in industrial enterprises GB11342 Safety technical assessment standards for motor vehicle drivers in factories and mines GBJ16 Fire protection code for building design
TJ36 Hygiene standards for industrial enterprise design
3 Basic requirements
3.1 The preliminary design of construction projects must have a safety and health section. The safety and health section should analyze and calculate the main occupational hazards in the production process, propose corresponding measures to be taken and achieve the expected results. 3.2 The design of safety and industrial hygiene should be technologically advanced, economically reasonable, safe and reliable. To achieve the unity of production and safety and health, and the unity of economic benefits and social benefits
3.3 The design should give priority to the use of processes and equipment with good safety and health conditions. For large and medium-sized projects, the level of mechanization and automation should be improved, the labor intensity of operators should be reduced, and personal hazards should be minimized. For operations with special dangers and serious dust and toxic hazards, automatic operation or remote control operation should be preferred. Dangerous places that cannot replace manual operation must be equipped with special protection and emergency facilities. 3.4 Safety and health projects must be designed and approved at the same time as the main project. When approving construction projects according to the review authority, safety and health projects should be approved at the same time. The design review of safety and health projects should be participated in by labor safety and health departments. 3.5 Once the design of safety and health projects is approved, it shall not be modified or lowered at will. Otherwise, it shall be submitted to the original approval department for approval. 3.6 Construction must be carried out according to the design. If there is any modification, it shall be approved in writing by the design unit. Concealed projects shall be closed only after being inspected and qualified by the user unit and the construction unit. After the construction is completed, the construction unit shall prepare the completion instructions and completion drawings and deliver them to the user unit for filing. 3.7 After the completion of the construction project, the labor safety and health department shall participate in the inspection and acceptance. If it does not meet the design requirements, it shall not be put into production. Only after passing the acceptance and having complete safety and technical operation procedures can it be put into operation. 3.8 The design of foreign technology projects or foreign equipment supporting projects must comply with the relevant safety and health regulations of my country.
3.9 Places where dangerous substances exist, key parts, railway and road level crossings, and road intersections should all be equipped with eye-catching safety signs.
GB156001995
3.10 The exposed operating parts of the equipment and the parts that endanger personal safety should be equipped with protective covers, protective railings or protective baffles. Pits, ditches, wells, and pools should be equipped with protective fences or covers. If they are moved or moved due to operations, they should be restored immediately afterwards. 3.11 Places where toxic and harmful gases exist should be equipped with danger warning signs and necessary preventive measures should be taken. Places where toxic substances are frequently used must be equipped with first aid facilities. Anti-gas equipment should be stored in a dedicated storage room. 3.12 The production fire hazard classification and fire resistance level of various buildings and structures should comply with the provisions of Table 1. Table 1 Fire hazard and fire resistance grade of buildings and structures in the production process No.
Dangerous goods warehouse
Asphalt melting warehouse
Scorching workshop
Medium crushing batching workshop
Baking workshop
Tinning workshop
Resin impregnation workshop
Asphalt impregnation workshop
Metal impregnation workshop
Name of building and structure
Graphitization workshop (sand coke filler)
Graphitization workshop (carbon black filler)
Resin binder and impregnating agent preparation room
Machining workshop
Hydrogen station
Acetylene station
Oxygen station
Gas generation station||t t||Transformer room
Oil pump room
Substation control room
Distribution room (equipment with oil capacity of 60kg per unit)Distribution room (equipment with oil capacity ≤60kg per unit)Air compressor room
Fuel oil depot
Lubricating oil depot
Dust removal equipment structure
Car garage
Boiler room
Heat medium boiler room
Laboratory
|Fire hazard of production process
Minimum fire resistance level
3The fire extinguishing system, alarm system and type of fire extinguishing equipment must be reasonably designed according to the physical and chemical properties of flammable and explosive substances3.13
GB 15600—1995
(such as non-water fire extinguishing). Fire hydrants should be arranged reasonably and the water volume and water pressure should be guaranteed. 3.14 For factories with fire and explosion hazards, ventilation air shall not be recycled, and ventilation equipment shall have an independent fan room or isolation measures. Necessary equipment and tools shall be made of non-ferrous metals or other measures shall be taken to avoid sparks. 3.15 Asphalt depots, electrostatic precipitators, gas pipelines, gas generating stations and heat medium boiler rooms, etc., shall be equipped with fire and explosion prevention facilities. 3.16 Fire and moisture prevention measures shall be taken around various high-temperature furnaces, and containers containing metal liquids shall be kept dry. 3:17 The design, manufacture and use of hydraulic and hydraulic accumulator tanks and other pressure vessels such as impregnation tanks shall comply with the relevant provisions of the current national "Regulations on Safety Technical Supervision of Pressure Vessels". 3.18 Interns or trainees must receive safety education before they can start internship. Operators must receive safety technology education and operation training, and can only work independently after passing the examination. Personnel engaged in special operations must receive safety technology education and technical training, and obtain an operator's license after passing the examination before they are allowed to work independently. 3.19 Operators should undergo regular occupational hazard physical examinations, and the results should be recorded in the "Employee Health Card". Those who suffer from occupational diseases, occupational contraindications or allergies and meet the transfer regulations should be transferred from their posts in a timely manner. 3.20 Enterprises should establish an operation confirmation system. Important departments such as transformers and distribution stations should establish a strict work ticket system and operation card system. 3.21 Enterprises must conscientiously implement the safety inspection system. For problems found, safety departments at all levels should report to relevant departments (or personnel) to solve them in a timely manner.
3.22 Enterprises should establish a safety production responsibility system for personnel at all levels, and plan, arrange, inspect, summarize and evaluate safety work while planning, arranging, inspecting, summarizing and evaluating production work. 4 Plant area and plant
4.1 Plant site selection
4.1.1 The plant site selection should take the surrounding environment into full consideration, and the production area, living area, water source and "three wastes\ discharge (pile) point" should be selected at the same time. 4.1.2 Carbon plants and electric carbon plants should be built in the suburbs or heavy industrial areas, and located downstream of the local drinking water source. Carbon plants and electric carbon plants built in heavy industrial areas should be located on the upwind side of the lowest frequency wind direction throughout the year. 4.1.3 The site selection should have good engineering geological and hydrogeological conditions, and should avoid faults, landslides, debris flows, silt layers, underground rivers, collapses, karst, expansive soil areas, collapsible loess areas with large amounts of wet collapse, and other unfavorable geological areas, as well as sac fault areas and earthquake areas with a basic intensity greater than 9 degrees, and areas with high and erosive groundwater levels. 4.1.4 The plant site should avoid being located in the following areas: a.
