The Difference Between Straight Seam Steel Pipe And Spiral Steel Pipe

- Jun 30, 2017 -

Straight seam steel pipe and spiral steel pipe are welded steel pipe, they have been widely used in national production construction, straight seam steel pipe and spiral steel pipe because their production process is different, so there are many differences, the following specific discussion of straight seam steel pipe and spiral steel pipe difference. Straight seam welded pipe production process is relatively simple, the main production process has high-frequency welding straight seam steel pipe and submerged arc welding straight seam steel pipe, straight seam pipe production efficiency, low cost, development faster. Spiral welded pipe strength is generally higher than the longitudinal welded pipe, the main production process is submerged arc welding, spiral steel pipe can use the same width of the billet production of different pipe diameter, you can also use a narrower billet production pipe diameter larger. But compared with the same length of straight seam tube, the weld length increases $number and the production speed is lower. Therefore, the smaller-caliber welded pipe mostly adopts straight seam welding, and the large diameter welded pipe is mostly spiral welded. In the construction industry, the production of large diameter straight seam steel pipe will use the tack welding technology, a short section of straight seam steel pipe to be connected again, to meet the needs of the project length, T-shaped straight seam steel pipe defects of the probability is greatly improved, and the welding residual stress in the weld, weld metal is often in a three-way stress state, increasing the likelihood of cracking.

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