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GB/T 34425-2023 (GBT34425-2023)

GB/T 34425-2023_English: PDF (GBT 34425-2023, GBT34425-2023)
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GB/T 34425-2023English529 Add to Cart 5 days [Need to translate] Fuel cell electric vehicles hydrogen refueling nozzle Valid GB/T 34425-2023

BASIC DATA
Standard ID GB/T 34425-2023 (GB/T34425-2023)
Description (Translated English) Fuel cell electric vehicles hydrogen refueling nozzle
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard T47
Classification of International Standard 43.081.01
Word Count Estimation 26,250
Date of Issue 2023-12-28
Date of Implementation 2024-07-01
Older Standard (superseded by this standard) GB/T 34425-2017
Drafting Organization Shanghai Shunhua New Energy Systems Co., Ltd., China Automotive Research Institute New Energy Vehicle Inspection Center (Tianjin) Co., Ltd., China Automotive Technology Research Center Co., Ltd., Toyota Motor (China) Investment Co., Ltd., Shanghai Motor Vehicle Inspection and Certification Technology Research Center Co., Ltd., Shandong Guochuang Fuel Cell Technology Innovation Center Co., Ltd., Guangzhou Automobile Group Co., Ltd., China Automotive Research Institute New Energy Technology Co., Ltd., Shanghai Baitu Cryogenic Valve Co., Ltd., Hefei Guoxuan Hi-Tech Power Energy Co., Ltd.
Administrative Organization National Automotive Standardization Technical Committee (SAC/TC 114)
Proposing organization Ministry of Industry and Information Technology of the People's Republic of China
Issuing agency(ies) State Administration for Market Regulation, National Standardization Administration

Standards related to: GB/T 34425-2023

GB/T 34425-2023.Hydrogenation gun for fuel cell electric vehicles
GB/T 34425-2023 English version. Fuel cell electric vehicles hydrogen refueling nozzle
National Standards of People's Republic of China
Replace GB/T 34425-2017
Fuel cell electric vehicle hydrogenation gun
State Administration for Market Regulation
Released by the National Standardization Administration Committee
1 Scope
This document defines the hydrogenation gun for fuel cell electric vehicles, specifies the technical requirements and test requirements for the hydrogenation gun, and describes the hydrogenation gun.
Test methods for guns and their connecting components.
This document is applicable to compressed hydrogen as the working medium, the rated working pressure does not exceed 70MPa, and the medium temperature is -40℃~
85℃ fuel cell electric vehicle hydrogenation gun.
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations
For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to
this document.
GB/T 1690-2010 Test method for liquid resistance of vulcanized rubber or thermoplastic rubber
GB/T 7762-2014 Static tensile test for ozone cracking resistance of vulcanized rubber or thermoplastic rubber
GB/T 10125 Artificial atmosphere corrosion test salt spray test
GB/T 24548 Fuel cell electric vehicle terminology
GB/T 26779-2021 Hydrogenation port for fuel cell electric vehicles
3 Terms and definitions
The following terms and definitions as defined in GB/T 24548 and GB/T 26779-2021 apply to this document.
5 requirements
5.1 General requirements
5.1.1 The type and size of the hydrogenation gun interface should comply with the requirements of Appendix A in GB/T 26779-2021.The design of the hydrogenation gun should ensure that it
It can only be connected to a hydrogenation port with the same or higher working pressure level. Envelope surface dimensions of hydrogenation gun and hydrogenation port, 70MPa hydrogenation gun
The dimensions of the sealing side parts should meet the requirements in Appendix A.
5.1.2 The materials of the hydrogenation gun in contact with hydrogen should be compatible with hydrogen, and hydrogen embrittlement will not occur within the designed service life. Hydrogenation gun should
Made of non-fire material.
5.1.3 The connection between the hydrogenation gun and the hydrogenation machine hose should not rely solely on thread sealing.
5.1.4 The hydrogenation gun should have filters and other protective measures to prevent upstream solid matter from entering.
5.1.5 The hydrogenation gun should be able to work normally in the ambient temperature range of -40℃~60℃ and the medium temperature range of -40℃~85℃.
5.1.6 The hydrogenation gun is not allowed to open the one-way valve of the hydrogenation port through mechanical means.
5.1.7 When the internal pressure is greater than 1MPa, the hydrogenation gun should not be removed.
5.1.8 The axial force for connecting, locking, unlocking or disconnecting an unpressurized hydrogenation gun should be less than or equal to 90N. If the secondary locking mechanism is rotated
For rotary type, the torque used for locking or unlocking should not exceed 1N·m; if the secondary locking mechanism is axial type, the force used for locking or unlocking should not
More than 90N.
