GB 50516-2010(2021) in English

1 General provisions
1.0.2 This code is applicable to the design, construction and building of the constructed, renovated and extended hydrogen fuelling station.
2 Terms
2.0.1 hydrogen fuelling station
special location filling hydrogen fuel for hydrogen storage cylinder of hydrogen fuel cell vehicle or hydrogen internal-combustion engine vehicle or hydrogen and natural gas fuelled vehicle
2.0.2 system of hydrogen produced on site
hydrogen production system set up in the hydrogen fuelling station, which is usually the general name of system for hydrogen production, purification, compression and its supporting facilities
2.0.3 This subclause is deleted.
2.0.4 This subclause is deleted.
2.0.7 This subclause is deleted.
2.0.8 hydrogen dispenser
special equipment for filling hydrogen storage cylinders of transportation means with control, metering and pricing functions
2.0.9 This subclause is deleted.
2.0.9A stationary pressure vessels for storage of hydrogen
fixed pressure vessels for storing hydrogen fuel, including pressure vessels for storage of gaseous hydrogen, pressure vessels for storage of liquid hydrogen and pressure vessels for storage of metal hydride, which are referred to as hydrogen storage vessels for short
2.0.10 pressure vessels for storage of gaseous hydrogen
pressure vessels for storage of gaseous hydrogen, including necessary safety accessories as well as pressure inspection and displaying instruments
2.0.11 cylinder assemblies for storage of gaseous hydrogen
integral hydrogen storage facility assembled with several cylinders for storage of gaseous hydrogen, including corresponding connecting pipelines, valves, safety accessories, etc.
2.0.11A pressure vessels for storage of liquid hydrogen
pressure vessel for storage of liquid hydrogen, including insulation system, necessary safety device, pressure and liquid level displaying instruments, etc.
2.0.11B pressure vessels for storage of metal hydride
hydrogen storage pressure vessel filled with reversible metal hydrides, including heat exchanging system, necessary safety accessories as well as pressure inspection and displaying instruments, etc.
2.0.11C liquid hydrogen booster pump
equipment for boosting the pressure of liquid hydrogen to that required by hydrogen dispenser
2.0.12 This subclause is deleted.
2.0.13 This subclause is deleted.
2.0.15 vent unit
device specially for discharging hydrogen from equipment and pipeline system in hydrogen fuelling station
2.0.18 tube trailers for gaseous hydrogen
road transport vehicle formed by permanently connecting the hydrogen storage cylinder to semitrailer traveling mechanism or approved undercarriage through supporting end plate or frame
2.0.18A tube skid container for gaseous hydrogen
mobile pressure vessel for transporting compressed hydrogen formed by permanently connecting a single hydrogen storage cylinder with a nominal water volume of 1,000L~4,200L to components such as pipeline, safety accessories, instruments and filling and discharging accessories through supporting end plate or frame
2.0.19 liquid hydrogen lorry truck
transport vehicle equipped with liquid hydrogen storage tank, which is equipped with corresponding connecting pipelines, valves and safety accessories
2.0.20 tank containers for liquid hydrogen
tank container equipped with liquid hydrogen storage tank, which is equipped with corresponding connecting pipelines, valves and safety accessories
2.0.21 state of charge (SOC)
ratio of the density of hydrogen in the hydrogen storage cylinder after fuelling to that under nominal working pressure at a gas temperature of 15℃
2.0.22 materials in contact with hydrogen
materials in direct contact with hydrogen during normal operation of hydrogen fuelling station
3 Basic requirements
3.0.1 Hydrogen fuelling station shall be designed in combination with hydrogen supply mode. In the hydrogen fuelling station, hydrogen may be supplied by the transport via tube trailers for gaseous hydrogen, tube skid container for gaseous hydrogen, liquid hydrogen lorry truck, tank containers for liquid hydrogen, or through pipeline transportation and system of hydrogen produced on site. The hydrogen fuelling station may be jointly constructed with natural gas fuelling station or gasoline filling station.
