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GB 50516-2021 English PDF (GB50516-2021)

GB 50516-2021 English PDF (GB50516-2021)

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GB 50516-2021: [2021 Edition of GB 50516-2010] Technical code for hydrogen fuelling station

GB 50516-2010 (2021 Edition)
NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA
Technical Code for Hydrogen Fuelling Station
ISSUED ON: MAY 31, 2010
IMPLEMENTED ON: DECEMBER 1, 2010
Issued by: Ministry of Housing and Urban-Rural Development of the People's Republic of China;
State Administration for Market Regulation
Table of contents
Technical Code for Hydrogen Fuelling Station ... 10
1 General Provisions ... 10
2 Terms ... 11
3 Basic Requirements ... 14
4 Location ... 16
5 General Layout ... 18
6 Hydrogen Fuelling Process and Equipment ... 23
6.1 Hydrogen Quality and Metering ... 23
6.2 Hydrogen Compressing Process and Equipment ... 24
6.3 Hydrogen Storage System and Equipment ... 26
6.4 Hydrogen Dispenser ... 28
6.5 Hydrogen Pipelines and Accessories ... 30
6.6 Materials in Contact with Hydrogen ... 32
7 Fire Protection and Safety Facilities ... 34
7.1 Fire Protection Facilities ... 34
7.2 Safety Facilities for Hydrogen Fuelling Process System ... 34
7.3 Alarm Device ... 35
8 Architectural ... 37
9 Water Supply and Drainage ... 39
10 Electrical Installations ... 40
10.1 Power Supply and Distribution ... 40
10.2 Lightning and Grounding ... 40
10.3 Protection of Electrostatic Discharge ... 41
11 Heating and Ventilation ... 43
12 Construction, Installation and Approval ... 44
12.1 General Requirement ... 44
12.2 Installation of Equipment ... 44
12.3 Installation of Pipeline ... 47
12.4 Installation of Electrical Instruments ... 49
12.5 Construction Approval ... 51
13 Requirements for Hydrogen System Operation and Management ... 54
Appendix A Zones of Rating for Explosion Danger in Hydrogen Fuelling Station ... 56 Appendix B ... 59
Deleted ... 59
Explanation of Wording in This Code ... 60
List of Quoted Standards ... 61
2 Terms
2.0.1 Hydrogen fuelling station
It refers to a specific place wherein the hydrogen cylinders of the hydrogen fuel cell vehicle or hydrogen internal combustion engine automobile or hydrogen gas mixture fuel automobile are charged with hydrogen fuel.
2.0.2 The system of hydrogen produced on site
It refers to the hydrogen production system installed in the hydrogen fuelling station, which is usually a general name of hydrogen production, purification, compression and supporting facilities.
2.0.3 Deleted.
2.0.4 Deleted.
2.0.5 Station house
It refers to the building which is used for the management and operation of the hydrogen fuelling station.
2.0.6 Hydrogen fuelling island
It refers to the platform wherein the hydrogen fuelling machine OR the hydrogen and gas mixture dispenser is installed.
2.0.7 Deleted.
2.0.8 Hydrogen dispenser
It refers to the special purpose equipment which charges hydrogen to the hydrogen cylinder (tank) of the means of transportation, and is equipped with the functions of controlling, metering and pricing.
2.0.9 Deleted.
2.0.9A Stationary pressure vessels for storage of hydrogen
It refers to pressure vessels in fixed installation for the storage of hydrogen fuel, which include pressure vessels for gaseous hydrogen storage, liquid hydrogen storage and metal hydride storage. They are abbreviated as hydrogen storage vessels.
2.0.10 Pressure vessels for storage of gaseous hydrogen
It refers to pressure vessels for the storage of gaseous hydrogen, which include necessary safety accessories, pressure detection and display instruments, etc.
2.0.11 Cylinder assemblies for storage of gaseous hydrogen
It refers to a hydrogen storage facility which assembles several cylinder assemblies for storage of gaseous hydrogen into an integral, which includes the corresponding connecting pipes, valves and safety accessories and so on.
2.0.11A Pressure vessels for storage of liquid hydrogen
It refers to pressure vessels for the storage of liquid hydrogen, which includes adiabatic systems, necessary safety devices, pressure and liquid level display instruments, etc. 2.0.11B Pressure vessels for storage of metal hydride
It refers to hydrogen storage pressure vessels containing reversible metal hydride, which include heat exchange system, necessary safety accessories, pressure detection and display instruments, etc.
