NASTT’s Introduction to Trenchless Technology Short Course is modeled for industry newcomers and for those interested in a refresher course on trenchless methodologies. This 4-part training is presented in two sections:
Rehabilitation – June 26 and Aug. 8
New Installation – Oct. 10 and Dec. 4

The first webinar on June 26 will focus on these Rehabilitation topics:

CURED IN PLACE PIPE is a trenchless or low dig rehabilitation technique whereby a flexible resin-impregnated sleeve is installed into an existing pipe then cured to a hard finish assuming the shape of the host pipe. Aggressive cleaning of the host pipe is required prior to insertion. Robotic systems are utilized to reopen any connections. Structural CIPP products are available for both pressurized and non-pressurized infrastructure.

LATERAL LINING is accomplished by utilizing an inverted fabric bladder. Epoxy resins are impregnated into the tubing which is then inflated before the resin is cured. Curing can be via ambient temperatures or with steam. Lining can ensure a sound structural repair with no root intrusion or no leakage. This is an inexpensive, fast and non-intrusive technology that can resolve mayor infrastructure problems in mature urban areas.

SPRAY-ON SYSTEMS are non-structural applications. Benefits include improved hydraulics and water quality plus, prevention of future corrosion. No excavation is required at service connections and long installations lengths are possible. Piping usually needs to be clean and dry before lining.

TIGHT FIT SYSTEMS have been utilized since the early 1980’s and thousands of miles have been successfully installed worldwide. This technology generally uses a high density polyethylene liner from 2” to 48” in diameter with section lengths averaging 2 to 5,000 ft. Utilizing pits; the liner is winched into the cleaned host pipe through a mechanic reduction system. Once tension is released, the inserted liner expands to the host pipe.