1.1 本规范提供了用于排水、废物和通风应用的塑料配件的标准配件几何形状和铺设长度。（见规范 2661美元 和 2665美元 .) 1.2 符合本标准规范要求的管件设计用于外径受控管道。随着壁厚和外径的变化，管道的内径可能会发生很大变化，因此不适合用作接头插座。 1.3 以英寸-磅单位表示的数值视为标准值。括号中给出的值是数学转换为SI单位，仅供参考，不被视为标准单位。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）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》中确立的国际公认标准化原则制定的。

1.1 This specification provides standard fitting geometries and laying lengths for plastic fittings intended for use in drain, waste, and vent applications. (See Specifications D2661 and D2665 .) 1.2 Fittings meeting the requirements of this standard specification are designed for use with outside diameter controlled pipe. The inside diameter of pipe can vary significantly as the wall thickness and outside diameter varies and therefore is not suitable for use as a fitting socket. 1.3 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. 1.4 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.