The posterior wall of the spiral steel pipe designed for ---- the Everbright chengye pipeline equipment Manufacturing Co., Ltd. exclusively for --- Our company specializes in the production of thermal expansion of steel pipe, spiral steel pipe, high-frequency welded pipe, the annual distribution of Baotou Steel, Tianjin Steel and other steel mills None seam steel pipe, I plant sided submerged arc welding process is second to none in North China, 35 technicians, thermal expansion pipe equipment unit is the unit imported from Germany, the error is small, precise scale. Welcome to come to visit and negotiate. Tel: 13833778911 Fax :0317 - 6083098