For spiral welded pipe, the service life is the most important part of the buyer, and the most important part of the service life of spiral welded pipe is to keep the surface of the steel pipe from decarburization. It is well known that after the surface of spiral welded pipe is decarburized, its st

From the appearance point of view, there are two differences between oil casing and oil drill pipe:1. The usage of products2. The material of products As we know, the oil casing is a steel pipe used to support the wall of oil and gas wells. Its function is to ensure the normal operation of the entir

The spiral steel pipe is treated like a steel strip in the spin direction of the coiling machine...