1.1 本规范涵盖了用于公路、机场地下排水系统和类似应用的光滑壁穿孔和非穿孔聚氯乙烯（PVC）塑料管和接头的要求，公称尺寸为4、6和8英寸，管内刚度（PS）根据其最小管道刚度指定为PS 28型和PS 46型。 1.2 与公路暗渠管一起使用的模制配件符合规范 第3304页 。为方便起见，部分配件复制于 附件A1 。 1.3 以英寸磅为单位的数值应视为标准。括号中给出的值仅供参考。 注1: PS 28型和PS 46型分别表示28和46的“管道刚度”，如 11.1 。 注2: 管道和配件应按照惯例进行安装 天2321 ，或适用的州或地方规范。 1.4 单位- 以英寸磅为单位的数值应视为标准。括号中给出的值是国际单位制的数学转换，仅供参考，不被视为标准。 1.5 以下安全隐患警告仅适用于第节测试方法部分 11 ，本规范的: 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 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 the requirements for smooth-wall perforated and nonperforated poly(vinyl chloride) (PVC) plastic pipe and couplings for use in subsurface drainage systems of highways, airports, and similar applications in nominal sizes of 4, 6, and 8 in. and in pipe stiffnesses (PS) that are designated as Type PS 28 and Type PS 46 in accordance with its minimum pipe stiffness. 1.2 Molded fittings for use with highway underdrain pipe are in accordance with Specification D3034 . For convenience, some of these fittings are reproduced in Annex A1 . 1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only. Note 1: Type PS 28 and Type PS 46 indicate “pipe stiffness” of 28 and 46, respectively, as outlined in 11.1 . Note 2: Pipe and fittings should be installed in accordance with Practice D2321 , or applicable state or local specifications. 1.4 Units— 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. 1.5 The following safety hazards caveat pertains only to the test methods portion, Section 11 , 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. 1.6 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.