Definition(s)
Wetted Surface
Any surface that has contact with pressurized well fluid, either by design or because of internal seal leakage.
Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global Standards
Wetted Surface
Any surface which will be in contact with pressurized well fluid either by design or because of internal seal leakage.
Source: API SPEC 16C, Specification for Choke and Kill Systems, First Edition, January 1993 (Reaffirmed 2001). Global Standards