Longitudinally reinforced cured in place liner and reinforced coating

Abstract

A longitudinally reinforced resin impregnated cured in place liner with at least an outer impermeable layer of a coated reinforcing scrim to limit longitudinal stretch is provided. A continuous length of resin impregnable liner is provided in lay flat condition and impregnated. The impregnated liner is then fed into a tubular former where a resin impermeable coated scrim in tubular form having greater strength in the warp direction than in the weft direction is fed into a tubular form, sealed and continuously inverted about the inner tubular member so that the inverted wrapping envelopes the tubular member. The reinforced liner may have an integral inner impermeable layer that may also be longitudinally reinforced is installed in an existing pipeline.

Dependencies are inferred from the claim text.