Document ID: chunk:federal_register_of_legislation:F2023L01530:body:0:p7
Version: federal_register_of_legislation:F2023L01530
Segment Type: other
Provision Reference: 
Character Range: 20849–23980

hood, floor, side walls, being separated from the passenger compartment by the front bulkhead or the rear bulkhead.
         2.14. "Manufacturer" means the person or body responsible to the approval authority for all aspects of the type approval process and for ensuring conformity of production. It is not essential that the person or body is directly involved in all stages of the construction of the vehicle, system or component which is the subject of the approval process.
         2.15. "Maximum allowable working pressure (MAWP)" means the highest gauge pressure to which a pressure container or storage system is permitted to operate under normal operating conditions.
         2.16. "Maximum fuelling pressure (MFP)" means the maximum pressure applied to compressed system during fuelling. The maximum fuelling pressure is 125 per cent of the Nominal Working Pressure.
         2.17. "Nominal working pressure (NWP)" means the gauge pressure that characterizes typical operation of a system. For compressed hydrogen gas containers, NWP is the settled pressure of compressed gas in fully fuelled container or storage system at a uniform temperature of 15 °C.
         2.18. "Pressure relief device (PRD)" means a device that, when activated under specified performance conditions, is used to release hydrogen from a pressurized system and thereby prevent failure of the system.
         2.19. "Rupture" or "burst" both mean to come apart suddenly and violently, break open or fly into pieces due to the force of internal pressure.
         2.20. "Safety relief valve" means a pressure relief device that opens at a preset pressure level and can re-close.
         2.21. "Service life" (of a compressed hydrogen container) means the time frame during which service (usage) is authorized.
         2.22. "Shut-off valve" means a valve between the storage container and the vehicle fuel system that can be automatically activated; which defaults to the "closed" position when not connected to a power source.
         2.23. "Single failure" means a failure caused by a single event, including any consequential failures resulting from this failure.
         2.24. "Thermally-activated pressure relief device (TPRD)" means a non- reclosing PRD that is activated by temperature to open and release hydrogen gas.
         2.25. "Type of hydrogen storage system" means an assembly of components which do not differ significantly in such essential aspects as:
              (a) The manufacturer's trade name or mark;
              (b) The state of stored hydrogen fuel; compressed gas;
              (c) The nominal working pressure (NWP);
              (d) The structure, materials, capacity and physical dimensions of the container; and
              (e) The structure, materials and essential characteristics of TPRD, check valve and shut-off valve, if any.
         2.26. "Type of specific components of hydrogen storage system" means a component or an assembly of components which do not differ significantly in such essential aspects as:
              (a) The manufacturer's trade name or mark;
              (b) The state of