Qingdao haili gas industry co., ltd is located in huangdao district, qingdao city. We are one of the leading enterprises specialized in developing, engineering, manufacturing and exporting gas cylinder products and industrial gases in china. Main products: 1. Gas products:high purity argonacetylene gaspropaneoxygenhigh purity nitrogenhigh purity heliumheliumco2 shielding gasmixture 2.All kind of high pressure gas cylinder and welded gas cylinders: gb 5099 gas cylinders, dot gas cylinders, iso 9809 gas cylinders, welded gas cylinders for liquid chlorine and liquid ammonia. 3.Liquid nitrogen containers: all kinds of liquid nitrogen containers from 2l to 50l