As you may have learned, trenchless is much better than trenched when it comes to most things, including pipe lining repair. There is no need to destroy a floor or lawn to access the trench, nor deal with the high financial and time costs to repair the pipes. There are many companies that have the expertise to help install or repair trenchless pipe linings. Regardless, if you would like the knowledge, or are an autodidact, here are the steps to install or repair the pipe lining with Cured In Place Pipe (CIPP). There are at least two ways to repair: 1) spray an epoxy lining on the defective area, or 2) reline the pipe with a CIPP.
We will elaborate on the second method below. The first method consisting of a Spray-on is very similar, but instead of applying a sturdy liner into the original pipe, only an epoxy coat is sprayed into it. This method does not last as long as CIPP. These processes can take up to a day and they do not require any removal of the broken pipe.
Step 1 – Assessment and Pipe Preparation
The whole process is done via a small opening area that is dug up.
– The pipe is disconnected and pipe inspection is made using a video camera to locate the areas of issue. This helps determine if lining is the best solution or if another repair method is better done before/instead.
– After the assessment, a high-pressure jet is used to thoroughly clean the pipe. This ensures that the lining can be installed properly without obstruction.
– Once the cleaning process is done, the video camera is inserted into the pipe again to confirm cleanliness.
Step 2 – Resin and Lining Preparation
– During the second pipe inspection, a length measurement is made and the exact length of lining material needed is noted. The liner is measured and cut to the right length. The liner is put on a gliding machine (much like the glider used at the cashiers).
– On a mobile lining rig, the epoxy resin mixture used for the lining is prepared. The resin is then poured onto the gliding machine with an “impregnator” roll that makes sure that the resin is flat and well-spread into the liner.
Step 3 – Liner Set-up
– The liner containing the resin mixture is put in a tank. This tank has a lever that spins and turns the liner into a roll (much like a toilet roll). The tank is then brought to the pipe opening area.
– The tank is attached to the original pipe, and air is pushed into the pipe to push and install the flat liner.
Step 4 – Liner Expansion
– A tube that can be inflated is placed in the pipe where the liner is now found.
– Hot water is added to the tube so that it expands and rests tightly in the pipe. Water stays in the tube until—about an hour later—the resin is cured; in other words, the material hardens.
– The tube can then be deflated and removed.
Step 5 – Final Touch and Reconnection
– The extra liner poking out is trimmed from the pipe.
– A video inspection is performed for a third and last time to ensure that the lining was installed correctly.
– The pipe line is reconnected, and the opening point is refilled with soil.