前言:这是CSA/ANSI HGV 4.1《氢气分配系统》的第二版。它取代了2013年出版的前一版。本版CSA/ANSI HGV 4.1与其他北美要求一致，包括加拿大氢气安装规范中引用的要求。本版本的其他变更包括与CSA HGV 4.9《氢燃料站标准》保持一致，并增加了附录A。本标准代表了安全操作、坚固耐用的结构以及新制造的车辆氢气分配系统机械和电气特性性能测试的标准，主要用于将燃油直接分配到车辆燃油存储容器中。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会表明它是必要和可取的。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本标准规定了压力为25、35、50和70 MPa时，用于燃料电池车辆集成燃料储存系统的压缩氢气分配器的机械和电气要求。 本标准涵盖的配药系统包括a）HGV配药器，该配药器将所有配药系统组件集成在一个单元中，包括燃油计量和登记、流量控制和安全管理装置、热交换器，以及带有所列软管和喷嘴的车辆燃料瓶过充和过压保护（见图a.1）；orb）HGV加气机，主要是面向客户的装置，带有加油软管组件、软管、喷嘴和操作员界面，流量计量、过压和溢流保护的关键部件位于单独的装置或氢气加油站系统的一部分（见图a.2）。以下工作压力适用:25、35、50和70 MPa。每个分配系统可以有多个阀组，允许为多辆车加油。1.2本标准涵盖的显示系统旨在与符合SAE J2719和ISO 14687要求的燃料一起使用- 2.1.3本标准适用于在超压、超温和超填充（即超密度）情况下保护车辆存储的分配器。1.4本标准还适用于作为模块化加油站一部分的分配系统，该加油站具有远程燃油计量、登记、控制和管理装置，以及集成加油站控制系统中包含的车辆燃油存储过量加注和过压保护。对于这些应用，请参考CSA HGV 4.9.1.5。本标准不适用于为氢动力工业卡车加油的分配器。注:CSA HPIT 2涉及用于氢动力工业卡车加油的分配器。1.6除非本标准中另有规定，否则本标准中提及的所有压力均应视为表压。1.7这些要求并非旨在阻止本标准中未明确规定的分配系统的设计和施工。 在考虑替代设计或施工时，应评估所用材料产生与本标准规定性能相当的性能的能力。1.8在本标准中，“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”用于表示一种选择或在标准范围内允许的选择；“can”用来表示可能性或能力。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）- 必须）定义其应用程序。1.9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 HGV 4.1,Hydrogen dispensing systems. It supersedes the previous edition published in 2013.This edition of CSA/ANSI HGV 4.1 harmonizes with other North American requirements, including those referenced in the Canadian Hydrogen Installation Code. Additional changes to this edition include alignment with CSA HGV 4.9,Standard for hydrogen fuelling stations, and the addition of Annex A.This Standard represents a standard for safe operation, substantial and durable construction, and performance testing of the mechanical and electrical features of newly manufactured hydrogen gas- dispensing systems for vehicles, intended primarily to dispense fuel directly into the vehicle fuel storage container.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.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:1.1This Standard specifies mechanical and electrical requirements for dispensers of compressed hydrogen gas intended for fuel storage systems integral to fuel cell vehicles at pressures of 25, 35, 50, and 70 MPa.Dispensing systems covered by this Standard includea) HGV dispensers that integrate all dispensing system components in a single unit, including fuel metering and registering, flow control and safety management devices, heat exchangers, and vehicle fuel cylinder over-fill and over-pressure protection with listed hoses with nozzles (see Figure A.1); orb) HGV dispensers that are primarily the customer facing unit with fueling hose assembly listed hoses, nozzles, and operator interface, and where the key components of flow metering and over- pressure and over-fill protection are located in a separate unit or part of the hydrogen fuelling station system (see Figure A.2).The following service pressures are applicable: 25, 35, 50, and 70 MPa.Each dispensing system could have multiple valve trains allowing fuelling of multiple vehicles.1.2Dispensing systems covered by this Standard are intended for use with fuel meeting the requirements in SAE J2719 and ISO 14687-2.1.3This Standard applies to dispensers that protect the vehicle storage for over-pressure, over- temperature, and over-fill (i.e., over-density) situations.1.4This Standard also applies to dispensing systems that are part of a modular fuelling station with remote fuel metering, registering, control and management devices, and vehicle fuel storage over-fill and over-pressure protection included in an integrated fuelling station control system. For these applications, refer to CSA HGV 4.9.1.5This Standard does not apply to dispensers intended for the refueling of hydrogen-powered industrial trucks.Note:CSA HPIT 2 addresses dispensers intended for the refuelling of hydrogen-powered industrial trucks.1.6All references to pressure throughout this document Standard are to be considered gauge pressures unless otherwise specified in this Standard.1.7These requirements are not intended to prevent the design and construction of a dispensing system not specifically prescribed in this Standard. In considering alternative designs or construction, the materials used shall be evaluated as to their ability to yield equivalent performance to that prescribed by this Standard.1.8In 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; "may" is used to express an option or that which is permissible within the limits of the standard; and "can" is used to express possibility or capability. 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.1.9The 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.