Tianjin Haoshengxin Steel Pipe Co., Ltd is the supporting enterprise of Huixin Group, specializing producing welded square pipes, rectangular pipes round pipes and abnormity pipe. With the most advanced technique of automatic cold-incurvature molding unit in China and the high-tech welding unit in the world, combining with the method of dispose welding line and kerfs that exploiture by our company, consulting with the standard of Chinese GB, American ASTM, German DIN, we have set down our own standard up to the standard mentioned above. ...>>More
