Inliner Operates Under Pressure

In September of 2013, Lametti & Sons completed one of the first commercial projects applying the Inliner Technologies process to a pressure pipe application. The project was completed for the City of Minnetrista.

In September of 2013, Lametti & Sons completed one of the first commercial projects applying the Inliner Technologies process to a pressure pipe application. The project, completed for the City of Minnetrista, consisted of lining over 2,770 feet of 12 1/2" cement-lined, ductile iron pipes. A specially manufactured, reinforced liner was produced for the project which would ensure that the pressure requirements could be accommodated. The liner was installed in a series of water inversions terminating at those points in the line where the original bends would not allow for an inversion to pass. The project consisted of several challenges, not the least of which was a temporary conveyance system. Since the force main could not be shut down, the crew was required to install during a window produced by sequencing their efforts to pump down the wet-well during off-peak usage times. This afforded the technicians an adequate time period in which to successfully install the liner.

Additionally, the force main was owned by two different municipalities, resulting in weekly construction meetings throughout the effort to ensure both owners were aware of exactly what efforts would be completed during each week. Time was of the essence as the line ran along a street critical to traffic flow of the nearby school. The owner emphasized the need to be completed with this section prior to school resuming and Lametti & Sons was able to meet these expectations.

Upon completion of the linings, end seals were attached to the ends of each inversion and the pipe was pressure tested hydrostatically and found to be leak-free. All told, the project was completed in approximately 40 days with minimal excavation, lining 2,770 linear feet and rehabilitating the six (6) air release valve structures with new fittings.

Posted: September 25, 2013

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