CIPP (Cured-in-Place Pipe Lining)

CIPP: The Shape of Things to Come
CIPP is a resin-saturated felt tube or robust sleeve composed of polyester that is inverted or pulled into aging and damaged sewer pipes. Typically, the CIPP lining tube is inserted into the damaged pipe with either air pressure or water pressure. Hot water or steam is used to cure the resin which then forms a solid, impregnable mass that lines the interior dimensions of a sewer pipe, taking the form of the pipe and providing a seamless, tight fitting and corrosion-resistant lining.

Precision Monitoring, Accuracy and Response
CIPP installation allows service laterals to be restored internally through the use of robotically controlled cutting devices (or by hand for significantly large sewer pipes), and ultimately inspected via closed-circuit television.

Stringent Guidelines and Parameters
All CIPP liners are designed in accordance with ASTM-F1216, the ASTM International Standard Practice for Rehabilitation of Existing Pipelines and Conduits by the Inversion and Curing of a Resin-Impregnated Tube. This international benchmark takes a series of existing pipe parameters into consideration in order to determine the proper thickness of the liner to ensure its ultimate required performance. CIPP pipe design parameters include:

  • depth of the sewer pipe
  • diameter of the sewer pipe
  • shape of the sewer pipe
  • ovality of the existing sewer pipe
  • existing condition of the sewer pipe (whether fully or partially deteriorated)
  • level of the groundwater table
  • modulus of the surrounding soil
  • density of the surrounding soil
  • live load conditions
  • vacuum conditions
  • other loads (such as railroad crossings)

For fully deteriorated pipe conditions, the design for the proper liner thickness must satisfy four complex equations:

  • hydraulic loads due to groundwater
  • minimum thickness for pipe ovality
  • hydraulic, soil and live loads
  • minimum thickness for fully deteriorated pipe

And Then There’s the CWW Standard
At CWW we design our CIPP liners based on our customers’ requirements and in accordance with specific site conditions. As a CWW quality standard – unless specified otherwise – all our CIPP liners are designed for fully deteriorated pipe conditions. This proactive and vigilant practice provides a dependable solution for any potential damage to a host sewer pipe. Even if a pipe begins to show signs of severe deterioration or totally disintegrates, our CIPP liners will structurally withstand defined loads, and operate under regular conditions for a minimum of 50 years.

CWW recommends structural liners for the following sewer problems:

  • structural defects
  • flow capacity
  • excessive inflow and infiltration
  • increased cost in processing unnecessary groundwater
  • reduction in expansion capacity of the sewage treatment plant

In Sum – Top-line CIPP Benefits

  • long-lasting and dependable structural rehabilitation
  • little to no site disruption or reinstatement
  • client’s business continues to move forward – business as usual – revenue uninterrupted
  • a fiscally responsible/cost-effective solution that eclipses traditional dig-and-replace methods
  • environmentally responsible sewer pipeline rehabilitation methodology

Comprehensive. Reliable. Innovative.

Headquartered in Ottawa and serving Ontario, Quebec and New Brunswick, Clean Water Works is one of the nation’s foremost sewer rehabilitation companies. We serve contractors, homeowners and governments, as well as customers across the residential, commercial, industrial and institutional markets.

Our skilled professionals rely on time- and field-proven engineering methodologies to complete every project. They earn the confidence and trust of our valued customers by demonstrating a singular commitment to:

Improving the performance, and sustaining the longevity of sewer infrastructures at significantly less cost and with minimal disruption using state-of-the art cured-in-place pipe trenchless technologies.

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