1.1 建议并仅限于重力流地下排水系统或地下水位控制，但不建议用于卫生或雨水管道应用。概述了在安装过程中和安装后尽量减少管道偏转或结构损坏的程序。这些安装程序符合“柔性导管”原则。 1.2 本规范适用于所有使用规范的农业地下排水或地下水位控制装置 F667 , F2648 或其它塑料管。 附注1: 本规范正文中对附录的具体引用仅供参考。 1.3 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SI单位的数学转换，仅供参考，可能不等同，也不被视为标准。1.4 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。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法规限制的适用性。 1.5 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》中确立的国际公认的标准化原则制定的。

1.1 This practice is recommended for and limited to gravity flow subsurface drainage systems or water table control, but not recommended for sanitary or storm sewer applications. Procedures are outlined to minimize pipe deflection or structural damage during and after the installation process. These installation procedures are in accordance with “flexible conduit” principles. 1.2 This practice applies to all agricultural subsurface drainage or water table control installations using Specification F667 , F2648 , or other plastic pipe. Note 1: Specific references to the appendix in the body of this practice are for informational purposes. 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, may not be equivalents and are not considered standard. 1.4 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. 1.5 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.