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Eddy current is a noncontact method used to inspect non ferromagnetic tubing. In this technique, the probe, which is excited with an alternating current, induces eddy currents in the part that is under inspection. Any discontinuities or material property variations that change the eddy current flow in the part are detected by the probe as a potential defect. This technique is suitable for the detection and sizing of metal discontinuities such as corrosion, erosion, wear, pitting, baffle cuts, wall loss, and cracks for nonferrous materials includ- ing austenitic stainless steel such as SS304/SS316, brass, copper-nickel, titanium, copper-finned, Monel, and others.

For tube inspections, multi frequency eddy currents can locate and size defects under support plates and at the tube sheet. Eddy current equipment is perfectly suited for the inspection of condensers, feed water heaters, air conditioners, and surfaces.

ECT /  Eddy Current  Inspections