Defects on the inner surface of hot rolled seamless tubes

Date: 2020-07-07

Defects on the inner surface of hot rolled seamless tubes Defects on the inner surface of hot rolled seamless tubes Inner folding plate: Straight, spiral or semi-spiral serrated defects appear on the inner surface of the steel pipe. Internal scars: The scars on the inner surface of the steel pipe are generally easy to peel off. Warping: Straight or intermittent small spike-like inclined leather. Common in capillary head, and easy to peel. Straight inside: Straight scratches with a certain width and depth. Inner edge: a straight-shaped protrusion with a certain width and depth. Inner drum kit: Super regular bumps and outer surface are not damaged. Pulling pits: regular or irregular pits, the outer surface of which is not damaged. Internal thread: Spiral marks are often seen on the surface of thin-walled tubes, and there is a noticeable unevenness. Post time: Jul-07-2020

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