Some standard content:
National Standard of the People's Republic of China
Technical safety regulation for gaseous hydrogen useUDC 614. 83:661. 96
GB 4962-85
To prevent In the event of fire or explosion accidents caused by hydrogen, this standard stipulates the safety technology for the use of hydrogen to protect the lives of employees and avoid losses to national property.
This standard applies to hydrogen supply stations, hydrogen supply devices and hydrogen supply operations where bottled hydrogen is the gas source. In addition to the implementation of this standard, the use of hydrogen should also comply with the requirements of current national regulations and procedures for other issues not specified. 1 Glossary
1.1 Hydrogen supply station
The collective name for the bus bar room, the real bottle room and the empty bottle room. 1.2 Hydrogen supply device (or hydrogen supply system)
A combination of equipment, pipelines and accessories for storing and transporting hydrogen. 1.3 Gas cylinder
is the collective name for empty bottles and full bottles.
1.4 real cylinder
A gas cylinder under a certain filling pressure is generally calculated based on a water capacity of 40 liters and a pressure of 150 kgf/cm2. 1.5 Empty bottles
Gas bottles without pressure or under a certain residual pressure. 1.6 Container bottle
A combined unit of several gas bottles fixed with a frame. 1.7 Vent pipe
A facility that directly discharges hydrogen into the atmosphere. 1.8 Flame arrester
A safety device to prevent hydrogen flashback. 1.9 Moisture-containing hydrogen
Hydrogen that has a constant relative humidity and can reach saturation and precipitate moisture during transportation. 1.10 Open flame locations
Fixed locations with exposed flames or red hot surfaces indoors and outdoors. 1.11 Locations that emit sparks
There are smoke patterns from flying fire or fixed locations such as outdoor grinding wheels, electric welding, gas welding and electrical switches. 2 Hydrogen supply station
2.1 The general layout of the hydrogen supply station in the factory area should meet the following requirements 2.1.1 The hydrogen supply station should be arranged at the edge of the factory area, in an area with convenient vehicle access, and as close as possible to the main hydrogen consumption location . 2.1.2 The fire separation distance in the layout of the hydrogen supply station should not be less than the requirements in the table below. Released by the National Bureau of Standards on March 1, 1985
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Implemented on November 01, 1985
Name
Fire resistance rating of other buildings
GB 4962- -85
Fire protection distance table for hydrogen supply station layout
Name
·, Level 2
Three
Four
Class A Item warehouse
Outdoor substation, power distribution station
Civil buildings
Important public buildings
Open fire or spark-emitting location
500
Sink Type flammable gas storage tank, meter"
Sink type oxygen storage tank, meter"
Flammable liquid storage tank, meter"
Combustible liquid storage tank
Coal and Coke, tons
Railway outside the factory (center line)
Railway inside the factory (center line)
Road outside the factory (roadside)
Main road inside the factory (road Side)
『Inner secondary road (roadside)
Level
Level
50110000
10000
1000||tt| |>1000
1~50
51~200
201~1000
1001~5000
Minimum fire separation distance, meters
12
14
16
20
25
25
50
30
12| |tt||15
20
10
12
15
19
25
31||tt ||According to 5 meters? Flammable liquid is equal to 1 meter. "Flammable liquid is converted into 100~5000
>5000
6
8
30
20
15
10www.bzxz.net
5
Note: () The fire separation distance between buildings is calculated based on the shortest distance of adjacent exterior walls. If there are protruding burning objects on the exterior wall, the garbage should be installed from the outer edge of the protruding part; the fire separation distance of storage tanks and transformers should be calculated from the outer wall closest to the building. (2) The exterior walls adjacent to the hydrogen supply station and other buildings are all non-combustible, and have no doors, windows, holes, or exposed combustible eaves. The fire protection distance is reduced by 25% according to this table.
) A fixed volume combustible gas storage tank shall be based on the product of its water capacity (m\) and working pressure (kgf/cm\), and shall be implemented in accordance with the requirements for water tank storage tanks in this table.
