Stormwater pipelines, especially culverts, present unique site conditions and constraints which require custom solutions.
Stormwater culverts, most commonly consisting of corrugated metal pipe, are highly susceptible to corrosion below the flow line from harsh weather elements. Our crews inspect and address any rough surfaces inside the pipe where it has been compromised to ensure that the liner is not damaged during installation. Drainage pipes are also subject to multiple types of debris ranging from grass, sticks and branches to rocks and roadside trash which must be cleaned prior to beginning work.
With direct inversion, the resin-saturated tube is inverted into the host pipe, using hot water or air to create static pressure and hold it tightly against the host pipe. With the pulled-in-place installation method, a resin-impregnated tube is attached to a cable and carefully pulled through the pipe. A calibration tube is then inverted into the pipe, again using hot water or air to hold it tightly against the host pipe. With both direct inversion and pulled-in-place, hot water or steam can be used to activate the resin-catalyst mixture and cure the pipe.
Stormwater culverts are often located under busy roads and highways, frequently adjacent to farms or land with sensitive environmental considerations. Many of these sites have access and water availability issues, which may preclude the use of one installation method over another. Inliner® installers will develop a custom solution based on each project's individual site constraints. These solutions may include the Inliner STX UV-Cured lining system which eliminates the need for the supply and discharge of water or steam for the curing process.
All Inliner® installations are designed to minimize disruptions to the public and surrounding environment. Roadside stormwater culvert projects are no different. Inliner® installers keep lane closures to a minimum, and give extra attention to safety measures that may involve traffic control. Equipment is carefully staged to avoid environmental constraints. Excavation is not typically required, unless the project has very limiting site conditions. Very rarely, minor excavation is required to place the inversion equipment.