The raw material of the thick-walled steel pipe comes from the steel pipe billet, which needs to be processed into the required billet through the processing technology, and the billet is sent to the furnace for heating through a conveyor belt or the like. Since the tube blank needs to be perforated by a pressure perforator after it is released from the furnace, it is necessary to control the temperature in the furnace when it is heated in the furnace.


  After perforation, the round tube blank is successively subjected to three-roll skew rolling, continuous rolling or extrusion. After extrusion, the pipe is removed and sizing, and the steel pipe is finally formed through the punching of the sizing machine.


  The drilling process of round steel can be customized for large-diameter ultra-thick-wall seamless pipes. This method is a very convenient method to obtain ultra-thick-wall seamless pipes.


  Seamless steel pipe is a steel pipe made of a single piece of metal without seams on the surface.
  Production Process:


  ①The main production process of hot-rolled seamless steel pipe:


  Tube blank preparation and inspection→tube blank heating→piercing→tube rolling→steel reheating→diameter determination (reduction)→heat treatment→finished tube straightening→finishing→inspection (non-destructive, physical and chemical, Taiwan inspection)→warehousing


  ②The main production process of cold-rolled (drawn) seamless steel pipe:


  Billet preparation→pickling lubrication→cold rolling (drawing)→heat treatment→straightening→finishing→inspection


  Hot rolling and cold drawing are the two most common production methods for producing seamless steel pipes. The production process of cold-rolled seamless steel pipes is generally more complicated than that of hot rolling.