Definition(s)
Internal inspection
An inspection performed from the inside of a pressure vessel using visual and/or NDE techniques.
Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards
Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards
Internal Inspection
An inspection performed on the inside surface of a piping system using visual and/or NDE methods (e.g. boroscope).
NDE on the outside of the pipe to determine remaining thickness does not constitute an internal inspection.
Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards
Internal inspection
Evaluation performed from the inside of a pressure vessel using visual and/or NDE procedures to establish the suitability of the vessel for continued operation.
Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards