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eLibrary > BS EN ISO 9809-4:2022 Gas cylinders. Design, construction and testing of refillable seamless steel gas cylinders and tubes - Stainless steel cylinders with an Rm value of less than 1 100 MPa >

BS EN ISO 9809-4:2022 Gas cylinders. Design, construction and testing of refillable seamless steel gas cylinders and tubes - Stainless steel cylinders with an Rm value of less than 1 100 MPa, 2023

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BS EN ISO 9809-4:2022 Gas cylinders. Design, construction and testing of refillable seamless steel gas cylinders and tubes - Stainless steel cylinders with an Rm value of less than 1 100 MPa, 2023

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European foreword
Endorsement notice [Go to Page]
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Inspection and testing
6 Materials [Go to Page]
6.1 General requirements
6.2 Controls on chemical composition
6.3 Heat treatment
6.4 Cold working or cryoforming
6.5 Failure to meet test requirements
7 Design [Go to Page]
7.1 General requirements
7.2 Design of cylindrical shell thickness
7.3 Design of convex ends (heads and bases)
7.4 Design of the concave base ends
7.5 Neck design
7.6 Foot rings
7.7 Neck rings
7.8 Design drawing
8 Construction and workmanship [Go to Page]
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 [Go to Page]
9.1 General requirements
9.2 Prototype test [Go to Page]
9.2.1 General requirements
9.2.2 Pressure cycling test
9.2.3 Base check
9.2.4 Torque test for taper thread only
9.2.5 Shear stress calculation for parallel threads
9.3 Type approval certificate
9.4 Specific type approval/production tests for cylinders ordered in small quantities
10 Batch tests [Go to Page]
10.1 General requirements
10.2 Tensile test
10.3 Bend test and flattening test [Go to Page]
10.3.1 Bend test
10.3.2 Flattening test
10.3.3 Ring flattening test
10.4 Impact test
10.5 Hydraulic burst test [Go to Page]
10.5.1 Test installation
10.5.2 Test conditions
10.5.3 Interpretation of test results
10.6 Intergranular corrosion test
11 Tests/examinations on every cylinder [Go to Page]
11.1 General
11.2 Hydraulic test [Go to Page]
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 and conditions for rejection of seamless steel gas cylinders at the time of final inspection by the manufacturer
Annex B (normative) Ultrasonic examination
Annex C (informative) Example of type approval certificate
Annex D (informative) Example of acceptance certificate
Annex E (informative) Example of shear strength calculation for parallel threads
Bibliography [Go to Page]

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BS EN ISO 9809-4:2022 Gas cylinders. Design, construction and testing of refillable seamless steel gas cylinders and tubes - Stainless steel cylinders with an Rm value of less than 1 100 MPa, 2023

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