3.0.2 This subclause is deleted.
3.0.2A The grading of hydrogen fuelling station shall be in accordance with those specified in Table 3.0.2A.
Table 3.0.2A Grading of hydrogen fuelling station
Grade Capacity of hydrogen storage vessel (kg)
Total capacity G Capacity of single tank
Grade I 5,000≤G≤8,000 ≤2,000
Grade II 3,000 Grade III G≤3,000 ≤800
Note: The single tank capacity of liquid hydrogen tank is not limited by the single tank capacity in this table.
3.0.3 The capacity of hydrogen storage vessel in hydrogen fuelling station shall be determined according to factors such as hydrogen source, quantity of hydrogen fuel cell vehicle and hydrogen and natural gas fuelled vehicle, hydrogen fuelling capacity of each vehicle and fuelling time as well as pressure grade of hydrogen storage vessel. For vehicles transporting hydrogen, such as tube trailers for gaseous hydrogen, tube skid container for gaseous hydrogen, liquid hydrogen lorry truck and tank containers for liquid hydrogen, when used as hydrogen storage facilities in the hydrogen fuelling station, their capacity shall be included in the total capacity.
3.0.4 This subclause is deleted.
3.0.5 This subclause is deleted.
3.0.8 If system of hydrogen produced on site is equipped in hydrogen fuelling station, it shall meet those specified in this Code as well as the relevant requirements of the current national standard GB 50177 Design code for hydrogen station.
3.0.9 This subclause is deleted.
3.0.10 If mobile hydrogen fuelling facility is installed in the hydrogen fuelling station, in addition to the requirements of this Code, it shall also meet the relevant requirements of the current national standards such as GB/T 31139 Safety technical regulations for mobile hydrogen refueling facility.
4 Location selection
4.0.2 Grade I hydrogen fuelling station shall not be built in the urban central area.
4.0.3 The hydrogen fuelling station in urban central area should be close to urban road, but shall not be set near the intersection of urban main roads.
4.0.4 This subclause is deleted.
4.0.4A The fire protection distance between hydrogen process facilities of hydrogen fuelling station and off-station buildings and structures shall not be less than those specified in Table 4.0.4A.
Table 4.0.4A Fire protection distance between the hydrogen process facility of hydrogen fuelling station and off-station building and structure (m)
Item Hydrogen storage vessel Hydrogen compressor (room) and hydrogen dispenser Vent pipe orifice
Grade I Grade II Grade III
Important public building 50 50 50 35 50
Open fire or sparking site 40 35 30 20 30
Protection class of civil building Class I protective article 35 30 25 20 25
Class II protective article 30 25 20 14 20
Class III protective article 30 25 20 12 20
Fire resistance grade of production building and warehouse Grades I and II 25 20 15 12 25
Grade III 30 25 20 14
Grade IV 35 30 25 16
Class A article warehouse; Classes A, B and C liquid storage tanks; combustible material yard 35 30 25 18 25
Outdoor power transformation and distribution station 35 30 25 18 30
Railway 25 25 25 22 30
Urban road Expressway and arterial road 15 15 15 6 15
Sub-arterial road and branch road 10 10 10 5 10
Overhead communication line Shall not cross and shall not be less than 1 times of pole height
Overhead power line Shall not cross and shall not be less than 1.5 times of pole height
Notes:
1 The fire protection distance between portable process facilities of hydrogen fuelling station and off-station buildings and structures shall be determined according to the fire separation of corresponding facilities in this table.
2 The fire protection distance between process facilities of hydrogen fuelling station and suburb highways shall be determined according to urban road; expressway, Class I and Class II highways shall be determined according to urban expressway and arterial road; Class III and Class IV highways shall be determined according to urban sub-arterial road and branch road.
3 The fire protection distance between fixed place of tube trailers for gaseous hydrogen and tube skid container for gaseous hydrogen and off-station buildings and structures shall be determined according to the fire protection distance of hydrogen storage vessel in this table.
4 The railway shall be calculated by center line, and the urban road shall be calculated by adjacent roadside.
4.0.5 The protection classes of civil buildings shall be divided in accordance with the relevant requirements of the current national standard GB 50156 Code for design and construction of filling station.
