BS EN 12245:2022

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Transportable gas cylinders – Fully wrapped composite cylinders

Published By	Publication Date	Number of Pages
BSI	2022	68

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Categories: 23.020.35 - Gas cylinders, BSI

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Description

This document specifies minimum requirements for the materials, design, construction, prototype testing and routine manufacturing inspections of fully wrapped composite gas cylinders for compressed, liquefied and dissolved gases. NOTE 1 For the purposes of this document, the word “cylinder” includes tubes (seamless transportable pressure receptacles of a water capacity exceeding 150 l and of not more than 3 000 l). This document is applicable to cylinders that comprise a liner of metallic material (welded or seamless) or non-metallic material (or a mixture thereof), reinforced by a wound composite consisting of fibres of glass, carbon or aramid (or a mixture thereof) embedded in a matrix. This document is also applicable to composite cylinders without liners. This document is not applicable to gas cylinders which are partially covered with fibres and commonly called “hoop wrapped” cylinders. For hoop wrapped composite cylinders, see EN 12257. NOTE 2 This document does not address the design, fitting and performance of removable protective sleeves. Where these are fitted, they are considered separately. This document is primarily for compressed, liquefied and dissolved gases other than LPG. NOTE 3 For dedicated LPG cylinders, see EN 14427.

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PDF Pages	PDF Title
2	undefined
9	1 Scope 2 Normative references
11	3 Terms, definitions and symbols 3.1 Terms and definitions
13	3.2 Symbols
14	4 Design and manufacture 4.1 General 4.2 Liner 4.2.1 Metallic liners 4.2.2 Non-metallic liners
15	4.2.3 Design drawing
16	4.2.4 Design of ends 4.2.5 Neck ring 4.3 Composite overwrap 4.3.1 Materials 4.3.2 Winding
17	4.4 Finished cylinder 4.4.1 Design drawings 4.4.2 Cylinders without liner 4.4.3 Autofrettage
18	4.4.4 Manufacturing requirements for the finished cylinder 5 Cylinder and material tests 5.1 General 5.2 Requirements and test methods 5.2.1 Test 1 – Composite material tests, including adhesives (where applicable) 5.2.1.1 All cylinders
19	5.2.1.2 Additional tests for cylinders without liners 5.2.2 Test 2 – Liner material tests 5.2.2.1 Procedure
20	5.2.2.2 Criteria 5.2.3 Test 3 – Liner test (for metallic liners only) 5.2.3.1 Liner burst test at ambient temperature only
21	5.2.3.2 Liner leak test (for metallic welded liners)
22	5.2.4 Test 4 – Pressure test of finished cylinders at ambient temperature 5.2.4.1 Procedure 5.2.4.2 Criteria 5.2.4.3 Parameters to monitor during the test 5.2.5 Test 5 – Cylinder burst test 5.2.5.1 Procedure
23	5.2.5.2 Criteria 5.2.5.3 Parameters to monitor and record 5.2.6 Test 6 – Resistance to pressure cycles at test pressure (ph) and ambient temperature 5.2.6.1 For non-limited life
24	5.2.6.2 For limited life
25	5.2.7 Test 7 – Immersion in salt water 5.2.7.1 General 5.2.7.2 Procedure 5.2.7.3 Criteria 5.2.7.4 Parameters to monitor and record
26	5.2.8 Test 8 – Exposure to elevated temperature at test pressure 5.2.8.1 Procedure 5.2.8.2 Criteria 5.2.8.3 Parameters to monitor and record 5.2.9 Test 9 – Drop/Impact test 5.2.9.1 Drop test for cylinders up to and including 80 l water capacity
27	5.2.9.2 Blunt impact test for cylinders over 80 l water capacity
29	5.2.10 Test 10 – Flawed cylinder test 5.2.10.1 General 5.2.10.2 Procedure
30	5.2.10.3 Criteria
31	5.2.10.4 Parameters to monitor and record 5.2.11 Test 11 – Extreme temperature cycle test 5.2.11.1 Vacuum cycling conditioning 5.2.11.2 Pressure cycling stages
32	5.2.11.3 Concluding burst test 5.2.12 Test 12 – Fire resistance test 5.2.12.1 General
33	5.2.12.2 Procedure
