Q:What is the difference between welded steel pipe and spiral welded pipe?

Weld shape: The weld of straight seam welded pipe is a straight line, while the weld of spiral welded pipe is a spiral line with different spiral angles.

Raw material: Straight seam welded pipe requires a specific width of raw material strip or steel plate for each specification of steel pipe. Spiral welded pipe can produce steel pipes of different diameters using the same width of strip steel.

Stress: Due to the different weld shapes, the synthetic stress at the spiral weld is 60-85% of the main stress of the straight seam welded pipe. Therefore, under the same working pressure, the wall thickness of spiral welded pipe of the same diameter can be reduced than that of straight seam welded pipe.

Production: In the production of small and medium diameter welded pipes, straight seam welded pipes have greater advantages; in the production of large diameter welded pipes, spiral welded pipes have absolute advantages.

Time：04/03/2025 17:26:58