Quality products, reasonable price, professional production and sales of various types of spiral steel pipe --- my company specializes in producing thermal expansion pipe, spiral steel pipe, high frequency welding tube reasonable annual distribution of Baotou Steel, Tianjin Steel and other steel mills posterior wall 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.