Tianjin Feilong Tube-making plant Co., Ltd, one of honest enterprises in China and one of most famous enterprises in Tianjin, is a main factory of Dagang district, Tianjin. The enterprise was founded in 1995 and has over 1000 employees in which 36 technical specialists and 8 of them have got high title. The factory covers an area of 40 hectares, with a construction area of 50,000 square meters. The asset of the factory is 140 million yuan. Now the factory has 16 high-frequency welded tube producing line, 3 hot-dipped galvanizing line, 12 tube expanding line and advanced inspectional facilities. It is a synthetical tube making factory contains slitting shear, board-rolling, tube-welding, tube-expanding, and galvanizing. The annual production is: 600,000 tons of Φ20mm—Φ426mm welded tube,..