Hot Rolled Seamless Steel Pipe

Hot rolled seamless steel pipe is generally manufactured on automatic pipe rolling mill. After being checked and cleaned the surface defects, the solid pipe billet is cut into the required length. After centering on the head face of the hole boring end, send the pipe billet into heating furnace to be heated and then use the perforating machine to bore holes. The inside of pipe billet gradually becomes empty, which is called hollow billet. Then send the hollow billet to the auto pipe rolling mill to be rolled continuously. At last, use the pinch pass mill to make the wall thickness be even and use the sizing mill for sizing to achieve standard hot rolled seamless steel pipe. It is an advanced method to use continuous pipe rolling mill in manufacturing hot rolled seamless steel pipes.

Classification of Hot Rolled Seamless Steel Pipe
Hot rolled seamless steel tubes are generally grouped into general steel tube, low- and medium-pressure boiler steel tube, high-pressure boiler steel tube, alloy steel tube, stainless steel pipe, petroleum cracking steel tube, geology steel tube, and other steel tubes.

Manufacturing Process of Hot Rolled Seamless Steel Pipe
Round pipe billet→ heating→ boring→ three-roll helical rolling, tandem rolling or extruding→ detaching pipe→ sizing or reducing→ cooling→ semi-finished pipe→ straightening→ hydraulic testing for fault detection→ marking→ entering warehouse

Technical Parameters of Hot Rolled Seamless Steel Pipe

Advantage
Hot rolling can destroy the cast structure of steel ingot, thin the crystal particle of steel, and eliminate the disadvantage of microscopic structure, thereby improving the steel's mechanical property along the rolling direction. In this way, the steel is not isotropic body. Under high temperature and pressure, the bubbles, crackles and loosened places can also be closed.
Meanwhile, under the high temperature of hot rolling, the rolled piece has small resistance to deformation and can be deformed to a large extent. For instance, the thickness of continuously cast bloom is generally about 230mm. After rough rolling and precision rolling, the final thickness is 1~20mm.

Thank you for visiting Shengtian Group Seamless Steel Pipe Company's website! As a major hot rolled seamless steel pipe manufacturer and supplier in China, we can produce a variety of industrial pipes. Our seamless steel pipes are widely applied to electric power, chemical, petrochemical, pharmacy, and boiler, heat supplying, shipbuilding and other fields. With reliable quality and low price, our products are very popular in the international markets. For more information, please turn to product page, or contact us directly! We at Shengtian Company will offer you satisfactory service!