1.1 本规范涵盖按规定强度设计的无钢筋混凝土管，拟用于输送污水、工业废物和雨水以及涵洞施工。 1.2 规范的完整附件 C985型 已开发， C985M美元 ; 因此，本规范中没有公制等价物。 注1: 本规范仅为制造和采购规范，不包括垫层、回填或现场荷载条件与管道指定强度之间关系的要求。然而，经验表明，该产品的成功性能取决于管道强度、垫层和回填类型的正确选择，以及安装是否符合施工规范。 此处规定的混凝土管道的所有者应注意，他必须将现场要求与规定的管道强度相关联，并在施工现场进行检查。 1.3 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 covers nonreinforced concrete pipe designed for specified strengths and intended to be used for the conveyance of sewage, industrial wastes, and storm water and for the construction of culverts. 1.2 A complete companion to Specification C985 has been developed, C985M ; therefore, no metric equivalents are presented in this specification. Note 1: This specification is a manufacturing and purchase specification only and does not include requirements for bedding, backfill, or the relationship between field load conditions and the designated strength of the pipe. However, experience has shown that the successful performance of this product depends upon the proper selection of the pipe strength, type of bedding and backfill, and care that the installation conforms to the construction specifications. The owner of the concrete pipe specified herein is cautioned that he must correlate the field requirements with the pipe strength specified and provide inspection at the construction site. 1.3 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.