6479 thin-walled seamless steel pipe sales  

The raw material of thin-walled seamless steel pipe is round pipe blank, which is cut and processed by a cutting machine to a blank with a length of about 1 meter, and sent to the furnace for heating through a conveyor belt. The billet is fed into a furnace for heating at a temperature of about 1200 degrees Celsius. The fuel is hydrogen or acetylene. Temperature control in the furnace is a key issue. After the round tube blank is out of the oven, it is pierced by a pressure perforating machine. Generally, the more common perforating machine is the conical roller perforating machine, which has high production efficiency, good product quality, large perforation and diameter expansion, and can penetrate a variety of steel grades. After perforation, the round tube blank is successively obliquely rolled, continuously rolled or extruded by three rolls. After extrusion, it should be de-pipe and sized. The sizing machine rotates into the steel embryo at high speed through a conical drill bit t…