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BS ISO 4706:2023

BS ISO 4706:2023

$167.15

Gas cylinders. Refillable welded steel cylinders. Test pressure 60 bar and below

Published By Publication Date Number of Pages
BSI 2023 42
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PDF Catalog

PDF Pages PDF Title
2 undefined
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
10 3 Terms, definitions and symbols
3.1 Terms and definitions
11 3.2 Symbols
12 4 Inspection and testing
5 Materials
5.1 General
13 5.2 Chemical composition
6 Design
6.1 General requirements
14 6.2 Valve protection
6.3 Design of openings
7 Calculation of minimum wall thickness (sidewall and ends)
7.1 Sidewall thickness
15 7.2 Design of ends concave to pressure
18 8 Construction and workmanship
8.1 Welding qualification
8.1.1 General
19 8.1.2 Base materials (pressure and non-pressure)
8.1.3 Positions of welds
8.1.4 Welding materials
8.1.5 Retesting
8.1.6 Period of effectiveness
8.1.7 Changes to welding process requiring recertification
20 8.1.8 Welder qualification tests
8.1.9 Results of welder qualification
8.2 Plates and pressed parts
8.3 Welded joints
22 8.4 Tolerances
8.4.1 Out of roundness
8.4.2 Straightness
23 8.4.3 Verticality
8.5 Non-pressure-containing attachments
8.6 Valve protection
8.7 Closure of openings
8.8 Heat treatment
24 9 Testing
9.1 Mechanical testing
9.1.1 General requirements
9.1.2 Types of test and evaluation of test results
28 9.2 Burst test under hydraulic pressure
9.2.1 Test conditions
9.2.2 Interpretation of test
9.2.3 Volumetric expansion
29 9.3 Pressure test
9.4 Radiographic and macro examination
9.4.1 Radiographic examination
30 9.4.2 Macro examination
9.4.3 Examination of flange welding
9.4.4 Examination of welding of non-pressure containing attachments
9.4.5 Unacceptable imperfections at radiographic or macro examination
9.5 Visual examination of the surface of the weld
31 10 Acceptance criteria
32 11 Type approval
33 12 Batch tests
12.1 Inspection lots
12.2 Rate of sampling
34 12.3 Quantity ≤ 3 000 cylinders water capacity less than or equal to 35 l
12.4 Quantity over 3 001 cylinders water capacity greater than 35 l
12.5 Failure to meet batch test requirements
35 13 Test/examinations for all pressure cylinders
14 Markings
15 Certificate
36 Annex A (informative) New design type approval certificate
38 Annex B (informative) Acceptance certificate
40 Bibliography

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BS ISO 4706:2023
$167.15