This document specifies minimum requirements for the material, design, construction and
workmanship, manufacturing processes, examination and testing at time of manufacture for:
— type 2 composite hoop wrapped cylinders or tubes with a load-sharing metal liner and composite
reinforcement on the cylindrical portion only;
— water capacities up to 450 l;
— the storage and conveyance of compressed or liquefied gases;
— cylinders and tubes with composite reinforcement of carbon fibre, aramid fibre or glass fibre (or a
mixture thereof) within a matrix or steel wire to provide circumferential reinforcement;
— a minimum design life of 15 years.
This document does not address the design, fitting, and performance of removable protective sleeves.
NOTE 1 References to cylinders in this document include composite tubes if appropriate.
NOTE 2 ISO 11439 applies to cylinders intended for use as fuel containers on natural gas vehicles and
ISO 11623 covers periodic inspection and re-testing of composite cylinders.