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GB 50516-2021: [2021 Edition of GB 50516-2010] Technical code for hydrogen fuelling station
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GB 50516-2010
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
UDC
P GB 50516-2010
Technical Code for Hydrogen Fuelling Station
(Version 2021)
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 
5 General Layout
5.0.1 Deleted.
5.0.1A The fire separation between the facilities in the hydrogen fuelling station shall not
be less than the values as specified in Table 5.0.1A.
5.0.2 The fence setting of the hydrogen fuelling station shall comply with the following
requirements:
1. If the distance between the process facilities of the hydrogen fuelling AND the
outside buildings and structures is less than or equal to 1.5 times the fire
separation of Table 4.0.4A of this Code, and less than or equal to 25 m, it shall
build a noncombustible solid fence having a height not less than 2.5 m in between
them;
2. If the distance between the process facilities of the hydrogen fuelling and the outside
buildings and structures is more than 1.5 times the fire separation of Table 4.0.4A of
this Code, and more than 25 m, it may build a non-solid fence in between them;
3. It is preferable to open or partially build non-solid fence at the side facing the
incoming and outgoing roads.
5.0.3 The vehicle entrance and outlet of the hydrogen fuelling station shall be set
separately.
5.0.4 The road setting in the hydrogen fuelling station area shall comply with the following
requirements:
1. The single lane width shall not be less than 3.5 m, and the double lane width shall not
be less than 6 m;
2. The turning radius of the road in the station shall be determined by the automobile
types and it is not preferable to be less than 9 m, and the road slope shall be not more
than 6%. It may not set slope at the vehicle parking space.
3. There shall be complete and continuous personnel passages among various areas in the
station, and the width of the passages should not be less than 1.5 m.
5.0.5 The hydrogen fuelling island shall be higher above the terrace of the parking lot, it is
preferable to be 0.15 m ~ 0.20 m, and its width shall not be less than 1.20 m.
5.0.6 Deleted.
5.0.7 The tube trailers for gaseous hydrogen and tube skid container for gaseous hydrogen in
the hydrogen fuelling station shall be arranged in accordance with the following provisions:
1. It shall be equipped with a fixed parking space for tube trailers for gaseous hydrogen
and tube skid container for gaseous hydrogen, the number of which shall be
determined based on such factors as the scale of hydrogen fuelling station, the
hydrogen production capacity of hydrogen production equipment in the station, the
specifications of the tube trailers for gaseous hydrogen and tube skid container for
gaseous hydrogen, and turnaround time, etc.;
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.
6.2.2 When the self-produced hydrogen is subjected to high pressure storage by the
compressor after boosting, it shall provide the buffer tank upstream the compressor.
6.2.3 The type selection and number of hydrogen compressors shall be determined based on
hydrogen supply method, pressure, hydrogen fuelling requirements, and hydrogen storage
vessel’s operating parameters and other factors. The hydrogen fuelling station should be
equipped with a spare hydrogen compressor.
6.2.4 Deleted.
6.2.5 The safety protection device of the hydrogen compressor shall be set in accordance with
the following provisions:
1. It shall install the safety valve between the inlet and outlet of the compressor and
the first cutoff valve;
2. It shall install the high pressure and low pressure alarming and overrun shutdown
device at the inlet and outlet of the compressor;
3. It shall install the high oil pressure, low oil pressure or high oil temperature
alarming device for the lubricant system, and it shall install the high oil pressure
and low oil pressure alarming device for the diaphragm compressor;
4. It shall install the temperature and pressure or flow rate alarming and shutdown
device for the cooling water system of the compressor;
5. It shall install the replacement purging nozzle for the inlet and outlet pipeline of
the compressor;
6. When using diaphragm compressors, it shall install the diaphragm breakage and
shutdown device;
7. When using belt drive, anti-static measures shall be taken.
6.2.6 Deleted.
6.2.7 The condensate which is drained from different levels of coolers, gas-water
separators, and hydrogen pipeline of the hydrogen compressor shall all be collected by
the special purpose drainage device and delivered into the condensate drainage device,
and then drained outdoor.
6.2.8 Hydrogen compressor operation and management should be controlled through a
programmable controller (PLC).
6.2.9 The layout of the hydrogen compressor shall comply with the following requirements:
1. It is preferable for the hydrogen compressor in the compressor room to be arranged in
one row, with the main channel width of not less than 1.50 m and the distance to the
wall of not less than 1.00 m;
2. When using the portable hydrogen compressor, it shall provide such safety
facilities as natural exhaust, hydrogen concentration alarming, accident exhaust
and its interlocking device in the un-opened cabinet;
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 requirement...