5.1.9 The unlocking force or torque of type A and type B hydrogenation guns after pressurization should not be greater than 450N or 5N·m.
5.1.10 The requirements for hydrogenation guns according to different types are as follows.
a) Type A. This type of hydrogenation gun is suitable for devices where the filling hose is under high pressure after the hydrogenation machine is shut down. Only when the hydrogenation gun is connected to the
Hydrogenation can only be performed when the hydrogen port is correctly connected. This type of hydrogenation gun is equipped with one or more integrated valves. After removing the hydrogenation gun
Before starting, hydrogenation should be stopped by closing the valve, and then opening the drain line to ensure that there is a gap between the hydrogenation gun stop valve and the hydrogenation port one-way valve.
The gas has been discharged safely.
b) Type B. This type of hydrogenation gun is suitable for devices where the filling hose is under high pressure after the hydrogenation machine is shut down. Only when the hydrogenation gun is connected to the
Hydrogenation can only be performed when the hydrogen port is correctly connected. An independent tee is installed directly or indirectly on the front end of the air inlet of this type of hydrogenation gun.
valve. Before removing the hydrogenation gun, the gas in the gun head should be safely drained through this valve. External three-way valves should be marked
Indicates the opening, closing and deflation positions.
c) Type C. This type of hydrogenation gun is suitable for devices where the filling hose is depressurized (≤0.5MPa) after the hydrogenation machine is shut down. Only when the hydrogenation gun
Hydrogenation can only be carried out when it is correctly connected to the hydrogenation port. By receiving the correct connection signal from the hydrogenation gun, the hydrogenation machine can control the phase
off function.
5.2 Performance requirements
5.2.1 Air tightness
Carry out the air tightness test according to the method specified in 6.3.If no bubbles are detected within the specified time, the sample passes the test. If detected
For bubbles, use a vacuum test (overall accumulation test) to measure the leakage rate, or use other equivalent methods to confirm that the hydrogen leakage rate is within
Less than 20cm3/h at 20℃ and 101kPa.
5.2.2 Drop
After testing according to the method specified in 6.4, the hydrogenation gun can be connected normally to the hydrogenation port and the tight-fitting test equipment specified in Appendix B, and meets the requirements.
Comply with the requirements of 5.2.1 and 5.2.5.
5.2.3 Valve operating handle
Carry out the test according to the method specified in 6.5, and there will be no damage to the operating handle or bayonet.
5.2.4 Abnormal load
Carry out the test according to the method specified in 6.6.The connecting device of the hydrogenation gun and the loose fitting test equipment specified in Appendix C can withstand the test during operation.
Specified load, no distortion, damage or leakage.
After the test, the hydrogenation gun and connecting device comply with the provisions of 5.2.1, 5.2.5 and 5.2.10.
5.2.5 High and low temperature simulation
5.2.5.1 Leakage
Carry out the test according to the method specified in 6.7.1.There should be no bubbles in the hydrogenation gun and connecting device within 1 minute, or the leakage rate should be less than 20cm3/h.
5.2.5.2 Operability
Carry out the test according to the method specified in 6.7.2.After the operation test is completed, the connecting device can be connected and disconnected normally, and the filling function is normal.
5.2.6 Durability
5.2.6.1 Hydrogenation gun
After testing according to the method specified in 6.8.1, the hydrogenation gun meets the requirements in 5.2.1, 5.2.5 (only -40°C related content) and 5.2.10.
When connected to the wear mode test equipment for testing, the hydrogenation gun meets the requirements of 5.2.1.
Before and after the test, the hydrogenation gun complied with the requirements of 5.2.9.
During the test, according to the requirements in Table 3, replace the loose and tight fit test equipment every 15,000 times and check their wear. Test equipment
Wear should comply with the requirements of Appendix D.
5.2.6.2 Connecting devices
Connections are designed to withstand the highest airflow conditions. After completing the test according to the method specified in 6.8.2, the hydrogenation gun shall be used according to the method specified in 6.3a)
Carry out the test and meet the requirements of 5.2.1.
5.2.7 Aging resistance
5.2.7.1 Oxygen aging resistance
Carry out oxygen aging resistance test on the hydrogenation gun seal according to the method specified in 6.9.1.There should be no obvious deformation, deterioration, spots and cracks.
and other phenomena.
5.2.7.2 Ozone aging resistance
Conduct an ozone aging resistance test on the hydrogenation gun seal according to the method specified in 6.9.2.There should be no obvious deformation, deterioration, spots or cracks.
