BS ISO 23273:2013 pdf free download.Fuel cell road vehicles — Safety specifications — Protection against hydrogen hazards for vehicles fuelled with compressed hydrogen. 5.2.4Hydrogen shut-off system The fuel system and its control shall provide a means to close the main hydrogen shut-off valve andthereby prevent unwanted discharge of hydrogen or other hazards arising from single-point failures, asper Iso 6469-2. 5.3 Location and installation of components All components and interconnecting piping and wiring shall be securely mounted or supported in thevehicle to minimize damage and prevent leakage and/or malfunction. Components shall be located within the vehicle to reduce the possibility of accidental damage, unless thecomponents are adequately protected and no part of the componentlies outside ofthe protective structure.Fuel pipes shall be locatedand protected in such a way that no damage can be caused by vehicle vibrationsunder normal operational conditions as specified by the vehicle manufacturer. 5.4Discharges The vehicle design for all fuel system exhausts, purges, vents, and other discharges that occur duringnormal operation of the vehicle shall prevent hydrogen-related hazardous conditions. All normaloperating modes including start, run, stop, and off (parked) should be considered in these requirements.Discharges into all vehicle compartments under normal operation and single-failure conditions shall notlead to any hazardous conditions. In areas of contemplated use, such as outdoors, mechanically ventilated buildings and structures, andnon-mechanically ventilated residential garages, legal requirements shall be met.Normal dischargesfrom the vehicle to the outside shall be non-flammable. NOTE Guidance relative to evaluating vehicles for commonly contemplated situations such as drivingoutdoors, idling the vehicle in commercial buildings, and parking in a residential garage is provided in SAEJ2578.Discharges from the PRD shall be vented to the outside of the vehicle, and shall be protected as well asall associated piping and outlet, such that functionality is not compromised due to flow restrictions.The release of hydrogen from traction batteries shall not lead to any hazardous conditions. 6 Test methods for determining flammability around the vehicle from fuel dis-charges Tests shall be performed according to applicable national or International Standards or legalrequirements.Otherwise, test methods shall be specified by the vehicle manufacturer. 7 Complementary or alternative approach to verify hydrogen-related safetyrequirements 7.1General Complementary to the requirements in Clause 5, protection for persons and the environment inside andoutside the vehicle against hydrogen-related hazards may be achieved by the following procedure.Thisprocedure may also be applied instead of the requirements in Clause 5, resulting in requirements morespecific to the conditions of a given...
Download Address
Download