Corrosion is a spontaneous process of materials. In nature, substances will spontaneously change from a high-energy state to a low-energy state in order to maintain energy conservation. Iron mostly exists in the form of iron ore in nature, and its state is relatively stable. When iron ore is given the energy...

At present, the mainstream gas pipelines are cast iron pipes, PE pipes and steel pipes. The materials used for steel pipes are divided into several kinds. Take 20 steel, Q345D and L290M as examples for research in this article. Some defects of the pipeline made from the above several materials are...

1.4 Crack sensitive steel types of quenching cracks Certain high-grade seamless steel pipes have a high content of alloying elements and high strength of the pipe body, so the strength factor of the stress field is relatively high. They are steel types that are sensitive to cracks. The surface...

Abstract: According to the characteristics of manufacturing processes of seamless steel pipes, combined with macroscopic morphology and microstructure analyses, it is believed that the main causes of quenching cracks in seamless steel pipes are surface defects, stress cracks and surface recarburization....

There are three kinds of pipes that can be used for conveying gas: ductile iron pipes, welded steel pipes and PE pipes.   Ductile iron pipes A ductile iron pipe refers to a pipe that is made from molten iron with the size 18 or above by adding a nodulizer, and then it passes through a centrifuge with high...

Stainless steel heat exchanger tubes have very good antioxidation properties, and are safe and sanitary, which are widely used in food, medicine, heating, domestic water, air-conditioning backflow and other fields. Stainless steel heat exchanger tubes have better heat transfer effects than those of...

Main features of coated steel pipes The anti-corrosion coating used for the coated steel pipe is the solvent free epoxy coating, and the solidified coating has corrosion resistance, hardness and compactness. The safe and reliable connection method of 3PE anti-corrosion steel pipe made from polyethylene...

The picture above shows the perforation site of seamless steel pipes. Many steel pipes with uneven thickness occur at this time, so it is very important to strictly control the perforation link.   Fine rolled steel pipes and cold drawn steel pipes may also have uneven thickness problems due...

The finished product of seamless precision steel pipe will have the problem of uneven thickness. How did it happen? Many people do not understand. Today we will talk about how the uneven thickness of seamless steel pipes such as cold drawn steel pipes, cold-rolled steel pipes and hot rolled steel pipes is caused....

In recent years, raw materials with excellent corrosion resistance are provided for processed steel products in the steel industry due to the rapid development of polymer compounds. Following the color coated steel plates, organic coated steel pipes were also developed in the late 1960s. Besides stable chemical properties,...

A heat exchanger is a device that transfers part of the heat of the hot fluid to the cold fluid, which is mainly used in the fields of petroleum, chemical boilers, metallurgy, electricity, ships, heating, refrigeration and air conditioning, machinery, food, pharmaceuticals, etc.; it can be used as a heater, cooler, condenser,...

(6) Welded steel pipe (GB3092-93) for low-pressure fluid transportation and galvanized welded steel pipe (GB3091-93). Standard: Article 1: It is suitable for pipelines for conveying water, compressed air, gas, steam, condensed water and heating system. Galvanized pipes are used for conveying water and the condensed water,...