GB/T 30718-2014Compressed hydrogen surface vehicle refueling connection devices (English PDF)

3.1 dry air

Air with a maximum dew point of -40°C.

3.2 connector

A receptacle and nozzle assembly that can be quickly loaded and unloaded to refuel

compressed hydrogen vehicles or storage systems.

3.3 cycle

An entire process that includes the connection between the nozzle and the receptacle,

pressurizing to the design pressure, pressure relief and disconnection.

3.4 design pressure

The maximum pressure that the component can withstand in actual work.

3.5 dry hydrogen

Hydrogen that meets or exceeds the quality requirements of ISO 14687-2.

3.6 dry helium

Helium that the dew point is just right to prevent condensation during testing, and the

purity is greater than 99%.

3.7 leak test gas

The gas used for leak testing can be dry hydrogen, dry helium, or nitrogen containing

more than 10% hydrogen or helium.

4.1 The nozzle and the receptacle of the compressed hydrogen surface vehicle designed

in accordance with this Standard shall meet safety, durability and maintainability

requirements.

4.2 The nozzle and the receptacle of the compressed hydrogen surface vehicle shall

have good matching and be manufactured according to engineering application

requirements.

4.3 The design of the nozzle and the receptacle of the compressed hydrogen surface

vehicle shall.

4.4 The materials used for the nozzle and the receptacle of the compressed hydrogen

surface vehicle shall be compatible with compressed hydrogen within the design

pressure and temperature range (see 3.4, 5.9 and 7.7).

4.5 Tools shall not be used when connecting and disconnecting the connector of the

compressed hydrogen surface vehicle.

4.6 The receptacle of the compressed hydrogen surface vehicle shall be installed on the

vehicle in accordance with the requirements of GB/T 24549-2009.

5.1 Nozzles shall comply with the dimensional requirements of Chapter 6.The design

of the nozzle shall ensure that it can only be used in connection with the receptacle of

a higher working pressure level. Avoid connecting to receptacles with lower operating

pressure levels.

5.2 The nozzle shall be one of the three types described below.

5.6 The installation of the nozzle shall meet the requirements of ISO 15501-2.

5.7 The nozzle shall have filters and other protective measures to prevent upstream solid

matter from entering.

5.8 When the pressure inside the nozzle head is greater than 0.7 MPa, the nozzle shall

not be able to be removed.

5.9 The nozzle shall work normally in the ambient temperature range of -40°C~60°C

and the hydrogen temperature range of -40°C~85°C.

5.10 The nozzle shall not mechanically open the receptacle check valve.

7.1 Failure in any test of the receptacle and nozzle samples can be attributed to the

failure of the receptacle design.

In addition, according to the maintenance methods specified by the manufacturer, the

service life of the receptacle shall be 15 years or 30000 cycles.

7.3 The receptacle shall be equipped with a built-in one-way valve to prevent gas

leakage. The one-way valve shall be non-contact and can only be opened by a pressure

difference.

7.4 The connection between the receptacle and the vehicle fuel system cannot be

threaded and sealed.

7.6 The receptacle shall be able to be securely mounted on the vehicle and comply with

the abnormal load test requirements of 10.7.

7.7 The working temperature range of the receptacle is -40°C~60°C.

9.1 The marks on the receptacle and nozzle shall be clear and easy to understand.

Permanently marked nameplate shall be mechanically attached to the part.

9.2 The nozzle and air receptacle shall have the following information.

9.3 All components shall be marked in compliance with this standard. The mark can be

printed on the packaging or on the notification sheet inside the equipment shipping

package.

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