Foreword
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This document is developed in accordance with the rules given in GB/T 1.1-202 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.
This document replaces GB/T 34425-2017 Fuel cell electric vehicles - Hydrogen refuelling nozzle. In addition to structural adjustment and editorial changes, the following main technical changes have been made compared with GB/T 34425-2017:
a) The air tightness test requirements are modified, and the test contents for detecting air tightness after the hydrogen refuelling nozzle is connected with loose fit test equipment and tight fit test equipment are added (see 6.3 hereof; 4.2.1 of Edition 2017);
b) The hydrostatic pressure strength test requirements are modified, and the test pressure is modified to "3 times the nominal working pressure" (see 6.12 hereof; 4.2.9 of Edition 2017);
c) The pre-cooled hydrogen exposure test is added (see 6.17 hereof);
d) Misoperation test is added (see 6.18 hereof);
e) Compatibility test is added (see 6.19 hereof);
f) Abuse test is added (see 6.20 hereof);
g) Freezing test is added (see 6.21 hereof);
h) Dimension requirements for the envelope of hydrogen refuelling nozzle/port and the sealing parts on the 70MPa hydrogen refuelling nozzle side are added (see Figures A.1 and A.2);
i) Dimensional requirements for JQK-35-40/18 loose fit test equipment, tight fit test equipment and wear mode test equipment are added (see Figures B.2, C.2 and D.2);
j) Dimensional requirements for JQK-35-25/12HF loose fit test equipment, tight fit test equipment and wear mode test equipment are added (see Figures B.3, C.3 and D.3);
k) Dimensional requirements for JQK-70-25/12 loose fit test equipment, tight fit test equipment and wear mode test equipment are added (see Figures B.4, C.4 and D.4);
l) The torque requirement for the connection assembly are deleted (see 4.2.6 of Edition 2017).
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This document was proposed by the Ministry of Industry and Information Technology of the People's Republic of China.
This document is under the jurisdiction of the National Technical Committee of Auto Standardization (SAC/TC 114).
Fuel cell electric vehicles hydrogen refueling nozzle
1 Scope
This document defines the hydrogen refueling nozzle for fuel cell electric vehicles, specifies the technical requirements and test requirements of the hydrogen refueling nozzle, and describes the test methods of the hydrogen refueling nozzle and its connecting components.
This document is applicable to the fuel cell electric vehicles hydrogen refueling nozzle using compressed hydrogen as working medium, with nominal working pressure not exceeding 70 MPa and medium temperature ranging from -40°C to 85°C.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
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 test
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 receptacle
3 Terms and definitions
For the purposes of this document, the terms and definitions established in GB/T 24548 and GB/T 26779-2021 and the following apply.
3.1
hydrogen refueling nozzle
refueling interface installed at the end of the dispenser hose of the hydrogen dispenser to connect the hydrogen dispenser to the vehicle
3.2
receptacle
general term for the components that connect the vehicle to the hydrogen refueling nozzle during refueling
[Source: GB/T26779-2021, 3.1, modified]
3.3
connector
receptacle and nozzle assembly that can be quickly connected and disconnected for hydrogen refueling of fuel cell electric vehicles or storage systems
3.4
cycle
entire process including the connection between the hydrogen refueling nozzle and the receptacle, pressurization to the design pressure, depressurization, and disconnection
3.5
hydrogen service level
pressure level of hydrogen when the hydrogen refueling nozzle works
Note: See Table 1 for the corresponding relationship between nominal working pressure (NWP), maximum operating pressure (MOP), maximum allowable working pressure (MAWP) and hydrogen service level (HSL).
Table 1 Pressure level
Nominal working pressure P
(NWP) /MPa Maximum operating pressure (MOP)
(1.25 NWP) /MPa Maximum allowable working pressure (MAWP)
(1.375 NWP) /MPa Hydrogen service level (HSL)
35 43.8 48.2 H35
70 87.5 96.3 H70
4 Types
5 Requirements
6 Test methods
7 Marking
Annex A
(Normative)
Hydrogen refueling nozzle/receptacle connection
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Types
5 Requirements
6 Test methods
7 Marking
Annex A (Normative) Hydrogen refueling nozzle/receptacle connection
Annex B (Normative) Tight fit test equipment
Annex C (Normative) Loose fit test equipment
Annex D (Normative) Wear mode test equipment
