Nowadays, with the advancement of
seamless steel pipe technology and the increase in demand, there are many types of seamless steel pipes. Everyone feels so confused when they choose. Among them are hot-expanded steel pipes and seamless steel pipes. Today, I will explain to you the differences between the two types of steel pipes.
In general, both the hot-expanded steel pipe and the seamless steel pipe have strict requirements on the steel used for the manufacture of the steel pipe. The hot-expanded steel pipe is only a manufacturing process of the steel pipe, and the small-diameter steel pipe is processed into a large-diameter steel pipe.
Thermal expansion steel pipe: First of all, in the appearance of the steel pipe, the heat expansion is red, and the inner diameter is lead powder.
The steel pipe to be thermally expanded has strict requirements on the quality of steel grades, and it is usually necessary to use a steel pipe having a high shrinkage property and a rough pipe finishing process of expanding the pipe diameter by a cross-rolling method or a drawing method. In this way, the steel pipe is thickened in a short period of time, and is used for producing non-standard, special-type seamless pipes, which have low cost and high production efficiency. However, such a thermal expansion pipe is slightly inferior in mechanical properties to hot rolled steel pipe.
Because of its reasonable process, low thermal energy expansion, good quality is getting better.
