Standard Practice for Electromagnetic (Eddy-Current) Examination of Copper and Copper-Alloy Tubes
Eddy-current examination is a nondestructive method of locating discontinuities in a product. Signals can be produced by discontinuities located either on the external or internal surface of the tube or by discontinuities totally contained within the walls. Since the density of eddy currents decreases nearly exponentially as the distance from the external surface increases, the response to deep-seated defects decreases.
