本文件阐述了系统标准ISO 23856中规定的无端推力地上安装管道和接头的系统设计。其适用于止推块之间直线铺设的最小刚度为SN 5000的管道。它基于ISO TS 20656-1中描述的安全概念，默认为后果等级2（CC2）。对于其他后果类别，本文件中规定的某些细节可能需要修改。本文件针对双钟形联轴器。然而，许多信息可用于其他柔性接头系统。

This document addresses the system design of pipe and joints of above ground installations without end-thrust as specified in systems standard ISO 23856. It is directed to pipelines with a minimum stiffness of SN 5000 laid in a straight line between thrust blocks. It is based on the safety concepts described in ISO TS 20656-1, with consequence class 2 (CC2) as default. For other consequence classes, certain details specified in this document can need to be modified. This document is directed to double bell coupling. However, much of the information can be adapted and utilized for other flexible joints systems.