Preparing The Patch - RIDGID Pipe Patch Manual

Pipe Patch
Figure 25 – Measuring Containment Liner
2. Using sharp scissors, cleanly and squarely cut the
containment liner to length.
3. Slide the containment liner onto the packer. Baby
powder can be used on the packer to more easily
slide the liner over packer.
4. Tightly apply tape to the containment liner over the
metal ends of the packer as shown in Figure 26.
Tape should start where the black rubber of the
packer meets the metal head and continue over the
rounded end (but not cover the threaded connector).
The tightness of the tape over the rounded end holds
the containment liner in place. See Figure 26. Apply
doubled over elastic bands every 12". If needed, the
liner can be folded over.
Figure 26 – Packer With Liner, Ends Taped, Doubled Over
Elastic Bands Applied Every 12"
5. Continue building out your packer as normal by in-
stalling the packer sleeve. Pulling the patch onto the
packer with containment liner will be difficult.

Preparing The Patch

Always wear safety glasses and the provided protective
gloves when handling the resin. Prepare the patch and
resin only on the supplied table covering.
See resin containers and SDS for further information on
proper handling and use.
Once the resins are combined, the patching process
is time limited and must be completed within the
resin working time. If time runs out before the packer
is inflated in place, the patch must be disposed of
and the process restarted. Be sure all materials, equip-
ment and personnel are available and properly staged to
minimize the time it takes to get the patch prepared and
in place.
16
1. Confirm that the packer is correctly prepared. Any
needed containment should be in place and the
packer sleeve installed.
2. Lay the patch next to the packer, centered along the
length. Confirm that there are equal lengths of black
rubber packer at either end of the patch – these are
the encroachment zones. Encroachment zones are
important to the proper installation of the patch. If the
patch is too close to the ends of the packer (in the
encroachment zone), the end of the patch will not be
held tightly to the pipe inside diameter and the patch
may not work. See the Specifications Table for the
minimum encroachment zone for each packer.
Encroachment Zone - The area at each end of the
packer that will not expand to the full to the pipe di-
ameter when inflated. The patch CANNOT be in this
zone. If the patch is in this zone, the patch will not be
proper and may block the pipe. The encroachment
zone is measured from the point where the black
rubber meets the metal end of the packer. This zone
is 3" long for the 2" & 3" packers and 5" long for the
3"-4" & 4"-6" packers.
If containment is being used on the packer, the end
of the encroachment zone can be found by feeling for
the transition from the hard metal end of the packer
to rubber section.
If the encroachment zones are less than specification,
then the patch should be carefully trimmed with sharp
scissors to allow at least the minimum encroachment
zone at either end of the packer.
Once patch length, position and encroachment zones
are confirmed, using a permanent marker, mark the
end locations of the patch on the packer sleeve. See
Figure 27 .
Encroachment Zone
Figure 27A – Marking Encroachment Zone/Patch Ends
On Packer Sleeve
999-995-411.10_REV A