Definition(s)
Corrosion Allowance
Additional material thickness available to allow for metal loss during the service life of the vessel component.
Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards
Corrosion Allowance
Material thickness in excess of the minimum required thickness to allow for metal loss (e.g. corrosion or erosion) during the service life of the piping component.
- NOTE: Corrosion allowance is not used in design strength calculations.
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
Corrosion Allowance
Amount of wall thickness added to the pipe or component to allow for corrosion/erosion/wear.
Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards
Corrosion Allowance
Amount of wall thickness added to the pipe or component to allow for corrosion, scaling, abrasion, erosion, wear and all forms of material loss.
Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards
Corrosion Allowance
Extra wall thickness added during design to compensate for any anticipated reduction in thickness during the operation.
Source: Offshore Standard DNV-OS-C101, Design of Offshore Steel Structures, General (LRFD Method, Det Norske Veritas, April 2011. Global Standards