4.0.6 This subclause is deleted.
4.0.7 This subclause is deleted.
4.0.8 The fire protection distance between water chilling unit and precooling units system and off-station buildings and structures should be determined according to the process requirements.
5 General layout
5.0.1 This subclause is deleted.
5.0.1A The fire protection distance between facilities in hydrogen fuelling station shall not be less than those specified in Table 5.0.1A.
5.0.2 The fence setting in hydrogen fuelling station shall meet the following requirements:
1 When the distance between process facilities of hydrogen fuelling station and off-station buildings and structures is less than or equal to 1.5 times of the fire separation distance specified in Table 4.0.4A and less than or equal to 25m, incombustible solid wall with height no less than 2.5m shall be built on the adjacent side;
2 When the distance between process facilities of hydrogen fuelling station and off-station buildings and structures is larger than 1.5 times of fire separation distance specified in Table 4.0.4A and larger than 25m, non-solid wall may be built on the adjacent side;
3 The side facing entrance and exit road should be open or partially provided with non-solid wall.
5.0.4 The road arrangement in hydrogen fuelling station shall meet the following requirements:
1 The width of single lane shall not be less than 3.5m, and that of double lane shall not be less than 6m;
2 The road turning radius in station shall be determined according to the type of running vehicle, and should not be less than 9m; the road gradient shall not be larger than 6%. The parking space of vehicles may not have a slope.
3 There shall be complete and penetrating personnel passages between areas in station, and the passage width should not be less than 1.5m .
5.0.6 This subclause is deleted.
5.0.7 The layout of tube trailers for gaseous hydrogen and tube skid container for gaseous hydrogen in hydrogen fuelling station shall meet the following requirements:
1 For the setting of the parking space of tube trailers for gaseous hydrogen and tube skid containers for gaseous hydrogen, its quantity shall be determined according to factors such as scale of hydrogen fuelling station, hydrogen production ability of the system of hydrogen produced on site, specifications of tube trailers for gaseous hydrogen and tube skid containers for gaseous hydrogen as well as turnover time;
2 If the tube trailers for gaseous hydrogen and tube skid containers for gaseous hydrogen are used as hydrogen storage vessels, the fire separation distance between fixed parking space and the facilities in the station shall be determined according to the fire separation distance of hydrogen storage vessel in Table 5.0.1A;
Table 5.0.1A Fire separation distance between facilities in hydrogen fuelling station (m)
Name of facility Hydrogen storage vessel Hydrogen production room Orifice of hydrogen vent pipe Hydrogen compressor room Hydrogen pressure regulating valve unit room Hydrogen dispenser Station house Fire pump room and fire pool water intake Other buildings and structures Gas-fueled (oil-fueled) furnace room, gas-fueled kitchen Power transformation and distribution room Road Fence of station area
Grade I Grade II Grade III
Hydrogen storage vessel Grade I - - - 15.0 - 9.0 5.0 10.0 10.0 30.0 12.0 14.0 12.0 5.0 5.0
Grade II - - - 10.0 - 9.0 5.0 8.0 8.0 20.0 12.0 12.0 10.0 4.0 5.0
Grade III - - - 8.0 - 9.0 5.0 6.0 8.0 20.0 12.0 12.0 9.0 3.0 5.0
Hydrogen production room - - - - - 9.0 9.0 4.0 15.0 15.0 15.0 14.0 12.0 5.0 3.0
Orifice of hydrogen vent pipe - - - - - 6.0 - 6.0 5.0 6.0 10.0 14.0 6.0 4.0 5.0
Hydrogen compressor room - - - - - - 4.0 4.0 5.0 8.0 10.0 12.0 6.0 2.0 2.0
Hydrogen pressure regulating valve unit room - - - - - - - 6.0 5.0 8.0 10.0 12.0 6.0 2.0 2.0
Hydrogen dispenser - - - - - - - - 5.0 6.0 8.0 12.0 6.0 - -
Station house - - - - - - - - - - 6.0 - - - -
Fire pump room and fire pool water intake - - - - - - - - - - 6.0 - - - -
Other buildings and structures - - - - - - - - - - - 5.0 - - -
Gas-fueled (oil-fueled) furnace room, gas-fueled kitchen - - - - - - - - - - - 5.0 - -
Power transformation and distribution room - - - - - - - - - - - - - -
Road - - - - - - - - - - - - - -
Fence of station area - - - - - - - - - - - - - -
Notes:
