Eddy Current Testing

Eddy current testing is one of the best NDT techniques for tubing, bar none.

Eddy Current Testing (ECT)

Eddy current testing (ECT) w/ Eddyfi is the best NDT method for inspection of non-ferrous tubing, period. Eddy current can detect and size defects affecting tubing such as steam erosion, baffle cuts, pitting, and cracking. Furthermore, ECT is a proficient NDT method for detection of defects under support plates.

Remote Field Testing (RFT)

Remote field testing (RFT) w/ Eddyfi is an excellent method for inspection of ferrous tubing. RFT eddy current has an equal sensitivity to ID and OD indications and can detect/size defects just like conventional eddy current testing. The main difference between conventional eddy current and RFT is RFT’s suitability for carbon steel, such as: SA-179, SA-124, boiler tubes, ferritic stainless steel, nickel, and other ferromagnetic materials; while eddy current testing is only suitable for inspection of non-ferrous counterparts.

Internal Rotary Inspection System (IRIS)

Internal Rotary Inspection System (IRIS) w/ Eddyfi relies on a transducer to generate an electronic pulse oriented parallel to the axis of the tube (flooded with water beforehand). The advantage of IRIS eddy current is its suitability for ferrous or non-ferrous materials. IRIS detects corrosion, pitting, and thinning on a wide range of tube diameters, wall thicknesses, and materials themselves. The only potential downside to this method is the necessity of the part being flooded with water.

Eddy Current Array (ECA)

Eddy current array (ECA) with Eddyfi has several advantages over the previously mentioned eddy current methods. For one, there is a lesser need for complex robotics to move the probe; complex shapes can be inspected because the probes are customized to fit the part profile, unlike conventional eddy current; and larger areas can be scanned at one time with a higher resolution than the other techniques.

Near-Field Testing (NFT)

Near-field testing (NFT) with Eddyfi is specifically designed to reliably test aluminum-finned carbon steel tubes of overhead heat exchangers (coolers). There are oftentimes the most difficult pieces of equipment to inspect, but NFT eddy current is made for the job. Additionally, construction of the NFT array probe also allows the analyst to understand the morphology of the degradation, and characterize with precise measurements. This, in turn, reduces the chance of miscall events. Saving you considerable time and headache required when re-tests happen.

Why Versa?

Although eddy current is an advanced NDT service, many NDT providers offer it as part of their service suite. With that in mind, why would you choose Versa Integrity Group to manage your eddy current testing? Easy. We have the experience and technical know-how of all the above methods, so we can quickly determine whether conventional eddy current would work for your application, or if near-field testing (NFT) would be better suited. Finally, NDT is only one part of our comprehensive asset integrity management service suite. If you are searching for that sole source provider to handle your facility’s mechanical integrity, you just found it. We are the unified solution.


  • Heat exchanger tube bundles
  • Fin-fan tube inspection
  • Condensers
  • Chillers
  • Vessels
  • Columns
  • Storage tanks
  • Spheres
  • Piping and structural applications
  • And more…

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