In the production process of stainless steel seamless pipes, a series of complex procedures need to be carried out.These procedures include: starting from round steel, going through re-inspection, peeling, blanking, centering,heating, piercing, pickling, facing, inspection and grinding, cold rolling (cold drawing), degreasing,heat treatment, straightening, pipe cutting (fixed length),... https://www.sinosteel-pipe.com/en/production-process-of-stainless-steel-seamless-pipes.html