1 The fire separation distance between hydrogen dispenser and non-solid wall shall not be less than 5m.
2 The fire separation distance between portable process equipment and other facilities in station shall be determined according to the fire separation distance of hydrogen production room or corresponding equipment in this table.
3 The starting point of station house and power transformation and distribution room shall be door and window. Other buildings and structures refer to independently set vehicle washing room, lubricating oil storage and charge room, convenient stores of smallwares and toilets.
3 The discharge end of tube trailers for gaseous hydrogen and tube skid containers for gaseous hydrogen shall be equipped with a fire wall having a fire resistance rating of not less than 4.00h. The height of the fire wall shall not be lower than that of the tube trailer for gaseous hydrogen and tube skid container for gaseous hydrogen and the length of it shall not be less than 0.5 and 1.5 times the product of the sum of the number of parking spaces of tube trailers for gaseous hydrogen and tube skid containers for gaseous hydrogen and the width of the parking space for a single tube trailer and tube skid container for gaseous hydrogen;
4 The fire wall at the discharge end of tube trailer for gaseous hydrogen and tube skid container for gaseous hydrogen may be used as a part of the fence of station area.
5.0.7A The layout of the parking space for liquid hydrogen lorry truck and tank containers for liquid hydrogen used as stationary pressure vessel for storage of hydrogen shall meet the following requirements:
1 The liquid hydrogen lorry truck and tank containers for liquid hydrogen shall be arranged in the open air;
2 The fire separation distance between the fixed parking space for liquid hydrogen lorry truck and tank containers for liquid hydrogen and the facilities in the station shall be determined according to the fire separation distance of hydrogen storage vessel in Table 5.0.1A;
5.0.8 This subclause is deleted.
5.0.9 The layout of the liquid hydrogen booster pump and the pressure vessels for storage of liquid hydrogen should be determined according to the process requirements.
5.0.10 There should be no roads between the parking space for tube trailers for gaseous hydrogen and tube skid containers for gaseous hydrogen and the compressor. Safety and fire prevention measures shall be provided between the parking space for tube trailers for gaseous hydrogen and tube skid containers for gaseous hydrogen and the adjacent roads.
6 Hydrogen fuelling process and equipment
6.1 Hydrogen quality and metering
6.1.1 The quality of incoming hydrogen of hydrogen fuelling station shall meet the following requirements:
1 The quality and inspection rules of hydrogen for hydrogen fuel cell vehicles shall meet the relevant requirements of the current national standard GB/T 37244 Fuel specification for proton exchange membrane fuel cell vehicles - Hydrogen;
2 The quality and inspection rules of hydrogen for hydrogen internal-combustion engine vehicle or vehicles fueled by hydrogen-CNG mixture shall meet the relevant requirements of the current national standards GB 3634.1 Hydrogen - Part 1: Industrial hydrogen and GB/T 34537 Hydrogen and compressed natural gas (HCNG) blended as vehicle fuel.
6.1.2 The quality of outgoing hydrogen from hydrogen fuelling station shall be determined according to customer requirements and shall at least meet the following requirements:
1 The quality of hydrogen used for hydrogen fuel cell vehicle shall meet the requirements of the current national standards such as GB/T 37244 Fuel specification for proton exchange membrane fuel cell vehicles - Hydrogen;
2 The quality of hydrogen used for hydrogen internal-combustion engine vehicle or vehicles fueled by hydrogen-CNG mixture shall meet the relevant requirements of the current national standards GB 3634.1 Hydrogen - Part 1: Industrial hydrogen and GB/T 34537 Hydrogen and compressed natural gas (HCNG) blended as vehicle fuel.
