1.1 本规范涵盖混凝土拱形管的柔性接头，使用橡胶垫圈进行防漏接头。本规范涵盖了接头的设计以及与之配套使用的橡胶垫圈的要求，用于在所有其他方面符合本规范要求的拱形管 C506型 如果尺寸允许偏差存在冲突，则应以本规范对接头的要求为准。 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 flexible joints for concrete arch pipe, using rubber gaskets for leak resistant joints. The specification covers the design of joints and the requirements for rubber gaskets to be used therewith, for arch pipe conforming in all other respects to Specification C506 provided that if there is conflict in permissible variations in dimensions the requirements of this specification for joints shall govern. 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 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.