CSA/AM ANSI HPRD 1-2013

Abstract

This standard establishes minimum requirements for pressure relief devices intended for use on fuel containers that comply with <em>CSA B51, Part 2 Boiler, Pressure Vessel and Pressure Piping Code or</em> SAE J2579, <em>Technical Information Report for Fuel Systems in Fuel Cell and Other Hydrogen Vehicles</em>. <br>Pressure relief devices designed to comply with this standard are intended to be used with hydrogen fuel complying with SAE J2719 <em>Hydrogen Fuel Quality for Fuel Cell Vehicles</em>, or ISO 14687 <em>Hydrogen Fuel- Product Specification</em>. <br>Pressure relief devices may be of any design or manufacturing method that meets the requirements of this standard. <br>The construction of pressure relief devices, whether specifically covered in this standard or not, shall be in accordance with reasonable concepts of safety, performance and durability. <br>This standard does not apply to reseating resealing or pressure activated devices. <br><strong>Relevant documents</strong> <br>Documents which apply to hydrogen fuel vehicles and hydrogen fuel subsystems include SAE J2578, <em>Recommended Practice for General Fuel Cell Vehicle Safety</em> and SAE J2579, <em>Technical Information Report for Fuel Systems in Fuel Cell and Other Hydrogen Vehicles</em>. <br>Other regulations, standards, or codes may permit or require the use of pressure relief devices certified to comply with this standard. Additional service conditions or requirements beyond the scope of this document are the responsibility of those standards development organizations or the authority having jurisdiction. <br><strong>Informative annex</strong> <br>Annex A presents an informative record of the recommended fuel container, fuel storage subsystem, and vehicle level requirements that were identified by the PRD1/HPRD1 Joint Technical Advisory Group on Standards for Pressure Relief Devices for Natural Gas Vehicles (NGV) and Hydrogen Vehicle Fuel Containers during the development of this standard. As this standard contains component level requirements, these recommendations are outside the scope of this document. <br>Annex A statements are intended as recommendations for consideration of inclusion by the organizations and committees developing these sub system and vehicle level standards. <br><strong>Notes</strong> <br>Fuel containers may accidentally be exposed to fire or elevated temperature. These conditions may act to increase the contained pressure or to degrade the structural materials, depending on the container type and materials of construction. A pressure relief device will provide a means to vent the fuel container under these conditions. <br>A specific pressure relief device may not be suitable for all container types, sizes or installations. Fuel container or installation standards may require that a pressure relief device be tested in conjunction with other components. <br>CGA S1.1 <em>Pressure Relief Device Standards Part 1- Cylinders for Compressed gases</em> states: "relief devices may not prevent burst of a cylinder under all conditions of fire exposure. When the heat transferred to the cylinder is localized, intensive, and remote to the relief device, or when the fire builds rapidly, such as in an explosion, and is of very high intensity, the cylinder can weaken sufficiently to rupture before the relief device operates, or while it is operating". <br>This standard contains SI (Metric) corresponding to the yard/pound quantities, the purpose being to allow the standard to be used in SI (Metric) units. (<em>Standard for use of the International System of Units (SI): The Modern Metric System, IEEE/ASTM SI I0</em> or <em>Metric Practice Guide, CAN/CSA Z234.1</em> are used as a guide in making metric conversion from yard/pound quantities.) If a value for a measurement and a corresponding value in other units are stated, the first stated value is to be regarded as the requirement. The given corresponding value may be approximate. If a value for a measurement and a corresponding value in other units are both specified as a quoted marking requirement, the first stated unit, or both shall be provided.