2.0.11C Liquid hydrogen booster pump
It refers to an equipment of raising the pressure of liquid hydrogen to satisfy the pressure required by the hydrogen dispenser.
2.0.12 Deleted.
2.0.13 Deleted.
2.0.14 Portable hydrogen compressor unit
It refers to the hydrogen compressor provided on one or more movable or transportable bases (discs) as well as its auxiliary equipment, electrical device, and connection pipelines, etc. 2.0.15 Vent unit
It refers to the special purpose vent device which is used to collect the hydrogen or hydrogen and gas mixture fuel as vented from the equipment and pipeline system of the hydrogen fuelling station.
2.0.16 Condensate drain unit
It refers to the special purpose device which is used to collect the condensate as drained from the equipment and pipeline system of the hydrogen fuelling station.
2.0.17 Break away coupling
It refers to the valve which can be separated into two sections under the effect of external force and which has the self-sealing function after separation.
2.0.18 Tube trailers for gaseous hydrogen
It refers to road transport vehicles consisting of a hydrogen storage cylinder permanently connected to a semi-trailer running mechanism or a shaped chassis through a supporting end plate or a frame.
2.0.18A Tube skid container for gaseous hydrogen
It refers to a mobile pressure vessel for shipping compressed hydrogen, which consists of a single hydrogen storage cylinder with a nominal water volume of 1,000 L ~ 4,200 L, which is permanently connected to the frame through the support end plate, and is composed of pipelines, safety accessories, instruments, loading and unloading accessories, etc. 2.0.19 Liquid hydrogen lorry truck
6 Hydrogen Fuelling Process and Equipment
6.1 Hydrogen Quality and Metering
6.1.1 The quality of the incoming hydrogen shall comply with the following stipulations: 1. The quality and inspection rules of hydrogen used for the hydrogen fuel cell vehicles shall comply with the stipulations of the current national standard “Fuel Specification for Proton Exchange Membrane Fuel Cell Vehicles - Hydrogen” GB/T 37244; 2. The quality and inspection rules of hydrogen used for hydrogen internal combustion engine vehicles or hydrogen and natural gas hybrid fuel vehicles shall comply with the relevant stipulations of the current national standard “Hydrogen - Part 1: Industrial Hydrogen” GB 3634.1 and “Hydrogen and Compressed Natural Gas (HCNG)
Blended as Vehicle Fuel” GB/T 34537.
6.1.2 The quality of the outgoing hydrogen of the hydrogen fuelling station shall be determined in accordance with the user's requirements and shall be not lower than the following requirements:
1. The quality of the hydrogen which is used for the hydrogen fuel cell vehicles and so on shall comply with the stipulations of the current national standard “Fuel Specification for Proton Exchange Membrane Fuel Cell Vehicles - Hydrogen” GB/T 37244;
2. The quality of the hydrogen which is used for the hydrogen internal combustion vehicles or hydrogen and natural gas hybrid fuel vehicles shall comply with the relevant stipulations of the current national standard “Hydrogen - Part 1: Industrial Hydrogen” GB 3634.1 and “Hydrogen and Compressed Natural Gas (HCNG)
Blended as Vehicle Fuel” GB/T 34537.
6.1.3 The metering of incoming hydrogen of the hydrogen fuelling station shall comply with the following requirements:
1. When the tube trailers for gaseous hydrogen and tube skid container for gaseous hydrogen are used to transport hydrogen, the calculation may be performed in accordance with the structure and volume of the hydrogen storage cylinder, as well as the starting and ending pressure, temperature and compression factor;
2. When the hydrogen pipeline is used to transport hydrogen, it is preferable to use the mass flow meter for metering purposes;
3. When liquid hydrogen is used, the liquid level of the liquid hydrogen storage pressure vessel shall be taken for metering; the liquid level measurement should adopt a capacitive liquid level gauge or a measurement method with the same accuracy; 4. The maximum allowable error of the metering device of incoming hydrogen of the hydrogen fuelling station shall be  1.5%.
6.1.4 The quality and metering requirements for the incoming natural gas in the mixed fuel shall comply with the relevant stipulations of the current national standard “Compressed natural Gas as Vehicle Fuel” GB 18047 and “Code for Design and Construction of Automobile Gasoline and Gas Filling Station” GB 50156. The fuel mixture proportion of the hydrogen natural gas mixture vehicle shall be determined in accordance with the requirements of the mixture fuel vehicle engine.
