Common methods for 3PE anticorrosive steel pipe anti-corrosion:1. Pipeline anticorrosion generally uses two main methods commonly used: outer coating and cathodic protection.2. Although most of the surface of the pipeline is covered by the coating, an incredible corrosion rate will occur if there is

First of all, it may be due to the stress of the spiral welded steel pipe. That is, the residual stress and welding stress after the steel pipe is formed.Secondly, due to the presence of hydrogen. If the flux is not dried enough, the preheating temperature is insufficient or the p

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