CSA/ANSI HGV 4.4:21

CSA Preface This 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 to a) correct inaccuracies; and b) replace references to ISO StandardDetails with references to North American StandardDetails, 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 StandardDetails Council of Canada requirements for National StandardDetails of Canada. It has been published as a National Standard of Canada by CSA Group. This Standard has been approved by the American National StandardDetails 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.