6.1.3 The metering of incoming hydrogen of hydrogen fuelling station shall meet the following requirements:
1 When the tube trailers for gaseous hydrogen and tube skid containers for gaseous hydrogen are adopted for transporting hydrogen, it may be calculated according to the structure volume of hydrogen storage vessel as well as the beginning and ending pressure, temperature and compression factor;
2 When the hydrogen pipeline is adopted for transporting hydrogen, metering with mass flowmeter should be adopted;
3 When liquid hydrogen is adopted, it shall be measured based on the liquid level of pressure vessels for storage of liquid hydrogen. The liquid level should be measured with capacitive liquid level meter or by the measuring method with the same accuracy.
4 The maximum allowable error of the metering device for the incoming hydrogen of hydrogen fuelling station shall be ±1.5%.
6.1.4 The quality and metering requirements of the incoming natural gas in the mixed fuel shall meet the relevant requirements of the current national standards GB 18047 Compressed natural gas as vehicle fuel and GB 50156 Code for design and construction of filling station. The proportion of mixed fuel for vehicles fueled by hydrogen-CNG mixture shall be determined according to the engine requirements of mixed fuel vehicle.
6.1.5 When the quality of incoming hydrogen used for hydrogen fuel cell vehicle cannot reach the quality criteria of hydrogen used for fuel cell, the corresponding hydrogen purification device shall be selected according to incoming hydrogen purity or impurity content, and the hydrogen purification device should be equipped in front of hydrogen compressor.
6.1.7 The hydrogen fuelling station shall be equipped with a process control system for coordinated optimization, management, control and monitoring of the operation state of the process equipment of the hydrogen fuelling station according to actual requirements.
6.2 Hydrogen compressing process and equipment
6.2.1 The hydrogen compressing process system of hydrogen fuelling station shall be determined according to incoming hydrogen transport mode and shall meet the following requirements:
1 When the tube trailers for gaseous hydrogen and tube skid containers for gaseous hydrogen are adopted for supplying hydrogen, the hydrogen compressor used for pressure boost shall be installed in hydrogen fuelling station, and the hydrogen compressor as well as hydrogen storage vessel shall be selected according to hydrogen storage or charge parameters;
2 When the hydrogen pipeline is adopted for transporting and supplying hydrogen, the hydrogen compressor and hydrogen storage vessel shall be selected according to incoming hydrogen pressure, hydrogen storage or charge parameters;
3 When it is used for hydrogen fuel vehicle or vehicles fueled by hydrogen-CNG mixture, the hydrogen compressor and hydrogen storage vessel shall be selected according to required hydrogen parameters and storage or charge parameters.
6.2.1A The setting of liquid hydrogen booster system in hydrogen fuelling station shall meet the following requirements:
1 The type selection and quantity of liquid hydrogen booster pumps shall be determined according to the hydrogen supply pressure and flow rate. Piston pumps and the like should be adopted and standby liquid hydrogen booster pumps should be provided.
2 The vaporization capacity of vaporizer shall be determined by liquid hydrogen flow rate and boost pressure, and the heat exchange form should be of air temperature type;
3 The pressure vessels for storage of liquid hydrogen and the liquid hydrogen booster pump shall be connected flexibly, and the inner diameter of the connecting pipe shall not be smaller than the diameter of the liquid inlet of the pump, and where necessary, a certain slope shall be set according to the process requirements.
6.2.2 When self-produced hydrogen is pressurized by a compressor and then stored at high pressure, a buffer tank shall be provided before the hydrogen enters the hydrogen compressor.
6.2.3 The type and number of hydrogen compressors shall be determined according to the hydrogen supply method, pressure, hydrogen charging requirements, and working parameters of the hydrogen storage vessel. The hydrogen fuelling station should be equipped with standby hydrogen compressor.
