Aging wastewater pipe infrastructure is a problem and especially in older cities along the East Coast.
This past summer, the New York State Department of Transportation (NYS DOT) evaluated the Formadrain system. And the results made it clear that our no-dig method of pipe repair was as superior as it was cost-effective.
Our licensee, Towpath Pipe Restoration, provided an on-site demonstration at the DOT warehouse near Albany.
This demonstration allowed DOT engineers to understand, among other things:
- how our fiberglass dynamic diameter line could produce a seamless repair,
- what controls existed to ensure uniform results, and
- how our wet out method could produce even distribution of epoxy resin over fiberglass repair panels.
We took a 12” diameter corrugated, galvanized drain pipe, punctured one section, changed the shape of another part from circular to oval, and created a two-foot gap in the pipe. The drain pipe was then connected to a smaller diameter Sonotube for further inspection and testing. This simulation setup was one of the worst possible pipe lining scenarios. (The sonotube used was 12 inches as well. It is a bit smaller in real value, but both nominal values are 12 inches).
Rather than bring a shop-prepared liner to the repair location, the wet-out was done in the parking lot to show DOT engineers how our company installers are trained and supplied with technical field manuals that allow them to be prepared for any and all repair situations.
When the wet out – which uses resin that contains no harmful chemicals or volatile organic compounds (VOCs) – was complete, our techs wrapped the flat panel resin-impregnated fiberglass liner around a pre-wrapped Formadrain-engineered mandrel. This would ensure a seamless repair that would conform to the interior dimensions of the damaged pipe. This would allow us to insert the repair into place and inflate it to the existing pipe size. They then inserted the liner into the repair area by pulling it into place with our specially designed two-ton winch.
Steam heat and pressure was applied using the Formadrain equipment (manifold is irrelevant here and part of the whole steam unit). After 52 minutes, the steam was shut off and cold air was injected to cool the repair area in preparation for the extraction of the mandrel. This was removed once the repair had sufficiently cooled 15 minutes later.
DOT engineers examined the repaired pipe and pronounced the repair a success.
Our company has been an industry leader in trenchless technology for twenty years. Our green no-dig methods have helped cities and individual homeowners all over North America save time, money and the environment.
For quality pipe rehabilitation you can trust, think Formadrain!