The quality of the tube billet is the basic factor that determines the quality of seamless steel tubes for medium and low pressure boilers.

In order to align the nose of the hot-rolled seamless steel pipe with the front end of the tube blank during piercing, a shallow circular hole is processed at the front end of the tube blank before the tube blank is pierced. This process is called centering.

The heat treatment methods of seamless steel pipes are spheroidizing annealing and isothermal annealing. What are their functions and purposes?

According to statistics of seamless steel pipe technical data, 80% of steel pipe fractures are caused by fatigue.

In order to accurately determine the tempering temperature in heat treatment of seamless steel pipe, it is necessary to determine the tempering temperature according to the tempering color.

In the process of production, machining, welding, testing and heat treatment of seamless steel pipes, the surface area of ​​seamless steel pipes (carbon copper pipes, stainless steel pipes) will accumulate iron oxide, welding slag, grease and other dirt, making the seamless steel pipe resistant to Corrosion performance becomes stronger.