Insituform (netherlands) B.v.

Charles H Nance

Franklin Thomas Driver

Richard Carl Polivka

A process for lining an existing pipeline or conduit with a flexible resin impregnated cured in place liner by pulling in the liner and inflating it with a reusable endless inflation bladder is provided. The liner includes a resin absorbent material in tubular form with an impermeable membrane forming an outer layer. The absorbent material is saturated with a thermoset resin and pulled into the existing conduit. A flexible inflation bladder maintained on a inflation bladder spool is everted into the collapse liner which is then forced against the interior surfaces of the existing conduit, allow to cure and the bladder removed and rewound on the spool. When the everting and curing fluid is hot water, the hot water is removed and stored for reuse as the inflation bladder is withdrawn.

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Wildwood, MO, United States of America

Charles H Nance