This document specifies minimum requirements for the material, design, construction and 
workmanship, manufacturing processes, examination and testing at time of manufacture for:
— type 4 composite fully wrapped cylinders or tubes with a non-load sharing liner and composite 
reinforcement on both the cylindrical portion and the dome ends;
— type 5 fully wrapped cylinders or tubes without liners and with a test pressure of less than 60 bar 
and composite reinforcement on both the cylindrical portion and the dome ends;
— water capacities up to 450 l;
— for 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;
— a minimum design life of 15 years.
Cylinders and tubes manufactured and tested according to this document are not intended to contain 
toxic, oxidizing or corrosive gases.
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.rd edition 2020-11 Gas cylinders — Design, construction and testing of refillable composite gas cylinders and tubes — Part 3: Fully wrapped fibre reinforced composite gas cylinders and tubes up to 450 l with non-load-sharing metallic or non-metallic liners or without liners Bouteilles à gaz — Conception, construction et essais des tubes et bouteilles à gaz rechargeables en matériau composite — Partie 3: Tubes et bouteilles à gaz entièrement bobinés en matériau composite renforcés de fibres