Patterns and other phenomena.
5.2.8 Hydrogen compatibility
Conduct an immersion test on the non-metallic materials in direct contact with hydrogen in the hydrogenation gun according to the method specified in 6.10.The sample should not show any decrease in explosiveness.
For signs of pressure damage, the volume expansion rate should not exceed 25%, the shrinkage rate should not exceed 1%, and the mass loss should not exceed 10%.
5.2.9 Resistor
According to the method specified in 6.11, the resistance of the connecting device shall not be greater than 1000Ω under pressure and non-pressure conditions. Before life cycle test
Resistance tests were then carried out.
5.2.10 Hydrostatic strength
Carry out the test according to the method specified in 6.12.There is no leakage in the hydrogenation gun and connecting device during the test.
The hydrostatic strength test is the final test and the sample should not be used for any other tests after this test.
5.2.11 Corrosion resistance
The test is carried out according to the method specified in 6.13.The hydrogenation gun does not suffer from corrosion or loss of protective coating, and shows good safety and meets the requirements.
5.2.1 [only test 6.3a)] and the relevant requirements of 5.2.9.
5.2.12 Deformation
Test according to the method specified in 6.14.The components that need to be connected/assembled on site can withstand a torque of 1.5 times the installation torque.
Deformation, damage or leakage occurs.
5.2.13 Pollution
Conduct the test according to the method specified in 6.15.The hydrogenation gun can withstand 10 consecutive cycles of pollution tests and meets the relevant requirements of 5.6.
5.2.14 Thermal cycling
The test is carried out according to the method specified in 6.16.The hydrogenation gun can withstand 100 thermal cycles and meets the relevant requirements of 5.2.1, 5.2.5 and 5.2.10.
5.2.15 Precooled hydrogen exposure
Test according to the method specified in 6.17.The hydrogenation gun and connecting device can withstand the pre-cooled hydrogen during filling.
After the test, the hydrogenation gun and connecting device comply with the provisions of 5.2.1 and 5.2.5.
5.2.16 Misoperation
Conduct the test according to the method specified in 6.18.When the C-type hydrogenation gun is connected incorrectly, there should be no air flow, leakage or disconnection.
The phenomenon of connection.
5.2.17 Compatibility
Carry out the test according to the method specified in 6.19.
The hydrogenation gun should be able to connect to a hydrogenation port with a higher rated working pressure and realize the filling function. The connected hydrogenation gun and hydrogenation port
Comply with the provisions of 5.2.1 and 5.2.5.
The hydrogenation gun cannot be correctly connected to the hydrogenation port with a lower rated working pressure, and the filling function cannot be realized after connection.
5.2.18 Abuse
Carry out the test according to the method specified in 6.20, and the test tooling should be installed as a cantilever on the supporting component.
After the test, the hydrogenation gun and connecting device comply with the provisions of 5.2.1 and 5.2.5.
5.2.19 Freezing
Carry out the test according to the method specified in 6.21.After the filling of the hydrogenation gun is completed, the hydrogenation gun and the hydrogenation port will freeze for no more than 30 seconds.
5.2.20 Swing/twist
Carry out the test according to the method specified in 6.22.The hydrogenation gun, hydrogenation port and connecting device should not be loose or damaged.
6 Test methods
6.1 General provisions
6.1.1 Test conditions
Unless otherwise specified, the test shall be carried out under the following conditions.
a) The test environment temperature is 15℃~25℃.
b) The test medium is clean dry hydrogen, dry helium, or a mixture of 10% helium and nitrogen.
c) Allowable deviations of test temperature and pressure.
1) The allowable deviation of high temperature is 0℃~3℃;
2) The allowable deviation of low temperature is -3℃~0℃;
3) The allowable deviation of pressure is 0MPa~3MPa.
6.1.2 Measurement parameters, their units and accuracy
The measurement parameters, their units, and accuracy requirements are shown in Table 2.
6.2 Appearance inspection
Visually inspect the hydrogenation gun.
6.3 Air tightness
When the hydrogenation gun is connected to the hydrogenation port and the hydrogenation port is closed, or when the hydrogenation gun is not connected to the hydrogenation port and the hydrogenation gun is closed
Under the pressure, leak detection gas is passed through, and the tests are carried out at 0.5MPa and 1.5 times the rated working pressure respectively. The duration of each measurement point is a certain amount of time.
After 3 minutes, use leak detection fluid or leak detector to check the air tightness.
The connection device for air tightness test is.
a) Hydrogenation port. should comply with the requirements of Appendix A in GB/T 26779-2021;
b) Tight fit test equipment. should comply with the requirements of Appendix B;
c) Loose fit test equipment. should comply with the requirements of Appendix C.
