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。 本文件不包括配件或详细的工程工作，如止推块、支架和锚设计。 由于安装不包括在本文件的范围内，并且为了辅助系统设计，附录A提供了压力测试和检查程序。然而，为了确保在系统设计中使用明确定义的现场测试数据，买方和供应商之间可以通过协议规范地使用附录A。 附录B中给出了记录地上接头挠度数据的示例。

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. This document does not cover fittings nor detailled engineering work like thrust blocks, support and anchor designs. As installation is not included in the scope of this document and to assist system design, Annex A provides a pressure testing and inspection procedure. However, to ensure the use of clearly defined field test data in system design, Annex A can be used normatively by agreement between purchaser and supplier. An example of recording above ground joint deflection data is given in Annex B.