GB/T 31138-2022 (GB/T31138-2022, GBT 31138-2022, GBT31138-2022) & related versions
GB/T 31138-2022: PDF in English (GBT 31138-2022)
GB/T 31138-2014
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.180
F 19
Compressed hydrogen dispenser for vehicles
ISSUED ON: SEPTEMBER 03, 2014
IMPLEMENTED ON: JANUARY 01, 2015
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Models ... 5
5 System composition ... 6
6 Technical requirements ... 6
6.1 Basic requirements ... 6
6.2 Functional requirements ... 7
6.3 Safety requirements ... 9
7 Test methods ... 11
7.1 Test conditions ... 11
7.2 Test items ... 11
7.3 Test of whole dispenser ... 12
8 Inspection rules ... 17
8.1 Exit-factory inspection ... 17
8.2 Type inspection ... 17
8.3 Decision rules ... 18
9 Marking, packaging, transportation and storage ... 18
9.1 Marking ... 18
9.2 Packaging ... 18
9.3 Transportation and storage ... 19
Appendix A (Informative) Hydrogen dispenser system and block diagram of
working principle ... 20
Compressed hydrogen dispenser for vehicles
1 Scope
This standard specifies the technical requirements, test methods, inspection
rules, marking, packaging, transportation and storage of compressed hydrogen
dispenser for vehicles.
This standard is applicable to compressed hydrogen dispensers which have a
rated working pressure of not more than 70 MPa for hydrogen refueling stations
of hydrogen energy vehicle.
2 Normative references
The following documents are indispensable for the application of this document.
For dated references, only the dated version applies to this document. For
undated references, the latest edition (including all amendments) applies to this
document.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 2423.1 Environmental testing for electric and electronic and electronic
products - Part 2: Test methods - Tests A: Cold
GB/T 2423.2 Environmental testing for electric and electronic products - Part
2: Test methods - Tests B: Dry heat
GB/T 2423.4 Environmental testing for electric and electronic products - Part
2: Test method - Test Db: Damp heat, cyclic (12h + 12h cycle)
GB 3836 (all parts) Electrical apparatus for explosive gas atmospheres
GB 10543 Rubber hose and hose assemblies for aircraft ground fueling and
defueling
GB/T 13384 General specifications for packing of mechanical and electrical
product
GB/T 19237 Compressed natural gas dispenser for vehicle
GB/T 24499 Technology glossary for gaseous hydrogen, hydrogen energy
and hydrogen energy system
misalignment. Exposed parts and decorative parts shall not have defects
such as damage, peeling, rust;
c) The movement of each sliding and rotating part shall be light, flexible,
stable, without blockage;
d) Fasteners shall be securely connected and not loose. The connecting
conductors shall be crimped or soldered well. The grounding wire of each
electrical equipment casing and the grounding wire of the whole dispenser
shall be well connected and firm. The connector shall be in good contact,
it shall have an interconnect structure that prevents mis-insertion and has
anti-lifting measures;
e) The components and devices that directly affect metering accuracy shall
have reliable seals or other locking devices;
f) There shall be a display for the user to view, to display the hydrogen filling
amount, filling price, unit price, etc. The display shall have complete and
clear character.
6.2 Functional requirements
6.2.1 Metering accuracy
The hydrogen dispenser shall be metered by mass flow meter, which has a
minimum division value of 10 g. The maximum indication error of the hydrogen
dispenser shall not exceed ± 2.5%.
6.2.2 Repeatability
The metering repeatability of the hydrogen dispenser shall not exceed 1%.
6.2.3 Metering unit and count indication range
6.2.3.1 The metering unit of the hydrogen dispenser is set as follows:
a) Hydrogen filling amount: kg;
b) Amount: Yuan;
c) Unit price: yuan/kg.
6.2.3.2 The count indication range of the hydrogen dispenser is set as follows:
The count indication range shall meet the following requirements:
a) Single counting range: 0.00 kg ~ 999.99 kg or 0.00 ~ 9999.99 yuan;
pressure for 10 minutes. It shall not have permanent deformation and cracking.
6.2.10 Electromagnetic compatibility
The electromagnetic compatibility of the hydrogen dispenser shall comply with
the relevant provisions of GB/T 19237.
6.2.11 Power-down protection and re-display
When the hydrogen dispenser interrupts the refueling during the refueling
process due to power failure, it shall completely retain all data and redisplay it
after the power supply is restored.
