Causes for Appearance Quality Imperfections of SAWH Pipe and Relevant Countermeasures

Like the internal quality,the appearance quality of the SAWH pipe plays a critical role for the overall quality thereof.Analyzed in the article are the elements responsible the appearance quality imperfections of the SAWH pipe,such as "pouted" (deviated) forming seam,and imperfections of the pipe body like groove,impression,impressed pit and scratch,and poor seam appearance,etc.,based on which,preventative and corrective actions are proposed.