On mineral deposits with mining value;
b. Blasting danger zone and mining subsidence and final displacement zone; c.
Within the protection area of large reservoirs, oil depots, power stations, important bridges, tunnels, transportation hubs, airports, radio stations, television stations, military bases, strategic targets, and sources of drinking water; urban garden areas, sanatoriums, scenic areas, important cultural relics and archaeological areas; d.
Origin of infectious diseases, areas with serious pollution of harmful gases and smoke. 4.1.5 It is strictly forbidden to build in the downstream of reservoirs and tailings dams where safety cannot be ensured. 4.1.6 The elevation of the plant site should be higher than the highest flood level (including wave invasion and high water level) by more than 0.5m. 4.1.7 A certain sanitary protection distance should be set between the edge of the plant and the residential area. Houses for regular residence shall not be set up within the sanitary protection distance, and sanitary protection belts or greening should be set up. 4.2 Factory and workshop layout
4.2.1 The layout of the factory area should be appropriately divided into the main production workshop area, raw material and finished product storage area, auxiliary facilities area, management area, living area, etc., and buildings and structures with the same nature, similar functions, close connections, and similar environmental requirements should be arranged in relatively concentrated areas. 4.2.2 The workshops that produce dust, poison, noise, radioactivity, and the workshops and warehouses that produce and store flammable and explosive dangerous chemicals should be reasonably arranged according to production requirements and factors such as terrain and meteorology. Workshops that produce harmful gases, smoke, fog, dust and other harmful substances with greater hazards should be arranged on the leeward side of the factory area; workshops or sound sources that produce greater noise should be arranged in depressions or at the edge of the factory area; high-temperature workshops should be arranged in well-ventilated 245
areas.
GB15600-1995
4.2.3 The layout of the factory area and the process layout of the main workshops should be equipped with safe passages for personnel, fire trucks and ambulances to use in abnormal situations or emergency rescue situations.
4.2.4 The main windward side of the workshops for burning, asphalt melting, roasting, impregnation and graphitization should be at an angle of 45° to the maximum frequency wind direction. 4.2.5 The layout of the workshop production equipment should allow operators to have sufficient working space, and the object handling route should be as short as possible, so that the production line does not cross, and the storage and transportation methods are reasonable.
4.2.6 The configuration of the bridge crane in the workshop warehouse should be convenient for operation and maintenance, and there should be enough safety areas and passages to avoid injuries. 4.2.7 The raw material warehouse should be arranged along the transportation route and located at the edge and leeward side of the factory area. A certain area should be reserved outside the warehouse for spare storage. 4.2.8 The graphitization workshop should be arranged in a relatively open, well-ventilated area that avoids western exposure and on the leeward side of the dominant wind direction. The distribution room and rest room should be located on the upwind side of the workshop. The graphitization busbar trench should be closed. The graphitization workshop that produces high-purity products should also have a proper purification and recycling area.
4.3 Factory Buildings
4.3.1 When using old buildings, the original buildings should be inspected and identified, and can only be used after confirming that they meet the safety and health requirements. If they do not meet the requirements, corresponding measures should be taken.
4.3.2 The factory buildings of sintering, kneading, molding, roasting, graphitization and other workshops should be equipped with windproof skylights to maximize the use of natural ventilation. When natural ventilation cannot meet the requirements, mechanical ventilation should be installed. 4.3.3 The height of the factory buildings of sintering, kneading, molding, roasting, graphitization and other workshops should be appropriately increased. For newly built, renovated and expanded graphitization plants, the rail surface elevation of the bridge crane should not be less than 10m. 5 Carbon Process
5.1 Raw Materials
5.1.1 Raw material warehouses and material yards should be centrally set up and equipped with fire prevention facilities, and storage and use should be integrated as much as possible. 5.1.2 Coal yards should generally be located in the open air, and the site should have drainage facilities. It is prohibited to lay cables, heating pipes, and flammable and combustible liquid pipes under the coal yard. Indoor coal storage should have good ventilation, and the distance between the coal pile and the ceiling should not be less than 1.9m, and the distance from the combustible wall should not be less than 1.5m. 5.1.3 Measures should be taken to prevent asphalt from sticking when storing asphalt. Medium-temperature asphalt should be stored in the warehouse and must not be piled in the open air. 5.1.4 The melting asphalt should be heated by steam or thermal oil, and flue gas heating is not allowed. Asphalt melting should be closed, and asphalt melting tanks, dryers and crushers must be equipped with ventilation and dust removal facilities, and flue gas should be purified. 5.2 Burning
5.2.1 Tank-type lamp burning furnaces should adopt closed charging and discharging as much as possible, and ensure good ventilation. Charging and discharging should be operated in the control room. 5.2.2 The width of the outermost side of the tank-type burning furnace from the innermost side of the factory building should not be less than 3m; the working platform should be paved with non-slip and non-flammable materials, and should not be fixedly connected to the furnace body and the factory building wall. 5.2.3 The tank-type furnace should maintain negative pressure operation. When positive pressure appears, the charging should be stopped immediately, and it is strictly forbidden to open the fire mouth. 5.2.4 When dealing with coking and shed materials in the tank-type furnace, protective glasses and protective clothing must be worn. The fire mouth must not be opened and the fire mouth must not be faced directly. It is strictly forbidden to add materials when the material is crowded.
5.2.5 The exhaust fan of the rotary kiln should be equipped with a temperature alarm device. Accident water storage tanks should be set up separately at the kiln head and kiln tail. Measures should be taken to prevent heat radiation from the kiln body.
5.2.6 When dealing with the blockage of the rotary kiln charging port, you must stand on the side and it is strictly forbidden to face the fire mouth. When the rotary kiln discharge port is blocked, the gas must be stopped, and a certain negative pressure should be maintained at the kiln head and removed in time. 5.2.7
5.2.8 The following regulations should be observed when entering the kiln for work: a.
The power supply must be cut off;
A maintenance sign should be hung on the switchboard;
A dedicated person should be on guard outside the kiln;
Wait for the temperature in the kiln to drop below 60℃.
5.3 Medium crushing and grinding
GB15600--1995
5.3.1 Raw products should be crushed by mechanical equipment and should not be beaten manually. 5.3.2 Medium crushing and batching should be automatic continuous batching or intermittent closed batching. 5.3.3 The batching department should use high-rise buildings and closed three-dimensional transportation. When the bucket elevator is in operation, the observation hole should be closed tightly, and it is forbidden to probe or reach into the observation hole of the bucket elevator.
