ISO 17268-2020 pdf free download – Gaseous hydrogen land vehicle refuelling connection devices.
4 General construction requirements
4.1 Nozzles and receptacles shall be designed in accordance with reasonable concepts of safety,durability and maintainability.
4.2 Nozzles and receptacles designed and tested in accordance with this document shall
a) prevent hydrogen fuelled vehicles from being filled by fuelling stations with working pressures
and/or flow rates higher than the design values specified for the vehicle;
b) prevent hydrogen fuelled vehicles from being filled by other compressed gas fuelling stations, for
example, natural gas and hydrogen-natural gas blends; and
c) prevent other gaseous fuelled vehicles from being filled by hydrogen fuelling stations.
4.3 Nozzles and receptacles shall be well fitted and manufactured in accordance with good engineeringpractice.
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 withcompressed hydrogen at the pressure and the temperature ranges to which they will be subjected asspecified in 3.2,5.8 and 6.9.Materials used in the construction of nozzles, receptacles and protectivecaps shall be non-sparking or spark-reducing. All pressure bearing and wetted components shall also bemade from material that is compatible with deionised water. Non-metallic material compatibility shall bedocumented by the component manufacturer or an independent third party.
4.6The nozzle shall be connected to or disconnected from the receptacle without the use of tools.
4.7The 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 requirementsspecified in Annex A.
4.8 Protective caps are intended to protect the receptacle from foreign debris and shall not holdpressure. Resistance shall be appropriate to prevent inadvertent dislodging.All protective caps shallhave a retainer to attach them to the receptacle or vehicle.
4.9 Communications hardware which is supplied by the manufacturer and permanently integrated intothe nozzle shall be attached to the nozzle and subjected to all of the nozzle tests. The communicationshardware shall operate correctly upon completion of the all type and quality testing.
4.10 Nozzles and receptacles defined in this document can be used to fuel different types of GHLVs. The refuelling stations for these vehicles may have significantly different process limits and refuelling protocols. The nozzle and receptacle alone may not ensure that a GHLV cannot refuel at an incompatible station. If this occurs, the GHLV may be exposed to conditions outside of its intended limits, such as fuel container overheating. If this is a potential problem, the user and station manufacturer should develop additional controls to mitigate this risk.
4.11 As stated in ECE/TRANS/180/Add. 13 Global Technical Regulation No. 13 (Global technical regulation on hydrogen and fuel cell vehicles — 19 July 2013), “Assurance of capability to sustain multiple occurrences of over-pressurization due to fuelling station failure is provided by the requirement to demonstrate absence of leak in 10 exposures to 150 per cent NWP fuelling.”ISO 17268 pdf download.