What's Cause to Misalignment on Large Diameter SSAW Steel Pipes
Large diameter SSAW steel pipe is a spiral steel pipe with a diameter greater than 1 meter. It is formed by bending steel strip and then welding. Steel pipes are subjected to water pressure, bending, flattening and other experiments. Usually the delivery length is 12 meters, or customized length. In the production of large-diameter SSAW steel pipes, there are many influencing factors cause to misalignment. Steel pipes are degraded due to misalignment excessive tolerance. What is cause to misalignment how to prevent it? Reasons of misalignment for large-diameter SSAW steel pipes: 1. The sickle bend of the steel belt is the main factor causing the misalignment of the steel pipe. In the forming of SSAW steel pipes, the sickle bend of the steel strip changed the forming angle continuously, resulting in the change of the weld gap, resulting in seams, staggered edges or even overlapping edges, which serious affected the quality of steel pipe. Therefore, pay attention to the sickl...