Pulsed Eddy Currents (PEC)
The PEC technique does not disturb insulation or coatings and provides accurate results through aluminum, stainless steel, and galvanized steel coatings. In addition, the insulation can be hot, cold, humid, rough, embedded, uneven, heterogeneous, or even wire mesh. Due to its excellent repeatability, PEC technology is ideally suited for initial control and periodic control services.
Mainly it is a technique that allows the measurement of thickness under insulation to be able to measure the loss of thickness due to corrosion under insulation (CUI), which is a common failure mechanism in petrochemical plants and refineries.
They are used for the measurement of thickness in pipes and vessels with thermal insulation, supports of spherical vessels and equipment with superficial corrosion in which the measurement with ultrasound is not possible due to the degree of surface corrosion that does not allow the coupling of the ultrasonic transducers.