制冷系统和热泵阀门要求、试验和标记

[中文适用范围]： 本文件规定了用于包括热泵在内的制冷系统的阀门和具有类似主体的其他部件（以下称为阀门）的安全要求、某些功能要求以及标记。 本文件包括对带有延长管的阀门的要求。 本文件描述了设计承受压力的阀门零件时应遵循的程序以及选择材料时使用的标准。 本文件描述了可以安全方式考虑低温下降低的影响值的方法。 本文件适用于压力释放装置（包括爆破片装置）的阀体和阀盖的设计，但不适用于压力释放装置设计或应用的任何其他方面。 此外，本文件适用于最高工作温度不超过200℃、最大允许压力不超过160bar1)的阀门。 [外文原描述]： This document specifies safety requirements, certain functional requirements, and marking of valves and other components with similar bodies, hereinafter called valves, for use in refrigerating systems including heat pumps. This document includes requirements for valves with extension pipes. This document describes the procedure to be followed when designing valve parts subjected to pressure as well as the criteria to be used in the selection of materials. This document describes methods by which reduced impact values at low temperatures may be taken into account in a safe manner. This document applies to the design of bodies and bonnets for pressure relief devices, including bursting disc devices, with respect to pressure containment but it does not apply to any other aspects of the design or application of pressure relief devices. In addition, this document is applicable to valves with a maximum operating temperature not exceeding 200 °C and a maximum allowable pressure not exceeding 160 bar[1]. [1] 1 bar = 0,1 MPa.