Hefei Zijin Steel Tube Manufacturing Co., Ltd. is established in the year 2004 and is specialized in the developing and manufacturing of the large-diameter thick-wall straight-seam Longitudinally Submerged Arc Welded (LSAW) carbon steel pipes including Oil & Gas Line pipe, Rolled Steel Pipes, Joist Frame Structure Pipes, Machinery Roller -making Pipes, Concrete Filled Steel Tubular Structure, Fluids Conveying pipe, Structure Building Pipes.The dimension of our products covers such a scope as followings: Wall-thickness 10-60mm, Out-diameter 350-2200mm, Length 6000-12000mm Should you have interest of items mentioned above Please kindly let us know by return mail. For more information, you are invited to visit our web site: three w dot hfzijin dot comWe are always looking forward to further cooperation with you. Best regards, Ms. April Ji Marketing DepartmentHefei Zijin Steel Tube Manufacturing Co., Ltd. Address: Jingsan Road Baohe Industrial Centre Hefei Anhui China 230088 Tel.:+86-551-3367701, 3367888-171Fax: +86-551-3368553Email:april dot ji at 163 dot comMSN: april dot ji at 163 dot com