5.3.4 If the following situations occur during the batching process, the machine should be stopped for processing: equipment has serious defects;
b. The airtightness is not good, and the dust leakage is serious;
The lighting at the work place is insufficient.
5.3.5 Crushing and grinding equipment should take measures such as silencing and sound insulation. 5.4 Kneading
5.4.1 The kneading plant must be equipped with a smoke exhaust system and good ventilation facilities. 5.4.2 The asphalt discharge port and dry material discharge port of the kneading pot should be sealed, and the paste outlet must be equipped with an exhaust hood. 5.4.3 If the intermittent kneading machine discharges materials in a pit, it must be equipped with a conveying device and the pit should be well ventilated. 5.4.4 When the kneading pot is working, it is strictly forbidden to put hands or tools into the pot to take samples. The machine must be stopped before temperature measurement, and the temperature measurement can only be carried out after the stirring blade stops running. 5.4.5 A guardrail should be installed at the rear of the tilting kneading pot. The exhaust fan should be turned on before unloading. The flip angle should not be greater than 90° when unloading. The auger can only be started after the pot is turned in place. A fence should be installed 1m around the continuous kneading machine. 5.4.6 A bottom-open kneading pot should be used instead of a tilting kneading pot. 5.5 Molding
5.5.1 Anti-vibration measures should be taken for the foundation of the vibration molding machine. The vibration table and the operating table of the vibration molding machine must be separated, and it is strictly forbidden to contact the two. A fence should be installed 1m outside, and the vibrator should be sealed and silenced. When the vibration table vibrates, personnel are not allowed to operate on the vibration table; when cleaning the adhesive material on the heavy hammer, people should be more than 0.5m away from the hammer.
5.5.2 Simple cooling machines should be used as much as possible for cooling materials. The cooling platform should be equipped with protective railings and mechanical smoke exhaust devices. No one should be pushed on the protective railings of the cooling platform.
5.5.3 A safety baffle should be installed in front of the hydraulic press extrusion port. Lubrication is prohibited during the operation of the hydraulic press, and it is prohibited to remove materials when the baffle and scissors are in operation. It is prohibited to repair the hydraulic press or dismantle the valve when the pipeline is under pressure. 5.5.4 The chain roller conveyor for carbon blocks must be equipped with a guide fence to prevent the carbon blocks from running off. It is strictly prohibited to lift carbon blocks, electrodes, etc. during the operation of the roller. 5.5.5 When pressing with a vertical hydraulic press and an eccentric press, a dedicated person should be responsible for the operation. It is strictly prohibited to put your hands into the mold. 5.6 Roasting
5.6.1 The roasted products should be cleaned mechanically. 5.6.2 The distance between the outermost side of the roasting furnace body and the innermost side of the wall should not be less than 1m. It is strictly prohibited to stack products on the ring roasting furnace and on the pipes on both sides.
5.6.3 The roasting furnace should comply with the following regulations during operation: When replacing the exhaust fan or moving the transfer pipe during the roasting process, the gas heating should be suspended or the gas consumption should be reduced; a.
When moving the burning rack, the gas must be blown and released; b.
The tar in the flue should be treated once a year; d.
It is strictly forbidden to clean the product on the roasting furnace.
5.6.4 When the roasting furnace is temporarily powered off for some reason, the workshop should be contacted in advance, the exhaust fan and electrostatic precipitator should be stopped, and the bypass flue should be opened. 5.6.5 When entering the furnace room for work, there must be a special person to monitor the furnace mouth. It is strictly forbidden to carry out hoisting operations above the furnace room where people are working. 5.6.6 Operators should use ladders to enter and exit the furnace, and it is strictly forbidden to go up and down with the hook. 5.6.7 For continuous electric furnaces that use hydrogen or decomposed ammonia as protective atmosphere, protective gas should be passed before power is turned on, and maintenance should be carried out for a period of time. After the flame at the discharge pipe is ignited, power can be turned on again.
5.7 Impregnation
GB15600-1995
5.7.1 Newly built, renovated and expanded impregnation workshops should be set up independently. 5.7.2 The equipment of the impregnation system should be closed and equipped with local smoke exhaust facilities. 5.7.3 The pressurization of the impregnation tank should comply with the following regulations: a.
Air pressure shall not exceed 0.68MPa (7kg/cm2); nitrogen pressure shall not exceed 1.176MPa (12kg/cm2); h.
Impregnation pressure shall not exceed the pressure specified in the design. c.
5.7.4 When using a press to impregnate molten metal, insulation measures should be taken for the press base and bell. When inert gas is used for pressurization, the operator should be more than 6m away from the press.
5.7.5 When vacuuming or pressurizing, it should be increased gradually. After pressurization or vacuum, it is not allowed to hit the pipeline and cut the pressure container. The gauge pressure must be reduced to zero before discharging.
5.7.6 Cooling corridors and ventilation facilities should be set for hot tanks. 5.7.7 When loading and unloading products, the crane wire rope must be vertical to the lifting object and must not be pulled diagonally. No one should stay or walk under the heavy object. 5.7.8 It is strictly forbidden to let water flow into the asphalt storage tank to prevent asphalt from running out and injuring people. When opening the drain valve and opening the impregnation tank, it should be confirmed that there is no pressure in the tank. When opening the horizontal impregnation tank, people should stand on the side of the tank cover to prevent the cover door from flying out and injuring people. 5.7.9 Before cooling the impregnation tank with water, the asphalt pipe, vacuum pipe, compressed air pipe and heating valve should be closed. 5.7.10 When working in an asphalt storage tank or impregnation tank, the internal temperature shall not be higher than 35°C, and the tank mouth must be supervised by a person. 5.8 Graphitization
5.8.1 The graphitization furnace shall meet the following requirements: There shall be no water leakage in the furnace foundation, and the carbon black filler shall not be damp; a.
The laying of materials and the loading and unloading of products shall be mechanically operated; h.
