Our company now has 3 longitudinally ***** welded pipe mills, 6 spirally double-side submerged arc welded pipe mills, 2 anti-corrosion pipe mills, which can produce longitudinally welded steel pipes with diameter range from 21.3 to 630mm and wall thickness range from 1.8 to 22.2mm, spirally double-sided submerged arc welded steel pipe with diameter range from 219mm to 3040mm and wall thickness range from 5.0 to 30mmï¼?and also can do all kinds of anti-corrosion pipes, such as: FBE, 2PE, 3PE, 2PP, 3PP, epoxy coal asphalt, inside and outside solvent free epoxy lining, cement mortar lining, etc.