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 to punch holes to form a steel pipe. The inner diameter of the steel pipe is determined by the outer diameter length of the drill bit of the sizing machine. After the steel pipe is sized, it enters the cooling tower, cooled by water spray, and the steel pipe is straightened after cooling. After straightening, the steel pipe is sent by the conveyor belt to the metal flaw detector (or hydraulic test) for internal flaw detection. If there are cracks, bubbles and other problems inside the steel pipe, it will be detected. After the quality inspection of steel pipes, they must also pass strict manual selection. After the quality inspection of the steel pipe, spray the number, specification, production batch number, etc. with paint. And hoisted into the warehouse by crane.