압력용 튜브

With the above basic process, the billets become pipes, then according to different requirements, the pipes would then receive heat treatment, cooling, straightening and other tests. Generally, the common manufacturing process of seamless stainless steel tube is as follows:

 

Comparison of Hot Rolled & Cold Rolled SS Steel Pipe

While seamless steel pipes can be formed into hot and cold rolled technique. How to distinguish hot and cold rolled seamless stainless steel pipe?

1.Advantages of hot rolled process

Hot rolled seamless steel pipe can damage the casting structure of the steel ingot, refine the crystal grains of the steel, and eliminate the defects of the microstructure. In this way, the steel organization is compacting and the mechanical properties would be improved.
This improvement is reflected in the rolling direction, so that the steel is no longer isotropic to a certain extent; bubbles, cracks and looseness formed during casting can also be welded under high temperature and pressure.

2.Advantages of cold rolled process

Forming fast, high output and no damage to the coating, cold rolled seamless stainless steel tubes can be made into a variety of cross sectional forms to meet the needs of the use of conditions.
In addition, cold rolled process can cause great plastic deformation, so as to improve the yield of the steel point.