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ISO 21172-1:2015 Gas cylinders - Welded steel pressure drums up to 3 000 litres capacity for the transport of gases - Design and construction - Part 1: Capacities up to 1 000 litres >
ISO 21172-1:2015 Gas cylinders - Welded steel pressure drums up to 3 000 litres capacity for the transport of gases - Design and construction - Part 1: Capacities up to 1 000 litres, 2015
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Inspection and testing
- 5 Materials
- 5.1 General provisions
- 5.1.1 Materials for the pressure envelope
- 5.1.2 The materials used for the drum
- 5.1.3 All parts welded to the drum
- 5.1.4 Welding consumables
- 5.1.5 Conformance
- 5.2 Heat treatment
- 6 Design
- 6.1 Design stress
- 6.2 Design temperature
- 6.3 Calculation of thickness
- 6.3.1 Cylindrical wall
- 6.3.2 Spherical shell
- 6.3.3 Dished ends
- 6.4 Minimum thickness for handling
- 6.5 Fittings
- 6.5.1 General
- 6.5.2 Screwed fittings
- 6.5.3 Bolted connections
- 6.5.4 Protection of fittings
- 6.5.5 Fittings and valves protection
- 6.5.6 Compensation of openings
- 7 Lifting attachments and rolling bands
- 7.1 Vertical and spherical drums
- 7.2 Horizontal drums
- 7.3 Rolling bands
- 8 Manufacturing process — Welding procedures
- 9 Fabrication
- 9.1 Shell sections
- 9.2 Dished ends
- 9.3 Cold pressed dished ends
- 9.4 Hot pressed dished ends
- 10 Welded joints
- 11 Surface finish of material
- 12 Assembly
- 12.1 Temporary attachments
- 12.2 Alignment of joints
- 12.3 Attachments and fittings
- 13 Weld defect repairs
- 14 Construction and workmanship
- 14.1 Thickness measurement
- 14.2 Out of roundness
- 14.3 Straightness
- 15 Testing and examination
- 15.1 Test plates
- 15.2 Provision of welded test plates
- 15.3 Number of test specimens
- 15.4 Mechanical tests
- 15.4.1 Tensile tests
- 15.4.2 Bend tests
- 15.4.3 Impact test
- 15.4.4 Macro examination
- 15.5 Non-destructive examination of completed welds
- 15.5.1 General
- 15.5.2 Radiography/radioscopy
- 15.5.3 Rejection criteria
- 15.6 Failure to meet test requirements
- 15.7 Lifting points
- 16 Type approval procedure
- 16.1 General requirements
- 16.2 Type approval tests
- 16.2.1 Prototype tests
- 16.3 Manufacturing tests on each drum
- 16.3.1 Volume check
- 16.3.2 Tare weight check
- 16.3.3 Proof pressure test
- 16.3.4 Pneumatic test
- 16.3.5 Final inspection
- 16.3.6 Tightness test
- 17 Marking
- 17.1 Drums
- 17.2 Hot pressure welded drums
- 17.3 Pressure drums for very toxic gases (LC50 less than 200 ppmV)
- 17.4 Position and size of marking
- 18 Certification
- 18.1 Type approval
- 18.2 Manufacturing conformance
- 19 Certificate
- Annex A (informative) Description and evaluation of manufacturing of a welded steel pressure drums at the time of visual inspection
- Annex B (informative) Example of calculation note for determination of thickness for shell and dished end for pressure drums according to 6.4
- Annex C (informative) Example of Approval certificate
- Annex D (informative) Hot pressure welded heads
- Annex E (normative) Manufacturing defects in welded steel pressure drums and rejection criteria
- Bibliography [Go to Page]