Codeofchina.com Inc. is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the Ministry of Industry and Information Technology of the People's Republic of China.
This standard is under the jurisdiction of National Technical Committee on Automobiles of Standardization Administration of China (SAC/TC 114).
Fuel Cell Electric Vehicles
—Hydrogen Refuelling Nozzle
1 Scope
This standard specifies definitions, requirements and test methods for hydrogen refuelling nozzle of fuel cell electric vehicle (“nozzle” for short).
This standard is applicable to hydrogen refuelling nozzle of fuel cell electric vehicle using compressed hydrogen as working medium at working pressure not exceeding 35 MPa and operating ambient temperature between -40℃ and 60℃.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 10125 Corrosion Tests in Artificial Atmospheres - Salt Spray Tests
GB/T 24548 Fuel Cell Electric Vehicles - Terminology
GB/T 24549-2009 Fuel Cell Electric Vehicles - Safety Requirements
GB/T 26779-2011 Fuel Cell Electric Vehicles - Refuelling Receptacle
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 24548 and GB/T 26779 and the following apply.
3.1
hydrogen refuelling nozzle
refuelling interface installed at the end of hydrogen refuelling hose of hydrogen dispenser to connect hydrogen dispenser and vehicle.
3.2
receptacle
assembly of parts connecting vehicle and hydrogen refuelling nozzle during refuelling.
3.3
connector
assembly of nozzle and receptacle for compressed hydrogen vehicle or storage system, which can be handled quickly.
3.4
compressed hydrogen dispenser for vehicles
special equipment filling compressed hydrogen fuel for vehicle and equipped with measuring and valuation device.
3.5
cycle
whole process of connecting hydrogen refuelling nozzle with receptacle, pressurizing to design pressure, releasing pressure and then disconnecting them.
4 Requirements
4.1 General requirements
4.1.1 Type and dimension of receptacle shall dimensionally fit to the receptacle required in GB/T 26779-2011, 5.1.1. The hydrogen refuelling nozzle shall be such designed to ensure that it can only be connected with the receptacle with an equal or higher operating pressure class and to avoid connecting with the receptacle with a lower operating pressure class.
4.1.2 The hydrogen refuelling nozzle shall meet the relevant requirements of GB/T 24549-2009, 4.2.2.
4.1.3 The material of hydrogen refuelling nozzle contacting with hydrogen shall be compatible with hydrogen and hydrogen embrittlement will not occur within the designed useful life period. Misfiring material shall be adopted for hydrogen refuelling nozzle.
4.1.4 The hydrogen refuelling nozzle is required as follows depending on the types:
a) Type A: This type is applicable to the device when the hydrogen dispenser is closed, refuelling hose is at high pressure. Hydrogen refuelling can be carried out only if hydrogen refuelling nozzle is correctly connected with the receptacle. One or more integrated valves are equipped for stopping the hydrogen refuelling when the valve(s) is (are) closed and emptying the gas in the nozzle head safely before removing the nozzle. The operating system shall ensure that the emptying pipe has been opened before the emptying operation and the gas between the nozzle stop valve and receptacle needle valve has been discharged safely before removing the nozzle.
b) Type B: This type is applicable to the device when the hydrogen dispenser is closed, refuelling hose is at high pressure. An independent three-way valve is directly or indirectly installed before the air inlet of the nozzle to empty residual gas within the nozzle head safely before removing the nozzle. Hydrogen refuelling can be carried out only if hydrogen refuelling nozzle is correctly connected with the receptacle. Degassing shall be carried out before removing the nozzle. The outside three-way valve shall be marked clearly to indicate the position of opening/closing and degassing.
c) Type C: This type is applicable to the device when the hydrogen dispenser is closed, the refuelling hose is pressure released to be less than or equal to 0.5 MPa. Hydrogen refuelling can be carried out only if hydrogen refuelling nozzle is correctly connected with the receptacle. The hydrogen dispenser controls the relevant functions by receiving correct connect signal from hydrogen refuelling nozzle.
4.1.5 It is not allowable to connect hydrogen refuelling nozzle with hydrogen dispenser hose only by threading sealing.
4.1.6 Type A nozzle shall be provided with an integrated or permanent identification to indicate the "opening" and "closing" direction when starting.
4.1.7 The nozzle shall be provided with protective measures like filter to prevent upstream solid matter from entering.
4.1.8 The nozzle shall be able to work normally at ambient temperature of -40℃~60℃ and hydrogen temperature of -40℃~85℃.
4.1.9 The nozzle shall not open check valve of receptacle mechanically.
4.2 Performance requirements
4.2.1 Air-tightness
Air-tightness test is carried out according to the method specified in 5.3, during which the leakage rate of unbound nozzle and connector shall be both less than 20 cm3/h at 20℃ and 101 MPa, When the nozzle is connected with receptacle, the leakage rate is less than 20 cm3/h at 20℃ and 101 MPa.
