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AS/NZS ISO 11439:2025

[Current]

Gas cylinders - High pressure cylinders for the on-board storage of natural gas as a fuel for automotive vehicles

AS/NZS ISO 11439:2025 identically adopts ISO 11439:2013, which specifies requirements for light-weight refillable gas cylinders for on-board storage of high pressure compressed natural gas as a fuel for automotive vehicles
Published: 28/02/2025
Pages: 80
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 Service conditions
4.1 General
4.1.1 Standard service conditions
4.1.2 Service life
4.2 Maximum pressures
4.3 Design number of filling cycles
4.4 Temperature range
4.4.1 Settled gas temperature
4.4.2 Cylinder temperatures
4.4.3 Transient temperatures
4.5 Gas composition
4.5.1 General
4.5.2 Dry gas
4.5.3 Wet gas
4.6 External surfaces
5 Inspection and testing
6 Type approval procedure
6.1 General
6.2 Type approval
6.3 Statement of service
6.4 Design data
6.4.1 Drawings
6.4.2 Stress analysis report
6.4.3 Material property data
6.4.4 Fire protection
6.5 Manufacturing data
6.6 Fracture performance and non-destructive examination (NDE) defect size
6.7 Specification sheet
6.8 Additional supporting data
6.9 Type approval certificate
7 Requirements for type 1 metal cylinders
7.1 General
7.2 Materials
7.2.1 General requirements
7.2.2 Controls on chemical composition
7.2.2.1 Steel
7.2.2.2 Aluminium
7.3 Design Requirements
7.3.1 Test pressure
7.3.2 Burst pressure
7.3.3 Stress analysis
7.3.4 Maximum defect size
7.3.5 Openings
7.3.6 Fire protection
7.3.7 Attachments
7.4 Construction and workmanship
7.4.1 End closure
7.4.2 Heat treatment
7.4.3 Neck threads
7.4.4 Exterior environmental protection
7.4.5 Traceability
7.5 Prototype testing procedure
7.5.1 General requirements
7.5.2 Prototype tests
7.5.2.1 Tests required
7.5.2.2 Material tests for steel cylinders
7.5.2.3 Material tests for aluminium alloy cylinders
7.5.2.4 Hydrostatic pressure burst test
7.5.2.5 Ambient temperature pressure cycling test
7.5.2.6 Leak-before-break (LBB) test
7.5.2.7 Bonfire test
7.5.2.8 Penetration test
7.5.3 Change of design
7.6 Batch tests
7.6.1 General requirements
7.6.2 Required tests
7.6.2.1 Batch tests
7.6.2.2 Pressure cycling test
7.7 Tests on every cylinder
7.8 Batch acceptance certificate
7.9 Failure to meet test requirements
8 Requirements for type 2 hoop-wrapped cylinders
8.1 General
8.2 Materials
8.2.1 General requirements
8.2.2 Controls on chemical composition
8.2.2.1 Steel
8.2.2.2 Aluminium
8.2.3 Composite materials
8.2.3.1 Resins
8.2.3.2 Fibres
8.3 Design requirements
8.3.1 Test pressure
8.3.2 Burst pressures and fibre stress ratios
8.3.3 Stress analysis
8.3.4 Maximum defect size
8.3.5 Openings
8.3.6 Fire protection
8.4 Construction and workmanship
8.4.1 General
8.4.2 Liner
8.4.3 Neck threads
8.4.4 Overwrap
8.4.4.1 Fibre winding
8.4.4.2 Curing of thermosetting resins
8.4.4.3 Autofrettage
8.4.5 Exterior environmental protection
8.4.6 Traceability
8.5 Prototype testing procedure
8.5.1 General requirements
8.5.2 Prototype tests
8.5.2.1 Tests required
8.5.2.2 Material tests for steel liners
8.5.2.3 Material tests for aluminium alloy liners
8.5.2.4 Hydrostatic pressure burst test
8.5.2.4.1
8.5.2.4.2
8.5.2.5 Ambient temperature pressure cycling test
8.5.2.6 Leak-before-break (LBB) test
8.5.2.7 Bonfire test
8.5.2.8 Penetration test
8.5.2.9 Environmental test
8.5.2.10 Flaw tolerance tests
8.5.2.11 High temperature creep test
8.5.2.12 Accelerated stress rupture test
8.5.2.13 Extreme temperature pressure cycling test
8.5.2.14 Resin shear strength test
8.5.3 Change of design
8.6 Batch tests on liners and cylinders
8.6.1 General requirements
8.6.2 Required tests
8.6.2.1 Liner tests
8.6.2.2 Cylinder tests
8.6.2.3 Pressure cycling test
8.7 Tests on every liner and cylinder
8.8 Batch acceptance certificate
8.9 Failure to meet test requirements
8.9.1 Liners
8.9.2 Cylinders
9 Requirements for type 3 fully-wrapped cylinders
9.1 General
9.2 Materials
9.2.1 General requirements
9.2.2 Controls on chemical composition
9.2.2.1 Steel
9.2.2.2 Aluminium
9.2.3 Composite materials
9.2.3.1 Resins
9.2.3.2 Fibres
9.3 Design requirements
9.3.1 Test pressure
9.3.2 Burst pressures and fibre stress ratios
9.3.3 Stress analysis
9.3.4 Maximum defect size
9.3.5 Openings
9.3.6 Fire protection
9.4 Construction and workmanship
9.4.1 General
9.4.2 Liner
9.4.3 Neck threads
9.4.4 Overwrap
9.4.4.1 Fibre winding
9.4.4.2 Curing of thermosetting resins
9.4.4.3 Autofrettage
