REMOTE-FIELDEDDY CURRENT (RFEC) TESTING is a non destructive examination technique suitablefor the examination of conducting tubular goods using a probe from the inner surface. Because of the RFEC effect, the technique provides what is, in effect,a through-wall examination using only the interior probe. Although thetechnique is applicable to any conducting tubular material, it has been primarily applied to ferro magnetics because conventional eddy current testing techniquesare not suitable for detecting opposite-wall defects in such material unlessthe material can be magnetically saturated. In this case, corrosion/erosion wall thinning and pitting as well as cracking are the flaws of interest. One advantage of RFEC inspection for either ferromagnetic or non ferro magneticmaterial inspection is that the probe can be made more flexible than saturation eddy current or magnetic probes, thus facilitating the examination of tubes with bends or diameter changes. Another advantage of RFEC inspection is that itis approximately equal (within a factor of 2) in sensitivity to axially and circumferentially oriented flaws in ferromagnetic material. The major disadvantage of RFEC inspection is that, when applied to non ferromagnetic material, it isnot generally as sensitive or accurate as traditional eddy current testing techniques.
AtITE, we use Olympus MS 5800 for Remote Field Electromagnetic Testing in various components like Heat Exchangers, Reactors, Condensers, etc. All those tubeswhich are ferromagnetic in nature like made from the alloys of Steel, Nickel,etc. are tested. We have a formidable customer base for RFET like IOCL, NFL,JLSL, etc. to name a few.
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