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Carbon steel
boiler tubes behind swage reductions are one of
the toughest areas to inspect today. A
technician (and plant operator) often relies on
fixed diameter RFT probes that are small enough
to fit through the swage. |
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The requirement
to fit through the swage precludes the use of
segmented (array) probes. Instead,
fixed-diameter probes will employ a single
central detector to interrogate the entire
circumference of the tube. The undersized
detectors often result in poor defect
resolutions. |
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The small probes
also tend to tip and wobble, creating additional
travel noise and reducing data quality even
further. |
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The Russell
collapsible Boiler Probe is an advance d Remote
Field Probe with swage entry capability that
enables NDE technicians to inspect the tubes
behind swage reductions with maximum
sensitivity. |
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The probe’s
flexible design allows it to collapse through
swage reductions and expand to nominal diameter
behind the swage. The 3 inch probe, for
example, has the ability to smoothly collapse
down to 1.55 inch diameter. |
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By staggering
the detector coils and separating them into two
groups on each side of the probe’s exciter, the
probe eliminates blind spots and provides full
360º coverage. The spring-loaded mechanism of
the probe, ensure that the detector coils are
placed near the ID of the tube for maximum
defect sensitivity. |
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For ease of use, the probe comes
with its own probe definition file which allows
the user to instantly configure the Adept Pro
analysis software for the collapsible probe.
Because the probe connects directly to the
Ferroscope 308 system, no separate hardware
setup is required. |
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The Adept Pro
screen will be automatically configured to show
the full complement of detectors. The first half
of the detector channels on the Adept Pro screen
represents the detector group on the side of the
exciter; the second half represents the group on
the other side. Small localized defects will
show up on a single detector channel, while
larger wall loss will show up on both detector
groups. The probes are available in several
sizes and can be configured with differential
coils for maximum defect sensitivity. |
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Features |
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