ISO 11114-4:2017

Transportable gas cylinders — Compatibility of cylinder and valve materials with gas contents — Part 4: Test methods for selecting steels resistant to hydrogen embrittlement

Publication date:   Mar 30, 2017

General information

90.60 Close of review   Jun 14, 2022

ISO

ISO/TC 58 Gas cylinders

International Standard

23.020.35   Gas cylinders

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 11114-4:2005

NOW

PUBLISHED
ISO 11114-4:2017
90.60 Close of review
Jun 14, 2022