Study on the development of composite CNG pressure vessels

Abstract The development of composite CNG (compressed natural gas) pressure vessels with HDPE (high density polyethylene) liner and metal end nozzles was studied. The CNG environmental tests carried out for HDPE, resins and reinforcing fibres showed no significant damages. The metal end nozzles and the dome contour of the liner were designed, respectively. The stacking sequence was analysed and applied in filament winding of the pressure vessels. They showed satisfactory results when subjected to burst tests. The fibre volume fractions, V f , were obtained by image analyser and the average V f s were 54.09% and 53.49% in hoop and helical regions, respectively.