This part of ISO 11119 specifes requirements for composite gas cylinders and tubes between 0,5 l and 450 l water capacity, for the storage and conveyance of compressed or liquefed gases.This part of ISO 11119 applies to type 2 hoop wrapped cylinder or tube with a load-sharing metal liner and composite reinforcement on the cylindrical portion only.This part of ISO 11119 is limited to cylinders and tubes with composite reinforcement of carbon fbre, aramid fbre or glass fbre (or a mixture thereof) within a matrix or steel wire to provide circumferential reinforcement.Cylinders complying with this part of ISO 11119 have a minimum design life of 15 years.This part of ISO 11119 does not address the design, ftting, and performance of removable protective sleeves.NOTE ISO 11439[5] applies to cylinders intended for use as fuel containers on natural gas vehicles and ISO 11623[6] covers periodic inspection and re-testing of composite cylinders.