Is it to perform MT on Dish End after forming

Is it necessary to perform MT on Dish End after forming.
material 516 gr 70
thickess 14mm

or we can perform PT instead of MT

answer according to ASME section 8


Header of vessel after forming shall make certain actual wall thickness is not less than the design thickness requirements.
Read more: UG-79 (d):


Additional NDT

  • MT or PT to make certain free defects on surface.
  • UT thickness measurement to make certain actual thickness after forming are not less then specified design wall thickness.
    image .


  • MT/PT reports.
  • UTM report.
  • Dimension inspection reports.

MT/PT are specified in ITP or Client spec.
See note 72:


Do we perform 100% MT/PT of both sides?

Great reply…Thanks alot TOM