What Is Electric Resistance Welded Tube

Electric resistance welded steel pipes are divided into AC welded steel pipes and DC welded steel pipes. AC welding is divided into low frequency welding, intermediate frequency welding, super intermediate frequency welding and high frequency welding according to the frequency. High-frequency welding is mainly used for the production of thin-walled steel pipes or ordinary wall-thick steel pipes, and high-frequency welding is divided into contact welding and induction welding. DC welding is generally used for small diameter steel pipes. Therefore, in general, the high-frequency welded pipe is included in the ERW welded pipe, which is a kind of ERW welded pipe produced by the high-frequency welding process. ERW longitudinal welded pipe is a steel pipe with advanced product performance, leading quality and relatively economical in the field of oil and gas storage and transportation.

1. Welded pipes are round pipes welded by steel plates, which are divided into high-frequency electric resistance welded pipes (ERW pipes), straight seam arc welded pipes (LSAW), and spiral welded pipes.
In electrical engineering, "SC" is used to indicate that it can be used as a water gas pipe or a threading pipe, and it is relatively thick.
2. The line pipe is also the wire pipe, which is relatively thin and is represented by "T", and it can only be used as a threading pipe. 3. ERW pipe is a "high-frequency resistance welded steel pipe". It is different from the welding process of ordinary welded pipes. The weld seam is formed by melting the base material of the steel strip body, and its mechanical strength is better than that of ordinary welded pipes.
ERW means resistance welding. Resistance welding has the characteristics of high production efficiency, low cost, material saving, and easy automation. Therefore, it is widely used in various industrial sectors such as aviation, aerospace, energy, electronics, automobiles, and light industry. It is one of the important welding processes. one.

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