Steel grade pipeline steel X-line production, quality and cheap, ---- I company specializing in the production of thermal expansion pipe, spiral steel pipe, high frequency welded pipe, the annual distribution of Baotou Steel, Tianjin Steel and other steel mills in the posterior wall of seamless steel tubes, I factory sided submerged arc welding process in North China's premier, 35 technicians, thermal expansion pipe equipment unit is a German import unit error is small, accurate scale. The public are welcome to visit and negotiate. Tel 0317-6083098