Graphite/epoxy pressure vessels lined with ultra-thin titanium

Filament-wound, titanium-lined, fiber/epoxy pressure vessels were made using a very high-strength graphite fiber (3570-MPa typical fiber strength). The 0.254-mm-thick titanium liner was used to improve burst performance. The pressure vessels achieved an average burst performance of 241 kPa.cu m/kg, and the fatigue life of titanium liners with good welds (cycled to 50% of the average expected burst pressure) was in excess of 2000 cycles.