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Technology Application
LFET RFET BFET ECT Ultrasound OSET Support

TesTex uses a variety of state-of-the-art electromagnetic techniques to scan for defects in both ferrous and nonferrous materials and structures.


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LFET RFET BFET ECT Ultrasound OSET Support
Boiler Tubes AGS Tanks Pipelines Feedwater Heaters Heat Exchangers Finned Tubes Condensers Welds
Radio Field Electromagnetic Technique Triton RFET
Balance Field Electromagnetic Technique Triton BFET
Off Surface Electromagnetic Technique OSET - Scout
Ultrasonic Inspection Helix XT IRIS Echo 20/20

This is a great place to check out Technical papers, Case Studies, Videos and Testimonials related to our specialized non-destructive testing products and services.

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Boiler Tube Inspections

Boiler Tube RFET Inspection

Generating Banks and Tubular Air Heaters: In drum-to-drum boilers, TesTex, Inc utilizes the Eagle 2000 RFET Inspection System to perform full length tube inspections from either the mud drum or steam drum. With its flexible probe design, the Eagle 2000 RFET Inspection System can both detect and quantify flaws in straight sections as well as the bends of the generating tubes. TesTex also inspects tubular air heaters when present on certain boilers.

Boiler Waterwall Map
Diagram from a waterwall report.

Waterwalls, Super Heaters and Reheaters: In larger industrial and utility boilers, TesTex, Inc. utilizes the TS-2000 Tube Scanning System and the principles of the Low Frequency Electromagnetic Technique (LFET) to detect I.D. and O.D. flaws on the hot side of the tube. The system enables a continuous 120 degree scan of the tube surface with a single pass of the scanner. Any non accessible areas, such as around bends, viewports, sootblowers, etc. that can not be scanned, are UT spot checked to provide a 100% complete inspection. Typically in gas and oil boilers, no surface preparation is needed for the LFET inspection. In boilers that use coal as a fuel source, a high pressure water blasting may be required.

Waterwall Corrosion Cell
Waveform shows a corrosion cell in a waterwall boiler tube.

Specialty Boiler Tube Inspection Applications

TesTex, Inc has the ability to detect the following failure mechanisms:

  • Graphitization
  • Thermal Fatigue Cracking
  • Corrosion Fatigue Cracking
  • Magnetite Detection
  • Near Drum Corrosion

Please visit our Solution Providers Group page for additional information on our specialty boiler tube inspection applications.

TesTex Advantages

  • RFET and LFET have the capability to inspects straight sections and bends
  • 350 – 450 generating bank tubes can be inspected using RFET in a single twelve-hour shift
  • 2,000 – 3,000 linear feet can be scanned using LFET in a single twelve-hour shift
  • More than 40 inspection crews can be deployed at any given time
  • Crews are equipped with multiple scanner/probe sizes and back-up equipment to avoid downtime
  • Neither RFET nor LFET require extensive tube cleaning
  • Can inspect tubing from with diameters one-half inch and greater
  • Both TesTex RFET and LFET get more area coverage than the other respective techniques
  • All data is collected and stored for future reference

Click here to view our waterwall inspection services video.


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