Lightweight Composite-Material Tanks for Cryogenic Liquids

A lightweight composite-material tank suitable for the storage and transport of liquid oxygen and other cryogenic liquids has been developed. The tank includes a metallic liner compatible with liquid oxygen, a graphite/ epoxy overwrap, an insulating layer of lightweight polyurethane foam, an aromatic polyamide/epoxy overwrap for resistance to abrasion and impact, and one or two lightweight fittings or bosses. Tanks of this type have been made with diameters ranging from 6 to 36 in. (15 to 91 cm) and lengths ranging from 1 to 4 ft (30 to 122 cm).