eLibrary >
ISO 11120:2015 Gas cylinders - Refillable seamless steel tubes of water capacity between 150 l and 3000 l - Design, construction and testing >
ISO 11120:2015 Gas cylinders - Refillable seamless steel tubes of water capacity between 150 l and 3000 l - Design, construction and testing, 2015
- 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 Mechanical properties
- 6.5 Failure to meet test requirements
- 7 Design
- 7.1 Calculation of cylindrical shell thickness
- 7.2 Design of tube ends
- 7.3 Design drawing
- 8 Construction and workmanship
- 8.1 General
- 8.2 Surface imperfections
- 8.3 Ultrasonic examination
- 8.4 End closure (fitting)
- 8.5 Dimensional tolerances
- 8.5.1 Out-of-roundness
- 8.5.2 Outside diameter
- 8.5.3 Straightness
- 8.5.4 Eccentricity
- 8.5.5 Length
- 8.5.6 Water capacity
- 8.5.7 Mass
- 9 Type approval procedure
- 9.1 General requirements
- 9.2 Prototype tests
- 9.3 Type approval test report
- 9.4 Type approval certificate
- 10 Batch tests
- 10.1 General requirements
- 10.2 Mechanical tests
- 10.2.1 General requirements
- 10.2.2 Tensile test
- 10.2.3 Impact testing
- 10.3 Interpretation of results
- 11 Tests on every tube
- 11.1 General
- 11.2 Hydraulic test
- 11.2.1 Proof pressure test
- 11.2.2 Volumetric expansion test
- 11.3 Hardness testing
- 11.4 Visual inspection
- 11.5 Dimensional inspection
- 11.5.1 Thickness
- 11.5.2 Diameter and length
- 11.5.3 Water capacity and mass
- 11.5.4 Neck threads and openings
- 11.6 Ultrasonic non-destructive test
- 12 Special requirements for tubes for embrittling gases
- 12.1 General
- 12.2 Materials
- 12.3 Design
- 12.4 Construction and workmanship
- 12.4.1 General
- 12.4.2 Surface imperfections
- 12.5 Mechanical tests
- 12.5.1 Tensile and impact tests
- 12.5.2 Hardness test
- 13 Inspection certificate
- 14 Marking
- Annex A (informative) Typical chemistry groupings for seamless steel tubes
- Annex B (normative) Ultrasonic examination
- Annex C (informative) Description and evaluation of manufacturing imperfections and conditions for rejection of seamless steel tubes at time of final inspection by the manufacturer
- Annex D (informative) Acceptance certificate
- Annex E (informative) Type approval certificate
- Annex F (informative) Bend stress calculation
- Bibliography [Go to Page]