Welded Steel Pipe

What is Welded Steel Pipe?

Welded steel pipe refers to the steel strip or steel plate bending deformation into circular, square and other shapes after welding, the surface of the joint steel pipe, welded steel pipe using steel plate or strip steel. According to different welding methods, welded steel pipe can be divided into arc welding pipe, high frequency or low frequency resistance welding pipe, gas welding pipe, furnace welding pipe, Bondi pipe and so on.

Welding steel pipe according to weld shape can be divided into straight seam welding pipe and spiral welding pipe. The advantages of direct seam welded pipe are simple production process, high production efficiency, low cost and rapid development. The advantage of spiral welded pipe is that the strength is higher than that of straight seam welded pipe, the welded pipe with larger diameter can be produced with narrower billet, and the welded pipe with different diameter can be produced with the same width blank. But compared with the straight seam pipe of the same length, the weld length is increased by 30~100%, and the production speed is lower. Therefore, the smaller diameter welded pipe mostly adopts direct seam welding, and the large diameter welded pipe mostly adopts spiral welding. Spiral welded steel pipe can be divided into automatic submerged arc welded steel pipe and high frequency welded steel pipe according to welding technology.

According to the purpose of welding steel pipe can be divided into general welding pipe, galvanized welding pipe, oxygen blowing welding pipe, wire casing, metric welding pipe, roller pipe, deep well pump pipe, automobile pipe, transformer pipe, welding thin wall pipe, welding special-shaped pipe and spiral welding pipe. Welded steel pipe according to end shape can be divided into circular welded pipe and irregular (square, flat, etc.) welded pipe.