6.1.5 As for the hydrogen used for the hydrogen fuel cell vehicles, if the quality of the incoming hydrogen cannot reach to the quality criteria of the hydrogen for fuel cell, it shall select the corresponding hydrogen purification device based on the purity or impurity content of the incoming hydrogen, and it is preferable for the hydrogen purification device to be in front of the hydrogen compressor.
6.1.6 Such procedures as purification, compression, metering, mixing, transportation, and storage, etc., in the hydrogenation process system shall be equipped with the pressure detection points, and it shall also be equipped with the over-pressure or low pressure alarm device in accordance with the safety operation requirements.
6.1.7 The hydrogen fuelling station shall set up a process control system. The operation status of the process equipment of the hydrogen fuelling station should be collaboratively optimized, managed, controlled and monitored in accordance with the actual demands. 6.2 Hydrogen Compressing Process and Equipment
6.2.1 The hydrogen compression process system of the hydrogen fuelling station shall be determined in accordance with the incoming hydrogen delivery method, and meanwhile comply with the following provisions:
1. When using the tube trailers for gaseous hydrogen and tube skid container for gaseous hydrogen to supply hydrogen, it shall provide the pressure boost hydrogen compressor in the hydrogen fuelling station, and shall select the hydrogen compressor and the hydrogen storage vessel based on the hydrogen storage or fuelling parameters; 2. When using the hydrogen pipeline to transport hydrogen, it shall select the hydrogen compressor and the hydrogen storage vessel based on the incoming hydrogen pressure, hydrogen storage or fuelling parameters;
3. When it is used for hydrogen fuel vehicles or hydrogen and natural gas hybrid fuel vehicles, it shall select the hydrogen compressor and the hydrogen storage vessel based on the parameters of the required hydrogen and the storage or fuelling parameters.
6.2.1A The setting of the liquid hydrogen booster pump of the hydrogen fuelling station shall comply with the following stipulations:
1. The type selection and number of the liquid hydrogen booster pumps shall be determined in accordance with the hydrogen supply pressure and flow rate; it should be in the form of a piston pump, and a backup liquid hydrogen booster pump should be set up;
2. The vaporization capacity of the vaporizer shall be determined by the liquid hydrogen flow and boost pressure, and the heat exchange form should be air temperature type; 3. A flexible connection shall be adopted between the liquid hydrogen storage pressure vessel and the liquid hydrogen booster pump. The inner diameter of the pipeline should not be smaller than the diameter of the liquid inlet of the pump. If necessary, a certain slope shall be set in accordance with the process requirements. 3. It is preferable for the control panel and instrument control panel for the hydrogen compressor to be located in a special-purpose control cabinet or an adjacent control room.
6.3 Hydrogen Storage System and Equipment
6.3.1 The working pressure of the hydrogen storage system in the hydrogen fuelling station shall be determined in accordance with the hydrogen charging pressure of the on-board hydrogen storage cylinder. When the hydrogen charging pressure is 35 MPa, the working pressure of the hydrogen storage system in the hydrogen fuelling station should not be greater than 45 MPa; when the hydrogen charging pressure is 70 MPa, the working pressure of the hydrogen storage system of the hydrogen fuelling station should not be greater than 90 MPa. 6.3.2 The mode of high-pressure hydrogen storage or liquid hydrogen storage should be adopted for hydrogen storage in the hydrogen fuelling station, and other hydrogen storage modes shall be adopted after technical and economic demonstration. The hydrogen storage facility in the hydrogen fuelling station should select a special-purpose fixed hydrogen storage pressure vessel.
6.3.2A The fixed hydrogen storage pressure vessel shall satisfy the requirements of pressure, temperature, hydrogen storage capacity, service life and environment of application, etc., and have sufficient safety margin to satisfy the requirements of safe application. 6.3.2B The stationary hydrogen storage pressure vessel shall be equipped with an operating parameter recording device, and shall conduct real-time monitoring and automatic recording of the number of pressure fluctuations, in which, the range of pressure, temperature and pressure fluctuation exceeds 20% of the design pressure. The recording device shall satisfy the requirement of keeping all the above-mentioned records intact in the long term. 6.3.2C The organizations using the stationary hydrogen storage pressure vessels shall use stationary hydrogen storage pressure vessels that have obtained production licenses and have passed the inspection. In addition, they shall also formulate operating procedures and establish corresponding safety production management systems.
6.3.2D The application management of the hydrogen storage pressure vessels shall comply with the relevant stipulations of the current national standard “Safety Technical Requirements for Hydrogen Storage Devices Used in Hydrogen Fuelling Station” GB/T 34583. 6.3.3 As for the hydrogen storage pressure vessels in the hydrogen fuelling station, it is preferable to set the pressure based on level 2 ~ level 3 respectively, and the volume of each level shall be determined based on such factors as the storage pressure of each level, hydrogen charging pressure, and charging hydrogen amount.
