Straight seam steel pipe derusting technology:In the process of anti-corrosion construction of oil and gas pipelines, the surface treatment of straight seam steel pipe is a key factor determining the service life of pipeline anti-corrosion. According to research by research institutes, the life of t

In the production process of stainless steel welded pipe, intermediate heat treatment and finished heat treatment can be carried out. Because a bright surface without oxidation can be obtained, the traditional pickling process is eliminated. The use of this heat treatment process not only improves t

The production process of straight seam welded pipe is simple, the production efficiency is high, the cost is low, and the development is fast. The strength of the spiral welded pipe is generally higher than that of the straight seam welded pipe. However, compared with the same length of straight se

1. The causes of the uneven wall thickness of the spiral shape are: the uneven wall thickness caused by the adjustment reasons such as the uneven rolling centerline of the piercer, the inclination angle of the two rolls, or the reduction amount in front of the plug is too small, generally along the