Compressed Natural Gas Steel Cylinder for Vehicle Compressed natural gas steel cylinder for vehicle is mainly used for long term fixing on cars to contain compressed gas fuels. It enjoys the advantages of high pressure, large capacity, light, safe and dependable and is mainly used for taxies, minibuses, buses and cleaning cars in middle and large cities. It reduces both the automobile operation cost and air pollution in cities,It is one of the strongly recommended green and environment friendly products in the world. manufacture license issued by National Quality Inspection General Bureau, CCS from Chinese Register of Shipping,Certificate for Product Conformity of Bureau Veritas,TPED from internationally authoritative certification organ TUV and ISO9001 and ISO11439 quality system certificate. Other relevant certificates such as DOT, KGS, DNV required for the industry are under active preparation.