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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. |
| 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. |
| 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. |
| 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. |
| 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 |
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Inspects Straight Sections
and Bends; U-Bends can be inspected
with special probes |
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300-400 tubes average
productivity of one system in a 10-12
hour shift |
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Inspects through scale
on the ID or OD |
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Probe Fill Factor not
critical to opera |
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Numerous Signal Processing
Algorithms available for Data Analysis |
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Windows Based Software |
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Small, Lightweight,
Modular, PC Based Design |
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110/220V Operation |
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Probe sizes from 0.320”
(8.1mm) to 6” (152mm) |
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Low Signal to Noise Ratio |
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Probe lengths of up to 150’
without signal pre-amplification |
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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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