SSAW steel pipe means spiral pipe, which is made of hot-rolled steel plates. Adjust the squeeze roll to control the weld gap at 1~ 3mm, and make the both ends of the welding joint flush.

1. If the gap is too big, the weld will not be fused or cracked due to poor intercrystalline joints.

2. If the gap is too small, it will cause the weld to burn or affect the surface quality of SSAW steel pipe. So a firm weld seam is very important. If the extrusion force of the SSAW steel pipe is too small and the weld metal strength is low, it is easy to cause to crack; if the extrusion force is too large, the molten metal will be squeezed out of the weld, which not only reduces the weld strength, but also produces a lot of The internal and external burrs may even cause welding seam or other problems.