GB/T 26779-2021_English: PDF (GB/T26779-2021)
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Hydrogen fuel cell electric vehicle refueling receptacle
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GB/T 26779-2021
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GB/T 26779-2011 | English | 70 |
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[Including Amendment 2018XG1] Fuel cell electric vehicles -- Refueling receptacle
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GB/T 26779-2011
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Standard ID | GB/T 26779-2021 (GB/T26779-2021) | Description (Translated English) | Hydrogen fuel cell electric vehicle refueling receptacle | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | T47 | Classification of International Standard | 43.080.01 | Word Count Estimation | 12,171 | Date of Issue | 2021-03-09 | Date of Implementation | 2021-10-01 | Older Standard (superseded by this standard) | GB/T 26779-2011 | Drafting Organization | China Automotive Technology Research Center Co., Ltd., Shanghai Remodeling Energy Technology Co., Ltd., Tongji University, SAIC Chase Automobile Co., Ltd., Chongqing Changan New Energy Automobile Technology Co., Ltd., Xiangyang Daan Automobile Testing Center Co., Ltd., Shanghai Shunhua New Energy System Co., Ltd. , Shanghai Jie Hydrogen Technology Co., Ltd., Shanghai Motor Vehicle Testing and Certification Technology Research Center Co., Ltd., Zhejiang University, Beijing Yihuatong Technology Co., Ltd., Toyota Motor (China) Investment Co., Ltd. | Administrative Organization | National Automotive Standardization Technical Committee (SAC/TC 114) | Regulation (derived from) | National Standard Announcement No. 3 of 2021 | 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 | Standard ID | GB/T 26779-2011 (GB/T26779-2011) | Description (Translated English) | [Including Amendment 2018XG1] Fuel cell electric vehicles. Refuelling receptacle | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | T47 | Classification of International Standard | 43.080.01 | Word Count Estimation | 10,129 | Date of Issue | 2011-07-20 | Date of Implementation | 2012-01-01 | Quoted Standard | GB/T 24548; GB/T 24549-2009 | Drafting Organization | China Automotive Technology and Research Center | Administrative Organization | National Automotive Standardization Technical Committee | Regulation (derived from) | Announcement of Newly Approved National Standards No. 10 of 2011 | Issuing agency(ies) | Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China | Summary | This standard specifies the hydrogen fuel cell electric vehicles mouth definition, type, requirements, test methods, inspection rules. This standard applies to the use of compressed hydrogen as the working medium, working pressure does not exceed 35MPa, the working environment temperature -40��C ~ 60��C fuel cell electric vehicles. |
GB/T 26779-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.080.01
CCS T 47
Replacing GB/T 26779-2011
Hydrogen fuel cell electric vehicle refueling receptacle
ISSUED ON: MARCH 09, 2021
IMPLEMENTED ON: OCTOBER 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 Model ... 5
5 Requirements ... 6
5.1 General requirements... 6
5.2 Performance requirements ... 6
6 Test methods ... 8
6.1 General ... 8
6.2 Appearance and size inspection ... 8
6.3 Air tightness test ... 8
6.4 Vibration resistance test ... 8
6.5 Temperature resistance test ... 9
6.6 Durability test... 9
6.7 Oxygen aging resistance test ... 9
6.8 Ozone aging resistance test ... 9
6.9 Compatibility test ... 9
6.10 Hydrostatic pressure strength test ... 10
6.11 Salt spray corrosion resistance test ... 10
6.12 Temperature cycle resistance test ... 10
6.13 Compatibility test ... 10
7 Marks ... 11
Annex A (normative) Receptacle structure type ... 12
Annex B (informative) Antifreeze design of receptacle ... 15
Hydrogen fuel cell electric vehicle refueling receptacle
1 Scope
This Standard specifies types, marks, requirements and test methods for
hydrogen fuel cell electric vehicle refueling receptacle.
This Standard is applicable to the hydrogen fuel cell electric vehicle refueling
receptacle that uses compressed hydrogen as working medium, the rated filling
pressure does not exceed 70MPa, the working temperature is -40°C~85°C.
2 Normative references
The following referenced documents are indispensable for the application 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 10125, Corrosion tests in artificial atmospheres - Salt spray tests
GB/T 24548, Fuel cell electric vehicles - Terminology
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T
24548 as well as the followings apply.
3.1 receptacle
a component assembly connected to the hydrogenation gun on the vehicle
3.2 nominal working pressure
in the standard state, the designed rated filling pressure
4 Model
The receptacle model consists of the following four parts:
After the temperature resistance test of the check valve of receptacle is
completed, carry out the durability test according to the method specified in 6.6.
There shall be no abnormal wear after the test. And it shall meet the
requirements for air tightness in 5.2.1 and the requirements for hydrostatic
strength in 5.2.8.
5.2.5 Oxygen aging resistance
For the seals in contact with hydrogen at the receptacle, carry out the oxygen
aging test according to the method specified in 6.7. There shall be no obvious
deformation, deterioration, spots, cracks and so on.
