AS 2337.3:2020 pdf Gas cylinder test stations Part 3: Transportable gas cylinders — Periodic inspection and testing of composite cylinders (ISO 11623:2015, MOD)
1 Scope
This International Standard specifies the requirements for periodic inspection and testing and to verify the integrity for further service of hoop-wrapped and fully-wrapped composite transportable gas cylinders, with aluminium-alloy, steel or non-metallic liners or of linerless construction (Types 2, 3, 4, and 5), intended for compressed, liquefied or dissolved gases under pressure, of water capacity from 0,5 l up to 450 l. This International Standard is written to address the periodic inspection and testing of composite cylinders constructed to ISO 11119-1, ISO 11119-2, and ISO 11119-3 standards and can be applied to other composite cylinders designed to comparable standards when authorized by the competent authority. As far as practicable, this International Standard also can be applied to cylinders of less than 0,5 l water capacity.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 32, Gas cylinders for medical use — Marking for identification of content
ISO 6406, Gas cylinders — Seamless steel gas cylinders — Periodic inspection and testing
ISO 7225, Gas cylinders — Precautionary labels
ISO 10461, Gas cylinders — Seamless aluminium-alloy gas cylinders — Periodic inspection and testing
ISO 11114-2, Gas cylinders — Compatibility of cylinder and valve materials with gas contents — Part 2:Non-metallic materials
ISO 11621, Gas cylinders — Procedures for change of gas service
ISO 13341, Gas cylinders — Fitting of valves to gas cylinders
ISO 13769, Gas cylinders — Stamp marking
ISO 25760, Gas cylinders — Operational procedures for the safe removal of valves from gas cylinders
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 composite overwrap
fibres (3.3) and matrix (3.14) taken together as a combined unit
3.2 exterior coating
layer of material applied to the cylinder as a protective coating not intended to be removed or for
cosmetic purposes EXAMPLE Gel coat and paint.
Note 1 to entry: Not all composite cylinders will have a special exterior coating.
3.3 fibre
load-carrying part of the composite overwrap (3.1)
EXAMPLE Glass, aramid or carbon.
3.4 fully-wrapped composite cylinder without liner
cylinder manufactured only from continuous fibre (3.3) strands in a matrix (3.14) wrapped in both
circumferential and longitudinal directions
Note 1 to entry: Also known as Type 5.
3.5 fully-wrapped composite cylinder with liner
steel, aluminium-alloy or non-metallic liner (3.10) wrapped with continuous fibre (3.3) strands in a
matrix (3.14) both circumferentially and longitudinally
Note 1 to entry: Also known as either Type 3 (metallic liner) or Type 4 (non-load sharing liner).
3.6 hoop-wrapped composite cylinder
seamless steel or aluminium-alloy liner (3.10) wrapped with continuous fibre (3.3) strands or steel wire [embedded in a matrix (3.14)] around only the cylindrical body of the liner, leaving the metal in the neck and base regions exposed
Note 1 to entry: Also known as Type 2.
3.7 translucent composite cylinder
cylinder that permits the passage of light
3.8 identification label
label containing the permanent markings required by the relevant design specification
3.9 design life
maximum life (in number of years) to which a composite cylinder or tube is designed and approved in accordance with the applicable standard
3.10 liner
inner portion of the composite cylinder designed both to contain the gas and transmit the gas pressure to the composite overwrap (3.1)
3.11 non-metallic liner
liner (3.10) made from thermoplastic, thermosetting, or elastomeric material
3.12 protective sleeve
transparent or non-transparent cover fitted to the outside surface of the cylinder
3.13 repair
minor refurbishment to return the cylinder to its acceptable condition
EXAMPLE Adding resin.
3.14 matrix
material used to bind and hold the fibres (3.3) in place
Note 1 to entry: The matrix is sometimes called resin.
3.15 rejected cylinder
cylinder not fit for service or which needs to be set aside for further evaluation or testing in its
present condition
3.16 Level 1 damage
DEPRECATED: Level 1 condition
minor damage that can occur during normal use
3.17 Level 2 damage
DEPRECATED: Level 2 condition
damage that is more severe than Level 1 (3.16) and, where repair (3.13) is authorized and where the
cylinder can be returned to service, or based upon the recommendations of the manufacturer to be
classified as Level 1 or Level 3 (3.18)
AS 2337.3:2020 pdf Gas cylinder test stations Part 3: Transportable gas cylinders — Periodic inspection and testing of composite cylinders (ISO 11623:2015, MOD)
