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
1	30458826
89	A-30392540
90	undefined
97	1 Scope 2 Normative references
99	3 Terms, definitions and symbols 3.1 Terms and definitions
101	3.2 Symbols
102	4 Design and manufacture 4.1 General 4.2 Liner 4.2.1 Metallic liners 4.2.2 Non-metallic liners
103	4.2.3 Design drawing
104	4.2.4 Design of ends 4.2.5 Neck ring 4.3 Composite overwrap 4.3.1 Materials 4.3.2 Winding
105	4.4 Finished cylinder 4.4.1 Design drawings 4.4.2 Cylinders without liner 4.4.3 Autofrettage
106	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
107	5.2.1.2 Additional tests for cylinders without liners 5.2.2 Test 2 – Liner material tests 5.2.2.1 Procedure
108	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
109	5.2.3.2 Liner leak test (for metallic welded liners)
110	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
111	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
112	5.2.6.2 For limited life
113	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
114	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
115	5.2.9.2 Blunt impact test for cylinders over 80 l water capacity
117	5.2.10 Test 10 – Flawed cylinder test 5.2.10.1 General 5.2.10.2 Procedure
118	5.2.10.3 Criteria
119	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
120	5.2.11.3 Concluding burst test 5.2.12 Test 12 – Fire resistance test 5.2.12.1 General
121	5.2.12.2 Procedure
122	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
123	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
124	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
125	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
126	6 Conformity evaluation 7 Marking
127	8 Operating instructions for cylinders with non-metallic liners
128	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
129	A.2.3 Prototype testing requirements A.2.4 Prototype testing certificate
133	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
134	A.3.2.2 Equivalent fibre A.3.2.3 Equivalent matrix A.3.2.4 Equivalent liner
135	A.3.2.5 Cylinder variant
136	A.3.3 Design variant test requirements A.3.4 Design variant testing certificate
139	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
140	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
141	A.4.5.2 Inspections A.4.6 Batch acceptance certificate
142	Annex B (informative)Examples of prototype approval and production testing certificates B.1 Type approval certificate – composite cylinders with metallic liners
143	B.2 Type approval certificate – composite cylinders with non-metallic liners
144	B.3 Type approval certificate – composite cylinders without liners
145	B.4 Design variant approval certificate – composite cylinders with metallic liners
146	B.5 Production test certificate
148	Annex C (informative)Example of high velocity impact (bullet) test C.1 Procedure C.2 Criteria C.3 Parameters to monitor and record
149	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
150	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
151	D.5 System assessment D.5.1 Qualification limit envelope D.5.2 Service limit envelope D.5.3 Acceptable results

Published By	Publication Date	Number of Pages
BSI	2022	156


PDF Format	Searchable	Printable	Preview Now

Status	Definitive
Pages	156
Publication Date	2022-07-29
ISBN	978 0 539 23093 2
Standard Number	BS EN 12245:2022 – TC
Title	Tracked Changes. Transportable gas cylinders. Fully wrapped composite cylinders
Descriptors	Pressure testing, Pressure vessels, Fire tests, Impact testing, Performance, Mechanical testing, Transportable, Type testing, Design, Endurance testing, Inspection, Aluminium, Leak tests, Gas cylinders, Composite materials, Environmental testing, Steels, Thermoplastic polymers
Publisher	BSI
Committee	PVE/3/3
ICS Codes	23.020.35 - Gas cylinders

BS EN 12245:2022 – TC

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