6.2.4 This subclause is deleted.
6.2.5 The safety protection device of the hydrogen compressor shall meet the following requirements:
1 Safety valves shall be provided between the compressor inlet and outlet and the first shut-off valve;
2 High-pressure and low-pressure alarm devices and over-limit shutdown device shall be provided at the inlet and outlet of compressor;
3 The lubricating oil system shall be equipped with oil pressure (too high, too low) alarm devices or oil temperature (too high) alarm device;
4 The cooling system of compressor shall be equipped with temperature and pressure or flow rate alarm and shutdown device;
5 The pipelines at inlet and outlet of the compressor shall be provided with purging orifices (for replacement);
6 If diaphragm compressor is used, a diaphragm rupture alarm and shutdown device shall be provided;
7 If belts are used for driving, anti-static measures shall be taken.
6.2.6 This subclause is deleted.
6.2.8 The operation and management of hydrogen compressor should be controlled by a programmable logic control device (PLC).
6.2.9 The arrangement of hydrogen compressors shall meet the following requirements:
1 The hydrogen compressors installed in the compressor room should be arranged in a single row, and the width of the main passage shall not be less than 1.50m, and the distance between the compressors and the wall shall not be less than 1.00m;
2 If portable hydrogen compressor is used, safety facilities such as natural exhaust device, hydrogen concentration alarm device, accident exhaust device and its interlocking device shall be installed in non-open cabinet;
3 The control panel and instrument control panel of the hydrogen compressor should be installed in a dedicated control cabinet or an adjacent control room.
6.3 Hydrogen storage system and equipment
6.3.1 The working pressure of hydrogen storage system in the hydrogen fuelling station shall be determined based on the hydrogen charging pressure of the vehicle-mounted hydrogen storage bottle. If the hydrogen charging pressure is 35MPa, the working pressure of hydrogen storage system in the hydrogen fuelling station should not be greater than 45MPa; if the hydrogen charging pressure is 70MPa, the working pressure of hydrogen storage system in the hydrogen fuelling station should not be greater than 90MPa.
6.3.2 If hydrogen is stored in the hydrogen fuelling station, it should be stored at high pressure or stored in liquid. If other storage methods are adopted, they shall be adopted after technical and economic demonstration. The hydrogen storage facilities in the hydrogen fuelling station should be dedicated stationary pressure vessels for storage of hydrogen.
6.3.2A The stationary pressure vessel for storage of hydrogen shall meet the requirements of pressure, temperature, hydrogen storage capacity, service life and service environment, and have sufficient safety margin to meet the requirements for safe use.
6.3.2B The stationary pressure vessel for storage of hydrogen shall be equipped with an operating parameter recording device, and the pressure, temperature and number of times when the pressure fluctuation exceeds 20% of the design pressure shall be monitored in real time and recorded automatically. The recording device shall keep all the above records intact and for a long time.
6.3.2C The using unit of stationary pressure vessel for storage of hydrogen shall only use those that have been awarded with the production permit and passed the inspection, and shall formulate operation procedures and establish relevant safety production management systems.
6.3.2D The use and management of pressure vessels for storage of gaseous hydrogen shall comply with the relevant provisions of the current national standard GB/T 34583 Safety technical requirements for hydrogen storage devices used in hydrogen fuelling station.
6.3.3 For pressure vessels for storage of gaseous hydrogen in the hydrogen fuelling station, their pressures should be set by levels (level 2 to 3), and the capacity for each level shall be determined based on the hydrogen storage pressure, hydrogen charging pressure and hydrogen charging volume of that level.
6.3.3A If hydrogen storage vessels with different design pressures are used, pressure control measures shall be taken to prevent those with lower design pressures from overpressure.
6.3.4 This subclause is deleted.
6.3.5 For the safety facilities of pressure vessels for storage of gaseous hydrogen, their arrangement shall meet the following requirements:
1 A safety valve shall be installed, and its set pressure shall not exceed the design pressure of the vessel;
2 The vessel shall be equipped with a hydrogen vent pipe, and the vent pipe shall be equipped with 2 shut-off valves and sampling ports;
3 The pressure measuring instrument and pressure sensor shall be installed;
4 A hydrogen leakage warning device with recording function and a video monitoring device shall be installed;
5 Nitrogen purging and replacement interface shall be provided, and the purity of nitrogen shall not be lower than 99.2%.
