GB/T 34425-2023 PDF EnglishUS$380.00 · In stock · Download in 9 seconds
GB/T 34425-2023: Fuel cell electric vehicles hydrogen refueling nozzle Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 34425: Historical versions
Similar standardsGB/T 34425-2023: Fuel cell electric vehicles hydrogen refueling nozzle---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT34425-2023GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 43.081.01 CCS T 47 Replacing GB/T 34425-2017 Fuel cell electric vehicles hydrogen refueling nozzle Issued on. DECEMBER 28, 2023 Implemented on. JULY 01, 2024 Issued by. State Administration for Market Regulation; Standardization Administration of PRC. Table of ContentsForeword... 3 1 Scope... 5 2 Normative references... 5 3 Terms and definitions... 5 4 Models... 6 5 Requirements... 7 5.1 General requirements... 7 5.2 Performance requirements... 8 6 Test methods... 11 6.1 General provisions... 11 6.2 Appearance inspection... 12 6.3 Air tightness... 12 6.4 Drop... 12 6.5 Valve operating handle... 13 6.6 Abnormal load... 13 6.7 High and low temperature simulation... 14 6.8 Durability... 15 6.9 Aging resistance... 16 6.10 Hydrogen compatibility... 16 6.11 Resistor... 16 6.12 Hydrostatic strength... 16 6.13 Corrosion resistance... 16 6.14 Deformation... 17 6.15 Pollution... 17 6.16 Thermal cycle... 17 6.17 Precooled hydrogen exposure... 17 6.18 Misoperation... 18 6.19 Compatibility... 18 6.20 Abuse... 18 6.21 Freezing... 19 6.22 Swing/twist... 20 7 Marking... 20 Appendix A (Normative) Hydrogen refueling nozzle/receptacle connection... 21 Appendix B (Normative) Tight fit test equipment... 22 Appendix C (Normative) Loose fit test equipment... 26 Appendix D (Normative) Wear mode testing equipment... 301 ScopeThis document defines the hydrogen refueling nozzle for fuel cell electric vehicles, specifies the technical requirements and test requirements for the hydrogen refueling nozzle, describes the test methods for the hydrogen refueling nozzle and its connecting components. This document applies to fuel cell electric vehicle hydrogen refueling nozzles, that use compressed hydrogen as the working medium, has a nominal working pressure not more than 70 MPa and a medium temperature of -40 °C ~ 85 °C.2 Normative referencesThe contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, for dated reference documents, only the version corresponding to the date applies to this document; for undated reference documents, the latest version (including all amendments) applies to this document. GB/T 1690-2010 Rubber, vulcanized or thermoplastic - Determination of the effect of liquids GB/T 7762-2014 Rubber, vulcanized or thermoplastic - Resistance to ozone cracking - Static strain testing GB/T 10125 Corrosion tests in artificial atmospheres - Salt spray tests GB/T 24548 Fuel cell electric vehicles - Terminology GB/T 26779-2021 Hydrogen fuel cell electric vehicle refueling receptacle3 Terms and definitionsThe terms and definitions as defined in GB/T 24548 and GB/T 26779-2021, as well as the following terms and definitions, apply to this document. 3.1 Hydrogen refueling nozzle A refueling nozzle, which is installed at the end of the hydrogenation hose of the hydrogen refueling machine, to connect the hydrogen refueling machine and the vehicle. 3.2 Receptacle When refueling, the sum of components connecting the vehicle to the hydrogen refueling nozzle. [Source. GB/T 26779-2021, 3.1, with modifications] 3.3 Connector A receptacle and hydrogen refueling nozzle assembly, that can be quickly connected and disconnected to refuel fuel cell electric vehicles or storage systems. 3.4 Cycle A whole process including the connecting the hydrogen refueling nozzle and the receptacle, pressurizing to the design pressure, depressurizing, disconnecting.4 ModelsThe hydrogen refueling nozzle's model consists of the following parts.5 Requirements5.1 General requirements 5.1.4 The hydrogen refueling nozzle should have filters and other protective measures, to prevent upstream solid matter from entering. 5.1.5 The hydrogen refueling nozzle shall be able to work normally in the ambient temperature range of -40 °C ~ 60 °C and the medium temperature range of -40 °C ~ 85 °C. 5.1.6 For the hydrogen refueling nozzle, it is not allowed to open the one-way valve of the receptacle through mechanical means. 5.1.7 When the internal pressure is greater than 1 MPa, the hydrogen refueling nozzle shall not be removed. 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 bubbles are detected, use a vacuum test (overall cumulative test) to measure the leakage rate, OR use other equivalent methods to confirm that the hydrogen leakage rate is less than 20 cm3/h at 20 °C and 101 kPa. 5.2.2 Drop After testing according to the method specified in 6.4, the hydrogen refueling nozzle can be connected normally to the receptacle and the tight fit test equipment specified in Appendix B, which shall meet the requirements of 5.2.1 and 5.2.5. 5.2.6 Durability 5.2.6.1 Hydrogen refueling nozzle After testing according to the method specified in 6.8.1, the hydrogen refueling nozzle meets the requirements in 5.2.1, 5.2.5 (only -40° C related content) and 5.2.10. of 5.2.9. During the test, according to the requirements in Table 3, replace the loose and tight fit test equipment every 15000 times and check their wear. The wear and tear of test equipment shall comply with the requirements of Appendix D. 5.2.7 Aging resistance 5.2.7.1 Oxygen aging resistance Conduct an oxygen aging resistance test on the hydrogen refueling nozzle seal, according to the method specified in 6.9.1.There shall be no obvious deformation, deterioration, spots, cracks, etc. 5.2.9 Resistance According to the method specified in 6.11, the resistance of the connector shall not be greater than 1000 Ω under pressure and non-pressure conditions. Conduct resistance tests before and after the life cycle test. 5.2.10 Hydrostatic strength Carry out the test according to the method specified in 6.12.There is no leakage in the hydrogen refueling nozzle and connector during the test. The hydrostatic strength test is the final test. The sample shall not be used for any other tests after this test.6 Test methods6.1 General provisions 6.1.1 Test conditions Unless otherwise specified, the test shall be carried out under the following conditions. 6.1.2 Measurement parameters, their units, accuracy The measurement parameters, their units, accuracy requirements are as shown in Table 2. 6.2 Appearance inspection Visually inspect the hydrogen refueling nozzle. 6.3 Air tightness When the hydrogen refueling nozzle is connected to the receptacle and the receptacle is in a closed state, OR when the hydrogen refueling nozzle is not connected to the receptacle and the hydrogen refueling nozzle is in a closed state, leak detection gas is passed through to carry out the test at 0.5 MPa and 1.5 times the nominal working pressure, respectively. 6.4 Drop Place the hydrogen refueling nozzle in an environment of -40 °C for 24 hours. Then connect it to a filling hose which has a length of 5 m. 6.5 Valve operating handle For a hydrogen refueling nozzle equipped with a valve operating handle, a force of 200 N is applied in the opening and closing directions of the farthest point from the rotation axis. The tests are conducted under two conditions. 6.8 Durability 6.8.1 Hydrogen refueling nozzle Perform 100000 cycles on the hydrogen refueling nozzle. One cycle is defined as. 6.8.2 Connectors Connect the connector to the test equipment; the outlet of the receptacle is connected to the atmosphere; the air inlet of the hydrogen refueling nozzle is connected to the leakage test gas source. 6.22 Swing/twist Install the receptacle horizontally on a fixed support, that can withstand the specified load without displacement or deflection.7 MarkingThe hydrogen refueling nozzle shall have the following permanent and clear markings. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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