前言这是第三版CSA/ANSI LC 4-CSA 6.32，用于燃气分配系统的压接配件和阀门。它取代了2012年和2007年出版的先前版本以及2013年的附录A。新版包括对标题的更新，对第4.3条的修订。c） 以及对5.2.2.1的修订，以澄清阀门位置。本标准适用于本标准规定范围内的合格评定。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本标准适用于金属（铜、钢、不锈钢和可锻铸铁）压接式配件和阀门（以下简称配件，除非另有规定），用于安装在地上、地下、室内和室外的燃气系统。1.2本标准适用于额定工作压力不超过125 psi（862 kPa）的燃气系统。 1.3本标准适用于标称尺寸为3/8英寸至4英寸的燃气系统用配件。1.4符合本标准规定的配件和其他部件应被视为具有-40°F（-40°C）至180°F（82.2°C）的环境温度范围。1.5本标准包括确定适用于隐蔽位置的要求（见第3条）。1.6在本标准中，“应”用于表示要求，即。，用户为遵守本标准而必须满足的规定；“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）来定义其应用。1.7如果本标准中给出的测量值后跟其他单位的等效值，则第一个规定值应视为规范值。 本文件以码/磅数量为基础，并提供SI当量作为公制换算指南。注:见附件A和B。

PrefaceThis is the third edition of CSA/ANSI LC 4 - CSA 6.32, Press-connect fittings and valves for use in fuel gas distribution systems. It supersedes the previous editions published in 2012 and 2007 and addenda A in 2013. This new edition includes an update to the title, revision to Clause 4.3. c) and a revision to 5.2.2.1 to clarify valve position. This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard. 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.Scope1.1 This Standard applies to metallic (copper, steel, stainless steel, and malleable iron) press-connect type fittings, and valves (hereafter referred to as fittings unless otherwise specified) for use with fuel gas systems intended for installation above ground, below ground, indoors, and outdoors.1.2 This Standard applies to fuel gas systems rated for operating pressures not exceeding 125 psi (862 kPa).1.3 This Standard applies to fittings intended for use with fuel gas systems 3/8 in through 4 in nominal size.1.4 Fittings and other components complying with the provisions of this Standard shall be considered as having an ambient temperature range of minus 40 °F (-40 °C) to 180 °F (82.2 °C).1.5 This Standard includes requirements to establish the suitability for use in concealed locations (see Clause 3).1.6 In 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.1.7 If a value for measurement as given in this Standard is followed by an equivalent value in other units, the first stated value is to be regarded as the specification. This document is based on yard/pound quantities with SI equivalents provided as a guide for making metric conversions. Note: See Annexes A and B.