From the point of view of the welding process. Whether it is a straight seam steel pipe or a spiral steel pipe, the welding methods of the two are the same. However, in the actual welding process, there are often many T-shaped welds in the longitudinally welded pipes. There are often some residual stresses in such welds. Although this does not have much impact on the application, it is precisely because These residual stresses increase the possibility of cracks in the straight seam steel pipe.
Fundamentally speaking, spiral steel pipe or straight seam steel pipe is a kind of welded steel pipe. Because of their superior functions, these two steel pipes are widely used in various projects. Of course, because the two production processes are different, they are in practice. There is still a big difference in the application process, which directly leads to a big difference in the application range of the two steel pipes.

Compared with spiral steel pipes, the manufacturing process of straight seam steel pipes is much simpler. The production process of straight seam steel pipes is mainly divided into two types, one is high-frequency welded straight seam steel pipe, and the other is submerged arc welded straight seam steel pipe. It is precisely because of these characteristics that the production process of the straight seam steel pipe is simple, the production power of the straight seam steel pipe is very high, the cost is low, and the development speed is also very fast.

The production of large-diameter straight seam steel pipes in the industry will use T-shaped welding technology, which is to splice the short sections of the straight seam steel pipe into a length that meets the engineering requirements, which greatly increases the probability of T-shaped welding defects in the straight seam steel pipe. In addition, the welding residual stress at the T-shaped weld is relatively large. The weld metal tends to produce a stress effect, which increases the possibility of cracks.