Overexertion on the "welded spiral steel pipe" can cause the molten metal to be in a compressed state during the spiral welding process.

Excessive weld gap in spiral steel pipes reduces the adjacent effect, resulting in insufficient eddy current heating, poor weld crystallization, and indirectly un熔d welds or cracking in spiral-welded pipes.

If the gap is too small, it enhances the near-forming effect, and excessive hot welding can cause weld seam combustion. By kneading the weld seam, indentations can form after rolling, affecting the welding surface quality of the pipe. By heating to the two extreme temperatures for welding, kneading on the kneading roller, the metal particles interpenetrate and crystallize together, and then the spiral pipe welding is completed. If the clamping force is too great, the number of crystals formed together will be fewer, the strength of the weld metal will decrease, and cracks may appear after stress. Spiral Welded Pipe