Shallow Flaw or Discontinuity : A discontinuity which as little depth in proportion to wall thickness and does not exceed critical flaw size of the appropriate specifications. (RP 5A5)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}