Ten billion Hebei Steel Pipe Manufacturing Co., Ltd. produces longitudinally welded pipes, thick-walled straight seam welded pipe, ERW, double-sided submerged arc welding Longitudinal, I produced the Longitudinal diameter of 350mm- 1420mm, wall thickness 6mm-50mm, the production of material 20 #, 16Mn, Q235B alloy steel 

 Longitudinal Longitudinal and non-model specifications, production execution Longitudinal GB/T9711.3-2005 the highest standards, our company produces longitudinally welded pipes of large diameter thick wall and oil natural gas, heating, chemical, power and other industries. Our company has many years of production 

 Longitudinal quality of experience, the production of good, reasonable price, welcome to order hotline 0317 -5128533 Mobile: 13323270092 Fax :0317 -6322267 Contact: Wang Yuehong URL: http://www.baiyipipe.com