The furnace body of the serial graphitization furnace shall be covered, and the filler shall be mechanically transported; c.
d. The graphitization furnace for producing high-purity graphite products must be covered, and the flue gas shall be treated to meet the standards before it can be discharged. 5.8.2 The transfer system of the mobile graphitization furnace must be operated and directed by a dedicated person. It is strictly forbidden to pull the furnace car when the transfer car track and the ground track are not aligned. It is strictly forbidden to start the transfer vehicle when the traction rod is not in place, the furnace car has not been completely transported to the transfer vehicle, and the furnace car has not been completely separated from the transfer vehicle. 5.8.3 When the transfer vehicle is transporting the furnace, it is forbidden to carry people on the furnace car, and the passage should be checked and obstacles should be removed. Pay attention to the fire inspection of the high-temperature furnace and run it smoothly. 5.8.4 The insulation material, resistance material and return material of the graphitization furnace should have a fixed stacking site. 5.8.5 The products after graphitization should be cleaned mechanically. 5.8.6 It is strictly forbidden to use a crane to hang heavy objects to hit the insulation material hard shell of the graphitized product. 5.9 Carbon product processing
5.9.1 The exposed transmission parts of mechanical equipment should be equipped with protective devices and shall not be dismantled at will. 5.9.2 The processing workshop should have good dust extraction and negative pressure cleaning facilities, and anti-slip measures must be taken on the factory floor. 5.9.3 There should be corresponding transport rollers between the machine tools for processing electrode products, and a small cantilever crane should be equipped next to each machine tool. 5.9.4 Carbon block processing should have good lifting and fixing tools and anti-slip facilities. 5.10 Carbon product stacking
Raw materials, finished products, semi-finished products and waste materials should be stacked neatly and firmly, and should not hinder traffic and loading and unloading. 5.10.1
The stacking height of extruded blocks shall not exceed 2m. 5.10.2
The stacking of carbon products shall comply with the following regulations: a.
6 layers.
The stack of electrodes with a diameter of 350mm or more shall not exceed 3.0m; the stack of electrodes with a diameter of less than 300mm shall not exceed 2.5m; electrodes with a diameter of 9150mm or less must be stacked on a special platform; the stack of chemical anodes shall not exceed 1.2m;
Carbon blocks (bottom blocks, blast furnace blocks) and side blocks shall be stacked in a crisscross pattern, with a maximum of 8 layers, and those with a length of less than 600mm shall not exceed GB 15600—1995
5.10.4 The expansion and contraction of both ends of the stacked products shall be kept within 100mm, and the products in the stack shall not be suspended. 5.10.5 For the stacking of roasted and graphitized products, the parallel distance between the stacks shall not be less than 0.5~~1.0m; the distance between the stack and the wall shall not be less than 0.7~~1.0m.
6 Industrial Hygiene
6.1 Dust and Poison PreventionbZxz.net
6.1.1 All process equipment that produces toxic gases, aerosols and dust shall be sealed and equipped with exhaust devices to maintain negative pressure. Dust and toxic escape ports that cannot be sealed shall be equipped with suction hoods.
6.1.2 The maximum allowable concentration of harmful substances in the air of production workshops and workplaces shall comply with the provisions of Table 2. Table 2 Maximum allowable concentration of harmful substances in the air of workplaces Substance Name
Asphalt fume
Asphalt volatiles (benzene solubles in granular polycyclic aromatic hydrocarbons) Carbon monoxide
Sulfur dioxide
Hydrogen cyanide
Carbon dust (containing less than 10% free silicon dioxide) Carbon black dust
Graphite dust (containing less than 10% free silicon dioxide) Containing 10% to 50% free silicon dioxide Dust
Containing 50%~~80% free silicon dioxide Dust
Containing more than 80% free silicon dioxide Dust
Copper dust (calculated as copper)
Maximum allowable concentration
6.1.3 In workshops where a large amount of toxic gas, dust or explosive gas may suddenly be produced during the production process, a dangerous gas or dust monitoring device should be installed, an automatic alarm device should be installed when necessary, and an emergency exhaust device should be installed. 6.1.4 For workshops with high toxicity and accumulation of smoke and dust, the surface of the internal structure should be smooth, not easy to accumulate dust, and easy to clean. Materials that do not absorb poisons should be used, and a protective layer should be added when necessary for cleaning. Cleaning should be equipped with a dust suction device to avoid secondary dust. 6.1.5 When carrying toxic substances, eating and smoking are strictly prohibited, and protective equipment should be worn. 6.1.6 It is strictly prohibited to mix toxic substances with inorganic oxidants, strong acids, etc. 6.1.7 The following measures should be taken in workplaces where organic acids, resins and other hazardous substances are used or harmful gases such as hydrogen cyanide are produced: a.
Sealed production equipment;
Set up ventilation, purification and recovery devices;
Remote operation or remote control.
6.1.8 The high-purity graphitization process should be sealed to prevent leakage of chlorine and fluorine. Workplaces that produce highly toxic substances such as cyanide should be equipped with monitoring, display and alarm devices.
GB15600—1995
6.1.9 In dangerous places where toxic and harmful gases are produced, there must be more than two workers and a dedicated person to supervise. 6.2 Prevention of asphalt hazards
6.2.1 Workers who load, unload, transport and use asphalt and asphalt-containing products should wear full protective equipment, apply protective ointment to exposed skin, face and neck, and take a shower after work. 6.2.2 Sites where asphalt work is often carried out must be equipped with sufficient warm water showers, and the water quality should meet the hygiene requirements. Sites where asphalt work is occasionally carried out can be equipped with simple bathing utensils. 6.2.3 Units that load, unload, carry and use asphalt should explain the precautions for asphalt work to workers before each work begins, and check the wearing of protective equipment at any time. Work should be carried out under the guidance of a dedicated person. 6.2.4 The loading, unloading and handling of asphalt should be carried out at night or without sunlight. Barreled asphalt can generally be loaded, unloaded and carried during the day, but it should not be carried out during the hot noon. 6.2.5 When using asphalt, the following regulations should be observed: a. The asphalt operation position must be located on the upwind side; a production process in which people and asphalt do not come into direct contact should be adopted; b.
The asphalt processing process should be closed;
d. Ventilation or purification facilities should be installed in the workplace where asphalt dust and smoke are generated. 6.2.6 The high-temperature asphalt smoke from the roasting furnace must be equipped with a purification and recovery device, and the recovered tar should be properly handled. In the workplaces where asphalt fume is emitted, such as melting, kneading, cooling, impregnation, roasting, molding, graphitization, etc., natural ventilation, mechanical ventilation and local exhaust should be adopted, and the asphalt fume should be purified as much as possible.
