This production line is metallurgy, construction, transportation, machinery, vehicles and other industries of straight seam welded pipe production equipment, hot rolled steel belt as raw material, by using the method of cold bending forming and high frequency welding, production requirements specifications of the pipe. A complete set of unit during production of circular tube by my company independent development of TNF molding process. The production line adopts the mature, reliable, complete, economic applicable advanced technology, advanced equipment, to ensure product quality, cost, and the consumption indexes reach more advanced level, products have strong competitiveness in quality and price. Applicable to steel grade: low carbon steel, low alloy steel, material sigma b or less 758 mpa, sigma s acuities were 621 mpa. The highest grade of steel X70
