In the manufacturing process of seamless steel pipes, it will be affected by various factors such as processes.When these factors disappear, if the above-mentioned effects and effects on the seamless steel pipe cannot be completely eliminated, and some of the effects and effects remain in the seamless steel pipe, such residual effects and effects are called residual stress.

Special-shaped seamless steel pipe is a general term for seamless steel pipes with other cross-sectional shapes other than round pipes.

High pressure boiler tube is a kind of boiler tube, which belongs to the category of seamless steel tube. The manufacturing method is the same as that of seamless pipes, but there are strict requirements on the steel grades used to manufacture steel pipes.

The finished stainless steel seamless pipe, unless the use occasion is deep underground, the pipe in normal use needs to be polished to ensure that the surface is bright and beautiful. At present, the commonly used polishing methods mainly include mechanical polishing, chemical polishing, and electrochemical polishing.

The performance of ERW steel pipe can well meet the requirements of long-distance pipeline transportation of oil and gas, so it is widely used in the field of transportation.

Anti-corrosion spiral steel pipe is mainly used for anti-corrosion of the outer wall of buried or underwater steel oil, gas, water and heating pipelines.