标准摘要
[中文适用范围]： 本文件规定了测试方法和如何评估这些测试的结果，以确定适用于气瓶制造的钢（氢及其引起 brittle 化的气体混合物，最大工作压力为3800 bar）。本文件仅适用于无缝钢瓶。如果满足以下任一条件，则本文件的要求不适用：- 所用 embrittling 气体的工作压力小于测试压力的20%；- 混合气体中 embrittling 气体的部分压力小于5 MPa（对于氢和其他 embrittling 气体为50 bar，氢化硫和甲基 mercaptan 除外，在这种情况下部分压力不得超过0.25 MPa）在此情况下，可以设计用于普通（非 embrittling）气体的气瓶。 [外文原描述]： ISO 11114-4: 2017 specifies test methods and the evaluation of results from these tests in order to qualify steels suitable for use in the manufacture of gas cylinders (up to 3 000 l) for hydrogen and hydrogen bearing embrittling gases. This document only applies to seamless steel gas cylinders. The requirements of this document are not applicable if at least one of the following conditions for the intended gas service is fulfilled: - the working pressure of the filled embrittling gas is less than 20 % of the test pressure of the cylinder; - the partial pressure of the filled embrittling gas of a gas mixture is less than 5 MPa (50 bar) in the case of hydrogen and other embrittling gases, with the exception of hydrogen sulphide and methyl mercaptan; in such cases, the partial pressure shall not exceed 0,25 MPa (2,5 bar). NOTE In such cases, it is possible to design the cylinder as for ordinary (non-embrittling) gases.
英文名称Transportable gas cylinders — Compatibility of cylinder and valve materials with gas contents — Part 4: Test methods for selecting steels resistant to hydrogen embrittlement