How To Distinguish Between Seamless Steel Pipes and Hot Expanded Steel Pipes

Nowadays, with the development of seamless steel tube technology and the increase of demand, there are many kinds of seamless steel tube. Everyone is so confused when they choose. It includes thermal expansion steel pipe and seamless steel pipe. Today, I will explain to you the difference between the two kinds of steel pipes.


Generally, both the thermal expansion steel pipe and the seamless steel pipe have strict requirements for the steel used to manufacture the steel pipe. Thermal expansion steel pipe is just the manufacturing process of steel pipe, small diameter steel pipe is processed into large diameter steel pipe.


Thermal expansion steel pipe: first of all, in the appearance of steel pipe, the thermal expansion is red, and the inner diameter is lead powder.


Thermal expansion steel pipe has strict requirements on the quality of steel grades. It is usually necessary to use steel pipes with high shrinkage and to expand the pipe diameter by cross rolling or expanding the rough pipe finishing process. Drawing method. In this way, the steel pipe thickens in a short time, and is used for non-standard, special seamless pipes with low production cost and high production efficiency. However, the mechanical properties of the thermal expansion tube are slightly worse than that of the hot rolled tube.


Due to its reasonable process, low thermal expansion, good quality is getting better and better