1,
LSAW steel pipe raw materials used by steel edge is another important reason for the poor condition of the wrong side of the result.
2, LSAW steel pipe with steel head and tail butt welding weld reinforcement material is large, when the over-molding, if not handled properly, likely to cause greater wrong side.
3, LSAW steel pipe raw materials used in steel due to the poor is not trimming the strip head and tail shape and dimensional accuracy, it could easily lead to the strip hard bend butt caused the wrong side.
4, LSAW steel pipe molding, steel camber angle will constantly change shape, leading to changes in the weld gap, resulting in open seam, wrong side or even take sides. Camber is caused by strip steel on the wrong side of the most important factors. Seriously affecting the quality of steel pipe.
In large diameter thick wall straight seam steel pipe production, the emergence of the wrong side of the case occurred when the Austrian Grand prompted the manufacturers to do for the way to deal with this phenomenon, try to improve their large diameter straight seam steel pipe quality, thus boosting sales.
