Carbon steel welded pipe production process
Carbon steel welded pipes are mainly divided into three processes: electric resistance welding (ERW), spiral submerged arc welding (SSAW) and straight seam submerged arc welding (LSAW). The carbon steel welded pipes produced by these three processes have their own positioning in the application field because of their different raw materials, forming processes, caliber size and quality. 1. Straight seam electric resistance welded pipe (ERW) Electric resistance welded pipe is the earliest type of steel pipe produced in my country, with the widest range of applications, the largest number of production units (more than 2,000), and the highest output (accounting for about 80% of the total production capacity of welded pipes). The product specification is Ф20~610mm. played an important role. Since the 1980s, about 30 sets of ERW219-610mm units have been imported from abroad. After years of production practice, the equipment technology level has made great progress, and the product quality i...