Eddy Current and Tube Inspection

Versa Integrity Group can provide you with Eddy Current (ECT), Remote Field Inspection (RFT), and Internal Rotary Inspection System (IRIS)

What is Eddy Current Inspection?

Eddy current testing (ECT) is the best method for inspection of non-ferrous tubing. It can detect and size defects affecting tubing such as steam erosion, baffle cuts, pitting, and cracking. Eddy current is especially good for detection of defects under support plates.

What is Remote Field Testing?

Remote field testing is the best method for inspection of ferrous tubing. RFT has an equal sensitivity to ID and OD indications and can detect and size defects affecting tubing such as steam erosion, baffle cuts, and pitting. Several probe designs are available for wall loss measurement, pit sizing, and flaw detection hidden by a support plate. RFT is a through-transmission technique where the receiver coil senses the flux lines that cross tube walls twice. Detector coils are separated from the exciter coil by a distance equivalent to 2 to 3 times the tube outside diameter. Remote Field Testing is suitable for carbon steel such as SA-179, SA-214, boiler tubes, ferritic stainless steel, nickel, and other ferromagnetic materials.

What is Internal Rotary Inspection System (IRIS)?

This inspection technique relies on a transducer to generate an ultrasonic pulse oriented parallel to the axis of the tube (flooded with water beforehand). Ultrasound waves are reflected by a mirror and propagate towards the tube outer wall: they are partially transmitted inside the ID wall and eventually reflected by the OD. Knowing the ultrasonic velocity of the tube material, we can assess the wall thickness using the time-of-flight difference between the two surfaces. Water circulation is rotating the mirror, ensuring the whole tube is inspected. IRIS is particularly versatile, as it is suitable for ferrous and non-ferrous materials and allows detection of corrosion, pitting and thinning on a wide range of tube diameters and wall thicknesses.

ECT, RFT, & IRIS Services

  • Heat Exchanger Tube Bundles
  • Fin-Fan Tube Inspection
  • Condensers
  • Coolers
  • Chillers
  • Various other piping and tubing applications

Please contact our office for more details on the services we perform.

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