Opening of Bids - Sewer and Manhole Rehabilitation Project No 118-093 - Insituform Technologies USA LLC

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INNOVATIVE METHODS OF TESTING the long-term structural behavior of Cured -In -Place Pipe (CIPP) demonstrates that the Insituform product design life exceeds 50 years and that ASTM F-1216 design recommendations for physical properties are conservative for the Insituform product. The research was conducted by the Trenchiess Technology Center (TTC) at Louisiana Tech University and funded by the U.S. Army Corps of Engineers. The purpose was to provide, for the first time, an independent assessment of manufacturer's claims regarding long-term buckling behavior of their pipeline rehabilitation products. Research conducted by the Penehless Technolo fy Venter at Louisiana Tech University confirms Insituform's 50-year design life. The expected design life and long-term behavior of trenchiess pipeline rehabilitation products is important to owners and engineers in evaluating the various systems available in the marketplace, especially since none of these systems have been in actual service for the design lives claimed. This becomes even more critical considering the recent growth of the trenchless pipeline rehabilitation industry and that many products have less than five years of experience. Product tested' Cured -in -Place Pipe Insituform® Process Test: Design Life Conducted by: Trenchless Technology Center at Louisiana Tech University; funded by U.S. Army Corps of Engineers Report Date: August 1994 The research included both experimental and analytical studies related to the application of CIPP and Fold -and -Formed Pipe (FFP) technologies In partially deteriorated, gravity pipeline applications where bonding did not exist between the plastic pipe and the host pipe. Five manufacturers participated in the test program. seven different products, including six CIPP products and one FFP product, were evaluated in approximately 200 tests. Insituform products that were tested included Insituform Standard, which is a widely used polyester resin Insitupipe° material, and Insituform Enhanced, which contains an additive to the polyester resin to Increase the flexural properties of the finished Insituform product. The plastic pipes were encased in steel pipes, with hydrostatic pressure applied between the two pipes. To measure long-term performance, each test remained under constant pressures for up to 10,000 hours or until failure, whichever occurred first. The test results were plotted and extrapolated beyond the test period to estimate behavior up to 50 years. Standardized material tests (flexure, tensile and pipe stiffness tests) were also conducted to characterize the fundamental properties of the product materials.