Straight seam pipe in the production, the wrong side have occurred, many of its influencing factors. In production practice, often by the wrong side of the error so that steel pipe demotion. Therefore, it is necessary to analyze the cause of the wrong edge of the straight seam pipe and the precautionary measures.

1, the sickle bend steel strip is the most important factor in the wrong side of the pipe. In the spiral pipe molding, the sickle bend steel strip will continue to change the forming angle, resulting in weld gap changes, resulting in open seam, the wrong edge or even take the edge. Seriously affecting the quality of the steel pipe, so the observation of the sickle bend after the uncoiling of the steel strip, by controlling the vertical roller so that the disc can be cut off part of the sickle bending and forming angle of the continuous control and correction is to reduce the production process sickle bend The wrong way to create an effective way.

2, due to the non-trimming of steel head and tail shape and size of poor accuracy, easy to cause when the steel strip bending caused by the wrong side.

3, the head and tail of the steel butt welding weld residual height larger, over-molding if handled properly, likely to cause greater wrong edge.

4, the edge of the strip poor condition is another important reason for the wrong side.