) The fire separation distance between hydrogen supply stations and overhead power lines should not be less than 1.5 times the height of the telephone poles. The hydrogen supply station should be an independent single-story building, and its fire resistance rating should not be lower than Level 2. 2.2
hydrogen supply stations are not allowed to be installed in the basement or semi-basement of a building. When the number of actual bottles does not exceed 60 bottles, it can be adjacent to a hydrogen-using factory with a fire resistance rating of not less than Level 2, or a factory or Class E factory with a fire resistance rating of not less than Level 2 for non-open flame operations, but the adjacent wall should be Firewall without doors, windows or holes. 2.3 Oxygen supply station! The explosion-proof design of the house should be implemented in accordance with the relevant provisions of TJ16-74 "Code for Fire Protection Design of Buildings" (Trial). The upper limit of the ratio of pressure relief area to room volume should not be underestimated. 2.4 The height of the bottom chord of the roof truss of the hydrogen supply station should not be less than 4 meters (the height of the container station building should not be less than 6 meters). 2.5 The roof should be made into a flat structure to prevent dead corners where hydrogen gas accumulates. The floor should be as smooth, wear-resistant and non-sparking as possible, and should be at the same height as the loading and unloading platform.
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GB4962-85
2.6 The layout of busbar room, empty bottle room and solid bottle room shall meet the following requirements: 2.6.1 Busbar room, empty bottle room and solid bottle room The bottle rooms should be set up separately (except for the container bottle station building). The busbar room can be connected to the empty bottle room or the real bottle room through the door opening, but each must have an independent entrance and exit. 2.6.2 When the number of real bottles does not exceed 60 bottles, empty bottles, real bottles and busbars can be arranged in the same room, but real bottles and empty bottles should be stored separately. The clear distance between empty (solid) bottles and the busbar should not be less than 2 meters. 2.6.3 The busbar room, empty bottle room and solid bottle room should not be directly connected with the instrument room, power distribution room and living room, and should be separated by firewalls without doors, windows or holes. If connectivity is required, a double-door bucket room should be set up. The door should be automatically closed (such as a spring door), and the fire resistance limit should not be less than 0.9 hours. 2.6.4 The empty bottle room and the full bottle room should have brackets, fences and other facilities to prevent bottles from falling over. 2.6.5 The net width of the passages in the busbar room, empty bottle room and solid bottle room should be determined according to the transportation method of the gas cylinder, and generally should not be less than 1.5 meters. 2.6.6 The busbars should be as wide as possible. The busbar should be arranged against the wall, and a special frame for fixing the gas cylinder should be provided. 2.6.7 There should be shading measures between the actual cylinders to prevent direct sunlight from shining on the cylinders. 2.6.8 A gas cylinder loading and unloading platform should be installed between the empty bottle room and the full bottle room. The height of the platform is determined by the gas cylinder transportation tool. It is generally 0.4 to 1.1 meters higher than the outdoor floor. The width of the platform is 1.5 to 2 meters. Rainfall and supports on platforms should be made of non-combustible materials. The container station building should be equipped with explosion-proof lifting facilities. 2.7 The room must be well ventilated to ensure that the maximum hydrogen content in the air does not exceed 1% (volume ratio)*. A transom (floor) or exhaust hole is provided on the top of the building or on the upper part of the exterior wall. The exhaust holes should face the safe zone, the indoor air exchange rate should not be less than three times per hour, and the emergency ventilation rate should not be less than seven air changes per hour. 2.8 The selection, wiring and grounding of electrical equipment should comply with the relevant provisions of the national "Electrical Safety Regulations for Explosive Hazardous Locations". 2.9 Hydrogen supply stations should have lightning protection measures.
