F300 high precision high frequency welded pipe production line is mainly to product the square pipe size 100x100-350x350mm, Round pipe size φ125-426mm,thickness is from 5.0-16.0mm.This production line each unit equipment, full use of the domestic and foreign similar equipment, innovative design, full control with PC or computer control, advanced technology, convenient operation and maintenance, and reached the international level in the early ninety s, for the domestic leading level. steel tube mill is one of the main products of Hebei Tengtian Welded Pipe Equipment Manufacturing Co., Ltd. with good quality and Cheapest.Our factory is a suppliers and Manufacturers china ,Wholesale prices are available for customized products.