The wall thickness can be called thick-walled steel pipe. There are some doubts about this. It depends on the ratio of the outer diameter of the steel pipe to the wall thickness of the steel pipe. For example, a steel pipe with a diameter of 50 mm, 10 mm can be regarded as a thick-walled steel pipe.

Stainless steel pipes are explosion-proof. The pressure-bearing and explosion-proof ability of stainless steel pipes depend on the wall thickness of the pipe. If thick-walled stainless steel pipes are used, it is no problem to withstand pressures of 10Mpa (about 100 kg) or even higher. Threeway Stee

The stainless steel flange is not completely rust-proof, but its oxidation resistance is stronger than that of ordinary steel, so it is called stainless steel.Stainless steel not only can resist atmospheric oxidation, but also can corrode in acid, alkali, and salt media. However, the size of its cor

API casing threads are not suitable for the development of high-pressure gas fields, so many manufacturers have developed special joints with their own characteristics. Among them, the gas-sealed special joint thread types suitable for the development of gas fields are:1. NS-CC thread (developed by

(1) ASTM A179 cold drawn steel pipe with carbon steel pollution: contact with carbon steel caused by scratches and corrosive media to form the original battery and electrochemical corrosion.(2) ASTM A179 cold drawn steel pipe cutting: slag, splash and other easy to rust the material attached to the

Polishing methods of seamless steel tubes are as follows:Mechanical polishing1. The advantage is that the parts are smooth and the brightness is high after processing. The disadvantage is that the intensity of labor is too great, resulting in serious pollution, and can not process complex parts, the

In the production process of large-diameter steel pipes, since the primary processing is performed in a hot state, the heating operation is a very important process that determines the quality of the product. Heating furnaces are divided into heating furnaces and reheating furnaces according to thei

At present, the proportion of oil and gas transported by longitudinally welded pipes in the world is increasing, accounting for about 75%-95% of the total oil and gas. At present, the scope of transportation is gradually expanding, not only petroleum and natural gas, but also various chemical indust

1. Check if the composition of the steel is uniform. Because of the inferior seamless steel pipe, there are more impurities in the pipeline, and the density of the steel is smaller. Once we found that the composition of the pipeline is confusing from the section of the pipeline, then this must be a