2.10 Set fire prohibition signs around the hydrogen supply station in accordance with the provisions of GB2894-82 "Safety Signs". 3 Hydrogen supply device
3.1 Hydrogen cylinder
The design, manufacture and inspection of hydrogen cylinders shall comply with the requirements of the "Gas Cylinder Safety Supervision Regulations". 3.2 Container bottles
3.2.1 The total weight of each unit shall not exceed 2 tons. The safety factor of container clamps and lifting rings shall not be less than 9. Cylinders, pipelines, valves and joints should be fixed and must not be loose or displaced. Pipelines and valves should have protective devices to prevent collisions. 3.2.2 The main pipeline should have two valves connected in series, and each group of gas cylinders should have separate valves. 3.3 Fixed volume gas storage tank
3.3.1 The gas storage tank should be equipped with a vent valve, a safety valve and a pressure gauge. When the maximum working pressure is greater than or equal to 1 kgf/cm2, its design, manufacturing and inspection shall comply with the requirements of the "Pressure Vessel Safety Supervision Regulations". 3.3.2 The foundation and support of the gas storage tank must be solid and non-combustible. 3.3.3. The floor of the gas storage tank should be higher than the floor of adjacent Class A and B production units that emit combustible gases and combustible vapors. Otherwise, a solid wall with a height of not less than 1 meter should be set up to isolate it. 3.3.4 The fire protection distance of the gas storage tank in the plane layout shall be implemented in accordance with the relevant provisions of the fire protection distance of flammable gas storage tanks in TJ16-74. 3.4 Pipes
3.4.1 Pipes and accessories should be selected to comply with national standards and specifications, and should meet the requirements of hydrogen working pressure and temperature. Hydrogen pipelines should be seamless metal pipes, and cast iron pipes are prohibited. 3.4.2 Pipe connections should generally use welding or other connection methods that effectively prevent air leakage. 3.4.3 The pipeline should be equipped with a vent pipe, a sampling port and a purge port, and their locations should be able to meet the requirements for gas purging and replacement in the pipeline. 3.4.4 When hydrogen is used for welding, cutting, fuel and protective gas, etc., a flame arrester should be installed on the branch pipe of each hydrogen equipment (group). ＊The same below
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3.4.5 Pipe laying should comply with the following requirements: GB4962-85
3.4.5.1 The hydrogen gas channel should be laid overhead, and its bracket should be a non-combustible body . Overhead pipes should not be laid on the same support as cables and conductive lines.
When hydrogen pipelines are laid parallel to gas pipelines and oxygen pipelines, they should be separated by non-combustible material pipelines, or the net distance should not be less than 250 mm. When laying in layers, the hydrogen pipeline should be at the top. The minimum clear distance between hydrogen pipelines and buildings, structures or other pipelines can be implemented in accordance with relevant regulations. 3.4.5.2 Indoor pipelines should not be laid in trenches or directly buried in the ground. Pipes laid in outdoor trenches should have measures to prevent hydrogen from leaking, accumulating or escaping into other trenches. The burial depth of pipelines laid underground should not be less than 0.7 meters. Pipes containing moist hydrogen should be laid below the frozen layer. 3.4.5.3 Where the pipes pass through walls or floors, casings should be installed. There should be no welds in the pipe sections, and non-combustible materials should be filled between the pipes and casings. .
3.4.5.4 Pipes should avoid passing through ditches, sewers, railways and automobile roads, etc. When they must pass through, they should be equipped with casings. 3.4.5.5 Pipes must not pass through living rooms, offices, distribution rooms, and instrument rooms. , stairwells and other rooms that do not use hydrogen. It is not suitable to pass through the suspended ceiling or technical (mezzanine) layer. When it is necessary to pass through the suspended ceiling or technical (mezzanine) layer, safety measures should be taken 3.4.6 Indoor and outdoor overhead or buried laying. The pipelines and busbars and the connected gas cylinders should be five-phase jumper and grounded. The jumper and grounding measures should be carried out in accordance with the relevant national regulations. 3.5 Vent pipe
3.5.1 Vent the hydrogen storage tank. Valves, safety valves and piping systems should be equipped with vent pipes. 3.5.2 The vent pipes should be made of metal. Plastic pipes or rubber pipes are not allowed. 3.5.3 The vent pipes should be equipped with flame arresters. Where conditions permit, they can be used. Connect to fire extinguishing steam or inert gas pipelines to prevent fire. 3.5.4 The outlet of the indoor vent pipe should be more than 2 meters above the roof. The vent pipe of outdoor equipment should be more than 2 meters higher than the highest equipment operated nearby.
