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Award Bid - 2024 Sewer and Manhole Rehabilitation Proj No. 122-019 - Visu-Sewer, LLC
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Award Bid - 2024 Sewer and Manhole Rehabilitation Proj No. 122-019 - Visu-Sewer, LLC
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7/23/2024 1:30:27 PM
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7/23/2024 1:29:29 PM
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Board of Public Works
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Projects
Document Date
7/23/2024
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Documentation--All written readings as well as recording charts should be kept together on one <br />sheet that describes specifics of the project, the pipe, its location, and the liner used in the <br />rehabilitation. This cure summary is often required by the client and is helpful for review in the <br />installation of CIPP. <br /> <br />LINER INSTALLATION <br /> <br />Materials -- Prior to beginning the liner inversion process a lubricant such as vegetable or mineral <br />oil should be added to the column. Only a small amount of oil is necessary to lubricate the liner. <br /> <br />Water Filling & Hose Inversion -- Be sure to have a large ball valve on a smooth piece of pipe or <br />hose to add water into the column until the hydrostatic head you require is achieved. Personnel <br />standing next to the column must continuously regulate the water during the installation process. <br />Begin filling the column with water and the liner should begin feeding into the tube. It is essential to <br />maintain the required hydrostatic head continuously during the inversion of the liner. <br /> <br /> <br /> <br />Feeding the Inversion Tower <br /> <br />Un-Folding & Feeding-- As the liner is fed into the water column take care to ensure the liner is <br />not twisted at any time. The liner should also be held back with the minimum amount of water <br />head pressure in the column in order to fully inflate the liner. This will also aid pushing any water <br />in the host pipe out and ahead of the liner. As the liner approaches the halfway point of <br />installation, trapped air in this tube may balloon out in this tube. At this point slow and/or stop the <br />inversion to allow the air to evacuate the burp tube. When all of the air has evacuated from the <br />liner, seal the burp tube with a piece of duct tape. If installing a liner with an end piece, a heater <br /> <br />
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