Paradigm busted – Pinhole detection utilising UHR Axial MFL and Caliper ILI, By: Mark Olson
With the advent of ultra-high resolution (UHR) MFL/caliper combination tools, the detection, characterisation, and sizing of true pinhole anomalies is a new frontier for axial magnetic flux leakage (MFL) inline inspection (ILI). This paper will discuss seven years of experience with UHR MFL inline inspection, challenging conventional wisdom on MFL technology.