6.3 Safety requirements
6.3.1 It shall install the safety valve on the filling pipe of the hydrogen dispenser.
The opening pressure of the safety valve shall be set to 1.05 ~ 1.1 times of the
maximum working pressure of the hydrogen dispenser, meanwhile it shall not
be greater than the design pressure. When an overpressure condition occurs,
the hydrogen dispenser shall be able to automatically discharge hydrogen for
pressure relief.
6.3.2 The flow rate of hydrogen dispenser’s hydrogen injection shall not exceed
60 g/s.
6.3.3 The hydrogen dispenser which has a rated working pressure of 70 MPa
shall be provided with a communication interface that can be connected to the
vehicle in accordance with the corresponding standard, so as to input the
temperature and pressure signals of the vehicle’s cylinder into the hydrogen
dispenser during the filling process. If the communication is interrupted or there
is an over-temperature or over-pressure condition, the hydrogen injection shall
be stopped automatically.
6.3.4 A hydrogen dispenser which has a rated working pressure of 70 MPa shall
be provided with a pre-cooling system in the hydrogen supply system, to cool
the hydrogen to a predetermined temperature and then fill it into the vehicle’s
cylinder. The pre-cooling temperature range is -40 °C ~ 0 °C.
6.3.5 The hydrogen dispenser shall be equipped with an emergency stop button.
When the button is pressed in an emergency, it shall be able to close the valve
to stop gas filling; meanwhile issue a shutdown signal to the control system in
the hydrogen refueling station.
6.3.6 In the hydrogen accumulating place inside the hydrogen dispenser, it shall
be equipped with the hydrogen detection and alarm device. When the hydrogen
leakage occurs and its content in the air reaches to 0.4% (10% LEL), it shall
Electrostatic discharge test
of hydrogen filling hose 6.3.7 7.3.9.6 √ -
Test of hydrogen detection
alarm 6.3.6 7.3.9.7 √ -
Note: “√” means the item to be inspected; “-” means the items not inspected.
7.3 Test of whole dispenser
7.3.1 Routine inspection
Use the visual inspection and routine method to check the hydrogen dispenser,
which shall be in accordance with the requirements of 6.1.1, 6.1.2, 6.2.3.
7.3.2 Gas tightness test
7.3.2.1 Test medium
The gas tightness test of the hydrogen dispenser uses a helium gas or a helium-
nitrogen gas mixture (in which the volumetric fraction of helium gas is not less
than 5%) as a test medium.
7.3.2.2 Test method
Connect the inlet of the hydrogen dispenser to the gas source. Turn off the
dispenser nozzle. Increase the pressure by 5 MPa each time. Then hold it at
this pressure for 15 minutes. Use the leak detection solution to check all piping
systems. After confirming that there is no leakage, gradually increase the
pressure until the maximum working pressure. Hold this pressure for 24 h,
which shall comply with the requirements of 6.2.8.
7.3.3 Pressure resistance test
7.3.3.1 Test medium
The compressive strength test of the hydrogen dispenser uses clean, oil-free
compressed air or nitrogen as the test medium.
7.3.3.2 Test method
Connect the inlet of the hydrogen dispenser to the gas source. Use a plug to
replace the safety valve. Turn off the dispenser nozzle. Gradually increase the
pressure to 1.1 times the maximum working pressure. Hold this pressure for 10
minutes, which shall meet the requirements of 6.2.9.
7.3.4 Test of metering accuracy
7.3.4.1 Test interval and number of tests
7.3.6 Test of environmental temperature adaptability
7.3.6.1 The low temperature test is carried out as follows:
a) It is carried out according to the test Ad: “low temperature test of
temperature gradient of the heat dispassion test sample” in GB/T 2423.1,
the temperature is - 25 °C and the duration is 2 h;
b) Use the test method of 7.3.4 and 7.3.5 to test the hydrogen dispenser,
which shall comply with the provisions of 6.2.1 and 6.2.2.
7.3.6.2 The high temperature test is carried out as follows:
a) It is carried out according to the test Bd: “high temperature test of
temperature gradient of the heat dispassion test sample” in GB/T 2423.2,
the temperature is 55 °C and the duration is 2 h;
b) Use the test method of 7.3.4 and 7.3.5 to test the hydrogen dispenser,
which shall comply with the provisions of 6.2.1 and 6.2.2.
