AWWA CIPP classifications

Sidebar From: CompositesWorld,

Posted on: 11/30/2012

The American Water Works Assn. (AWWA, Denver, Colo.) divides cured-in-place pipe (CIPP) into four classes.

Editor's Commentary

This short article is a sidebar to a feature article, titled "Cured-in-place pipe: Trenchless trends." To read the feature article, click on its title under "Editor's Picks," at top right.

The American Water Works Assn. (AWWA, Denver, Colo.) divides cured-in-place pipe (CIPP) into four classes based on three primary distinctions in terms of structural function:

Class I: Nonstructural liners; act only as corrosion barriers.

Class II and Class III: Semistructural liners; designed to cover small holes or gaps in the host pipe.

Class IV: Fully structural liners; will carry the full internal pressure without support from the host pipe.
 

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Cured-in-place pipe: Trenchless trends

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