34	5.2.12.3 Criteria 5.2.12.4 Parameters to monitor and record during the test 5.2.13 Test 13 – Permeability test of cylinders with non-metallic or without liners 5.2.13.1 Procedure 5.2.13.2 Criteria
35	5.2.13.3 Parameters to monitor and record 5.2.14 Test 14 – Liner collapse and blistering test (only for cylinders with non-metallic liners for compressed gases) 5.2.14.1 Procedure 5.2.14.2 Criteria 5.2.14.3 Parameters to monitor and record 5.2.15 Test 15 – Test of compatibility of thermoplastic liners and matrix for type 5 cylinders with air or oxidising gases 5.2.15.1 General 5.2.15.2 Procedure 5.2.15.3 Criteria
36	5.2.16 Test 16 – Torque test (for taper threads only) 5.2.16.1 Procedure 5.2.16.2 Criteria 5.2.16.3 Parameters to monitor and record 5.2.17 Test 17 – Neck strength 5.2.17.1 Procedure 5.2.17.2 Criteria 5.2.17.3 Parameters to monitor and record
37	5.2.18 Test 18 – Cylinder stability 5.2.19 Test 19 – Neck ring 5.2.20 Test 20 – Shear stress calculation for parallel threads for steel liners and steel bosses 5.2.20.1 Procedure 5.2.20.2 Criteria 5.2.20.3 Parameters to monitor and record 5.3 Failure to meet test requirements 5.3.1 Metallic liners 5.3.2 Finished cylinder
38	6 Conformity evaluation 7 Marking
39	8 Operating instructions for cylinders with non-metallic liners
40	Annex A (normative)Prototype, design variant and production testing A.1 General A.2 Prototype testing A.2.1 General A.2.2 Definition of new design
41	A.2.3 Prototype testing requirements A.2.4 Prototype testing certificate
45	A.3 Design variant testing A.3.1 General A.3.2 Definition of a design variant A.3.2.1 Conditions to be satisfied
46	A.3.2.2 Equivalent fibre A.3.2.3 Equivalent matrix A.3.2.4 Equivalent liner
47	A.3.2.5 Cylinder variant
48	A.3.3 Design variant test requirements A.3.4 Design variant testing certificate
51	A.4 Production testing A.4.1 General A.4.2 Production test requirements A.4.3 Liner batch tests and inspections A.4.3.1 Metallic liner
52	A.4.3.2 Non-metallic liner A.4.4 Composite materials batch tests and inspections A.4.5 Tests and inspections of the finished cylinder A.4.5.1 Tests
53	A.4.5.2 Inspections A.4.6 Batch acceptance certificate
54	Annex B (informative)Examples of prototype approval and production testing certificates B.1 Type approval certificate – composite cylinders with metallic liners
55	B.2 Type approval certificate – composite cylinders with non-metallic liners
56	B.3 Type approval certificate – composite cylinders without liners
57	B.4 Design variant approval certificate – composite cylinders with metallic liners
58	B.5 Production test certificate
60	Annex C (informative)Example of high velocity impact (bullet) test C.1 Procedure C.2 Criteria C.3 Parameters to monitor and record
61	Annex D (informative)Standardized test requirements for thermally activated pressure relief devices D.1 General D.2 Cylinder test D.2.1 Cylinder set up D.2.2 Fire source D.2.3 Temperature and pressure measurements
62	D.2.4 General test requirements D.2.5 Tests options D.2.5.1 Option A – Controlled release of pressure D.2.5.2 Option B – Fire until rupture D.3 PRD test D.4 Vent test
63	D.5 System assessment D.5.1 Qualification limit envelope D.5.2 Service limit envelope D.5.3 Acceptable results

Additional information

Status	Definitive
Pages	68
Publication Date	2022-06-30
ISBN	978 0 539 04109 5
Standard Number	BS EN 12245:2022
Title	Transportable gas cylinders – Fully wrapped composite cylinders
Identical National Standard Of	EN EN
Replaces	BS EN 12245:2009+A1:2011
Descriptors	Transportable, Type testing, Mechanical testing, Fire tests, Pressure vessels, Impact testing, Composite materials, Gas cylinders, Endurance testing, Inspection, Aluminium, Design, Steels, Leak tests, Pressure testing, Performance, Environmental testing, Thermoplastic polymers
Publisher	BSI
Committee	PVE/3/3
ICS Codes	23.020.35 - Gas cylinders

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