AS/NZS ISO 9809.1:2025
Gas cylinders – Design, construction and testing of refillable seamless steel gas cylinders and tubes – Part 1: Quenched and tempered steel cylinders and tubes with tensile strength less than 1 100 MPa
Standard specifies minimum requirements for the material, design, construction and workmanship, manufacturing processes, examination and testing at time of manufacture for refillable seamless steel gas cylinders and tubes with water capacities up to and including 450 l.
This document is identical with, and has been reproduced from, ISO 9809-1:2019 Gas cylinders — Design, construction and testing of refillable seamless steel gas cylinders and tubes – Part 1: Quenched and tempered steel cylinders and tubes with tensile strength less than 1 100 MPa.
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AS/NZS ISO 9809.1:2025 Design, construction and testing of refillable seamless steel gas cylinders and tubes Quenched and tempered steel cylinders and tubes with tensile strength less than 1 100 MPa
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Inspection and testing
6 Materials
6.1 General requirements
6.2 Controls on chemical composition
6.3 Typical steels
6.4 Heat treatment
6.5 Failure to meet test requirements
7 Design
7.1 General requirements
7.2 Limitation on tensile strength
7.3 Design of cylindrical shell thickness
7.4 Design of convex ends (heads and bases)
7.5 Design of concave base ends
7.6 Neck design
7.7 Foot rings
7.8 Neck rings
7.9 Design drawing
8 Construction and workmanship
8.1 General
8.2 Wall thickness
8.3 Surface imperfections
8.4 Ultrasonic examination
8.5 Out-of-roundness
8.6 Mean diameter
8.7 Straightness
8.8 Verticality and stability
8.9 Neck threads
9 Type approval procedure
9.1 General requirements
9.2 Prototype tests
9.2.1 General requirements
9.2.2 Pressure cycling test
9.2.3 Base check
9.2.4 Bend test and flattening test
9.2.5 Torque test for taper thread only
9.2.6 Shear stress calculation for parallel threads
9.3 Type approval certificate
10 Batch tests
10.1 General requirements
10.2 Tensile test
10.3 Impact test
10.4 Hydraulic burst test
10.4.1 Test installation
10.4.2 Test conditions
10.4.3 Interpretation of test results
10.4.4 Acceptance criteria
11 Tests/examinations on every cylinder
11.1 General
11.2 Hydraulic test
11.2.1 Proof pressure test
11.2.2 Volumetric expansion test
11.3 Hardness test
11.4 Leak test
11.5 Capacity check
12 Certification
13 Marking
Annex A (normative) Description and evaluation of manufacturing imperfections in seamless gas cylinders
Annex B (normative) Ultrasonic examination
Annex C (informative) Example of type approval certificate
Annex D (informative) Example of acceptance certificate
Annex E (informative) Bend stress calculation
Annex F (informative) Chemical compositions of internationally recognized steel
Annex G (informative) An example of shear strength calculation for parallel threads
Bibliography
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AS/NZS ISO 9809.1:2025 Design, construction and testing of refillable seamless steel gas cylinders and tubes Quenched and tempered steel cylinders and tubes with tensile strength less than 1 100 MPa
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Inspection and testing
6 Materials
6.1 General requirements
6.2 Controls on chemical composition
6.3 Typical steels
6.4 Heat treatment
6.5 Failure to meet test requirements
7 Design
7.1 General requirements
7.2 Limitation on tensile strength
7.3 Design of cylindrical shell thickness
7.4 Design of convex ends (heads and bases)
7.5 Design of concave base ends
7.6 Neck design
7.7 Foot rings
7.8 Neck rings
7.9 Design drawing
8 Construction and workmanship
8.1 General
8.2 Wall thickness
8.3 Surface imperfections
8.4 Ultrasonic examination
8.5 Out-of-roundness
8.6 Mean diameter
8.7 Straightness
8.8 Verticality and stability
8.9 Neck threads
9 Type approval procedure
9.1 General requirements
9.2 Prototype tests
9.2.1 General requirements
9.2.2 Pressure cycling test
9.2.3 Base check
9.2.4 Bend test and flattening test
9.2.5 Torque test for taper thread only
9.2.6 Shear stress calculation for parallel threads
9.3 Type approval certificate
10 Batch tests
10.1 General requirements
10.2 Tensile test
10.3 Impact test
10.4 Hydraulic burst test
10.4.1 Test installation
10.4.2 Test conditions
10.4.3 Interpretation of test results
10.4.4 Acceptance criteria
11 Tests/examinations on every cylinder
11.1 General
11.2 Hydraulic test
11.2.1 Proof pressure test
11.2.2 Volumetric expansion test
11.3 Hardness test
11.4 Leak test
11.5 Capacity check
12 Certification
13 Marking
Annex A (normative) Description and evaluation of manufacturing imperfections in seamless gas cylinders
Annex B (normative) Ultrasonic examination
Annex C (informative) Example of type approval certificate
Annex D (informative) Example of acceptance certificate
Annex E (informative) Bend stress calculation
Annex F (informative) Chemical compositions of internationally recognized steel
Annex G (informative) An example of shear strength calculation for parallel threads
Bibliography
AS/NZS ISO 9809.1:2025
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.