ISO 17268:2020 pdf download – Gaseous hydrogen land vehicle refuelling connection devices.
4.3 Nozzles and receptacles shall be well fitted and manufactured in accordance with good engineering practice. 4.4 Nozzles and receptacles shall be a) designed to minimise the possibility of incorrect assembly; b) designed to be secure against displacement, distortion, warping or other damage; c) constructed to maintain operational integrity under normal and reasonable conditions of handling and usage; and d) designed with no self-evident means of defeating the safety features. 4.5 Nozzles and receptacles shall be manufactured of materials suitable and compatible for use with compressed hydrogen at the pressure and the temperature ranges to which they will be subjected as specified in 3.2, 5.8 and 6.9. Materials used in the construction of nozzles, receptacles and protective caps shall be non-sparking or spark-reducing. All pressure bearing and wetted components shall also be made from material that is compatible with deionised water. Non-metallic material compatibility shall be documented by the component manufacturer or an independent third party. 4.6 The nozzle shall be connected to or disconnected from the receptacle without the use of tools. 4.7 The H11 and H25 receptacles shall be mounted on the vehicle in compliance with ISO 15501-1. All other receptacles shall be mounted on the vehicle in compliance with the envelope requirements specified in Annex A. 4.8 Protective caps are intended to protect the receptacle from foreign debris and shall not hold pressure. Resistance shall be appropriate to prevent inadvertent dislodging. All protective caps shall have a retainer to attach them to the receptacle or vehicle. 4.9 Communications hardware which is supplied by the manufacturer and permanently integrated into the nozzle shall be attached to the nozzle and subjected to all of the nozzle tests. The communications hardware shall operate correctly upon completion of the all type and quality testing.
5 Nozzles 5.1 Nozzles shall be in accordance with the dimensional requirements of 6.1 to ensure proper interchangeability. Nozzles shall couple with receptacles of equal or higher nominal working pressures and they shall be designed so that they will not couple with receptacles of lower nominal working pressures. The nozzle shall extend to within 1 mm of the stop ring for all nominal working pressures. Nozzles shall be designed so that they will not couple with gaseous fuelled vehicles other than GHLV. 5.2 Nozzles shall be one of the following three types. a) TYPE A — A nozzle for use with dispensing hoses that may remain fully pressurized at dispenser shutdown. The nozzle shall not allow gas to flow until a positive connection has been achieved. The nozzle shall be equipped with an integral valve or valves, incorporating an operating mechanism which first stops the supply of gas and safely vents the trapped gas before allowing the disconnection of the nozzle from the receptacle.