1.1 本规范涵盖了聚氯乙烯（PVC）Schedule 40管件。包括对材料、工艺、尺寸和爆破压力的要求。 注1: 承插式CPVC塑料管件，表40，以前包含在本标准中，现在包含在规范中 F438 . 1.2 本规范涵盖的产品仅适用于与管道材料化学相容的加压液体的分配。由于使用压缩空气或其他压缩气体测试组件和系统存在固有危险，一些制造商不允许对其产品进行气动测试。 在气动测试之前，请咨询特定的产品/组件制造商，了解其特定的测试程序。 注2: 加压（压缩）空气或其他压缩气体含有大量储存的能量，如果系统因任何原因发生故障，这些能量会带来严重的安全隐患。 1.3 用于PVC管道的接头、法兰、特殊塑料到金属过渡件和附件等配件均包含在规范中 1970年 . 1.4 本规范的文本引用了提供解释性材料的注释、脚注和附录。 这些注释和脚注（不包括表格和图中的注释和脚注）不应被视为规范的要求。 1.5 以英寸-磅单位表示的值应被视为标准值。括号中给出的值是对国际单位制的数学转换，仅供参考，不被视为标准值。 1.6 以下安全隐患警告仅适用于测试方法部分，第节 7. ，本规范。 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。 本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 This specification covers poly(vinyl chloride) (PVC) Schedule 40 pipe fittings. Included are requirements for materials, workmanship, dimensions, and burst pressure. Note 1: Socket-type CPVC plastic pipe fittings, Schedule 40, which were formerly included in this standard, are now covered by Specification F438 . 1.2 The products covered by this specification are intended for use with the distribution of pressurized liquids only, which are chemically compatible with the piping materials. Due to inherent hazards associated with testing components and systems with compressed air or other compressed gases, some manufacturers do not allow pneumatic testing of their products. Consult with specific product/component manufacturers for their specific testing procedures prior to pneumatic testing. Note 2: Pressurized (compressed) air or other compressed gases contain large amounts of stored energy which present serious safety hazards should a system fail for any reason. 1.3 Fitting such as unions, flanges, special plastic-to-metal transitions and appurtenances intended for use with PVC piping are covered under Specification F1970 . 1.4 The text of this specification references notes, footnotes, and appendixes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification. 1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.6 The following safety hazards caveat pertains only to the test method portion, Section 7 , of this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.