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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

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OSET – Scout

Scout Unit

TesTex has developed an innovative system for the detection of Corrosion Under Insulation (CUI) using our proprietary Off Surface Electromagnetic Technique (OSET).
The Scout system allows you to pinpoint the areas that require attention, instead of needlessly stripping insulation or doing thickness checks.

Advantages and Features

  • One or two-man operation
  • Portable all-in-one electronics with 10.1″ (257 mm) sunlight-readable touch screen
  • AC or DC power
  • A True scanning technique with high throughput
  • Light-weight scanner design that fits most piping, vessels, and tanks starting at 2″ (50.8 mm) diameter piping and ranging up to flat surfaces
  • Scans through stainless steel and aluminum cladding with insulation thicknesses up to 4″ (102 mm).
  • Type of insulation (calcium silicate, mineral wool, fiberglass, etc.) has no effect on signal response. The presence of moisture within the insulation also has no effect
  • Detects surface corrosion (wall loss, pitting) on piping of any wall thickness and large area I.D. corrosion on schedule 40 piping
  • Can locate butt welds
  • Encoded data with mapping option
  • Multiple wheel sets and quick release pins on the axles allows the versatility of using only one scanner for your inspection needs
  • Water Resistant
  • Circumferential scanning technique on cladding overlaps to eliminate “reduced sensitivity/dead zones”
  • Positioning device displaying circumferential position and reference angle to assure straight scans and angular position of the next scan

Detection Capabilities

Insulation Thickness
Wall Loss
Stainless Steel up to 4″ up to 3″ up to 4″
Aluminum up to 3″ up to 2″ up to 3″
*30% Surface Depth, 1″ (25.4mm) Diameter Pit Detection

Scout Unit


  • Mapping Software
  • Extra batteries/chargers
  • 75ft.(23m) extender cable
  • Specialty calibration pipes with specified defects (a standard pit calibration pipe and a welded calibration pipe is included with the system purchase)

Report Excerpts:

Previous CUI Inspection Results

Customer Pipe Size Comments/Results
East Coast
Chemical Plant
4″ & 6″ Inspected approximately 10 piping circuits.
Detected wall loss on three (3) different pipes:
UT prove up confirmed wall thickness of 0.216″ of nominal 0.240″
Power Plant
4″ – 16″ Inspected approximately 25 piping circuits. Identified area with wall thinning, and confirmed 0.418″ remaining wall thickness of nominal 0.500″.
Ohio Valley
Power Plant
6″ Inspected one piping circuit. Detected wall loss, of 0.417″ wall remaining of nominal 0.432″
Gulf Coast
Chemical Plant
2″ – 6″ Inspected 4 piping circuits. Detected several area of wall loss on one line. Customer did not want to “prep” line for UT prove up for fear of causing a leak.

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