4.2.2 Drop
When tested according to the method specified in 5.4, the nozzle shall be normally connected to receptacle and meet the requirements of 4.2.1 and 4.2.9 in this standard.
4.2.3 Valve operation handle
When tested according to the method specified in 5.5, if the nozzle is equipped with the valve operation handle, the farthest point from revolving spindle shall be able to withstand a force of 200N, unlikely leading to damage of the handle or opening.
4.2.4 Abnormal load
When tested according to the method specified in 5.6, the parts connecting nozzle and receptacle shall be able to withstand a force of 670 N from any direction during the operation without twisting, damage or leakage.
4.2.5 Swing /twisting
When tested according to the method specified in 5.7, receptacle and connecting parts shall not be loosened or damaged.
4.2.6 Connection component torque
When tested according to the method specified in 5.8, receptacle and connection component shall be able to withstand a torsional force 1.5 times the mounting torque and no damage happens.
4.2.7 Low temperature and high temperature
When tested according to the method specified in 5.9, the result shall be in accordance with 4.2.1.
4.2.8 Life span and maintainability
4.2.8.1 Cycle life
a) Hydrogen refuelling nozzle: it shall be able to withstand 100 000 cycles. After the test, the nozzle shall meet requirements of 4.2.1 and 4.2.9 in this standard. Its locking device shall be checked under normal removal pressure to ensure it can be correctly applied onto the nozzle.
b) Connector: the connector between nozzle and receptacle shall be able to withstand the highest air flow condition. After the test, nozzle or receptacle shall be in accordance with 4.2.1.
4.2.8.2 Oxygen aging resistance test
Sealing material is subjected to oxygen aging resistance test according to the method specified in 5.10.2 and fracture or visible damage shall not be found.
4.2.8.3 Immersion of nonmetallic material
Perform an immersion test for inside nonmetallic material of the nozzle which directly contacts with hydrogen according to the method specified in 5.10.3 and the sample expansion shall not exceed 25 %, contraction not exceed 10% and weight loss not exceed 10%.
Foreword i 1 Scope 2 Normative References 3 Terms and Definitions 4 Requirements 5 Test Methods
Codeofchina.com Inc. is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the Ministry of Industry and Information Technology of the People's Republic of China.
This standard is under the jurisdiction of National Technical Committee on Automobiles of Standardization Administration of China (SAC/TC 114).
Fuel Cell Electric Vehicles
—Hydrogen Refuelling Nozzle
1 Scope
This standard specifies definitions, requirements and test methods for hydrogen refuelling nozzle of fuel cell electric vehicle (“nozzle” for short).
This standard is applicable to hydrogen refuelling nozzle of fuel cell electric vehicle using compressed hydrogen as working medium at working pressure not exceeding 35 MPa and operating ambient temperature between -40℃ and 60℃.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 10125 Corrosion Tests in Artificial Atmospheres - Salt Spray Tests
GB/T 24548 Fuel Cell Electric Vehicles - Terminology
GB/T 24549-2009 Fuel Cell Electric Vehicles - Safety Requirements
GB/T 26779-2011 Fuel Cell Electric Vehicles - Refuelling Receptacle
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 24548 and GB/T 26779 and the following apply.
3.1
hydrogen refuelling nozzle
refuelling interface installed at the end of hydrogen refuelling hose of hydrogen dispenser to connect hydrogen dispenser and vehicle.
3.2
receptacle
assembly of parts connecting vehicle and hydrogen refuelling nozzle during refuelling.
3.3
connector
assembly of nozzle and receptacle for compressed hydrogen vehicle or storage system, which can be handled quickly.
3.4
compressed hydrogen dispenser for vehicles
special equipment filling compressed hydrogen fuel for vehicle and equipped with measuring and valuation device.
3.5
cycle
whole process of connecting hydrogen refuelling nozzle with receptacle, pressurizing to design pressure, releasing pressure and then disconnecting them.
4 Requirements
4.1 General requirements
4.1.1 Type and dimension of receptacle shall dimensionally fit to the receptacle required in GB/T 26779-2011, 5.1.1. The hydrogen refuelling nozzle shall be such designed to ensure that it can only be connected with the receptacle with an equal or higher operating pressure class and to avoid connecting with the receptacle with a lower operating pressure class.
4.1.2 The hydrogen refuelling nozzle shall meet the relevant requirements of GB/T 24549-2009, 4.2.2.
4.1.3 The material of hydrogen refuelling nozzle contacting with hydrogen shall be compatible with hydrogen and hydrogen embrittlement will not occur within the designed useful life period. Misfiring material shall be adopted for hydrogen refuelling nozzle.