9.4.5 Exterior environmental protection
9.4.6 Traceability
9.5 Prototype testing procedure
9.5.1 General requirements
9.5.2 Prototype tests
9.5.2.1 Tests required
9.5.2.2 Material tests for steel liners
9.5.2.3 Material tests for aluminium alloy liners
9.5.2.4 Hydrostatic pressure burst test
9.5.2.5 Ambient temperature pressure cycling test
9.5.2.6 Leak-before-break (LBB) test
9.5.2.7 Bonfire test
9.5.2.8 Penetration test
9.5.2.9 Environmental test
9.5.2.10 Flaw tolerance tests
9.5.2.11 High temperature creep test
9.5.2.12 Accelerated stress rupture test
9.5.2.13 Extreme temperature pressure cycling test
9.5.2.14 Resin shear strength
9.5.2.15 Impact damage test
9.5.3 Change of design
9.6 Batch tests on liners and cylinders
9.6.1 General requirements
9.6.2 Liner tests
9.6.3 Cylinder tests
9.6.4 Cylinder failures
9.7 Tests on every liner and cylinder
9.7.1 General
9.7.2 Liner tests
9.7.3 Cylinder tests
9.8 Batch acceptance certificate
9.9 Failure to meet test requirements
9.9.1 Liners
9.9.2 Cylinders
10 Requirements for type 4 fully-wrapped composite cylinders
10.1 General
10.2 Materials
10.2.1 General requirements
10.2.2 Resins
10.2.3 Fibres
10.2.4 Plastic liners
10.2.5 Metal bosses
10.3 Design requirements
10.3.1 Test pressure
10.3.2 Burst pressures and fibre stress ratios
10.3.3 Stress analysis
10.3.4 Openings
10.3.5 Fire protection
10.4 Construction and workmanship
10.4.1 General
10.4.2 Neck threads
10.4.3 Curing of thermosetting resins
10.4.4 Exterior environmental protection
10.4.5 Traceability
10.5 Prototype testing procedure
10.5.1 General
10.5.2 Prototype tests
10.5.2.1 Tests required
10.5.2.2 Material tests for plastic liners
10.5.2.3 Hydrostatic pressure burst test
10.5.2.4 Ambient temperature pressure cycling test
10.5.2.5 Leak-before-break (LBB) test
10.5.2.6 Bonfire test
10.5.2.7 Penetration test
10.5.2.8 Environmental test
10.5.2.9 Flaw tolerance tests
10.5.2.10 High temperature creep test
10.5.2.11 Accelerated stress rupture test
10.5.2.12 Extreme temperature pressure cycling test
10.5.2.13 Resin shear strength
10.5.2.14 Impact damage test
10.5.2.15 Boss torque test
10.5.2.16 Permeation test
10.5.2.17 Natural gas cycling test
10.5.3 Change of design
10.6 Batch tests
10.6.1 General requirements
10.6.2 Required tests
10.6.2.1 Burst test
10.6.2.2 Materials tests
10.6.2.3 Pressure cycling test
10.6.2.4 Failure to meet batch test requirements
10.7 Tests on every cylinder
10.8 Batch acceptance certificate
10.9 Failure to meet test requirements
11 Marking
12 Preparation for dispatch
Annex A
A.1 Tensile tests for steel and aluminium cylinders and liners
A.2 Impact test for steel cylinders and steel liners
A.3 Sulfide stress cracking test for steel
A.4 Corrosion tests for aluminium
A.5 Sustained load cracking (SLC) tests for aluminium
A.6 Leak-before-break (LBB) test
A.7 Extreme temperature pressure cycling
A.8 Brinell hardness test
A.9 Coating tests
A.10 Leak test
A.11 Hydrostatic pressure test
A.12 Hydrostatic pressure burst test
A.13 Ambient temperature pressure cycling
A.14 Environmental test
A.14.1 General
A.14.2 Cylinder set-up and preparation
A.14.3 Pendulum impact preconditioning
A.14.4 Environmental fluids for exposure
A.14.5 Pressure cycle and pressure hold
A.14.6 Acceptable result
A.15 Bonfire test
A.15.1 General
A.15.2 Cylinder set-up
A.15.3 Fire source
A.15.4 Temperature and pressure measurements
A.15.5 General test requirements
A.15.6 Acceptable results
A.16 Penetration tests
A.17 Composite flaw tolerance tests
A.18 High temperature creep test
A.19 Accelerated stress rupture test
A.20 Impact damage test
A.21 Permeation test
A.22 Tensile properties of plastics
A.23 Softening temperature of plastics
A.24 Coating batch tests
A.24.1 Coating thickness
A.24.2 Coating adhesion
A.25 Boss torque test
A.26 Resin shear strength
A.27 Natural gas cycling test
A.28 Torque test
Annex B
B.1 Introduction
B.2 General requirements
B.3 Flaw detection of the cylindrical parts
B.3.1 Procedure
B.3.2 Reference standard
B.4 Calibration of equipment
B.5 Wall thickness measurement
B.6 Interpretation of results
B.7 Certification
Annex C
Annex D
D.1 General
D.2 List of forms
Annex E
Annex F
Annex G
G.1 General
G.2 Distribution
G.3 Reference to existing codes, standards and regulations
G.4 Cylinder handling
G.5 Installation
G.6 Use of cylinders
G.7 In-service inspection
AMENDMENT 1
Annex H
H.1 Accelerated cyclic corrosion
H.2 Procedure
H.3 Instructions
Cited references in this standard
Content history
DR AS/NZS ISO 11439:2024