3.5.5 The vent pipe should be electrostatically grounded and within the scope of lightning protection. 3.5.6 Measures should be taken to prevent rain and snow from intruding and foreign matter blocking the vent pipe. 4 Safety points for hydrogen system operation| |tt||4.1 The oxygen content of the hydrogen input into the system shall not exceed 0.5%. 4.2 When the hydrogen system is in operation, no knocking, no repair and tightening under pressure, no overpressure, and no negative pressure are allowed. When the water seal device is frozen, it can only be thawed by heating with hot water or steam. It is strictly prohibited to use open flames for baking. 4.4 To check for leaks at the connection points of equipment, pipes and valves, soapy water or a portable flammable gas explosion-proof detector can be used. It is prohibited to use it. Open fire,
4.5 Do not discharge hydrogen indoors. Purge and replace, vent and reduce pressure, must be discharged through the vent pipe. 4.6 When a large amount of hydrogen leaks or accumulates, the gas source should be cut off immediately and ventilated. Cutting operations that may cause sparks are not allowed.
4.7 The newly installed or overhauled hydrogen system must undergo a pressure test, cleaning and air tightness test, and must meet the relevant inspection requirements before it can be put into use
4.8 Hydrogen. For system purging and replacement, nitrogen (or other inert gas) replacement method or water injection and exhaust method can generally be used. The nitrogen retention and replacement method should meet the following requirements:
4.8.1 The oxygen content in nitrogen shall not exceed 3 %. 4.8.2 Wing replacement must be thorough to prevent residual air from remaining in the dead end. 4.8.3 After the replacement is completed, the oxygen or hydrogen content in the system must pass three consecutive analyses. 4.9 During fire maintenance of the hydrogen system, it must be ensured that the maximum hydrogen content inside the system and in the fire area does not exceed 0.4%. 4.70 Prevent open flames and other igniting energy sources. It is prohibited to use electric furnaces, electric drills, stoves, blowtorches, etc. - any tools and hot objects that produce nue flames or high temperatures: Do not bring fire into fire-free areas; use copper or beryllium copper alloy. Tools: Wear cotton overalls and anti-static shoes . 17
Use of 5 hydrogen cylinders
GB 4962--85
5.1 Due to production needs, gas cylinders must be used on site (indoors). The number shall not exceed 5 bottles and shall comply with The following requirements: 5.1.1 Ventilation conditions are the same as 2.7.
5.1.2 The distance between hydrogen cylinders and containers and cylinders containing flammable, explosive, combustible substances and oxidizing gases should not be less than 8 meters. 5.1.3 The distance from open flames or ordinary electrical equipment should not be less than 10 meters. 5.1.4 The distance from air suction outlets such as air conditioning units, air compressors and ventilation equipment should not be less than 20 meters. 5.1.5 The distance from other flammable gas storage locations should not be less than 20 meters. 5.1.6 A bracket is provided to fix the gas cylinder.
When using gas cylinders in multi-story buildings, except for special production needs, they should generally be placed on the top floor near the outer wall. 5.1.7
5.2 When using gas cylinders, knocking or collision is prohibited; do not approach heat sources; avoid exposure to the sun in summer. 5.3 A special pressure reducer must be used. When opening, the operator should stand behind the valve port and move gently. 5.4. When the valve or pressure reducer leaks, it is not allowed to continue to be used; when the valve is damaged, it is strictly prohibited to replace the valve when there is pressure in the bottle. 5.5 It is strictly forbidden to use up the gas in the bottle, and a residual pressure of more than 0.5 kgf/cm2 should be retained. 6 Firefighting
6.1 The hydrogen supply station should be equipped with fire-fighting water in accordance with the relevant provisions of TJ16-74, and should be equipped with portable fire-extinguishing equipment such as "dry powder", "1211" and "carbon dioxide" or nitrogen and steam fire-extinguishing systems as needed. 6.2 The following measures should be taken for hydrogen fire:
6.2.1 Cut off the gas source.
6.2.2 Cool and isolate to prevent the fire from expanding. 6.2.3 Maintain the positive pressure of the hydrogen system to prevent backfire. . 6.3 Hydrogen flames are not easy to detect, and rescuers should prevent burns on exposed skin.
This standard was drafted by Zhu Yucheng and Chen Bainian of the Ministry of Labor and Personnel.
