Internal Rotary Inspection System (IRIS) Ultrasonic Inspections of Heat Exchanger Tubes

KAOTHEEM uses IRIS to detect general corrosion/erosion and localized volumetric defects such as pitting, fretting, and others in ferrous (carbon steel tubes such as SA214 and SA179 tubes) and non-ferrous (stainless steel) tubes. IRIS measures tube wall thickness values based on ultrasound pulse echo techniques.

INSPECTION PREPARATION
Thorough internal tube cleaning is essential to obtain clear reliable results. The technique needs water as a couplant.

ADVANTAGES

  • IRIS measures the absolute wall thickness value, as well as the internal and external diameters of the tube.
  • Is accurate to +/- 0.005”
  • Can be used for ferrous and non-ferrous tubes.
  • Is excellent for identifying support wear.

LIMITATIONS

  • This technique cannot detect cracking.
  • Internal cleaning must allow access to heavy scale and debris free surfaces.
  • Compared to techniques such as eddy current, the scan speed is slower. The pulling speed; 2 in/s.

REPORTS

All indication calls detail the severity of the flaw(s), its (their) location in the tube, and if it is (they are) ID/OD initiated. This information is built to scale in an accurate 3D rendering of the exchanger.

Below are different images obtained while examining for ID pits in finfans and heat exchangers

Internal Rotary Inspection System (IRIS) Ultrasonic Inspections of
Heat Exchanger Tubes

KAOTHEEM has been serving the oil and gas, petroleum and petrochemical, chemical, power generation, pipeline and potash industries since 2016.

As one of the indigenous NDT companies in Africa, we are owned and operated by our Highly Trained Employees and Team of Professionals, Inventors & Technologist Partners across the globe.

No 133 spring bank road HU31BL
Hull Yorkshire
United Kingdom

Email: info@kaotheem.com

Website: www.kaotheem.com

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