1.1 本规范涵盖了现有下水道和管道修复用折叠/成型聚氯乙烯（PVC）管道的材料、尺寸、工艺、抗压扁性、抗冲击性、管道刚度、挤压质量和标记形式的要求和试验方法。 1.2 根据本规范生产的折叠管用于无压力下水道和管道修复，其中折叠PVC管安装到原始管道的壁中，然后进行膨胀，以提供与原始管道壁的紧密配合，从而形成一种新的结构管-管中管。 注1: 有关安装程序和设计计算，请参阅实践 F1867 . 1.3 本规范包括仅由第节中规定的材料制成的管道 6. 本规范不包括由再加工、回收或再生PVC制成的折叠管。 1.4 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 没有类似或等效的ISO标准。 1.6 以下预防声明仅适用于第节中的试验方法部分 11 。 本标准并不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。 1.7 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 requirements and test methods for materials, dimensions, workmanship, flattening resistance, impact resistance, pipe stiffness, extrusion quality, and a form of marking for folded/formed poly-(vinyl chloride) (PVC) pipe for existing sewer and conduit rehabilitation. 1.2 Folded pipe produced to this specification is for use in non-pressure sewer and conduit rehabilitation where the folded PVC pipe is installed into and then expanded to provide a close fit to the wall of the original conduit, forming a new structural pipe-within-a-pipe. Note 1: For installation procedures and design calculations refer to Practice F1867 . 1.3 This specification includes pipe made only from materials specified in Section 6 . This specification does not include folded pipe manufactured from reprocessed, recycled, or reclaimed PVC. 1.4 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 There is no similar or equivalent ISO Standard. 1.6 The following precautionary statement pertains only to the test method 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. 1.7 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.