6.3.5A The pressure vessel for storage of liquid hydrogen shall be a high vacuum multilayer insulated vessel, and shall meet relevant technical requirements.
6.3.5B The inner container and vacuum interlayer of the pressure vessels for storage of liquid hydrogen shall be equipped with safety relief devices, and the overpressure hazard caused by the rapid phase change of liquid hydrogen into hydrogen shall be considered during design of the relieving capacity.
6.3.5C The outlet pipe of the pressure vessel for storage of liquid hydrogen should be led out from the bottom of the inner container, and a shut-off valve shall be installed on the liquid hydrogen pipeline.
6.3.5D If the pressure vessel for storage of liquid hydrogen is newly used or contaminated, the inner container shall be purged or the gas in it shall be replaced before it is charged with liquid hydrogen. In case of replacement, positive pressure replacement should be adopted, and the following requirements shall be met:
1 After the air tightness test, nitrogen with a purity of not less than 99% and a dew point of not higher than -53℃ shall be charged into the inner container until its pressure reaches 0.15MPa, and then keep it for 5min, after that, discharge the nitrogen so that the pressure can be reduced to 0.01MPa. Repeat this procedure until the oxygen content in the inner container is not more than 0.5%;
2 Following the above method, charge and discharge the inner container with hydrogen (with a purity of not less than 99.99% ) repeatedly until the content of residual gas impurity in the container meets the requirements of Table 6.3.5D;
3 After the replacement, the hydrogen pressure in the container should be kept at 0.15MPa until liquid hydrogen is charged.
Table 6.3.5D Replacement index for pressure vessels for storage of liquid hydrogen
Item Nitrogen (N2) content Content of oxygen and argon (O2+Ar) Water (H2O) content
Index
(ppm) ≤100 ≤20 ≤20 or dew point at atmospheric pressure ≤-55℃
6.3.5E The charging ratio of pressure vessels for storage of liquid hydrogen shall not be greater than 90%.
6.3.6 Cylinder assemblies for storage of gaseous hydrogen shall be secured on independent support horizontally. The clear distance between vessels of the same group should not be less than 0.03m, and the distance between cylinder assemblies for storage of gaseous hydrogen should not be less than 1.50m.
6.3.6A The base or support of hydrogen storage vessel shall be made of non-combustible materials and shall meet the requirements for strength.
6.3.7 This subclause is deleted.
6.3.8 If the hydrogen storage vessel is adjacent to the car passage in the station, safety fences shall be provided or other anti-collision measures shall be taken on the adjacent side.
6.3.8A Hydrogen storage vessel and hydrogen compressor shall be provided with guardrails to isolate them from public areas. The height of the guardrails should not be less than 2m. The guardrails should be made of metallic materials, and their design, manufacture, installation, acceptance and maintenance shall comply with the relevant provisions of the current professional standard JGJ/T 470 Technical standard for building protective railings.
6.3.10 When the hydrogen is pressurized and then charged into the pressure vessel for storage of gaseous hydrogen with a compressor, the relieving capacity of the safety relief device of the pressure vessel for storage of gaseous hydrogen shall not be less than the maximum discharge volume of the compressor.
6.3.11 The tube trailers for gaseous hydrogen and tube skid containers for gaseous hydrogen in the hydrogen fuelling station shall comply with the relevant provisions of the current professional standards NB/T 10354 Tube trailer and NB/T 10355 Tube skid container.
6.4 Hydrogen dispenser
6.4.2 The number of hydrogen dispensers shall be determined based on the number of hydrogen energy vehicles to be hydrogenated, amount of hydrogen to be charged for each vehicle, volume of the hydrogen storage vessel, and discharge volume of the hydrogen compressor. The performance of the hydrogen dispenser shall comply with the relevant provisions of the current national standard GB/T 31138 Compressed hydrogen dispenser for vehicles. Whether the hydrogen dispenser has active flow regulation function or mode shall be indicated.
