GB/T 34425-2023
Fuel cell electric vehicles hydrogen refueling nozzle (English Version)
- Standard No.
- GB/T 34425-2023
- Language
- Chinese, Available in English version
- Release Date
- 2023
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 34425-2023
- Replace
- GB/T 34425-2017
- Introduction
1. Standard Overview
GB/T 34425-2023 "Fuel Cell Electric Vehicle Hydrogen Refueling Gun" replaces the old standard GB/T34425-2017, mainly updating the technical requirements and test methods. This standard specifies the definition, model, general requirements and performance requirements of fuel cell electric vehicle hydrogen refueling guns, and describes in detail the test methods of hydrogen refueling guns and their connection components.
2. Background of Standard Formulation
With the rapid development of fuel cell technology, higher requirements are placed on the safety and reliability of hydrogen refueling guns. The new standard adds a number of test contents, including pre-cooling hydrogen exposure, misoperation and abuse tests, to ensure that the hydrogen refueling gun can still work normally under various extreme conditions.
3. Comparison of standard frameworks
Standard requirements Old version content (GB/T34425—2017) New version content (GB/T34425—2023) Air tightness test Only basic requirements are specified Requirements for loose fit and tight fit test equipment are added Hydrostatic pressure strength Specific pressure value is not specified Clearly specified as 3 times the rated working pressure High temperature and low temperature resistance test Basic requirements, no detailed parameters Added specific temperature range and test methods 4. Technical Requirements Interpretation
4.1 General Requirements
The design of the hydrogenation gun must ensure that it can only be connected to the hydrogenation port of the same or higher pressure level, and the interface type and size must comply with the requirements of GB/T26779-2021. At the same time, the material must have good hydrogen compatibility to avoid hydrogen embrittlement.
4.2 Performance Requirements
- Airtightness: There is no leakage at both rated pressure and maximum pressure, verified by vacuum test or equivalent method.
- Drop test: Drop 10 times at -40°C to ensure connection stability and sealing performance.
- Durability: The airtightness and connection requirements must still be met after a cumulative 100,000 cycles.
5. Implementation Suggestions
In practical applications, it is recommended to:
- Strictly select and purchase according to the standards to ensure that the hydrogen refueling gun matches the vehicle.
- Periodically maintain and inspect, especially the seals and connection mechanisms.
- Train operators to understand misoperation and emergency treatment measures.
GB/T 34425-2023 Referenced Document
- GB/T 10125 Corrosion tests in artificial atmospheres—Salt spray tests
- GB/T 1690-2010 Rubber,vulcanized or thermoplastic.Determination of the effect of liquids
- GB/T 24548 Fuel cell electric vehicles.Terminology
- GB/T 26779-2021 Hydrogen fuel cell electric vehicle refueling receptacle
- GB/T 7762-2014 Rubber, vulcanized or thermoplastic.Resistance to ozone cracking.Static strain testing
GB/T 34425-2023 history
- 2023 GB/T 34425-2023 Fuel cell electric vehicles hydrogen refueling nozzle
- 2017 GB/T 34425-2017 Fuel cell electric vehicles—Hydrogen refuelling nozzle
