Cured-in-place pipe (CIPP) is a trenchless technique used to rehabilitate existing underground pipes without excavation. It involves inserting a resin-impregnated tube into the host pipe and using contained heat or ultraviolet light to cure it into a new rigid pipe within the existing pipe.
Containment bags or inflation bags are used to ensure proper placement and to contain the resin during curing. Once in place, the resin is cured using hot water or steam (for thermosetting resins) or ultraviolet light (for ultraviolet curable resins). Curing forms a new rigid pipe within the host pipe that takes its shape and contours. Any voids or gaps between the pipe wall and the Cured-in-place pipe (CIPP) are filled during curing.
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