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BS ISO 20421-1:2019+A1:2022

BS ISO 20421-1:2019+A1:2022

$215.11

Cryogenic vessels. Large transportable vacuum-insulated vessels – Design, fabrication, inspection and testing

Published By Publication Date Number of Pages
BSI 2022 130
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PDF Catalog

PDF Pages PDF Title
2 National foreword
8 Introduction
9 1 Scope
2 Normative references
10 3 Terms and definitions
13 4 Symbols
15 5 General requirements
6 Mechanical loads
6.1 General
6.2 Load during the pressure test
16 7 Chemical effects
8 Thermal conditions
9 Materials
9.1 Selection of materials
9.2 Inspection documentation
17 10 Design
10.1 Design options
10.1.1 General
10.1.2 Design by calculation
10.1.3 Design by calculation and pressure strengthening
10.1.4 Design of components by calculation supplemented with experimental methods
10.2 Common design requirements
10.2.1 General
18 10.2.2 Design specification
19 10.2.3 Design loads
23 10.2.4 Fatigue
10.2.5 Corrosion allowance
24 10.2.6 Inspection openings
10.2.7 Pressure relief
25 10.2.8 Valves
10.2.9 Insulation
10.2.10 Degree of filling
10.2.11 Electrical continuity
10.3 Design by calculation
10.3.1 General
10.3.2 Inner vessel
28 10.3.3 Outer jacket
29 10.3.4 Attachments
10.3.5 Piping and accessories
10.3.6 Calculation formula
53 10.3.7 Calculations for operating loads
54 11 Fabrication
11.1 General
11.2 Cutting
11.3 Cold forming
11.3.1 Austenitic stainless steel
55 11.3.2 Ferritic steel
11.3.3 Aluminium or aluminium alloy
56 11.4 Hot forming
11.4.1 General
11.4.2 Austenitic stainless steel
11.4.3 Ferritic steel
11.4.4 Aluminium or aluminium alloy
11.5 Manufacturing tolerances
11.5.1 General
11.5.2 Plate alignment
57 11.5.3 Thickness
58 11.5.4 Dished ends
11.5.5 Cylinders
60 11.6 Welding
11.6.1 General
11.6.2 Qualification
11.6.3 Temporary attachments
61 11.6.4 Welded joints
11.7 Non-welded joints
12 Inspection and testing
12.1 Quality plan
12.1.1 General
62 12.1.2 Inspection stages during manufacture of an inner vessel
12.1.3 Additional inspection stages during manufacture of a large transportable cryogenic vessel
12.2 Production control test plates
12.2.1 Requirements
63 12.2.2 Extent of testing
64 12.3 Non-destructive testing
12.3.1 General
12.3.2 Extent of examination for surface imperfections
12.3.3 Extent of examination for inner-vessel weld seams
65 12.3.4 Acceptance criteria for surface and volumetric imperfections as classified in ISO 6520ā€‘1
66 12.4 Rectification
12.5 Pressure testing
67 13 Marking and labelling
14 Final acceptance test
15 Periodic inspection
16 Documentation
69 Annex A informative Examples of tank plates
72 Annex B informative Elastic stress analysis
80 Annex C normative Additional requirements for 9 % Ni steel
82 Annex D normative Pressure strengthening of vessels from austenitic stainless steels
94 Annex E informative Specific weld details
98 Annex F normative Outer-jacket relief devices
99 Annex G informative Base materials
107 Annex H informative Components subject to external pressure (pressure on the convex surface) ā€” Calculation
117 Annex I informative Design of openings in cylinders, spheres and cones ā€” Calculation
126 Annex J normative Reference material & equivalent thickness
128 Annex K normative Refrigerated liquefied gases
129 Bibliography

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BS ISO 20421-1:2019+A1:2022
$215.11