(Longitudinal) Our products are large diameter longitudinally welded pipes, longitudinally welded pipes, thick-walled Longitudinal, small-diameter thick-walled pipe, straight seam steel pipe of large diameter, Hebei Longitudinal resistance welding straight seam welding tube, the Changzhou straight seam welding. Our company annual output of outer diameter 325-1620mm, wall thickness 4-85mm straight seam pipe 300,000 tons, the material of Q235, Q345, S360, L290, X42-X70 and other X42 - of X70. Our products are widely used in oil, gas, chemicals, heat, electricity, irrigation, structure, sales of ERW Longitudinal our customers receive the praise of the company's main steel pipe, high-frequency straight seam steel pipe, welded pipe straight seam pipe, the current international state-of-the-art cage roll forming process, the electrical configuration with Germany's Siemens PRC and England MENT DC digital speed control devices to ensure the reliability of the unit high-precision, high efficiency operation. Welcome to order. Tel: 
 0317-5128533 Mobile: 13323270092 Fax :0317-6322267 Contact: Wang Yuehong URL: http://www.baiyipipe.com