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The
TesTex Eagle 2000 Multichannel RFET System is based on the principles
of Remote Field Electromagnetic Technique (RFET). It is designed to
quickly and accurately inspect ferrous tubing found in Heat
Exchangers and Drum-to-Drum Boiler Generating Banks. Inspections
using RFET are conducted from the tube I.D. (inner diameter). Other
applications are Air Cooler – Fin/Fans, Tubular Air Heaters,
and some Short-Run Plant Piping.
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The
Eagle 2000 Multichannel System uses RFET probes that have 8 pick-up
sensors equally spaced around the probe circumference**. This allows
for real time, 3-D, color graphic display showing the tube circumference as if the tube has been split open
and laid flat. Because these discreet pick-up sensors are very small
(usually a few millimeters in diameter), they have higher resolution
and greater detection capabilities for smaller flaws such as pitting.
Multichannel waveform from the Eagle 2000 system
revealing baffle cutting
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The
Eagle 2000 Multichannel System detects and quantifies flaws such as
Baffle Cutting & Fret Wear, Erosion & Corrosion, Pitting,
Soot Blower Thinning, Flue Gas Erosion, and Steam Impingement.
Cracking is also detectable and detection and sizing capabilities for
cracking can be better established through modified pick-up coil
configuration and proper calibration standard manufacturing.
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Other
methods for the inspection of Carbon Steel tubing are IRIS UT, and
Magnetic Flux Leakage. The IRIS UT method requires extensive tube
cleaning for the technology to work because the Ultrasonic signal
will not easily penetrate through oxides, scale, deposits, or debris.
If the tube’s ID surface can be cleaned down to near bare metal
finish, the IRIS UT technique can be successfully applied. TesTex
does offer IRIS UT inspections as a service. The Magnetic Flux
Leakage method of inspecting Carbon Steel tubes also requires
substantial tube cleaning because the actual flux leakage probe needs
to have a good “fill-factor” or snug fit compared to the
tube’s ID. Because the Magnetic Flux Leakage probes employ
actual magnets in the probe heads, the probes will collect any type
of magnetic deposits that are remaining in the tube. While the IRIS
UT method has very good flaw quantification capabilities, the
Magnetic Flux Leakage method has shown to be less quantitative and
more qualitative.
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The
TesTex Eagle 2000 Multichannel System does not require extensive tube
cleaning because the RFET system allows for usage of probes that do
not need a tight fill-factor compared to the tube’s ID. RFET
probes do not use any permanent or electro-magnets; therefore, the
RFET probe heads do not collect any magnetic deposits or debris. The
TesTex Eagle 2000 Multichannel System is quantitative with usage of
the proper calibration standards.
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**
Some smaller diameter RFET probes may have (4) or (6) sensors as
opposed to eight.
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- Real Time 3-D Color Graphic Displays for Data Acquisition and Data Analysis/Display
- Inspects Straight Sections and Bends; U-Bends can be inspected with special probes
- 300-400 tubes average productivity of one system in a 10-12 hour shift
- Inspects through scale on the ID or OD
- Probe Fill Factor not critical to opera
- Numerous Signal Processing Algorithms available for Data Analysis
- Windows Based Software
- Small, Lightweight, Modular, PC Based Design
- 110/220V Operation
- Probe sizes from 0.320” (8.1mm) to 6” (152mm)
- Low Signal to Noise Ratio
- Probe lengths of up to 150’ without signal pre-amplification
- System Frequency Range of 5Hz to 30KHz. (lower frequencies are critical for the inspection of thicker walled Carbon Steel tubing and Air Cooler – Fin/Fans)
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