6.2.7 Patients with skin diseases, conjunctival diseases, and those who are allergic to asphalt are not allowed to engage in asphalt work. 6.3 Preventing lead poisoning
6.3.1 In the transportation, transfer and production process of lead materials with flying dust and toxicity, closed exhaust and purification measures should be taken. 6.3.2 Dust-absorbing cleaning devices should be installed in the lead workplace to regularly clean the equipment, floor, side walls and roof. 6.3.3 The labor protection equipment of lead workers must be washed in the factory, and they are not allowed to be taken out of the factory, and they are not allowed to wear work clothes into the canteen. 6.3.4 The factory should have a hot water bathroom and two sets of suitcases to store labor protection equipment and personal clothing respectively. 6.3.5 Before drinking water or eating, you should rinse your mouth, wash your face and hands. Smoking and eating in the workplace are not allowed. 6.4 Noise and vibration control
6.4.1 The noise level in production workshops and workplaces shall not exceed 85dB(A). If existing enterprises cannot meet the standard temporarily, the standard may be relaxed appropriately, but it shall not exceed 90dB(A).
6.4.2 For production workshops and workplaces of existing enterprises where the noise level exceeds 90dB(A), sound absorption, sound insulation, and noise reduction measures shall be adopted according to the radiation energy and frequency characteristics of the noise source, and the standards shall be met within a time limit. 6.4.3 For positions where the noise level still exceeds 90dB(A) after protective measures are taken, measures such as setting up soundproof operation rooms, requiring operators to wear hearing protection equipment, and reducing noise exposure time shall be adopted. 6.4.4 Low-noise equipment should be selected in the design.
6.4.5 For equipment or tools that generate strong vibration, the following measures should be taken: a. The equipment should be installed on a separate soundproof and vibration-proof foundation; b. The operating position should be isolated from the vibration source;
c. The equipment or tool should be equipped with a vibration reduction device.
6.5 Heating and cooling
6.5.1 High-temperature workshops such as graphitization and roasting should make full use of natural ventilation. If natural ventilation does not meet the requirements, mechanical ventilation should be adopted. If the operating position does not meet the requirements, local air supply should be adopted. 6.5.2 High-temperature workshops should have a dedicated rest room, and air conditioning should be installed indoors in summer or other effective cooling measures should be taken. 6.5.3 In areas without centralized heating, local heating devices can be installed at work and rest areas. 250
7 Auxiliary facilities
7.1 Oil depot
GB15600—1995
7.1.1 The oil depot should be far away from workshops and warehouses with fire hazards, and should be arranged in the lower terrain of the factory area. Flammable oils in barrels and bottles should not be stored in the open air.
7.1.2 There should be an open safe area around the oil depot, and a fireproof fence with a height of at least 1m and a thickness of 0.5m should be set up. The fireproof distance from the open flame shall not be less than 10m.
7.1.3 There should be enough space near the oil depot to store empty oil drums. The stacking of oil drums shall not exceed three layers. 7.1.4 The oil depot should be equipped with lightning protection devices, and overhead lines of any voltage level are prohibited from crossing, and measures should be taken to eliminate static electricity accumulation. 7.1.5 The maximum safe height of oil storage in each oil tank in the oil depot must be clearly specified. 7.1.6 The safe capacity of oil barrels should be determined according to the seasonal climate, and generally 5% to 7% of the gas space should be maintained. 7.1.7 The barreled oil depot should be a ground building, and underground or semi-underground buildings should not be used. 7.1.8 The oil depot room should have good natural ventilation, and the ventilation holes should have fire-proof devices to prevent sparks from entering. 7.1.9 The ground inside the oil depot should not leak oil and will not cause fire due to collision. There should be a 1% slope towards the oil collection ditch or oil collection well outside the depot. Indoor lighting must be explosion-proof.
7.1.10 The barreled depot for storing lubricating oil products must have at least two doors. The barreled oil products stored in the depot should be upright. The oil barrels with a flash point below 28°C shall not exceed 2 layers; the oil barrels with a flash point between 28~45C7. 1. 11
shall not exceed 3 layers; the oil barrels with a flash point above 45°C shall not exceed 4 layers. 7.1.12 It is forbidden to wear synthetic clothing, shoes with nails, or clothing that is easy to catch fire due to friction in the gasoline depot. 7.1.13 Copper tools must be used when opening and closing the oil drum cover. It is strictly forbidden to discharge residual oil into the ditch and sewer. 7.1.14 The oil pump room must be well ventilated. The start and stop of the oil pump should be strictly operated. Explosion-proof lighting should be installed indoors, and switches and fuses should be isolated from the pump room.
7.2 Dangerous Goods Depot
7.2.1 Strict management must be implemented for flammable, explosive, and chemical dangerous goods and facilities with fire and explosion hazards, and effective safety measures must be taken.
Explosive dangerous goods should not be stored in the basement or semi-basement of the building. The number of safety exits in the explosive dangerous goods depot should not be less than two. The depot door should open outwards. 7.2.4
Chemical hazardous goods warehouses shall comply with the following provisions: a.
Storage eaves height shall not be less than 3.5m, and the roof shall be double-layer ventilated; sunshades shall be installed on the exterior of doors and windows of the warehouse, and door lobbies shall be added; b.
Storage shall use high windows, the lower part of the windows shall not be less than 2m from the ground, and protective fences and frosted glass or tinted glass shall be installed on the windows. Warehouses storing oxidants, flammable liquids and solids, and highly toxic substances shall use non-combustible floors that are easy to wash. 7.2.6 Inflammable and explosive hazardous goods warehouses, explosion-proof electrical lighting equipment and lightning protection devices must be installed. The storage location of highly toxic substances should be away from open flames, heat sources, oxidants, acids, food products, food additives, etc., and generally shall not be stored together with other 7.2.7
kinds of items. The warehouse should have good ventilation. 7.2.8 For small amounts of highly toxic substances used by scientific research, laboratory and other departments, special counters should be set up for storage, and special personnel should be responsible for storage and supervision. 7.2.9 For the transportation of highly toxic substances, special personnel should be assigned to escort when necessary. Vehicles and ships that have transported highly toxic substances must be thoroughly cleaned and processed. Otherwise, other items are not allowed to be transported. When loading and unloading highly toxic substances, they must not be carried, backed, dropped, bumped or rolled. 7.2.10 Chemically hazardous substances must be stored in special warehouses. Special warehouses should be equipped with corresponding safety facilities such as ventilation, explosion prevention, pressure relief, fire prevention, lightning protection, sun protection, humidity adjustment, static electricity elimination, alarm, fire extinguishing, and protective dikes according to the types and properties of the stored items, and measures such as heat insulation, cooling and light avoidance should be taken.
