Eddy Current Testing (ET)

Eddy Currents are closed loops of induced current circulating in planes perpendicular to the magnetic flux. They normally travel parallel to the coils winding and the flow is limited to the area of the inducing magnetic field. Eddy Currents concentrate near to the surface adjacent to an excitation coil and their strength decreases with distance from the coil i.e. Eddy Current density decreases exponentially with depth. Eddycurrent testing is a rapid and accurate technique used to detect discontinuities in tubing, heat exchangers, condensers. IRC has defecto-meters working on the principle of eddy current testing, i.e., it has a probe coil which can also detect surface and near surface discontinuities in the turbine blades. Eddy current testing is also performed for alloy separation i.e, sorting and for the determination of treatment conditions. The location of repair welds, girth welds and seam welds may also be detected on ground machined surfaces. IRC is having OLYMPUS MS-5800 and TECHNOFOUR Machine using which we are performing Eddy-current and Remote Field Eddy-Current Services. IRC has even carried out successfully these services in Saudi Arabia for SAFCO Plant. IRC can take such kind of jobs for overseas shutdown jobs.

Applications

1. This Technique is usually used for Inspection Heat Exchanger Tubes.
2. Sorting of Components.
3. Detection of Defects in Turbine Blades.