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| If you have not seen it
before, the T-Drill process works like this... |
 1.
The T-DRILL Power legs center on the main pipe. Pilot hole is drilled.
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 2.
On the Inside of the main pipe, from the T-DRILL head special hardened
steel formation pins are extended. These cause a back flow of rigid
metal at the root radius of the joint. The result is a 5.5% average
thickening at the root radius. |
 3.
As the T-DRILL head is extracted by power feed, the formation pins
extrude an outlet around the pilot hole. Power legs absorb all rotational
torque. |
 4.
Tube End Notcher cuts a coupon and double dimples branch tube to assure
free flow and limit depth of insertion into main line providing an
inspection aid. |
 5.
The branch tube is inserted into the outlet and brazed to provide
a solid, free-flow joint. Double dimples are in line with the flow
of the tube. |
 6.
The branch outlets are as strong as the tube. One lead-free brazed
joint replaces three soldered joints needed for a tee fitting. |
| The end result is one brazed joint. No need for
purchasing, material handling, cutting, cleaning, fluxing or soldering
of the three joints on a wrot fitting. |
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