7.2.11 Chemical hazardous substances should be stored by category and item, and there should be a certain safety distance between stacks. Chemical hazardous substances with conflicting chemical properties or protection and fire extinguishing methods shall not be stored in the same warehouse or storage room. 251
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7.2.12 When storing dangerous chemicals that are prone to burn, explode or produce toxic gases under sunlight, and flammable liquids and gases in barrels or cans, there should be sun protection and ventilation facilities.
7.2.13 Warehouses for storing strong acids should be single-story buildings and should not be located underground. The warehouse should have good ventilation and the floor should be acid-resistant. If different types of acids are stored in the same warehouse, they should be separated by protective walls. The floor of the acid warehouse should be paved with acid-resistant and fire-resistant materials. Materials that absorb and neutralize acids should be stored in the warehouse. 7.2.14 Storage tanks for dangerous chemicals should be located in independent areas and should have safety devices such as detection and alarm. Storage tanks of the same type should be interchangeable and empty tanks should be reserved.
7.2.15The materials of equipment and pipelines for transporting hazardous chemicals must meet the requirements of the chemical and physical properties of the transported substances. According to the specific circumstances, measures such as leakage prevention, corrosion prevention, anti-static and pressure resistance should be taken. When the pipeline for transporting corrosive liquids is parallel to other pipelines, the corrosive liquid pipeline shall not be placed above other pipelines.
7.2.16 In large warehouses, storage tanks and important pipeline areas for hazardous chemicals, there should be safety signs and painted with safety colors. 7.2.17 Bottled low-concentration sulfuric acid and hydrochloric acid should be stored in warehouses with heating equipment in winter. 7.3 Boiler room
7.3.1 The installation and construction of the boiler must be undertaken by the unit approved by the boiler and pressure vessel supervision department, and construction can only be carried out after obtaining the installation license. The installation and construction unit shall inspect the quality of the components. If any problem that cannot guarantee the installation quality is found, it has the right to refuse installation and report to the relevant departments.
7.3.2 Boilers should generally be installed in a separately built boiler room. Boiler rooms should not be connected to residential buildings and production plants. If they must be connected to production plants, they should be separated by protective walls.
7.3.3 Boiler rooms should meet the following requirements:
The equipment layout in the boiler room should be convenient for operation, passage and maintenance; a.
The operation location and water level gauges, pressure gauges, thermometers, etc. should have sufficient lighting, and there should also be spare lighting equipment or tools; b.
There should be good ventilation and necessary cooling and anti-freezing measures; c.
The ground should be flat without steps and water accumulation;
The load-bearing beams, columns and other components of the boiler room should be at a certain distance from the boiler or other high temperature protection measures should be taken; e.
f. Each floor of the boiler room should have at least two exits, which are located on both sides. The doors leading to the outside should open outwards and should not be locked or closed during the operation of the boiler.
7.3.4 The boiler's safety accessories such as safety valves, pressure gauges, water level gauges, high and low water level alarms, air supply and exhaust interlock devices, flame monitors, emergency shut-off valves, explosion-proof doors, sewage discharge devices, and instruments for measuring temperature, pressure, and flow must be complete and reliable. 7.3.5 Various high-temperature pipelines in the boiler room must be equipped with insulation layers. 7.3.6 Units using boilers should establish various rules and regulations based on the post responsibility system. The boiler water intake, ignition, pressure increase, operation, and shutdown should be strictly carried out in accordance with the regulations. All boilers must be registered with the local boiler and pressure vessel safety supervision department and obtain a use permit before they can be put into operation.
7.3.7 During boiler operation, if any of the following situations occur, the boiler should be stopped immediately: a.
Serious water shortage;
Serious water overflow;
The safety valve has been activated during overpressure, and the pressure continues to rise after measures are taken; All water supply machinery fails and water can no longer be supplied to the boiler; d.
The water level gauge, pressure gauge and safety valve are all ineffective; f. The boiler components are damaged, endangering the safety of the operating personnel g. The combustion equipment is damaged, the furnace wall collapses or the boiler frame is burned red, etc., which seriously threatens the safe operation of the boiler. The water softening device should be repaired in time if it is damaged, otherwise the water supply will be suspended; h. Other abnormal operating conditions, and exceeding the allowable range of safe operation. 7.3.8. A regular maintenance system should be established for boilers. If the pressure components of the boiler are damaged and cannot guarantee safe operation, they should be repaired in time. It is strictly forbidden to repair pressure components when the boiler is under pressure or the water temperature is high. 7.3.9 The boiler must be inspected regularly and shut down for internal and external inspections once a year. 7.3.10 The heat medium boiler must be installed in an independent factory building and should be equipped with a steam fire extinguishing tap. 7.3.11 When the heat medium boiler is ignited or extinguished, the boiler induced draft fan must be operated in advance or lag for a period of time. 7.3.12 Before the heat medium main circulation pump works, it is not allowed to heat up sharply. The pump can only be stopped when the boiler is turned off and cooled. 7.3.13 The residue in the heat medium expansion tank should be removed regularly. When cleaning, the operator should wear protective equipment. 7.4 Gas generating station
7.4.1 Gas generators should be equipped with air and gas pressure gauges and flow meters, gas outlet thermometers, high and low pressure alarms, light signals and other devices.
7.4.2 It is strictly forbidden to use volatile liquid fuels such as gasoline and kerosene for ignition of gas generators. A check valve (dry or wet) must be installed on the air branch pipe of the gas generator, and a gate valve that is easy to operate should be installed in front of the check valve. A vent pipe should be installed at the end of the air branch pipe, and the vent pipe should be connected to the outdoors. An explosion-proof valve should be installed at the end of the main gas pipeline. 7.4.3 Gas generators and related equipment must be tested for overall air tightness after new installation or overhaul. 7.4.4 Manholes and ladders, platforms and railings for up and down passage must be provided above and below the scrubber and droplet separator. A gate valve and vent pipe that can cut off the hand system separately should be installed at the outlet of the scrubber. 7.4.5 Before ignition, the gas quality in the pipeline must be qualified. It is necessary to check whether the equipment, pipeline valves, burners, instruments, gas pressure, etc. are normal, and remove the condensed water in the system. 7.4.6 The following regulations must be observed when igniting gas: a. When igniting gas on the same pipeline, the end point should be ignited first, and then the gas should be reversed in sequence; b. When the furnace is ignited, there should be a certain negative pressure in the furnace. If the gas does not ignite when it is delivered, or the gas is ignited and then extinguished, the cause should be immediately found out, the mixed gas in the furnace should be exhausted, and then ignition should be carried out again; c. Flashback, flameout, flameout and other phenomena are not allowed to occur during operation. Otherwise, they should be eliminated in time. If they cannot be eliminated, the furnace should be stopped immediately. 7.4.7 When working with gas (such as with gas extraction and plugging blind plates) and taking gas pipes, warning signs should be hung in conspicuous places, and gas protection or medical personnel should be present. Operators should wear gas masks and take reliable safety measures. 7.4.8 The following provisions shall be observed when stopping gas for maintenance: a. Use blind plates to cut off the gas source;
For temporary maintenance outside the system, water seals can be used to cut off the gas, but a special person must be assigned to supervise; if it is necessary to start a fire, combustibles should be removed first, fire extinguishing equipment should be prepared, and steam or nitrogen should be used for purging. The operation can only be carried out after the carbon monoxide concentration is lower than c.