5 Pipes must not pass through living rooms, offices, distribution rooms, instrument rooms, stairwells and other rooms that do not use hydrogen. It is not advisable to pass through the suspended ceiling or technical (mezzanine) layer. When it is necessary to pass through the suspended ceiling or technical (mezzanine) layer, safety measures should be taken. 3.4.6 Indoor and outdoor pipes and busbars laid overhead or buried and the gas cylinders connected to them should be five-phase jumper and grounded. The jumper and grounding measures should be implemented in accordance with the current relevant national regulations. 3.5 Vent pipe
3.5.1 The vent valve, safety valve and piping system of the hydrogen storage tank should all be equipped with vent pipes. 3.5.2 The vent pipe should be made of metal material, plastic pipes or rubber pipes are not allowed. 3.5.3 The vent pipe should be equipped with a flame arrester. Where conditions permit, it can be connected to fire-extinguishing steam or inert gas pipelines to prevent fire. 3.5.4 The outlet of the indoor vent pipe should be more than 2 meters above the roof. The vent pipe of outdoor equipment should be at least 2 meters higher than the tallest equipment operated nearby.
3.5.5 The vent pipe should be electrostatically grounded and within the scope of lightning protection. 3.5.6 Measures should be taken to prevent the intrusion of rain and snow and foreign matter from clogging the vent pipe. 4 Safety points for hydrogen system operation
4.1 The oxygen content of the hydrogen input into the system shall not exceed 0.5%. 4.2 When the hydrogen system is in operation, no knocking is allowed, no repairs and tightening are allowed under pressure, no overpressure is allowed, and negative pressure is strictly prohibited. 4.3 When pipes, valves and water sealing devices are frozen, they can only be thawed by heating with hot water or steam. It is strictly forbidden to bake them with an open flame. 4.4 To check for leaks at connection points such as equipment, pipelines and valves, soapy water or a portable flammable gas explosion-proof detector can be used. Open flames are prohibited.
4.5 Hydrogen gas is not allowed to be discharged indoors. Purge and replace, vent and reduce pressure, must be discharged through the vent pipe. 4.6 When a large amount of hydrogen leaks or accumulates, the gas source should be cut off immediately and ventilation should be carried out. Cutting operations that may cause sparks should not be performed.
4.7 The newly installed or overhauled hydrogen system must undergo pressure test, cleaning and air tightness test, and comply with relevant inspection requirements. Before it can be put into use
4.8 The hydrogen system is purged and replaced. Generally, nitrogen (or other inert gas) replacement method or water injection exhaust method can be used. The nitrogen retention and replacement method should meet the following requirements:
4.8 .1 The oxygen content in the nitrogen must not exceed 3%. 4.8.2 The wing replacement must be thorough to prevent residual gas at the end of the dead end. 4.8.3 After the replacement is completed, the oxygen or hydrogen content in the system must be qualified three times in a row. For fire maintenance, it is necessary to ensure that the maximum hydrogen content inside the system and in the fire area does not exceed 0.4%. 4.70 Prevent open flames and other energizing energy. It is prohibited to use electric furnaces, electric drills, stoves, blowtorches, etc. - tools and heat that generate ignition and heat. Objects: Do not bring fire into the fire-restricted area; use copper or beryllium copper alloy. Tools: Wear cotton work clothes and anti-static shoes. 17
5 Hydrogen cylinder use
GB 4962--85| |tt||5.1 Due to production needs, gas bottles must be used on site (indoors), and the number shall not exceed 5 bottles, and shall meet the following requirements: 5.1.1 Ventilation conditions are the same as 2.7
5.1.2 Hydrogen. The distance between bottles and containers and gas bottles containing flammable, explosive, combustible substances and oxidizing gases should not be less than 8 meters. 5.1.3 The distance between open flames or ordinary electrical equipment should not be less than 10 meters. The distance between air suction outlets such as devices, air compressors and ventilation equipment should not be less than 20 meters. 5.1.5 The distance between other flammable gas storage locations should be no less than 20 meters. 5.1.6 Brackets for fixed gas bottles should be provided. tt||When using gas cylinders in multi-story buildings, except for special production needs, they should generally be placed on the top floor near the outer wall. 5.1.7
5.2 When using gas cylinders, knocking and collision are prohibited; and they must not be placed near heat sources. ; Avoid exposure to the sun in summer. 5.3 A special pressure reducer must be used. When opening, the operator should stand behind the valve port and move slowly. 5.4. If the valve or pressure reducer leaks, do not continue to use it; the valve is damaged. It is strictly forbidden to replace the valve when there is pressure in the bottle. 5.5 The gas in the bottle is strictly prohibited, and a residual pressure of more than 0.5 kgf/cm2 should be retained. 6. Fire protection
6.1 The hydrogen supply station should be in accordance with TJ16. The relevant provisions of 74 are to provide fire-fighting water, and should be equipped with portable fire-extinguishing equipment such as "dry powder", "1211" and "carbon dioxide" or nitrogen and steam fire-extinguishing systems as needed. 6.2 If hydrogen catches fire, the following measures should be taken:
