By heating the seamless steel pipe to about 550~850 °C, after a constant temperature for one time, the carbon metal and other various alloys are uniformly dissolved in the austenite. , through the rapid cooling of quenching water, carbon and other alloys have no time to precipitate, and pure austenite structure is obtained, which is called solid solution treatment.

With the advancement of welding and inspection technology, the quality of welds has been continuously improved, the varieties and specifications of welded steel pipes have been increasing, and seamless steel pipes have been replaced in more and more fields.So what should be paid attention to in the installation process of welded pipes?

When cold drawn seamless pipe is bent and deformed, they can continue to be used as long as they can be corrected, otherwise it will affect the use of cold drawn seamless tubing.

Seamless pipe without quenching hardness less than HRC28, relatively soft, not wear-resistant; quenched hardness can be (note that it can be) greater than HRC55, wear resistance is better, but this is a small cross-section, the cross-section is slightly larger, the hardness obtained will be reduced.

In the construction of pile foundations, concrete square piles and pipe piles are involved, and these two types of piles are different from each other in terms of appearance and characteristics.

The quality of cs seamless pipe billet requirements with the perforation process is closely linked. The selection of a reasonable perforation, change the unfavorable stress state, can prevent defects, but also to reduce the requirements of seamless steel pipe billet.