One of the rehabilitation processes that we are  extremely excited about is the "Thermo-formed" PVC Alloy pipe liner.
Our thermoformed pipe liner rehabilitation process uses the most advanced installation technology in the world. This process can rehabilitate storm culverts, sanitary and drainage piping from 3" to 30" in just a few hours, with minimum disruption to roads, landscaping and the environment. This extremely tough material has sufficient material stiffness to provide full, independent structural integrity along with a high degree of dimensional stability!
Like most of our systems, it all starts by us using a closed circuit TV system. We survey the pipe interior to determine the suitability and condition of the host pipe. At this time we also take measurements to determine the amount of material that will be required for the rehabilitation. This is followed by cleaning of the line, if needed, with a high pressure water hose that removes all accumulated build up or silt.
We then select the right diameter liner, made of PVC with polymer additives coating, and cut to the exact measurement determined from the video survey. The liner is heated with steam to make it pliable and folded to reduce its cross-sectional area in order to pull it through the pipe being rehabilitated.
Once in place, the pipeliner is heated sufficiently to allow the material to relax and reset the PVC Alloy’s "memory" to the new size and shape of the rehabilitated line. The pipeliner’s tight fit against the irregular shape of the host pipe mechanically locks the liner in place throughout its service life and thereby controls the leakage of ground water between the host pipe and the pipeliner. After the pipeliner has properly cooled, pressure is relieved and the ends are trimmed. At this point any lateral service lines are reopened using remote controlled devices, a new TV survey is done of the finished process and the rehabilitated line is placed back into service.
The end result is a very smooth, fast flowing pipe, with a 50 + year service expectancy. Installations of approximately 24 million feet have proven that this restoration method is fast, cost effective, and very durable.
- We do closed circuit television survey
- PVC Alloy liner cut to the right size
- Durable liner is pulled into the existing pipeline
- The liner is heated and inflated to "thermo-form" to host pipe
- Branch fittings are reinstated with robotic cutters
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