本文件规定了低温环境下泄压阀的设计、制造和测试要求，即除在环境温度至低温的环境温度下运行外，还可在-10°C以下的低温流体中运行。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 the requirements for the design, manufacture and testing of pressure relief valves for cryogenic service, i.e. for operation with cryogenic fluids below -10 °C in addition to operation at ambient temperatures from ambient to cryogenic.All current amendments available at time of purchase are included with the purchase of this document.