5.2.6 Ozone aging resistance
For the seals in contact with air at the receptacle, carry out the ozone aging
resistance test according to the method specified in 6.8. There shall be no
obvious deformation, deterioration, spots, cracks and so on.
5.2.7 Compatibility
For the non-metal parts in contact with hydrogen at the receptacle, carry out
the compatibility test according to the method specified in 6.9. Its volume
expansion rate shall not be greater than 25%. The volume shrinkage rate shall
not be greater than 1%. The mass loss rate shall not be greater than 10%.
5.2.8 Hydrostatic strength
The pressure-bearing parts of the receptacle shall be subjected to the
hydrostatic strength test according to the method specified in 6.10. There shall
be no cracks or permanent deformation.
5.2.9 Salt spray corrosion resistance
Test according to the method specified in 6.11. The receptacle shall not show
signs of corrosion or peeling off the protective layer. The receptacle shall meet
the air tightness requirements specified in 5.2.1.
5.2.10 Temperature cycle resistance
Test according to the method specified in 6.12. The gas pressure in the test
shall not be lower than 70% of the nominal working pressure. After the test, the
receptacle shall meet the air tightness requirements specified in 5.2.1 and the
hydrostatic strength requirements specified in 5.2.8.
5.2.11 Compatibility
Only the receptacle with a nominal working pressure of 70MPa needs to be
tested for compatibility. Carry out the compatibility test according to the method
If the receptacle is a symmetrical structure, it can only do vibration test in one
direction. If the receptacle is not symmetrical, vibration tests shall be carried out
in two directions perpendicular to each other, in no particular order.
6.5 Temperature resistance test
The check valve of the receptacle is closed. Fill the outlet end of the receptacle
with a leak detection gas whose pressure is the nominal working pressure. Put
it in an incubator. The temperature rises from room temperature to 85°C±2°C.
Keep the temperature for 8h. Immerse in 85°C water for 1min. Record whether
there are bubbles. Keep the temperature for 0.5h after returning to room
temperature. Continue to cool down to -40°C±2°C. Keep the temperature for
8h. Immerse in the cooling liquid at -40°C for 1min. Record whether there are
bubbles.
6.6 Durability test
The durability test is carried out according to the following steps. The total
number of cycles is 15000.
a) The outlet end of the receptacle is closed. The inlet end is accessed with
high-pressure gas source. The test pressure increased from 0MPa to 1.25
times the nominal working pressure. Make the check valve open.
b) The pressure relief at the inlet end is 0MPa. Make the check valve
withstand 1.25 times the nominal working pressure and be in a closed
state. Keep the time not less than 2s. Relieve the pressure at the outlet
end to 0MPa~0.5MPa.
The check valve opens and closes once as a cycle. The opening and closing
frequency of the check valve is not higher than 15 times/min.
6.7 Oxygen aging resistance test
The seals in contact with hydrogen at the receptacle shall be placed in oxygen
at a temperature of 70°C±2°C and a pressure of 2MPa for 96h. Observe the
changing state.
6.8 Ozone aging resistance test
The seals in contact with air at the receptacle shall be placed in the air at a
temperature of 40°C±2°C and an ozone volume fraction of 5×10-7 for 120h.
Observe the changing state.
6.9 Compatibility test
After the non-metal parts in contact with hydrogen at the receptacle shall be
......
GB/T 26779-2011
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.080.01
T 47
Fuel Cell Electric Vehicles - Refuelling Receptacle
ISSUED ON. JULY 20, 2011
IMPLEMENTED ON. JANUARY 01, 2012
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 4
4 Model ... 4
5 Requirements ... 5
6 Test Methods ... 6
7 Inspection Rules ... 8
8 Marking ... 10
Annex A ... 11
Foreword
This Standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard shall be under the jurisdiction of the National Automotive Standardization
Technical Committee (SAC/TC 114).
Drafting organizations of this Standard. China Automotive Technology and Research
Center, Tsinghua University, Tongji University, Shanghai Shen-Li High Tech Co., Ltd., Pan-
Asia Technical Automotive Center Co., Ltd., CAS Dalian Institute of Chemical Physics,
Shanghai Automotive Group Co., Ltd. and FAW Technology Center.
The main drafters of this Standard. He Yuntang, Zhao Jingwei, Chen Shiquan, Hou
Yongping, Zhang Ruogu, Sun Hongfen, Hou Ming, Feng Lizhong, Sheng Yi and Zhang
Yingnan.
Fuel Cell Electric Vehicles - Refuelling Receptacle
1 Scope
This Standard specifies the definition, types, requirements, test methods and inspection
rules of the refueling receptacle of the fuel cell electric vehicles.
This Standard applies to the fuel cell electric vehicles which use compressed hydrogen as
the working medium, the working pressure does not exceed 35 MPa, and the working
environment temperature is -40°C ~ 60°C.
2 Normative References
The following documents are essential to the application of this document. For the cited
documents with dates, only the dated edition applies to this document. For undated
references, the latest edition (including all amendments) applies to this document.
GB/T 24548 Fuel Cell Electric Vehicles - Terminology
GB/T 24549-2009 Fuel Cell Electric Vehicles - Safety Requirements
3 Terms and Definitions
The following terms and definitions AND those defined in GB/T 24548 apply to this
document.
