Multiple resin system for rehabilitating pipe

Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,...

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156287, 156294, 264516, 405146, F16L 100, F16L 5516

Patent

active

056535554

ABSTRACT:
A method of lining a pipe conduit to provide superior corrosion resistance. A flexible lining hose, having a resin absorbent layer which has been introduced with a volume of high strength resin, is first positioned inside of the conduit. The lining hose is then expanded into contact with the inner diameter of the conduit by inverting a calibration hose. The calibration hose has an impermeable membrane and a layer of resin absorbent material that has been introduced with a volume of corrosion resistant resin. The calibration hose is inverted by use of fluid pressure inside the lining hose, the fluid pressure being exerted against the impermeable membrane of the calibration hose. The resin layers are then cured by the application of a heated fluid until the lining hose and the calibration hose form a unitary rigid self supporting liner.

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