前言:这是CSA/ANSI HPRD 1《压缩氢车辆（HGV）燃料容器用热激活减压装置》的第二版。它取代了2013年出版的前一版。本版本的主要变化包括:a）附加定义；b） 先导式泄压装置的要求；andc）额外的设计鉴定试验。本出版物代表了用于压缩氢车辆燃料容器的热激活泄压装置的安全操作、坚固耐用的结构和性能测试标准，用于在下文给出的限制范围内和本标准的范围内，车载存储用于车辆运行的压缩氢。本标准基于成熟的工程原理、研究以及天然气公用事业公司、制造商、用户和其他具有专业经验的人的综合专业知识。 本标准中的任何内容均不得以任何方式被视为表明质量指标超出了其包含的规定。其目的是允许符合可能超过本文规定的产品。在准备过程中，充分认识到通过巧妙设计进行改进的可能性。本标准可能会被修订，因为进一步的经验和调查可能表明它是必要和可取的。本标准不适用于符合联邦机动车安全标准（FMVSS）或加拿大天然气动力汽车机动车安全标准（CMVSS）的机动车原始制造过程中纳入的燃油系统部件。CSA集团承认，该标准的制定部分是由于加拿大自然资源部的财政支持。 本标准的制定符合加拿大标准委员会对加拿大国家标准的要求。CSA集团已将其作为加拿大国家标准发布。本标准已被美国国家标准协会（ANSI）批准为美国国家标准。范围:1.1概述本标准规定了用于符合CSA/ANSI HGV 2、CSA B51第2部分或SAE J2579的燃料容器的泄压装置的最低要求。设计符合本标准的泄压装置拟与符合SAE J2719或ISO 14687的氢燃料一起使用。泄压装置可以采用符合本标准要求的任何设计或制造方法。泄压装置的构造，无论是否在本标准中有明确规定，均应符合安全、性能和耐久性的合理概念。 本标准不适用于重新密封、重新密封或压力激活装置。1.2适用于氢燃料车辆和氢燃料子系统的相关文件包括SAE J2578和SAE J2579。其他法规、标准或规范可能允许或要求使用经认证符合本标准的泄压装置。超出本标准范围的其他服务条件或要求由标准制定机构或具有管辖权的机构负责。1.3资料性附录A提供了PRD1/HPRD1天然气车辆（NGV）和氢车辆燃料容器减压装置标准联合技术咨询小组在制定本标准期间确定的推荐燃料容器、燃料储存子系统和车辆级别要求的资料性记录。 由于本标准包含组件级要求，这些建议不在本标准的范围内。附录A声明旨在作为建议，供制定这些子系统和车辆级标准的组织和委员会考虑纳入。1.4本标准中的术语“应”用于表示要求，即用户为遵守本标准而有义务满足的规定；“应该”用于表示建议或建议但不需要的建议；“可”用于表示一个选项或在标准范围内允许的选项。注释随附条款不包括要求或替代要求；随附条款的注释的目的是将解释性或信息性材料与文本分开。 表和图的注释被视为表或图的一部分，可以作为要求编写。附件被指定为规范性（强制性）或信息性（非强制性）以定义其应用。1.5单位国际单位制给出的数值为本标准中的记录单位。括号中给出的值仅供参考和比较。

Preface:This is the second edition of CSA/ANSI HPRD 1,Thermally activated pressure relief devices for compressed hydrogen vehicle (HGV) fuel containers. It supersedes the previous edition published in 2013. The major changes to this edition include the following:a) additional definitions;b) requirements for pilot activated pressure relief devices; andc) additional design qualification tests.This publication represents a standard for safe operation, substantial and durable construction and performance testing of thermally activated pressure relief devices for compressed hydrogen vehicle fuel containers, for the on-board storage of compressed hydrogen for vehicle operation within limitations given below and in the scope of this Standard.This Standard is based on proven engineering principles, research, and the combined expertise of gas utilities, manufacturers, users, and others having specialized experience.Nothing in this Standard is to be considered in any way as indicating a measure of quality beyond compliance with the provisions it contains. It is designed to allow compliance of products that might exceed that specified in the provisions herein. In its preparation, full recognition has been given to possibilities of improvement through ingenuity of design. This Standard is subject to revision as further experience and investigation might show it is necessary and desirable.This Standard does not apply to fuel system components that will be incorporated during original manufacture of motor vehicles which comply withFederal Motor Vehicle Safety Standards (FMVSS)orCanadian Motor Vehicle Safety Standards (CMVSS)for Natural Gas Powered Vehicles.CSA Group acknowledges that the development of this Standard was made possible, in part, by the financial support of Natural Resources Canada.This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.This Standard has been approved by the American National Standards Institute (ANSI) as an American National Standard.Scope:1.1 GeneralThis Standard establishes minimum requirements for pressure relief devices intended for use on fuel containers that comply with CSA/ANSI HGV 2, CSA B51, Part 2, or SAE J2579.Pressure relief devices designed to comply with this Standard are intended to be used with hydrogen fuel complying with SAE J2719 or ISO 14687.Pressure relief devices may be of any design or manufacturing method that meets the requirements of this Standard.The construction of pressure relief devices, whether specifically covered in this Standard or not, are to be in accordance with reasonable concepts of safety, performance, and durability.This Standard does not apply to reseating, resealing, or pressure activated devices.1.2 Relevant documentsDocuments that apply to hydrogen fuel vehicles and hydrogen fuel subsystems include SAE J2578 and SAE J2579.Other regulations, standards, or codes might 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 Standard are the responsibility of those standards development organizations or the authority having jurisdiction.1.3 Informative annexAnnex 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 Standard.Annex A statements are intended as recommendations for consideration of inclusion by the organizations and committees developing these subsystem and vehicle level standards.1.4 TerminologyIn this Standard, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; "should" is used to express a recommendation or that which is advised but not required; and "may" is used to express an option or that which is permissible within the limits of the Standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.1.5 UnitsThe values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.