3.1
Receptacle
All of components that connect the vehicle with the hydrogenation gun, when refuelling.
4 Model
4.1 See Annex A for the basic structural type.
4.2 The model number of refuelling receptacle consists of three parts.
shall not exceed 10%.
5.2.4 Oxygen aging resistance
For non-metallic parts of the refuelling receptacle in contact with hydrogen, it shall have no
deformation, deterioration, spot or crack after the oxygen aging resistance test according
to the method prescribed in 6.6.
5.2.5 Hydrostatic strength
The pressure-bearing parts of the refuelling receptacle shall have no crack or permanent
deformation after the hydrostatic strength test according to the method prescribed in 6.7.
5.2.6 Vibration resistance
After the vibration resistance test according to the method prescribed in 6.8, none of
connecting part of the refuelling receptacle shall become loose. Its air-tightness shall meet
the requirements of 5.2.1.
5.2.7 Abnormal pressure resistance
After the abnormal pressure resistance test according to the method prescribed in 6.9,
none of connecting part of the refuelling receptacle shall become loose. Its air-tightness
shall meet the requirements of 5.2.1.
5.2.8 Durability
After the temperature resistance test of the one-way valve of the refuelling receptacle, the
durability test shall be carried out according to the method prescribed in 6.10. After the test,
there shall be no abnormal wear and tear, and it shall meet the air-tightness requirements
of 5.2.1.
6 Test Methods
1.1 General Rules
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°C ~ 35°C;
b) The test medium shall be clean, dry air or suitable inert gas.
6.1.2 Measurement parameters, units and accuracy
See Table 1 for the measurement parameters and their units, accuracy requirements.
6.7 Hydrostatic Strength Test
Seal the exit end of the refuelling receptacle, access water-pressure of 52.5 MPa, the
duration shall not be less than 1 min.
6.8 Vibration Resistance Test
Fix the test specimen securely on the vibration test stand, vibrate for 8 min at each
frequency point within 5 Hz ~ 60 Hz. The amplitudes are shown in Table 2.
Table 2 Vibration frequency ranges and amplitudes
Frequency range Amplitude
5 Hz ~ 20 Hz ≥1.5mm
20 Hz ~ 40 Hz ≥1.2mm
40 Hz ~ 60 Hz ≥1mm
During the test, vibrate once in the vertical and horizontal directions respectively. If the
refuelling receptacle is not radioactively symmetric, vibrate in two directions perpendicular
to each other.
6.9 Abnormal Pressure Resistance Test
After connecting the refuelling receptacle and hydrogenation gun, apply 670 N pressure in
any direction; meeting the requirements of 5.2.1 is deemed as qualified.
6.10 Durability Test
Connect the entrance end of the refuelling receptacle with a high-pressure gas source,
increase test pressure from 0 MPa to 43.75 MPa, make the one-way valve remain open.
Then release the pressure of the entrance end to 0 MPa, maintain the one-way valve to
withstand the pressure 43.75 MPa and on close state, maintain it for not less than 2 s;
then release the pressure of the exit end to 0 MPa, make the one-way valve open and
close periodically. It is a cycle for the one-way valve to open and close once. The frequency
of the one-way valve opening and closing shall not be higher than 15 times/min. The total
cycles of the durability test is 30,000 times. Carry out the tightness test of 6.3 immediately
after the test is completed.
7 Inspection Rules
7.1 Inspection Items
Inspection items are shown in Table 3.
7.2 Exit-Factory Inspection
Inspect appearance and tightness one by one. They are qualified if they meet the
requirements of 5.1 and 5.2.1.
7.3 Random Inspection
7.3.1 Random inspection items shall be carried out in accordance with the requirements of
Table 3.
7.3.2 The sampling specimens shall be selected from the batches which are produced
recently and qualified in exit-factory inspection. The sampling base shall not be less than
100 pcs, or it can be randomly sampled as required, the sampling number is not less than
3 pcs.
7.4 Type Inspection
In one of the cases as follows, type inspection shall be carried out in accordance with the
items provided in Table 3. The newly-designed products shall also meet the requirements
of 5.1 and pass the product design review.
a) When it is a new design or there is a significant change in design parameter, process
or material;
b) When resuming production after shutting down for more than 6 months;
c) When it continues production for a full year.
Table 3 Test items
No. Test (inspection) item name
Test (inspection)
method
Judgment
basis
Exit-factory
inspection
Random
inspection
Type
inspection
1 Visual inspection 6.2 5.1 √ √ √
2 Tightness test 6.3 5.2.1 √ √ √
3 Temperature test 6.4 5.2.2 √
4 Compatibility test 6.5 5.2.3 √
5 Oxygen aging resistance test 6.6 5.2.4 √
6 Hydrostatic strength test 6.7 5.2.5 √ √
7 Vibration resistance test 6.8 5.2.6 √
8 Abnormal pressure resistance test 6.9 5.2.7 √
9 Durability test 6.10 5.2.8 √
Note. "√" indicates it is a necessary inspection item.
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