Production method of steel pipe

   Steel pipes are divided into seamless steel pipes and welded steel pipes. The production process of seamless steel pipe is to Pierce the solid tube billet or steel ingot into the hollow tube, and then roll it into the desired size of steel pipe. The different perforation and rolling methods used constitute different methods for producing seamless steel pipes. The production process of welded steel pipe is to bend the tube billet (steel plate or strip) into a tube shape, and then weld the gap to become a steel pipe. Because the molding and welding methods used are different, they constitute different methods for producing welded steel pipes.

Seamless steel pipe is mainly produced by hot rolling method. The extrusion method is mainly used to produce low-plastic high-alloy steel pipes or special-shaped steel pipes and composite gold pipes that are difficult to perforate. Cold rolling and cold drawing methods can continuously process hot rolled pipes into small diameter and thin-walled steel pipes. The welding steel pipe process is simple, the production efficiency is high, the cost is low, and the product variety is expanding.