6.4 Drop
Place the hydrogenation gun in an environment of -40°C for 24 hours, then connect it to a filling hose with a length of 5m, and then drop it from a height of 2m to the mixing
Concrete floor, as shown in Figure 1.Within 5 minutes after the hydrogenation gun leaves the -40°C environment, drop it 10 times continuously, and then pressurize it to the maximum
Working pressure, drop 10 more times in the next 5 minutes.
6.5 Valve operating handle
For a hydrogenation gun equipped with a valve operating handle, apply.200N in the opening and closing directions of the farthest point from the rotation axis.
force. The tests were conducted under two conditions.
a) The hydrogenation gun and the loose fit test equipment are correctly connected;
b) Select an abnormal connection method between the hydrogenation gun and the hydrogenation port. the hydrogenation gun is not fully inserted into the hydrogenation port, the hydrogenation gun is skewed when inserted, or
The turning handle is not in place.
6.6 Abnormal load
The hydrogenation gun and loose fit test equipment were tested under pressurized and non-pressurized conditions respectively. During the pressurization test, the hydrogenation gun and loose fitting
Pressurize the test equipment to the maximum working pressure.
In use, the connected hydrogenation gun and loose fit test equipment are subject to the following abnormal loads. The method of applying the load is shown in Figure 2.
a) Pull along the longitudinal axis of the hydrogenation gun or hydrogenation port;
b) The torque exerted on the end joint of the hydrogenation gun.
Apply abnormal loads of 1000N and 120N·m to the connected hydrogenation gun and hydrogenation port, and observe whether they are deformed or damaged.
Apply abnormal loads of.2000N and 240N·m to the connected hydrogenation gun and hydrogenation port to test for leaks.
6.7 High and low temperature simulation
6.7.1 Leakage
Before starting the test, use nitrogen to purge the hydrogenation gun and the connecting device, and then introduce 7MPa leakage test gas into them.
and sealed.
After the hydrogenation gun and the connecting device are kept at the following ambient temperature for 2 hours, an air tightness test is performed, and then the outlet of the connecting device is blocked.
Apply test pressure to the inlet end of the hydrogenation gun.
---Connection device. The ambient temperature is -40°C, and the air tightness test is conducted at 0.5MPa and maximum working pressure;
---Connection device. The ambient temperature is 50°C, and the air tightness test is conducted at 1MPa and maximum working pressure;
---Hydrogenation gun. The ambient temperature is -40°C, and the air tightness test is conducted at 0.5MPa and maximum working pressure;
---Hydrogenation gun. The ambient temperature is 50°C, and the air tightness test is carried out at 1MPa and maximum working pressure.
The air tightness test is carried out using the following or equivalent methods.
a) At -40°C, immerse in -40°C liquid (ethanol or ethanol mixture) for 1 minute;
b) At 50℃, immerse in 50℃ water for 1 minute.
6.7.2 Operability
Connect the hydrogenation gun and the hydrogenation port. The ambient temperature is -40°C. Pressurize to the maximum working pressure, then release the pressure and disconnect. Repeat the above.
Operate 10 times.
Connect the hydrogenation gun and the hydrogenation port. The ambient temperature is 85°C. Pressurize to the maximum working pressure, then release the pressure and disconnect, and repeat the above operations.
Do this 10 times.
6.8 Durability
6.8.1 Hydrogenation gun
Perform 100,000 cycles on the hydrogenation gun. One cycle is defined as.
a) Correctly connect the hydrogenation gun to the test equipment;
b) Pressurize the connecting device to the maximum working pressure;
c) Depressurize the connecting device;
d) Disconnect.
When disconnected, the test equipment rotates the hydrogenation gun randomly or in an incremental pattern at a certain angle.
Replace the loose and tight fit test equipment every 15,000 cycles. The test equipment is selected from Table 3.
The hydrogenation gun can replace wearing parts every 15,000 cycles, such as rubber seals, sealing gaskets, and seals that match the hydrogenation port.
Sealing parts, etc.
6.8.2 Connecting devices
Connect the connecting device to the test equipment, the outlet of the hydrogenation port is connected to the atmosphere, and the air inlet of the hydrogenation gun is connected to the leakage test gas source.
Each connecting device performs 30 cycles, and one cycle lasts 2 seconds. Each cycle begins at rated operating pressure (equivalent to maximum air flow
condition), at the end of each cycle, the air source pressure cannot be lower than 80% of the working pressure, and the air source system cannot limit the flow during the test.
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