1.1 本规程描述了标称直径为4.5 mm的污水管道和导管的修复程序 在里面和30英寸。(100 通过插入折叠PVC管，使用机械成圆装置或蒸汽压力对现有管道的内表面进行加热、加压和膨胀。成品成型PVC管将是连续的，并符合现有管道。该修复过程可用于各种非压力应用，例如:卫生下水道、雨水管和工艺管道。 1.2 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户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。 1.4 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。 ====意义和用途====== 4.1 本规程供参与无压下水道和管道修复的设计师和规范者、监管机构、业主和检验机构使用。

1.1 This practice describes the procedures for the rehabilitation of sewer lines and conduits with nominal diameters between 4 in. and 30 in. (100 mm and 750 mm) by the insertion of folded PVC pipe, which is heated, pressurized, and expanded against the interior surface of the existing pipe with either a mechanical rounding device or steam pressure. The finished formed PVC pipe will be continuous and conform to the existing pipe. This rehabilitation process can be used in a variety of non–pressure applications, such as: sanitary sewers, storm sewers, and process piping. 1.2 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. 1.3 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. 1.4 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. ====== Significance And Use ====== 4.1 This practice is for use by designers and specifiers, regulatory agencies, owners, and inspection organizations who are involved in the rehabilitation of non-pressure sewers and conduits.