6.2.1 Cut off the gas source.
6.2.2 Cooling and isolation to prevent fire expansion. 6.2.3 Maintain positive pressure in the hydrogen system to prevent backfire. 6.3 Hydrogen flames are difficult to detect, and rescuers should prevent burns to exposed skin. Additional notes:
This standard is proposed by the Labor Protection Bureau of the Ministry of Labor and Personnel. This standard was drafted by Zhu Yucheng and Chen Bainian of Shanghai Labor Protection Research Institute. 18
5 Pipes must not pass through living rooms, offices, distribution rooms, instrument rooms, stairwells and other rooms that do not use hydrogen. It is not advisable to pass through the suspended ceiling or technical (mezzanine) layer. When it is necessary to pass through the suspended ceiling or technical (mezzanine) layer, safety measures should be taken. 3.4.6 Indoor and outdoor pipes and busbars laid overhead or buried and the gas cylinders connected to them should be five-phase jumper and grounded. The jumper and grounding measures should be implemented in accordance with the current relevant national regulations. 3.5 Vent pipe
3.5.1 The vent valve, safety valve and piping system of the hydrogen storage tank should all be equipped with vent pipes. 3.5.2 The vent pipe should be made of metal material, plastic pipes or rubber pipes are not allowed. 3.5.3 The vent pipe should be equipped with a flame arrester. Where conditions permit, it can be connected to fire-extinguishing steam or inert gas pipelines to prevent fire. 3.5.4 The outlet of the indoor vent pipe should be more than 2 meters above the roof. The vent pipe of outdoor equipment should be at least 2 meters higher than the tallest equipment operated nearby.
3.5.5 The vent pipe should be electrostatically grounded and within the scope of lightning protection. 3.5.6 Measures should be taken to prevent the intrusion of rain and snow and foreign matter from clogging the vent pipe. 4 Safety points for hydrogen system operation
4.1 The oxygen content of the hydrogen input into the system shall not exceed 0.5%. 4.2 When the hydrogen system is in operation, no knocking is allowed, no repairs and tightening are allowed under pressure, no overpressure is allowed, and negative pressure is strictly prohibited. 4.3 When pipes, valves and water sealing devices are frozen, they can only be thawed by heating with hot water or steam. It is strictly forbidden to bake them with an open flame. 4.4 To check for leaks at connection points such as equipment, pipelines and valves, soapy water or a portable flammable gas explosion-proof detector can be used. Open flames are prohibited.
4.5 Hydrogen gas is not allowed to be discharged indoors. Purge and replace, vent and reduce pressure, must be discharged through the vent pipe. 4.6 When a large amount of hydrogen leaks or accumulates, the gas source should be cut off immediately and ventilation should be carried out. Cutting operations that may cause sparks should not be performed.
