Keywords: welded steel pipe
Welded steel pipe is a steel strip or steel plate that is bent by various shapes such as round steel and square steel and welded to the surface of the welded steel pipe.


Steel plates or steel strips are welded steel billets, which can be divided into furnace tubes, welding (ERW) tubes and automatic arc welded tubes depending on the welding process. Due to the different forms of welded pipes, they are divided into spiral welded pipes and spiral welded pipes. Its shape is divided into welded round ends and formed (square, flat, etc.) tubes.


Welded steel pipes and welded steel pipes are generally available on the market: double submerged arc welded pipe (DSAW), high frequency welded pipe (ERW), and spiral submerged arc welded pipe (SSAW). The double submerged arc welded pipe is a pipe with an opening made by a molding machine, and is then welded by double-sided submerged arc welding. Pipes are steels that use high-frequency skin effects to produce high-frequency currents. The narrow spiral submerged arc welded pipe is made of steel pipe, and is submerged arc welding and spiral welding. The longitudinal length of the weld is relatively large, and the longitudinal length is relatively large. It can be made of various large diameter steel pipes.


Longitudinal spiral steel is generally stronger than longitudinal spiral steel, which can reduce the production range of large diameter tube blanks, and can also produce tube blanks of different diameters using the same width of tube blanks. However, compared with the straight pipe of the same length, the weld length is 30 to 100%, and the production efficiency is low. Therefore, small-diameter pipes are mostly straight seam welded, and large-diameter spiral welded pipes are often used.