TACTIC FLOW-COUPLED
TANKLESS TESTERS
FOR ROUNDS AND FLATS
Model 55 series
"On-Mill" Testers for Tube Welds
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Combining the convenience of the contact
method with the accurate beam control of an immersion
test, TACTIC Model 55
Weld Scanners provide the optimum means for
ultrasonic "on-mill" inspection of
longitudinally welded pipe and tubing. They may also be
used for "off-mill" testing of the weld zones
in cut lengths if means are provided to keep the weld on
top or bottom, while the tube is fed through the tester.
Focused
transducers in patented coupling "shoes"
examine the weld line from both sides. The shoes are
adjustably mounted on a plate which rides on the tube on
rollers under air pressure to maintain good coupling.
Contoured face plates, spaced from the tube surface, are
employed to minimize water loss and to prevent splashing
and turbulence that could produce false indications.
Coupling water fills the shoes from a filtered and
recirculated supply.
Model 55 Scanners are offered in
several configurations that cover the diameter range from
1/2 to 24 inches (13-610 mm). Request Bulletin
550 for more information.
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Model 57B series "Tankless" Flow-Coupled Testes for Rotating
Rounds
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These testers employ pneumatically
raised transducer coupling shoes in one or more dual
probe carriers that contact rotating material from
underneath. Doubly pivoted carriers provide
"following" action to maintain good coupling
and transducer alignment in spite of material centerline
displacements. Their design permits precise probe spacing
to enable "interlaced" scanning to be used to
increase inspection speed. Contact with the material is
by means of TACTIC
Model 900 Recirculating Ball Transfers.
Contoured, non-contacting faceplates minimize loss and
splashing of the recirculated coupling water. Air
"blow-offs" keep couplant water off external
conveyors. Bulletin 570 presents more
details.
Typical
Specifications
Diameter Range; 2-1/2 to 7 inches (63-180
mm).
Displacement Following Range:? 1/2 inch (13 mm)
Tests:
Normal beam & 2-direction circumferential.
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Model 57L series "Tankless" Testers for
Linearly Fed Material
This series of testers for linearly translated, flat-sided or
round material utilizes a new "glanded" version of our famous
"flow-coupler" transducer shoes. These are mounted in pairs in
an air-actuated, photo sensor-controlled, "follower" to insure
good coupling and beam orientation in spite of minor changes in test material
position as it passes through the test station. The testers can be
supplied with one, two, three or more pairs of transducers, each pair in its
individual follower
The standard range of material sizes that these testers are
designed to handle is 2-1/2 to 7 inches (63-178 mm). They include a
self-contained drip-tank with a pump and filter for couplant recirculation.
Translation of material through the tester is provided by separate
handling equipment. This may be user-supplied or TACTIC-designed.
One of the primary uses of this tester is for normal beam (longitudinal
wave) detection of internal defects in billets, as shown in the photos below.
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| Close-up of transducer coupling shoes in a
follower in a Model 57L-2 Tester as a billet enters the test
station. |
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| Model 57L-2 Tester with a 5 inch (127mm) steel billet |
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©1998-2006 TAC Technical
Instrument Corp.
