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BS ISO 20421-1:2006
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Cryogenic vessels. Large transportable vacuum-insulated vessels Design, fabrication, inspection and testing
Hardcopy , PDF
26-04-2022
English
28-09-2007
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 General requirements
6 Mechanical loads
6.1 General
6.2 Load during the pressure test
7 Chemical effects
8 Thermal conditions
9 Materials
9.1 Selection of materials
9.2 Inspection certificates
10 Design
10.1 Design options
10.2 Common design requirements
10.3 Design by calculation
11 Fabrication
11.1 General
11.2 Cutting
11.3 Cold forming
11.4 Hot forming
11.5 Manufacturing tolerances
11.6 Welding
11.7 Non-welded joints
12 Inspection and testing
12.1 Quality plan
12.2 Production control test plates
12.3 Non-destructive testing
12.4 Rectification
12.5 Pressure testing
13 Marking and labelling
14 Final acceptance test
15 Periodic inspection
Annex A (informative) - Examples of tank plates
Annex B (normative) - Elastic stress analysis
Annex C (normative) - Additional requirements for 9% Ni steel
Annex D (informative) - Pressure strengthening of vessels from
austenitic stainless steels
Annex E (informative) - Specific weld details
Annex F (informative) - Outer-jacket relief devices
Annex G (informative) - Base materials
Annex H (normative) - Components subject to external pressure
(pressure on the convex surface)
- Calculation
Annex I (normative) - Design of openings in cylinders, spheres
and cones - Calculation
Bibliography
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