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AS/NZS ISO 11114.4:2025
[Current]Transportable gas cylinders - Compatibility of cylinder and valve materials with gas contents, Part 4: Test methods for selecting steels resistant to hydrogen embrittlement
AS/NZS ISO 11114.4:2025 identically adopts ISO 11114 4:2017, which 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.
Published: 07/02/2025
Pages: 18
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
3.2 Symbols and abbreviated terms
4 General requirements
5 Test methods
5.1 Disc test (method A)
5.1.1 Principle of test
5.1.2 Test conditions and procedure
5.1.2.1 Sample disc
5.1.2.2 Cell and other apparatus
5.1.2.3 Test procedure
5.1.3 Treatment and interpretation of test results
5.1.3.1 Disc thickness
5.1.3.2 Presentation and interpretation of test results
5.1.4 Failure in conducting test
5.1.5 Test report
5.2 Fracture mechanics test (method B)
5.2.1 Principle of the test method
5.2.2 Test procedure
5.2.2.1 Specimen type
5.2.2.2 Specimen preparation
5.2.2.3 Gas purity and pressure
5.2.2.4 Test apparatus
5.2.2.5 Test method
5.2.2.6 Specimen measurement
5.2.3 Test results
5.2.3.1 Analysis and acceptance criteria
5.2.3.2 Failure in conducting test
5.2.3.3 Test report
5.3 Test method to determine the resistance to hydrogen assisted cracking of steel cylinders (method C)
5.3.1 General
5.3.2 Specimen configurations and numbers of tests
5.3.2.1 Fracture specimens
5.3.2.1.1
5.3.2.1.2
5.3.2.1.3
5.3.2.1.4
5.3.2.2 Tensile specimens
5.3.3 Fatigue precracking
5.3.4 Specimen testing procedure
5.3.4.1
5.3.4.2
5.3.4.3
5.3.4.4
5.3.4.5
5.3.5 Test procedure
5.3.5.1
5.3.5.2
5.3.6 Crack growth examination
5.3.6.1
5.3.6.2
5.3.6.3
5.3.7 Cylinder material qualification
5.3.7.1
5.3.7.2
5.3.8 Failure in conducting test
5.3.9 Test report
5.4 Tensile tests
Bibliography
Cited references in this standard