6.3.3A When hydrogen storage vessels with different design pressures are used to store hydrogen, pressure control measures shall be taken, and hydrogen storage vessels with a relatively low design pressure shall be prevented from overpressure.
6.3.4 Deleted.
6.3.5 The installation of the safety facilities for the hydrogen storage pressure vessels shall comply with the following requirements:
1. A safety valve shall be installed, and the set pressure must not exceed the design pressure of the vessel;
6.3.6 The cylinder assemblies for storage of gaseous hydrogen shall be fixed onto an independent stand and it is preferable to use the horizontal manner. It is not preferable for the net spacing between the same assembly of containers to be less than 0.03 m, and it is not preferable for the distance between the cylinder assemblies for storage of gaseous hydrogen to be less than 1.50 m.
6.3.6A The base or bracket of the hydrogen storage vessel shall be made of non-combustible materials and shall satisfy the strength requirements.
6.3.7 Deleted.
6.3.8 When the hydrogen storage vessel is adjacent to the vehicle passage in the station, it shall provide the safety guard rail or other anti-collision measures in between them. 6.3.8A The hydrogen storage vessel and hydrogen compressor shall be separated from public areas through guardrails. The height of the guardrails should not be less than 2 m. The guardrails should be made of metal materials. The requirements for the design, manufacture, installation and construction, engineering acceptance inspection and maintenance shall comply with the relevant stipulations of the current industrial standard “Technical Standard for Building Guardrail” JGJ/T 470.
6.3.9 Hydrogen storage capacity of hydrogen fuelling station shall comply with the requirements of hydrogen supply method, hydrogen supply pressure, hydrogen storage pressure, pressure level and hydrogen fuelling capacity, hydrogen charging pressure, and balanced continuous hydrogen supply.
6.3.10 When using a compressor to pressurize hydrogen and fuel it into a hydrogen storage pressure vessel, the discharge volume of the safety relief device of the hydrogen storage pressure vessel shall not be less than the maximum displacement of the compressor. 6.3.11 The tube trailers for gaseous hydrogen and the tube skid container for gaseous hydrogen shall comply with the relevant stipulations of the current industrial standard “Tube Trailer” NB/T 10354 and “Tube Skid Container” NB/T 10355.
6.4 Hydrogen Dispenser
6.4.1 Hydrogen dispenser shall not be located indoors.
6.4.2 The number of hydrogen dispensers shall be determined in accordance with the number of hydrogen energy vehicles to be hydrogenated, the amount of hydrogen required for each vehicle, the volume of the hydrogen storage vessel and the displacement of the hydrogen compressor. The performance of the hydrogen dispenser shall comply with the relevant stipulations of the current national standard “Compressed Hydrogen Dispenser for Vehicles” GB/T 31138. The hydrogen dispenser shall mark whether it is equipped with the function or mode of active flow adjustment.
6.4.2A When the hydrogen dispenser fuels hydrogen into the on-board hydrogen storage cylinder, it shall comply with the following stipulations:
1. The hydrogen compression system should not directly fuel hydrogen into the on-board hydrogen storage cylinder;
2. It shall be ensured that the on-board hydrogen storage cylinder is not over-temperature or over-pressure;
6.5.2A The hydrogen pipeline shall be equipped with a safety valve suitable for high-pressure hydrogen medium, and the set pressure of the safety valve shall not be greater than the design pressure of the hydrogen pipeline.
6.5.3 It is preferable for the hydrogen pipeline to be connected through welded or ferruled fittings qualified for hydrogen compatibility; the hydrogen pipeline and the equipment and valve may adopt flange connection or thread connection, etc. and at the thread connections, it shall use the PTFE film as filler.
6.5.3A The hydrogen pipeline system shall be flexible enough to reduce stress concentration and ensure the safety of the pipeline when the temperature changes cause thermal expansion and contraction.
6.5.3B The liquid hydrogen pipeline shall comply with the following stipulations: 1. The pipeline insulation shall adopt high-vacuum multilayer insulation or other forms of insulation that satisfy the requirements of thermal insulation performance; 2. The liquid hydrogen pipeline shall be provided with a temperature compensation structure that complies with the requirements of flexible pipeline design; 3. The liquid hydrogen pipeline should be connected by welding; the liquid hydrogen pipeline and the equipment or the pipeline at the dismantling part can be connected by a flat...

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