本文件仅规定了通过串联组合组装的产品的要求 符合ISO 4126-1和ISO 4126-4的安全阀或CSPR（受控安全泄压系统） 和ISO 4126-5，以及根据ISO 4126-2安装在爆炸装置上游的爆破片安全装置 阀门入口五个管道直径内的阀门。它规定了设计、应用和标记 由爆破片安全装置、安全阀或CSPR组成的此类产品的要求 以及（如适用）连接管或短管。此外，还给出了一种建立模型的方法 施胶组合中使用的组合排放系数。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document specifies only the requirements for a product assembled from the in-series combination of safety valves or CSPRS (controlled safety pressure relief systems) according to ISO 4126-1, ISO 4126-4 and ISO 4126-5, and bursting disc safety devices, according to ISO 4126-2, installed upstream of the valve within five pipe diameters of the valve inlet. It specifies the design, application and marking requirements for such products, composed of the bursting disc safety device, a safety valve or CSPRS and, where applicable, a connecting pipe or spool piece. In addition, it gives a method for establishing the combination discharge factor used in sizing combinations.All current amendments available at time of purchase are included with the purchase of this document.