ISO TC58

Gas Cylinders

Published

International

Organization

International Organization for Standardization (ISO)

Committee
Information

Chairman Secretariat Secretary

Dr. Warrenn Hepples BSI Jake Lake

Identification

ISO 11114-1
Gas Cylinders - Compatibility of cylinder and valve materials with gas contents
    Part 1: Metallic materials

Scope

This standard provides requirements for the selection of safe combinations of metallic cylinder and valve materials and cylinder gas content. The compatibility data given is related to single gases and to gas mixtures. Seamless metallic, welded metallic and composite gas cylinders and their valves, used to contain compressed, liquefied and dissolved gases, are considered.

Status

Published March 2012.  Amended in 2017.  
Available from   www.iso.ch

Identification

ISO 11114-2

Gas Cylinders - Compatibility of cylinder and valve materials with gas contents
Part 2: Non-Metallic materials

Scope

This standard gives guidance in the selection and evaluation of compatibility between non-metallic materials for gas cylinders and valves and the gas content. It also covers bundles, tubes and pressure drums.

Status

Published April 2013.

Available at www.iso.ch

Identification

ISO 11114-4

Gas Cylinders - Compatibility of cylinder and valve materials with gas contents

     Part 4: Test methods for selecting metallic materials resistant to hydrogen embrittlement

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.

Status

Second edition published in 2017.

Available at www.iso.ch