CSA序言这是CSA/ANSI HGV 4.4《气态氢-加油站-阀门》的第二版，它采用了ISO（国际标准化组织）标准19880-3（第一版，2018-06），气态氢-加油站-第3部分:阀门，但存在北美偏差。它取代了2013年作为ANSI/CSA HGV 4.4《压缩氢气分配软管和系统的分离装置》发布的上一版本。它还取代了ANSI/CSA HGV 4.6-2013（用于气态氢车辆加油站的手动阀）和ANSI/CSA HGV 4.7-2013（用于气态氢车辆加油站的自动阀）。出版时，ISO 19880-3:2018仅提供英文版本。CSA集团将在ISO发布法文版。 本版CSA/ANSI HGV 4.4与其他北美要求一致，包括CAN/BNQ-1784-000《加拿大氢气安装规范》中引用的要求。北美偏差旨在纠正错误；andb）在适用的情况下，将ISO标准的参考替换为北美标准的参考。本标准规定了气态氢环境中使用的阀门的安全性能要求和试验方法。本标准基于工程原理、研究以及制造商、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。其设计允许产品符合本协议规定的要求。 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会表明它是必要和可取的。建议本标准的用户，其范围内的设备/产品/活动可能受到联邦、州或地方各级的监管。强烈敦促用户通过适当渠道调查这种可能性。如果与本标准发生冲突，应遵循联邦、州或地方法规。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。范围本文件提供了H70以下气态氢站所用高压气阀安全性能的要求和试验方法。本文件涵盖以下气阀:-止回阀；-溢流阀；-流量控制阀；-软管分离装置；-手动阀；-压力安全阀；-切断阀。

CSA PrefaceThis is the second edition of CSA/ANSI HGV 4.4, Gaseous hydrogen - Fuelling stations - Valves, which is an adoption, with North American deviations, of ISO (International Organization for Standardization) Standard 19880-3 (first edition, 2018-06), Gaseous hydrogen - Fuelling stations - Part 3: Valves. It supersedes the previous edition, published in 2013 as ANSI/CSA HGV 4.4, Breakaway devices for compressed hydrogen dispensing hoses and systems. It also replaces ANSI/CSA HGV 4.6-2013, Manually operated valves for use in gaseous hydrogen vehicle fueling stations, and ANSI/CSA HGV 4.7-2013, Automatic valves for use in gaseous hydrogen vehicle fueling stations. At the time of publication, ISO 19880-3:2018 is available from ISO in English only. CSA Group will publish the French version when it becomes available from ISO.This edition of CSA/ANSI HGV 4.4 harmonizes with other North American requirements, including those referenced in CAN/BNQ-1784-000, Canadian Hydrogen Installation Code.The North American deviations are intended toa) correct inaccuracies; andb) replace references to ISO Standards with references to North American Standards, where applicable.This Standard provides safety performance requirements and test methods for valves to be used in gaseous hydrogen environments. This Standard is based on engineering principles, research, and the combined expertise of 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 may 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 that it is necessary and desirable.Users of this Standard are advised that the devices/products/activities within its scope could be subject to regulation at the federal, state, or local levels. Users are strongly urged to investigate this possibility through appropriate channels. In the event of a conflict with this Standard, the federal, state, or local regulations should be followed.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 This document provides the requirements and test methods for the safety performance of high pressure gas valves that are used in gaseous hydrogen stations of up to the H70 designation. This document covers the following gas valves: - check valve; - excess flow valve; - flow control valve; - hose breakaway device; - manual valve; - pressure safety valve; - shut-off valve.