30mg/m3 or the biological test is clear. 7.4.9 In the event of gas poisoning, fire, explosion, or large-scale gas leakage, the accident site should be quickly clarified and effective measures should be taken to prevent risky rescue and expansion of the accident. Immediately report to the dispatch room and gas protection station. If a gas fire accident occurs, the fire alarm should be immediately called, and if a gas poisoning accident occurs, the nearby health center should be notified immediately. 7.4.10 Dangerous areas should be marked out at the accident site, and sentries should be arranged to prevent non-rescue personnel from entering. Rescue personnel entering the gas danger zone must wear oxygen respirators. It is strictly forbidden to use gauze masks or other equipment that is not suitable for preventing gas poisoning. 7.4.11 The gas supply to the gas facility shall not be restored without finding out the cause of the accident and taking necessary safety measures. 7.4.12 When a gas facility catches fire, the gas pressure should be gradually reduced and steam or nitrogen should be introduced, but the minimum gas pressure in the facility shall not be less than 100Pa. It is strictly forbidden to suddenly close the gas valve or seal the water seal to prevent backfire and explosion. 7.5 Air compressor station and acetylene station
7.5.1 The air compressor station should be away from places that emit explosive, corrosive and toxic gases and dust and other harmful substances, and be located on the leeward side of the minimum frequency wind direction of the above-mentioned places throughout the year.
7.5.2 The net distance between the vertical gas storage tank and the outer wall of the machine room in the air compressor station should not be less than half the height of the gas storage tank. 7.5.3 Acetylene stations are strictly prohibited from being set up in areas that are easily flooded, and should not be set up in crowded areas and main traffic arteries, and should have good natural ventilation.
GB15600-—1995
7.5.4 Acetylene stations should be set up with separate walls or fences. No unauthorized personnel are allowed to enter. Open flames should not be used within 30 meters around. The net distance between the wall or fence and the building with explosion hazard, the edge of the slag pit and the outer wall of outdoor acetylene equipment in the acetylene station should not be less than 3.5 meters for solid walls and 5 meters for hollow walls (or fences).
7.5.5 Calcium carbide warehouses should be built separately and should not be set up in low-lying waterlogged areas. The ground should be higher than the surrounding ground by more than 0.5 meters. The warehouse should be well ventilated, and it is prohibited to lay water pipes and steam pipes. It is strictly prohibited to store calcium carbide in the basement. 7.5.6 Fireworks are strictly prohibited in acetylene generating stations and calcium carbide warehouses. Firefighting equipment such as carbon dioxide fire extinguishers and dry sand must be available. Tools that easily generate sparks must not be used.
7.6 Gas Cylinders
7.6.1 Oxygen cylinders, hydrogen cylinders, acetylene cylinders, etc. must not be exposed to the sun, must not be placed near furnaces, roasting furnaces, graphitization furnaces, gas generators, boilers and various kilns, must not be placed near heaters and stoves, and must not be less than 10m away from open flames. 7.6.2 Oxygen cylinders are strictly prohibited from contacting with oil. Hydrogen cylinders and liquid chlorine cylinders, hydrogen cylinders and oxygen cylinders, liquid fluorine cylinders and liquid ammonia cylinders, etc. must not be mixed in the same warehouse.
7.6.3 The storage, transportation and use of acetylene cylinders shall comply with the following regulations: The ambient temperature shall not exceed 40°C in general, otherwise, cooling measures shall be taken; a.
The storage quantity at the use site shall not exceed 5 cylinders; c.
Acetylene cylinders shall be properly fixed during transportation. When transported by car, the height of the car shall not be less than two-thirds of the height of the cylinder; Sunshade facilities shall be provided for transportation in summer, and daytime transportation is not suitable in hot areas; Fireworks are strictly prohibited on the vehicle, and dry powder or dioxide should be available. Carbon fire extinguisher, it is strictly forbidden to use carbon tetrachloride fire extinguisher; f.
It is strictly forbidden to transport with oxygen cylinders, chlorine cylinders and flammable items, and store them in the same room; g.
It is forbidden to knock or collide with acetylene cylinders, and it is strictly forbidden to place them in poorly ventilated, radioactive places or on insulators such as rubber; when lifting and transporting, special clamps and vibration-proof transport vehicles should be used, and it is strictly forbidden to use electromagnetic cranes and chain ropes for lifting and transportation. h.
7.6.4 Liquid chlorine cylinders must be placed in a single layer in the cylinder warehouse. It is strictly forbidden to stack liquid chlorine cylinders in places where the sun is directly shining or the ground is wet, or where corrosive substances exist, and they should be stored in separate rooms from other toxic gas cylinders. 7.6.5 When using liquid chlorine cylinders, a pressure buffer and a backflow prevention device must be set between the cylinder and the equipment used, the room should be well ventilated, and preventive measures should be taken to prevent chlorine leakage accidents. 7.6.6 When unloading liquid chlorine cylinders, it is strictly forbidden to directly heat the cylinder body with fire, boiling water, or steam. 7.6.7. Liquid nitrogen bottle warehouses should be cool and shady, without heat sources, open flames, exposure to the sun, and long-term rain. 7.6.8 Liquid ammonia bottles and liquid chlorine bottles should not be stored in the same room, let alone used at the same time in the same place. 8 Electrical facilities
8.1 Substation
8.1.1 Substations should be away from buildings and structures that generate strong vibrations and noise, and should be independent areas, and should be kept at a certain distance from buildings and structures that emit dust and corrosive gases.