7.3.6.3 The test of relative humidity adaptability is carried out as follows:
a) It is carried out according to the test Db: “Cyclic damp heat test method”
in GB/T 2423.4, the upper limit of temperature is 55 °C, the lower limit of
temperature is 25 °C, the test period is 24 h;
b) Use the test method of 7.3.4 and 7.3.5 to test the hydrogen dispenser,
which shall comply with the provisions of 6.2.1 and 6.2.2.
7.3.7 Electromagnetic compatibility test
It is carried out according to the provisions of GB/T 19237. It shall meet the
requirements of 6.2.10.
7.3.8 Test of power-down protection and re-display
When the hydrogen dispenser changes from the energized state to the power-
down state, it can protect and recall the data of the current refueling, check the
power-down re-display time, which shall meet the requirements of 6.1.21.
7.3.9 Test of safety performance
7.3.9.1 Communication interface test (if applicable)
7.3.9.1.1 Test equipment
On-board cylinder temperature-pressure signal simulation generator.
7.3.9.1.2 Test method
7.3.9.5 Electrical safety test
The electrical safety performance indicators such as the grounding leakage
current and electric strength of the hydrogen dispenser shall be inspected in
accordance with the relevant provisions of GB/T 19237 and shall comply with
the provisions of 6.3.10.
7.3.9.6 Electrostatic discharge test of hydrogen filling hose
Use the meter to check the static conductivity of the hydrogen filling hose, which
shall meet the requirements of 6.3.7.
7.3.9.7 Test of hydrogen detection alarm
It is carried out according to the provisions of JJG 693, which shall meet the
requirements of 6.3.7.
8 Inspection rules
8.1 Exit-factory inspection
8.1.1 The exit-factory inspection of hydrogen dispenser shall be carried out one
by one according to the inspection items as specified in Table 2.
8.1.2 The product must pass the inspection of the quality inspection department
of the manufacturer. It can only exit factory after obtaining the product certificate.
8.1.3 The exit-factory products shall be accompanied by the instruction manual
and attachments as specified in the relevant technical documents.
8.2 Type inspection
8.2.1 Type inspection shall be carried out according to the items as specified in
Table 2.
8.2.2 Type inspection shall be carried out in any of the following cases:
a) In case of finalization of trial-produced product;
b) In case of significant changes in the design, process and materials used
in the product, which may affect the performance of the product;
c) When the production is restored after suspension for more than one year;
d) When the national quality supervision agency proposes type inspection.
manual.
9.2.2 The outer packaging of the hydrogen dispenser shall comply with the
provisions of GB/T 13384.
9.2.3 The outer wall of the package shall have clearly marked signs and texts,
including at least:
a) Name of the manufacturer;
b) Product model, specification, exit-factory number;
c) Net weight and gross weight of the product;
d) Dimensions of the package.
9.2.4 The pictorial mark of the outer packaging shall comply with GB/T 191. It
must have the graphic and text marks such as “fragile items”, “upward”, “no
tumbling” and “avoid rain”.
9.3 Transportation and storage
9.3.1 During the transportation, the inclination of the package shall not exceed
30°.
9.3.2 The hydrogen dispenser shall be stored under the packaging conditions
and placed in a sheltered place that is dry and ventilated. There shall be no
harmful gases corrosive to the metal in the place.
......
| Standard ID | GB/T 31138-2022 (GB/T31138-2022) | | Description (Translated English) | Hydrogen dispensers | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | F19 | | Classification of International Standard | 27.010 | | Word Count Estimation | 34,336 | | Date of Issue | 2022-10-14 | | Date of Implementation | 2022-10-12 | | Older Standard (superseded by this standard) | GB/T 31138-2014 | | Drafting Organization | Beijing Low-Carbon and Clean Energy Research Institute, China National Institute of Standardization, Foshan Green Development and Innovation Research Institute, Zhejiang University, Beijing Hyderison Technology Co., Ltd., China Testing Technology Research Institute, Jiangsu Guofu Hydrogen Energy Technology Equipment Co., Ltd., Zhengxing Hydrogen Electric Technology Zhengzhou Co., Ltd., Electric Power Planning Institute Co., Ltd., China Society of Technology and Economics | | Administrative Organization | National Hydrogen Energy Standardization Technical Committee (SAC/TC 309) | | Proposing organization | National Hydrogen Energy Standardization Technical Committee (SAC/TC 309) | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Management Committee |
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