ISO 7866:2012
Gas cylinders — Refillable seamless aluminium alloy gas cylinders — Design, construction and testing
ISO 7866:2012 specifies minimum requirements for the material, design, construction and workmanship, manufacturing processes and tests at time of manufacture of refillable seamless aluminium alloy gas cylinders of water capacities up to and including 150 litres for compressed, liquefied and dissolved gases for worldwide use (normally up to +65 °C).
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1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Inspection and testing
6 Materials
6.1 General requirements
6.2 Thermal treatments
6.2.1 Heat-treatable alloys (see Table 1, groups 1, 3 and 4)
6.2.2 Non-heat-treatable alloys (see Table 1, group 2)
6.2.3 Control of specified heat treatment
6.3 Test requirements
6.4 Failure to meet test requirements
7 Design
7.1 General requirements
7.2 Calculation of cylindrical shell thickness
7.3 Design of ends (heads and bases)
7.4 Neck design
7.5 Foot rings
7.6 Neck rings
7.7 Design drawing
7.8 High-strength and/or low-elongation gas cylinder designs
8 Construction and workmanship
8.1 General
8.2 End forming
8.3 Wall thickness
8.4 Surface imperfections and defects
8.5 Neck threads
8.6 Out-of-roundness
8.7 Exposure to heat
8.8 Straightness
8.9 Mean diameter
9 Type approval procedure
9.1 General requirements
9.2 Prototype tests
9.2.3 Pressure-cycling test
9.2.4 Test requirements for high-strength and/or low-elongation gas cylinder designs
9.3 Type approval certificate
10 Batch tests
10.1 General requirements
10.2 Tensile test
10.3 Bend test and flattening test
10.3.1 Bend test
10.3.2 Flattening test
10.4 Hydraulic burst test
10.4.1 Test installation
10.4.2 Test conditions
10.4.3 Interpretation of test
10.5 Test requirements for high-strength and/or low-elongation gas cylinder designs
11 Gas cylinder tests and examinations
11.1 General
11.2 Hydraulic test
11.2.1 Proof pressure test
11.2.2 Volumetric-expansion test
11.3 Hardness test
11.4 Leakage testing
11.5 Examination for neck folds
11.6 Marking verification
11.7 Aluminium alloy gas cylinder surface features at time of manufacture
11.7.1 Requirements
11.7.2 Imperfection considerations
12 Certification
13 Marking
Amendments
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1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Inspection and testing
6 Materials
6.1 General requirements
6.2 Thermal treatments
6.2.1 Heat-treatable alloys (see Table 1, groups 1, 3 and 4)
6.2.2 Non-heat-treatable alloys (see Table 1, group 2)
6.2.3 Control of specified heat treatment
6.3 Test requirements
6.4 Failure to meet test requirements
7 Design
7.1 General requirements
7.2 Calculation of cylindrical shell thickness
7.3 Design of ends (heads and bases)
7.4 Neck design
7.5 Foot rings
7.6 Neck rings
7.7 Design drawing
7.8 High-strength and/or low-elongation gas cylinder designs
8 Construction and workmanship
8.1 General
8.2 End forming
8.3 Wall thickness
8.4 Surface imperfections and defects
8.5 Neck threads
8.6 Out-of-roundness
8.7 Exposure to heat
8.8 Straightness
8.9 Mean diameter
9 Type approval procedure
9.1 General requirements
9.2 Prototype tests
9.2.3 Pressure-cycling test
9.2.4 Test requirements for high-strength and/or low-elongation gas cylinder designs
9.3 Type approval certificate
10 Batch tests
10.1 General requirements
10.2 Tensile test
10.3 Bend test and flattening test
10.3.1 Bend test
10.3.2 Flattening test
10.4 Hydraulic burst test
10.4.1 Test installation
10.4.2 Test conditions
10.4.3 Interpretation of test
10.5 Test requirements for high-strength and/or low-elongation gas cylinder designs
11 Gas cylinder tests and examinations
11.1 General
11.2 Hydraulic test
11.2.1 Proof pressure test
11.2.2 Volumetric-expansion test
11.3 Hardness test
11.4 Leakage testing
11.5 Examination for neck folds
11.6 Marking verification
11.7 Aluminium alloy gas cylinder surface features at time of manufacture
11.7.1 Requirements
11.7.2 Imperfection considerations
12 Certification
13 Marking