8.1.2 Substations are prohibited from being located in low-lying places with accumulated water or polluted by smoke and dust. Buildings should be solid and should be built with non-combustible materials. The doors of substations should open outwards. It is not allowed to pile up sundries indoors, and it is not allowed to pile up flammable and explosive items around. The passages must ensure that fire trucks are unobstructed. 8.1.3 Substations should have measures to prevent fire, leaks, lightning, moisture, and prevent small animals from entering live parts. 8.1.4 Outdoor substations should be equipped with a wall or solid fence with a height of not less than 2m. 8.1.5 Transformers in workshop substations shall not be located in Class A or Class B production plants, and transformers and distribution equipment shall not be located in workshops with strong vibration, extreme humidity, dust, explosion hazard, or corrosive gas. 8.1.6 Substations must establish and improve the following systems: a.
Safety production responsibility system;
Shift system;
People-in-charge system;13 The residue in the heat medium expansion tank should be removed regularly. When cleaning, the operator should wear protective equipment. 7.4 Gas generating station
7.4.1 The gas generator should be equipped with air and gas pressure gauges and flow meters, gas outlet thermometers, high and low pressure alarms, light signals and other devices.
7.4.2 It is strictly forbidden to use volatile liquid fuels such as gasoline and kerosene for ignition of the gas generator. A check valve (dry or wet) must be installed on the air branch pipe of the gas generator, and a gate valve that is easy to operate should be installed in front of the check valve. A vent pipe should be installed at the end of the air branch pipe, and the vent pipe should be connected to the outdoors. An explosion-proof valve should be installed at the end of the gas main pipeline. 7.4.3 The gas generator and related equipment must be tested for overall air tightness after new installation or overhaul. 7.4.4 There must be manholes and ladders, platforms and railings for up and down traffic above and below the scrubber and droplet separator. At the outlet of the washing tower, a gate valve and a vent pipe for the handy system to cut off separately should be installed. 7.4.5 Before ignition, the gas quality in the pipeline must be qualified. It is necessary to check whether the equipment, pipeline valves, burners, instruments, gas pressure, etc. are normal, and remove the condensed water in the system. 7.4.6 The ignition of gas must comply with the following regulations: a. When the gas is divided on the same pipeline, the end use point should be ignited first, and then the gas should be reversed in sequence; b. When the furnace is ignited, there should be a certain negative pressure in the furnace. If the gas does not ignite when it is delivered, or the gas is ignited and then extinguished, the cause should be immediately found out, the mixed gas in the furnace should be exhausted, and then ignition should be carried out; c. Flashback, flameout, flameout and other phenomena are not allowed to occur during operation. Otherwise, it should be eliminated in time. If it cannot be eliminated, the furnace should be stopped immediately. 7.4.7 When working with gas (such as blind plates for gas extraction) or gas pipes, warning signs should be hung in conspicuous places, and gas protection or medical personnel should be present. Operators should wear gas masks and take reliable safety measures. 7.4.8 When stopping gas for maintenance, the following regulations should be followed: a. Cut off the gas source with a blind plate; for temporary maintenance outside the system, the gas can be cut off with a water seal, but a special person must be assigned to watch over it; if a fire is required, combustibles should be removed first, fire extinguishing equipment should be prepared, and steam or nitrogen should be used for purging. The operation can only be carried out after the carbon monoxide concentration is lower than c.
30mg/m3 or the biological test is clear. 7.4.9 In the event of gas poisoning, fire, explosion, or large-scale gas leakage, the accident site should be quickly clarified and effective measures should be taken to prevent risky rescue and expansion of the accident. And report to the dispatching room and gas protection station immediately. If a gas fire occurs, the fire alarm should be called immediately. If a gas poisoning accident occurs, the nearby health center should be notified immediately. 7.4.10 The accident site should be marked out as a dangerous area, and sentries should be arranged to prevent non-rescue personnel from entering. Rescue personnel entering the gas danger zone must wear oxygen respirators, and it is strictly forbidden to use gauze masks or other equipment that is not suitable for preventing gas poisoning. 7.4.11 Gas supply to gas facilities shall not be restored without finding out the cause of the accident and taking necessary safety measures. 7.4.12 When a gas facility catches fire, the gas pressure should be gradually reduced and steam or nitrogen should be passed in, but the minimum gas pressure in the facility shall not be less than 100Pa. It is strictly forbidden to suddenly close the gas valve or seal the water seal to prevent backfire explosion. 7.5 Air compressor station and acetylene station
7.5.1 The air compressor station should be away from places where explosive, corrosive and toxic gases and dust and other harmful substances are emitted, and should be located on the leeward side of the minimum frequency wind direction of the above-mentioned places throughout the year.
7.5.2 The clear distance between the vertical gas storage tank in the air compressor station and the outer wall of the machine room shall not be less than half the height of the gas storage tank. 7.5.3 Acetylene stations are strictly prohibited from being set up in areas that are easily flooded, densely populated areas and major traffic arteries, and should have good natural ventilation.
GB15600-—1995
7.5.4 Acetylene stations should be equipped with separate walls or fences. Unrelated personnel are strictly prohibited from entering. Open flames shall not be used within 30m around. The clear distance between the wall or fence and the building with explosion hazard, the edge of the slag pit and the outer wall of outdoor acetylene equipment in the acetylene station shall not be less than 3.5m for solid walls and 5m for hollow walls (or fences).
7.5.5 Calcium carbide warehouses shall be built separately and shall not be located in low-lying waterlogged areas. The ground shall be higher than the surrounding ground by more than 0.5m. The warehouse shall be well ventilated and it is prohibited to lay water pipes and steam pipes. It is strictly forbidden to store calcium carbide in the basement. 7.5.6 Fireworks are strictly prohibited in acetylene generating stations and calcium carbide warehouses. Firefighting equipment such as carbon dioxide fire extinguishers and dry sand must be available. Tools that easily generate sparks must not be used.
7.6 Gas Cylinders
7.6.1 Oxygen cylinders, hydrogen cylinders, acetylene cylinders, etc. must not be exposed to the sun, must not be placed near furnaces, roasting furnaces, graphitization furnaces, gas generators, boilers and various kilns, must not be placed near heaters and stoves, and must not be less than 10m away from open flames. 7.6.2 Oxygen cylinders are strictly prohibited from contacting with oil. Hydrogen cylinders and liquid chlorine cylinders, hydrogen cylinders and oxygen cylinders, liquid fluorine cylinders and liquid ammonia cylinders, etc. must not be mixed in the same warehouse.
7.6.3 The storage, transportation and use of acetylene cylinders shall comply with the following regulations: The ambient temperature shall not exceed 40°C in general, otherwise, cooling measures shall be taken; a.
The storage quantity at the use site shall no
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