The company's main alloy tube, high pressure boiler pipe, large diameter thick wall pipe ---- my company specializes in producing thermal expansion pipe, spiral steel pipe, high frequency welded pipe, the annual distribution of the posterior wall of the Baotou Steel, Tianjin Steel and other steel mills seamless steel pipe factory double 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