Cured in Place Pipe (CIPP)

A cured-in-place pipe (CIPP) is one of most popular trenchless rehabilitation methods used to repair existing pipelines. CIPP is a jointless, seamless, pipe-within-a-pipe with the capability to rehabilitate pipes ranging in diameters from 4″–72″. As one of the most widely used rehabilitation methods CIPP has applications in sewer, drainage, and chemical pipelines.

A resin-saturated felt tube made of polyester or vinylester is inverted or pulled into a damaged pipe. It is usually done from the upstream access point (manhole or end section). It is possible to invert the liner upstream but this carries greater risk. No digging is involved in this trenchless process, making for a more environmentally friendly method than traditional “dig and replace” pipe repair methods. The liner can be inverted using water or air pressure. Hot water or steam is used to cure the resin and form a tight-fitting, jointless and corrosion-resistant replacement pipe. Service laterals are restored internally with robotically controlled cutting devices. The rehabilitated pipe is then inspected by closed-circuit television (CCTV).

For more information regarding this type of work, please contact Ryan Arold, VP of Trenchless, at (845) 336-8753