Purchase the full subscription package now and enjoy a 40% discount, along with free updates for future editions.
AS/NZS ISO 9809.1:2025
$242.19
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
AS/NZS ISO 9809.1:2025 identically adopts ISO 9809-1:2019, which 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
Table of contents
Header
About this publication
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Inspection and testing
6 Materials
6.1 General requirements
6.1.1
6.1.2
6.1.3
6.1.4
6.1.5
6.2 Controls on chemical composition
6.2.1
6.2.2
6.2.3
6.3 Typical steels
6.4 Heat treatment
6.4.1
6.4.2
6.4.3
6.5 Failure to meet test requirements
7 Design
7.1 General requirements
7.1.1
7.1.2
7.1.3
7.1.4
7.2 Limitation on tensile strength
7.2.1
7.2.2
7.2.3
7.3 Design of cylindrical shell thickness
7.4 Design of convex ends (heads and bases)
7.4.1
7.4.2
7.5 Design of concave base ends
7.5.1
7.5.2
7.6 Neck design
7.6.1
7.6.2
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
8.4.1
8.4.2
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
9.2.4.1 Bend test
9.2.4.1.1
9.2.4.1.2
9.2.4.1.3
9.2.4.2 Flattening test
9.2.4.2.1
9.2.4.2.2
9.2.4.2.3
9.2.4.3 Ring flattening test
9.2.5 Torque test for taper thread only
9.2.5.1 Procedure
9.2.5.2 Acceptance criteria
9.2.6 Shear stress calculation for parallel threads
9.2.6.1 Procedure
9.2.6.2 Acceptance criteria
9.3 Type approval certificate
10 Batch tests
10.1 General requirements
10.1.1
10.1.2
10.2 Tensile test
10.2.1
10.2.2
10.3 Impact test
10.3.1
10.3.2
10.4 Hydraulic burst test
10.4.1 Test installation
10.4.2 Test conditions
10.4.3 Interpretation of test results
10.4.3.1
10.4.3.2
10.4.3.3
10.4.3.4
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
A.1 Overview
A.2 General
A.2.1
A.2.2
A.3 Manufacturing imperfections and the procedure for their evaluation
