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GB/T 34425-2023 English PDF (GBT34425-2023)
GB/T 34425-2023 English PDF (GBT34425-2023)
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GB/T 34425-2023: Fuel cell electric vehicles hydrogen refueling nozzle
GB/T 34425-2023
GB
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 Contents
Foreword ... 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 ... 30
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 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 references
The 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 receptacle
3 Terms and definitions
The 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
5 Requirements
5.1 General requirements
5.1.1 The type and size of the hydrogen refueling nozzle shall comply with the
requirements of Appendix A in GB/T 26779-2021. The design of the hydrogen refueling
nozzle shall ensure that it can only be connected to a receptacle, which has the same or
higher working pressure level. The dimensions of the envelope surface of the hydrogen
refueling nozzle and the receptacle and the dimensions of the sealing side parts of the
70 MPa hydrogen refueling nozzle shall meet the requirements of Appendix A.
5.1.2 The materials of the hydrogen refueling nozzle in contact with hydrogen shall be
compatible with hydrogen; hydrogen embrittlement will not occur within the designed
service life. Hydrogen refueling nozzles shall be made of non-fireable materials.
5.1.3 The connection between the hydrogen refueling nozzle and the hydrogen refueling
machine hose shall not rely solely on thread sealing.
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.
5.1.8 The axial force for connecting, locking, unlocking or disconnecting an
unpressurized hydrogen refueling nozzle shall be less than or equal to 90 N. If the
secondary locking mechanism is a rotary type, the locking or unlocking torque shall not
exceed 1 N·m. If the secondary locking mechanism is an axial type, the locking or
unlocking force shall not exceed 90 N.
5.1.9 The unlocking force or torque of type A and type B hydrogen refueling nozzles
after pressurization shall not be greater than 450 N or 5 N·m.
5.1.10 The requirements for hydrogen refueling nozzles, according to different types,
are as follows.
a) Type A: This type of hydrogen refueling nozzle is suitable for devices, where the
filling hose is under high pressure after the hydrogen refueling machine is shut
down. Hydrogenation can only be carried out, when the hydrogen refueling
nozzle is correctly connected to the receptacle. This type of hydrogen refueling
nozzle is equipped with one or more integrated valves. Before removing the
hydrogen refueling nozzle, stop hydrogenation by closing the valve and then open
the drain line, to ensure that the gas between the hydrogen refueling nozzle's stop
5.2.5.1 Leakage
Carry out the test according to the method specified in 6.7.1. There shall be no bubbles
in the hydrogen refueling nozzle and connector within 1 minute, OR the leakage rate
shall be less than 20 cm3/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 connector can be connected and disconnected normally, meanwhile the
refueling function is normal.
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. When
connected to the wear mode test equipment for testing, the hydrogen refueling nozzle
meets the requirements of 5.2.1.
Before and after the test, the hydrogen refueling nozzle complies 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 15000 times and check their wear. The wear and tear of test
equipment shall comply with the requirements of Appendix D.
5.2.6.2 Connectors
Connectors are designed to withstand the highest airflow conditions. After completing
the test according to the method specified in 6.8.2, the hydrogen refueling nozzle shall
be tested according to the method specified in 6.3a) and meet the requirements of 5.2.1.
5.2.7 Aging resistance
5.2.7.1 Oxygen aging resistance
Conduct an oxygen aging resistance test on the hy...
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GB/T 34425-2023: Fuel cell electric vehicles hydrogen refueling nozzle
GB/T 34425-2023
GB
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 Contents
Foreword ... 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 ... 30
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 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 references
The 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 receptacle
3 Terms and definitions
The 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
5 Requirements
5.1 General requirements
5.1.1 The type and size of the hydrogen refueling nozzle shall comply with the
requirements of Appendix A in GB/T 26779-2021. The design of the hydrogen refueling
nozzle shall ensure that it can only be connected to a receptacle, which has the same or
higher working pressure level. The dimensions of the envelope surface of the hydrogen
refueling nozzle and the receptacle and the dimensions of the sealing side parts of the
70 MPa hydrogen refueling nozzle shall meet the requirements of Appendix A.
5.1.2 The materials of the hydrogen refueling nozzle in contact with hydrogen shall be
compatible with hydrogen; hydrogen embrittlement will not occur within the designed
service life. Hydrogen refueling nozzles shall be made of non-fireable materials.
5.1.3 The connection between the hydrogen refueling nozzle and the hydrogen refueling
machine hose shall not rely solely on thread sealing.
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.
5.1.8 The axial force for connecting, locking, unlocking or disconnecting an
unpressurized hydrogen refueling nozzle shall be less than or equal to 90 N. If the
secondary locking mechanism is a rotary type, the locking or unlocking torque shall not
exceed 1 N·m. If the secondary locking mechanism is an axial type, the locking or
unlocking force shall not exceed 90 N.
5.1.9 The unlocking force or torque of type A and type B hydrogen refueling nozzles
after pressurization shall not be greater than 450 N or 5 N·m.
5.1.10 The requirements for hydrogen refueling nozzles, according to different types,
are as follows.
a) Type A: This type of hydrogen refueling nozzle is suitable for devices, where the
filling hose is under high pressure after the hydrogen refueling machine is shut
down. Hydrogenation can only be carried out, when the hydrogen refueling
nozzle is correctly connected to the receptacle. This type of hydrogen refueling
nozzle is equipped with one or more integrated valves. Before removing the
hydrogen refueling nozzle, stop hydrogenation by closing the valve and then open
the drain line, to ensure that the gas between the hydrogen refueling nozzle's stop
5.2.5.1 Leakage
Carry out the test according to the method specified in 6.7.1. There shall be no bubbles
in the hydrogen refueling nozzle and connector within 1 minute, OR the leakage rate
shall be less than 20 cm3/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 connector can be connected and disconnected normally, meanwhile the
refueling function is normal.
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. When
connected to the wear mode test equipment for testing, the hydrogen refueling nozzle
meets the requirements of 5.2.1.
Before and after the test, the hydrogen refueling nozzle complies 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 15000 times and check their wear. The wear and tear of test
equipment shall comply with the requirements of Appendix D.
5.2.6.2 Connectors
Connectors are designed to withstand the highest airflow conditions. After completing
the test according to the method specified in 6.8.2, the hydrogen refueling nozzle shall
be tested according to the method specified in 6.3a) and meet the requirements of 5.2.1.
5.2.7 Aging resistance
5.2.7.1 Oxygen aging resistance
Conduct an oxygen aging resistance test on the hy...
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