The new iPlus Infusion UV felt cured-in-place pipe (CIPP), manufactured and installed by Insituform Technologies, an Aegion company, is now commercially available.


Insituform has successfully installed the iPlus Infusion UV felt liner, which was launched at the NASTT No-Dig Show in March 2019, in various regions throughout the United States and anticipates completing several more installations around the world by the end of 2019.


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Insituform patented UV cured-in-place pipe in the 1980s as an alternative to standard heat-cured liners. Some of the benefits of using UV felt CIPP liners include the reduction or elimination of styrene emissions, the ability to continuously monitor and regulate the cure cycle, as well as a potential reduction in the overall project footprint. In addition to these benefits, the UV felt CIPP is approximately 30 percent more cost effective when compared to the original UV glass CIPP liners. This is achieved by utilizing a purely felt based tube while still complying with long-term design requirements.


iPlus Infusion UV felt CIPP utilizes an internal glass scrim layer to control pull-in stress loads and prevent liner damage. In addition, an integral bladder system provides an extra layer of protection from groundwater infiltration into the piping systems. All materials used are designed to provide optimal translucency for complete cure. iPlus Infusion UV felt CIPP is designed to ASTM F1216 and F1743 standards and provides a more than 50-year structural solution.


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Liners can be saturated using a UV cured polyester resin and/or a styrene-free vinyl ester resin on a specially modified conveyer system or through a positive-head impregnation system. Temperature controls are not required for storage or transport of iPlus Infusion UV felt CIPP and it has a storage life of at least six months, providing great flexibility for future installation schedules.


The installation process is like the process used for standard CIPP and uses standard UV equipment. Once the tube has been pulled into the host pipe and partially inflated, the UV light train is inserted into the pipe. Once the light train is in place, the tube is fully inflated, and the tube is cured. The operator can inspect the liner before it is completely cured. Typical diameters of iPlus Infusion UV felt CIPP are between 6 and 15 in., with maximum install lengths of approximately 750 ft.


SOURCE – Aegion


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