4.7 The newly installed or overhauled hydrogen system must undergo pressure test, cleaning and air tightness test, and comply with relevant inspection requirements. Before it can be put into use
4.8 The hydrogen system is purged and replaced. Generally, nitrogen (or other inert gas) replacement method or water injection exhaust method can be used. The nitrogen retention and replacement method should meet the following requirements:
4.8 .1 The oxygen content in the nitrogen must not exceed 3%. 4.8.2 The wing replacement must be thorough to prevent residual gas at the end of the dead end. 4.8.3 After the replacement is completed, the oxygen or hydrogen content in the system must be qualified three times in a row. For fire maintenance, it is necessary to ensure that the maximum hydrogen content inside the system and in the fire area does not exceed 0.4%. 4.70 Prevent open flames and other energizing energy. It is prohibited to use electric furnaces, electric drills, stoves, blowtorches, etc. - tools and heat that generate ignition and heat. Objects: Do not bring fire into the fire-restricted area; use copper or beryllium copper alloy. Tools: Wear cotton work clothes and anti-static shoes. 17
5 Hydrogen cylinder use
GB 4962--85| |tt||5.1 Due to production needs, gas bottles must be used on-site (indoors), and the number shall not exceed 5 bottles, and shall meet the following requirements: 5.1.1 Ventilation conditions are the same as 2.7
5.1.2 Hydrogen. The distance between bottles and containers and gas bottles containing flammable, explosive, combustible substances and oxidizing gases should not be less than 8 meters. 5.1.3 The distance between open flames or ordinary electrical equipment should not be less than 10 meters. The distance between air suction outlets such as devices, air compressors and ventilation equipment should not be less than 20 meters. 5.1.5 The distance between other flammable gas storage locations should be no less than 20 meters. 5.1.6 Brackets for fixed gas bottles should be provided. tt||When using gas cylinders in multi-story buildings, except for special production needs, they should generally be placed on the top floor near the outer wall. 5.1.7
5.2 When using gas cylinders, knocking and collision are prohibited; and they must not be placed near heat sources. ; Avoid exposure to the sun in summer. 5.3 A special pressure reducer must be used. When opening, the operator should stand behind the valve port and move slowly. 5.4. If the valve or pressure reducer leaks, do not continue to use it; the valve is damaged. It is strictly forbidden to replace the valve when there is pressure in the bottle. 5.5 The gas in the bottle is strictly prohibited, and a residual pressure of more than 0.5 kgf/cm2 should be retained. 6. Fire protection
6.1 The hydrogen supply station should be in accordance with TJ16. The relevant provisions of 74 are to provide fire-fighting water, and should be equipped with portable fire-extinguishing equipment such as "dry powder", "1211" and "carbon dioxide" or nitrogen and steam fire-extinguishing systems as needed. 6.2 If hydrogen catches fire, the following measures should be taken:
6.2.1 Cut off the gas source.
6.2.2 Cooling and isolation to prevent fire expansion. 6.2.3 Maintain positive pressure in the hydrogen system to prevent backfire. 6.3 Hydrogen flames are difficult to detect, and rescuers should prevent burns to exposed skin. Additional notes:
This standard is proposed by the Labor Protection Bureau of the Ministry of Labor and Personnel. This standard was drafted by Zhu Yucheng and Chen Bainian of Shanghai Labor Protection Research Institute. 18
1 The hydrogen supply station should be equipped with fire-fighting water in accordance with the relevant provisions of TJ16-74, and should be equipped with portable fire-extinguishing equipment such as "dry powder", "1211" and "carbon dioxide" or nitrogen and steam fire-extinguishing systems as needed. 6.2 The following measures should be taken in case of hydrogen fire :
6.2.1 Cut off the gas source.
6.2.2 Cool and isolate to prevent the fire from expanding. 6.2.3 Keep the hydrogen system under positive pressure to prevent backfire. 6.3 The hydrogen flame is not easy to detect. Rescuers should prevent exposed skin from being burned. Additional notes:
This standard was proposed by the Labor Protection Bureau of the Ministry of Labor and Personnel. This standard was drafted by Zhu Yucheng and Chen Bainian of the Shanghai Labor Protection Research Institute 18
1 The hydrogen supply station should be equipped with fire-fighting water in accordance with the relevant provisions of TJ16-74, and should be equipped with portable fire-extinguishing equipment such as "dry powder", "1211" and "carbon dioxide" or nitrogen and steam fire-extinguishing systems as needed. 6.2 The following measures should be taken in case of hydrogen fire :
6.2.1 Cut off the gas source.
6.2.2 Cool and isolate to prevent the fire from expanding. 6.2.3 Maintain positive pressure in the hydrogen system to prevent backfire. 6.3 The hydrogen flame is not easy to detect. Rescuers should prevent exposed skin from being burned. Additional notes:
This standard was proposed by the Labor Protection Bureau of the Ministry of Labor and Personnel. This standard was drafted by Zhu Yucheng and Chen Bainian of the Shanghai Labor Protection Research Institute 18
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