1.steel pipes 2.O/A trade product 3.seamless,welded,erw,ssaw,lsaw pipes 4.API,CE,ISO 5.foucs ... ,Fluid Pipe, Water Delievery,Heating Pipe,Power Pipe,Structure Pipe,Scaffold,Piling PipeManufacture ProcessesRaw material Test→Uncoiling→Strip leveling →End Cutting ...