1.1 本规范涵盖与术语中定义的混凝土管道一起使用的外部密封带 C822 并符合规范 C14 , C76 , C412型 , C478/C478M , C506型 , C507型 , C655型 , C985 , C1417 和 C1433 . 1.1.1 I型，橡胶和胶粘带。 1.1.2 II型，塑料薄膜和网增强胶粘带。 1.1.3 III型，化学粘合丁基胶带。 1.2 本规范是本规范的英寸磅配套规范 C877M ; 因此，规范中没有给出SI等效值。 注1: 本规范仅涵盖密封带的设计和材料。当正确安装时，本规范涵盖的密封带足以承受高达13 psi（30 ft）的外部静水压力，且无泄漏。已安装管道中的渗透或渗出流量取决于密封带以外的许多因素；其他规范必须涵盖已安装管道和系统的允许数量和适当测试。 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 external sealing bands to be used in conjunction with concrete pipe as defined in Terminology C822 and conforming to Specifications C14 , C76 , C412 , C478/C478M , C506 , C507 , C655 , C985 , C1417 , and C1433 . 1.1.1 Type I, Rubber and Mastic Bands. 1.1.2 Type II, Plastic Film and Mesh Reinforced Mastic Bands. 1.1.3 Type III, Chemically-Bonded Adhesive Butyl Bands. 1.2 This specification is the inch-pound companion to Specification C877M ; therefore, no SI equivalents are presented in the specification. Note 1: This specification covers only the design and material of the sealing bands. Sealing bands covered by this specification are adequate, when properly installed, for external hydrostatic pressures up to 13 psi, (30 ft) without leakage. The amount of infiltration or exfiltration flow in an installed pipeline is dependent upon many factors other than the sealing bands; allowable quantities and suitable testing of the installed pipeline and system must be covered by other specifications. 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.