The reason of eccentricity of straight welded steel tube

    When the whole or more than half of the steel tube blanks show misalignment, it is usually because:

    1. The opening seam is not adjusted properly;

    2. The seam pressure roller is not adjusted properly and there is no rounding;

    3. The edge is not pre-bent in place.

    When the head or tail of the billet shows misalignment, it is usually because:

    1. The orientation of the import and export rollers is wrong;

    2. The ring frame is wrong;

    3. The seam pressure roller is not well rounded, and the orientation error of a single pressure roller;

    4. The molding is not good, and the difference between the two ends of the formed tube blank is large;

    5. The slit width of the opening is above 150mm;

    6. The pressure of the hydraulic system fluctuates.