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AS/NZS ISO 11118:2025

[Current]

Gas cylinders - Non-refillable metallic gas cylinders - Specification and test methods

AS/NZS ISO 11118:2025 identically adopts ISO 11118:2025 which specifies requirements for the material, design, inspections, construction and workmanship, manufacturing processes, and tests at manufacture of non-refillable metallic gas cylinders of welded, brazed, or seamless construction. It also specifies the requirements for the non-refillable sealing devices and their methods of testing.
Published: 27/06/2025
Pages: 34
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Materials
5.1 General requirements
5.1.1
5.1.2
5.1.3
5.1.4
5.1.5
5.1.6
5.1.7
5.1.8
5.2 Material types
5.2.1 Carbon and low-alloy steels
5.2.1.1
5.2.1.2
5.2.1.3
5.2.1.4
5.2.1.5
5.2.2 Aluminium and aluminium alloy
5.2.2.1
5.2.2.2
5.2.2.3
5.2.3 Austenitic stainless steels
5.2.3.1
5.2.3.2
5.2.3.3
5.2.3.4
5.3 Chemical compositions
5.3.1 Carbon and low-alloy steels
5.3.1.1
5.3.1.2
5.3.1.3
5.3.2 Aluminium and aluminium alloys
6 Inspection and testing
7 Design
7.1 General requirements
7.1.1
7.1.2
7.1.3
7.2 Calculation of pressure containing parts
7.3 Design drawings
8 Construction and workmanship
8.1 Construction
8.1.1 Types of construction of cylinder shell
8.1.1.1 Seamless construction
8.1.1.1.1
8.1.1.1.2
8.1.1.2 Welded construction
8.1.1.2.1 General requirements
8.1.1.2.2 Welding qualifications
8.1.1.2.2.1 General
8.1.1.2.2.2 Materials for pressure and non-pressure containing parts
8.1.1.2.2.3 Positions of welds
8.1.1.2.2.4 Welding consumables
8.1.1.2.2.5 Retesting
8.1.1.2.2.6 Period of validity
8.1.1.2.2.7 Essential variables of the welding process
8.1.1.2.2.8 Welder and weld operator qualification tests
8.1.1.2.2.9 Acceptance
8.1.1.3 Brazed construction
8.1.1.4 Attachments and openings
8.1.2 Cylinder non-refillability
8.1.3 Pressure relief devices
8.2 Workmanship
9 Type approval procedure
9.1 General requirements
9.2 Prototype tests
9.2.1 General
9.2.2 Material tests
9.2.3 Tensile tests
9.2.3.1
9.2.3.2
9.2.3.3
9.2.4 Burst tests
9.2.4.1
9.2.4.2
9.2.4.3
9.2.4.4
9.2.4.5
9.2.4.6
9.2.5 Drop tests
9.2.5.1
9.2.5.2
9.2.5.3
9.2.5.4
9.2.6 Dimension checks
9.2.6.1
9.2.6.2
9.2.7 Valve to cylinder interface test
9.3 Design type approval
10 Batch tests
10.1 General requirements
10.2 Failure to meet test requirements
11 Tests on every cylinder
11.1 Inspection
11.2 Proof pressure test
11.3 Leak testing
11.4 Rejection criteria
11.5 Repairs
12 Markings
12.1 General
12.2 Manufacturing and operational markings
12.2.1
12.2.2
12.2.3
12.2.4
12.2.5
12.2.6
12.3 Other markings
13 Test reports and certificate of conformance
Annex A
A.1 General
A.2 Requirements
A.2.1 General
A.2.2 Requirements for non-refillable valves
A.2.2.1 General
A.2.2.1.1 Valve description
A.2.2.1.1.1
A.2.2.1.1.2
A.2.2.1.2 Materials
A.2.2.2 Design and construction
A.2.2.2.1 Valve body
A.2.2.2.2 Valve operating mechanism
A.2.2.2.3 Leak tightness
A.2.2.2.4 Leakage rate
A.2.3 Requirements for pierceable metal sealing membranes
A.2.3.1 General
A.2.3.2 Materials
A.2.3.3 Design and construction
A.2.3.4 Leak tightness
A.2.3.5 Leakage rate
A.3 Prototype tests of permanently attached non-refillable valves
A.3.1 General
A.3.2 Test valves
A.3.2.1 Schedule of tests
A.3.2.2 Hydraulic pressure test
A.3.2.3 Leak tightness test
A.3.2.4 Testing for non-refillability
A.3.2.5 Oxygen pressure surge valve test
A.4 Prototype tests of pierceable metal sealing membranes
A.4.1 General
A.4.2 Schedule of tests
A.4.3 Membrane/cylinder interface test
A.4.4 Leak tightness test
Annex B
Annex C
Annex D
Bibliography
Cited references in this standard
Content history
DR AS/NZS ISO 11118:2025