6.4.2A When the vehicle-mounted hydrogen storage bottle is charged with hydrogen with the hydrogen dispenser, the following requirements shall be met:
1 The hydrogen should not be charged into the vehicle-mounted hydrogen storage bottle directly from the hydrogen compression system;
2 Ensure that the vehicle-mounted hydrogen storage bottle is free from overtemperature or overpressure;
3 Buffer devices shall be provided when liquid hydrogen is charged.
6.4.3 The hydrogen dispenser shall be provided with charging, metering and control functions, and shall meet the following requirements:
1 The pressure grade of hydrogen dispenser shall meet the requirements of Table 6.4.3.
Table 6.4.3 Pressure grade of hydrogen dispenser
Hydrogen service level (HSL) of hydrogen dispenser Nominal working pressure (NWP) (MPa) Maximum working pressure (MPa) Maximum allowable working pressure (MPa)
H35 35 43.8 48.1
H50 50 62.5 68.8
H70 70 87.5 96.3
2 The hydrogen charging flow rate of the hydrogen dispenser shall not be greater than 7.2kg/min, and the state of charge should be 95% ~ 100% when the charging is finished.
3 The hydrogen dispenser shall be equipped with overpressure relief device, or relevant safety measures shall be taken, and the set pressure of the safety valve shall not be greater than 1.375 times of the nominal working pressure.
4 When the amount of hydrogen charged by the hydrogen dispenser is metered, a mass flow meter should be used, and it shall be with a minimum division value of not greater than 10g.
5 The hydrogen dispenser shall be installed with automatic control device matched with the hydrogen fueling system.
6 Automatic shut-off valves shall be installed on air intake pipeline of hydrogen dispenser.
7 Manual selection and intervention should be reduced except for basic operations such as start, stop, and emergency stop.
8 At the end of hydrogen charging, the temperature and pressure in the vehicle-mounted hydrogen storage bottle shall not exceed 85℃ and 1.25 times the nominal working pressure respectively.
9 When the hydrogen dispenser is started, the initial pressure of the on-board hydrogen system shall be measured. If the initial pressure of the system is less than 2.0MPa or greater than the nominal working pressure, the charging shall be stopped immediately.
10 The hydrogen charging process control shall meet relevant technical requirements for charging;
11 For hydrogen dispenser that may perform charging for multiple channels at the same time, the control system of each channel shall be arranged independently.
6.4.5 The dispenser hose of the hydrogen dispenser shall be equipped with a breaking valve.
6.4.6 The dispenser hose, breaking valve on it, and the hose coupler shall meet the following requirements:
1 After the breaking valve is separated under external force, both ends shall be sealed automatically;
2 Dispenser hose and hose coupler shall be made of corrosion-resistant materials.

1 General Provisions
2 Terms
3 Basic Requirement
4 Location
5 General Layout Plan Equipment
6 Hydrogen Fuelling Process and Equipment
6.1 Hydrogen Quality and Metering
6.2 Hydrogen Compressing Process and Equipment
6.3 Hydrogen Storage System and Equipment
6.4 Hydrogen Dispenser
6.5 Hydrogen Pipelines and Accessories
7 Fire Protection and Safety Facilities
7.1 Fire Protection Facilities
7.2 Safety Facilities for Hydrogen Fuelling Process System
7.3 Alarm Devices
8 Building Equipment
9 Water Supply and Drainage
10 Electrical Devices
10.1 Power Supply and Distribution
10.2 Lightning Protection and Grounding System
10.3 Electrostatic Prevention
11 Heating and Ventilation
12 Construction, Installation and Approval
12.1 General Requirement
12.2 Installation of Equipment
12.3 Installation of Pipeline
12.4 Installation of Electrical Instruments
12.5 Construction Approval
13 Requirements for Hydrogen System Operation and Management
Appendix A Zones of Rating for Explosion Danger in Hydrogen Fuelling Station
Appendix B Classification of Civil Buildings Protection
Explanation of Wording in this Code
List of Quoted Standards