Modified Sliplining

Published: September 10, 2018 | Last updated: July 5, 2023

What Does Modified Sliplining Mean?

Generally, slip lining it is a method of trenchless rehabilitation that involves the insertion of a carrier pipe into the pipe being rehabilitated. Modified slip lining uses a spiral wound, panel or formed-in-place pipe to reline – and rehabilitate – aging or damaged pipe.

Trenchlesspedia Explains Modified Sliplining

Spiral wound pipe liner is a spiral of pre-grouted, layered, composite PVC. Spiral is inserted into the pipe and expand its. The graph holds the ribbed structure of the spiral tightly to damaged pipe creating a firm seal.

Panel liners (also known as "PL") are used for large pipes (greater than 48 inches in diameter) and panel-by-panel into the damaged section of existing pipe to foreign carrier pipe. The annular space between the damaged pipe and the carrier pipe is then grouted to prevent ingress of groundwater or egress of the fluid carried in the carrier pipe.

Formed-in-place pipe (FIPP), also known as cured-in-place pipe (CIPP) is lying method that uses a resin saturated polyester or fiberglass fabric tube as the relining material. The liner is inserted into the damaged pipe and expanded (often by blowing compressed air into the cube) until a resin is fully in contact with the damaged pipe. The resin is insured (in-place).

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