BS ISO 20703:2006

Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
   3.1 Terms and definitions
   3.2 Symbols
4 Materials
   4.1 General provisions
   4.2 Heat treatment
   4.3 Gas/material compatibility
5 Design
   5.1 General provisions
   5.2 Calculation of wall thickness
   5.3 Design of convex ends (heads and bases)
   5.4 Neck design
   5.5 Foot-rings
   5.6 Neck-rings
   5.7 Shroud
   5.8 Design drawing
6 Construction and workmanship
   6.1 Seamless bodies
   6.2 Welding
   6.3 Non-destructive examination of welds
   6.4 Surface defects
   6.5 Neck threads
   6.6 Out-of-roundness
   6.7 Straightness
   6.8 Eccentricity
   6.9 Stability
7 Tests and examinations
   7.1 General
   7.2 Mechanical tests
   7.3 Hydraulic burst test
   7.4 Pressure-cycling test
   7.5 Hydraulic test
   7.6 Check on the homogeneity of a batch
   7.7 Leakage test
   7.8 Capacity check
   7.9 Examination for neck folds
8 Conformity evaluation
9 Identification marks
10 Records
Annex A (normative) Corrosion tests
Annex B (normative) New design type testing and production
        testing
Annex C (normative) Description, evaluation of manufacturing
        defects and conditions for rejection of welded
        aluminium-alloy gas cylinders at time of visual
        inspection
Annex D (informative) Examples of new design type approval and
        production test certificates
Bibliography

States minimum requirements for the material, design, construction and workmanship, manufacturing processes and tests at manufacture of refillable, transportable, welded aluminium-alloy gas cylinders of water capacities from 0,5 l up to and including 150 l, and of a test pressure not greater than 60 bar (6 MPa) for compressed, liquefied and dissolved gases.

This International Standard specifies minimum requirements for the material, design, construction and workmanship, manufacturing processes and tests at manufacture of refillable, transportable, welded aluminium-alloy gas cylinders of water capacities from 0,5l up to and including 150l, and of a test pressure not greater than 60 bar (6MPa) for compressed, liquefied and dissolved gases.

This International Standard includes requirements for spherical receptacles and cylinders made from seamless bodies with welded non-pressure-bearing attachments such as shrouds and foot-rings.