10+ Steel Pipe Surface Defects. If there is mold residue left on. Most of these defects are caused due to poor quality of the ingot.
Common defects of seamless steel pipe 1. One is steel bad defects, such as separation, scarring, crack, crack, hairline, bubbles, etc. The outer surface of the steel pipe is spiral or linear shape groove defects, most of which can be seen at the bottom of the ditch.
