1.1 本规范涵盖了不锈钢屏蔽橡胶衬垫联轴器的材料和试验，该联轴器具有整体约束功能，用于连接根据规范制造的无轮毂铸铁土壤管和配件 A888 ，最新修订版，以及CISPI 301，最新版本，用于排水、废水和雨水应用，其中管道和配件制造商的安装说明或项目要求需要外部约束。这些联轴器具有整体约束功能，使联轴器能够用于外部关节约束装置无法轻易安装在方向垂直变化的位置和最大流量延长的位置。 1.2 这些联轴器应适用于连接无轮毂铸铁管道和配件，其中垫圈定位凸耳和承插珠铸造在管道或配件上，或两者兼有。 1.3 按照规范制造的铸铁污水管配件 A888 或CISPI 301被允许在具有或不具有定位凸耳的情况下铸造，并且被要求具有插口珠。其尺寸和公差见规范图1和图2 A888 和CISPI 301。根据CISPI 301和 A888 使用铸态凸起标记进行标记。按照本标准生产联轴器的联轴器制造商应在其安装说明中包括有关其要求的信息，当在安装本标准所涵盖的联轴器期间，在联轴器的密封区域发现凸起标记时。本标准无意与管道和配件制造商的安装说明相冲突。 1.4 对本标准具有管辖权的小组委员会了解铸铁土壤管道研究所发布的其他耦合标准，CISPI 310，FM 1680，由Factory Mutual发布； 规格 C1540 , C1277 , 1056年 和 F1476 由ASTM出版；加拿大标准协会发布的CSA B602；以及BS EN 877。本标准无意重复或与这些标准的要求相矛盾。 1.5 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，不应视为标准的一部分。 1.6 以下注意事项仅适用于试验方法部分，第节 7. 。 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 the materials and testing of stainless steel shielded, rubber gasketed couplings having an integral restraint feature for joining hubless cast iron soil pipes and fittings manufactured in accordance with Specification A888 , latest revision, and CISPI 301, latest revision used in drain, waste, and storm water applications where external restraint is needed or required by the pipe and fittings manufacturer’s installation instructions or specified by project requirements. These couplings have an integral restraint feature which enables the couplings to be used in locations where external joint restraint cannot easily be installed at vertical changes of direction and locations subject to extended periods of maximum flow. 1.2 These couplings shall be suitable for joining hubless cast iron pipes and fittings where gasket positioning lugs and spigot beads are cast on the pipe or fittings or both. 1.3 Cast iron soil pipe fittings manufactured to comply with Specification A888 or CISPI 301 are permitted to be cast with or without positioning lugs and required to have spigot beads. The dimensions and tolerances for these are found in Figures 1 and 2 of Specification A888 and CISPI 301. The fittings manufactured to CISPI 301 and A888 are marked using as cast raised markings. The coupling manufacturers producing couplings to this standard shall include information in their installation instructions regarding their requirements when raised markings are found in the sealing area of the coupling during installation of the couplings covered by this standard. It is not the intent of this standard to conflict with the pipe and fittings manufacturer’s installation instructions. 1.4 The subcommittee with jurisdiction over this standard is aware of other coupling standards published by the Cast iron Soil Pipe Institute, CISPI 310, FM 1680 published by Factory Mutual; Specifications C1540 , C1277 , A1056 , and F1476 published by ASTM; CSA B602 published by the Canadian Standards Association; and BS EN 877. It is not the intent of this standard to duplicate or contradict the requirements of these standards. 1.5 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 to be considered as a part of the standard. 1.6 The following precautionary caveat pertains only to the test method portion, Section 7 , 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.