Gas cylinders. Design, construction and testing of refillable seamless steel gas cylinders and tubes. Part 3: Normalized steel cylinders and tubes (ISO 9809-3:2019)
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This document specifies minimum requirements for the material, design, construction and workmanship, manufacturing processes, examination and testing at the time of manufacture for refillable seamless steel gas cylinders and tubes with water capacities up to and including 450 l. It is applicable to cylinders and tubes for compressed, liquefied and dissolved gases and for normalized or normalized and tempered steel cylinders and tubes.
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Sisällysluettelo
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 Heat treatment
6.4 Failure to meet test requirements
7 Design
7.1 General requirements
7.2 Design of cylindrical shell thickness
7.3 Design of convex ends (heads and bases)
7.4 Design of concave base ends
7.5 Neck design
7.6 Foot rings
7.7 Neck rings
7.8 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
9.3 Type approval certificate
10 Batch tests
10.1 General requirements
10.2 Tensile test
10.3 Impact test
11 Tests/examinations on every cylinder
11.1 General
11.2 Hydraulic test
11.3 Hardness test
11.4 Leak test
11.5 Capacity check
12 Certification
13 Marking
Annex A Description and evaluation of manufacturing imperfections in seamless gas cylinders (normative)
Annex B Ultrasonic examination (normative)
Annex C Example of type approval certificate (informative)
Annex D Example of acceptance certificate (informative)
Annex E Bend stress calculation (informative)
Annex F An example of shear strength calculation for parallel threads (informative)
ISO 10286:2015 Gas cylinders -- Terminology
ISO 11114-1:2012 Gas cylinders -- Compatibility of cylinder and valve materials with gas contents -- Part 1: Metallic materials
ISO 11114-4:2017 Transportable gas cylinders -- Compatibility of cylinder and valve materials with gas contents -- Part 4: Test methods for selecting steels resistant to hydrogen embrittlement
ISO 10286:2015 Gas cylinders -- Terminology
ISO 11114-1:2012 Gas cylinders -- Compatibility of cylinder and valve materials with gas contents -- Part 1: Metallic materials
ISO 11114-4:2017 Transportable gas cylinders -- Compatibility of cylinder and valve materials with gas contents -- Part 4: Test methods for selecting steels resistant to hydrogen embrittlement
ISO 13341:2010 Gas cylinders -- Fitting of valves to gas cylinders
ISO 13769:2018 Gas cylinders -- Stamp marking
ISO 148-1:2016 Metallic materials -- Charpy pendulum impact test -- Part 1: Test method
ISO 6506-1:2014 Metallic materials -- Brinell hardness test -- Part 1: Test method
ISO 6508-1:2016 Metallic materials -- Rockwell hardness test -- Part 1: Test method
ISO 6892-1:2016 Metallic materials -- Tensile testing -- Part 1: Method of test at room temperature
ISO 9712:2012 Non-destructive testing -- Qualification and certification of NDT personnel
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