标准摘要
[中文适用范围]: ISO 21013 的这一部分规定了用于低温应用的先导式泄压阀的设计、制造和测试的要求。 除了在环境温度到低温温度下运行外,还可以使用低温流体运行。 ISO 21013的这一部分仅限于尺寸不超过DN 300的阀门,设计用于释放单相蒸汽、气体或气体和/或蒸汽的混合物,ISO 21013的这部分没有提供确定安全阀容量的方法(s) 对于特定的低温容器。 ISO 21013-3 中提供了此类方法。 [外文原描述]: ISO 21013-4:2012 specifies the requirements for the design, manufacture and testing of pilot operated pressure relief valves for cryogenic service, i.e. for operation with cryogenic fluids in addition to operation at temperatures from ambient to cryogenic. It is restricted to valves not exceeding a size of DN 300 designed to relieve single phase vapours, gases, or mixtures of gases and/or vapours.
英文名称Cryogenic vessels — Pilot operated pressure relief devices — Part 4: Pressure-relief accessories for cryogenic service