Manufacturers double submerged arc welded spiral steel pipe ---- Everbright - Industry Pipeline Equipment Manufacturing Co., Ltd. exclusively for --- my company specializes in producing thermal expansion pipe, spiral steel pipe, high frequency welded pipe, the annual distribution of Baotou Steel, Tianjin Steel, steel posterior wall seamless steel pipe plant, I plant sided submerged arc welding process in North China's premier, 35 technicians, thermal expansion pipe equipment unit is a German import unit, the product error is small, accurate scale. The public are welcome to visit and negotiate.