permanent

Before introducing the welding process of the welded pipe, let us first understand the classification of the welded pipe. Classified by use, it is divided … Read more

Steel pipes are mainly divided into seamless steel pipes and welded steel pipes. There are two kinds of welded steel pipes: one is straight wire … Read more

The ceramic-lined steel pipe is made by self-propagating high-temperature synthesis-centrifugal method. The melting point of corundum in the ceramic steel pipe is 2045 °C. The … Read more

The use of seamless steel tubes is very good, and we can see seamless steel pipes in many places. The seamless steel pipe has a … Read more

Hardenability refers to the material characteristics characterized by the depth and hardness distribution of the sample under the specified conditions, which depends mainly on the … Read more

The spiral steel pipe shall be subjected to mechanical performance test, flattening test and flare test before leaving the factory, and shall meet the requirements … Read more