cold-drawing seamless pipe

Seamless steel tube production, mainly by hot-strip outside, still have adopted in hot or cold rolling mill perforation after pulling production process of seamless steel pipe, seamless steel tube in recent years in the proportion of 42-45% in stability, welded pipe is rising trend. Seamless steel tube is welded pipe and the reliability of the material and adaptability, especially thick wall and steel production. The main problem is high investment, high cost, manufacturing technology is complex, wall thickness and ellipse tolerance. And welding tube sheet is actually in the deep processing products, prices of similar condition, the market competitiveness of seamless steel tube for its reliability and improve the quality of steel, with the continuous improvement and welded pipe to raise the level of technical equipment and parts of seamless tube is welded pipe market and have the possibility of alternative, but it is very limited.