4.1.4 The hydrogen refuelling nozzle is required as follows depending on the types:
a) Type A: This type is applicable to the device when the hydrogen dispenser is closed, refuelling hose is at high pressure. Hydrogen refuelling can be carried out only if hydrogen refuelling nozzle is correctly connected with the receptacle. One or more integrated valves are equipped for stopping the hydrogen refuelling when the valve(s) is (are) closed and emptying the gas in the nozzle head safely before removing the nozzle. The operating system shall ensure that the emptying pipe has been opened before the emptying operation and the gas between the nozzle stop valve and receptacle needle valve has been discharged safely before removing the nozzle.
b) Type B: This type is applicable to the device when the hydrogen dispenser is closed, refuelling hose is at high pressure. An independent three-way valve is directly or indirectly installed before the air inlet of the nozzle to empty residual gas within the nozzle head safely before removing the nozzle. Hydrogen refuelling can be carried out only if hydrogen refuelling nozzle is correctly connected with the receptacle. Degassing shall be carried out before removing the nozzle. The outside three-way valve shall be marked clearly to indicate the position of opening/closing and degassing.
c) Type C: This type is applicable to the device when the hydrogen dispenser is closed, the refuelling hose is pressure released to be less than or equal to 0.5 MPa. Hydrogen refuelling can be carried out only if hydrogen refuelling nozzle is correctly connected with the receptacle. The hydrogen dispenser controls the relevant functions by receiving correct connect signal from hydrogen refuelling nozzle.
4.1.5 It is not allowable to connect hydrogen refuelling nozzle with hydrogen dispenser hose only by threading sealing.
4.1.6 Type A nozzle shall be provided with an integrated or permanent identification to indicate the "opening" and "closing" direction when starting.
4.1.7 The nozzle shall be provided with protective measures like filter to prevent upstream solid matter from entering.
4.1.8 The nozzle shall be able to work normally at ambient temperature of -40℃~60℃ and hydrogen temperature of -40℃~85℃.
4.1.9 The nozzle shall not open check valve of receptacle mechanically.
4.2 Performance requirements
4.2.1 Air-tightness
Air-tightness test is carried out according to the method specified in 5.3, during which the leakage rate of unbound nozzle and connector shall be both less than 20 cm3/h at 20℃ and 101 MPa, When the nozzle is connected with receptacle, the leakage rate is less than 20 cm3/h at 20℃ and 101 MPa.
4.2.2 Drop
When tested according to the method specified in 5.4, the nozzle shall be normally connected to receptacle and meet the requirements of 4.2.1 and 4.2.9 in this standard.
4.2.3 Valve operation handle
When tested according to the method specified in 5.5, if the nozzle is equipped with the valve operation handle, the farthest point from revolving spindle shall be able to withstand a force of 200N, unlikely leading to damage of the handle or opening.
4.2.4 Abnormal load
When tested according to the method specified in 5.6, the parts connecting nozzle and receptacle shall be able to withstand a force of 670 N from any direction during the operation without twisting, damage or leakage.
4.2.5 Swing /twisting
When tested according to the method specified in 5.7, receptacle and connecting parts shall not be loosened or damaged.
4.2.6 Connection component torque
When tested according to the method specified in 5.8, receptacle and connection component shall be able to withstand a torsional force 1.5 times the mounting torque and no damage happens.
4.2.7 Low temperature and high temperature
When tested according to the method specified in 5.9, the result shall be in accordance with 4.2.1.
4.2.8 Life span and maintainability
4.2.8.1 Cycle life
a) Hydrogen refuelling nozzle: it shall be able to withstand 100 000 cycles. After the test, the nozzle shall meet requirements of 4.2.1 and 4.2.9 in this standard. Its locking device shall be checked under normal removal pressure to ensure it can be correctly applied onto the nozzle.
b) Connector: the connector between nozzle and receptacle shall be able to withstand the highest air flow condition. After the test, nozzle or receptacle shall be in accordance with 4.2.1.
4.2.8.2 Oxygen aging resistance test
Sealing material is subjected to oxygen aging resistance test according to the method specified in 5.10.2 and fracture or visible damage shall not be found.
4.2.8.3 Immersion of nonmetallic material
Perform an immersion test for inside nonmetallic material of the nozzle which directly contacts with hydrogen according to the method specified in 5.10.3 and the sample expansion shall not exceed 25 %, contraction not exceed 10% and weight loss not exceed 10%.
Contents of GB/T 34425-2017
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Requirements
5 Test Methods
