Definition(s)
Surface Finish
Measurement of the average roughness of a surface.
Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global Standards
Surface Finish
The measurement of the average roughness (RMS) of a surface. All of the surface finishes given within this specification are to be considered maximums.
Source: API SPEC 16RCD, Specification for Drill Through Equipment—Rotating Control Devices, Upstream Segment, First Edition, February 2005. Global Standards