DentA local change in pipe surface contour caused by an external force such as mechanical impact or rock impingement but is not accompanied by loss of metal. with an abrupt change in the curvature of the pipe wall if any radius of curvature in the dent is ≤ 5 times the wall thickness. This type of dent might also be associated with wall thickness reduction or crackA fracture or discontinuity in the wall of a pipeline, where the material is separated or broken, potentially compromising the integrity and safety of the pipel….