Hoop-wrapped glass fiber composite materials cylinders with steel liner of compressed natural gas for automotive vehicles This product has the features of good low-temperature toughness,fatigue proof,low ratio of weight to capacity,and so on,which is widely used in cars,buses and taxis.We make stress analysis for this product with ANSYS FEA analyzing software from U.S.A. and manufacture with multi-axis digital control winding system and technology from Germany.Therefore,its performance can absolutely meet the requirement of international standard of ISO 11430:2000 and USA/CANADIAN, National standard of ANSI/CSA NGV 2;2000.