Technical Details

Millennium Project Number: M-2002-010

Project Title: Reduced Customer Outage for CIP liners

Project Start Date: 2002

Projected End Date: NA

Technical Details:

Cured in Place liners are used by LDC's to seal leaks in aging steel and cast iron piping. However, installation of the liners can involve an extended outage for those customers located along the affected distribution main. For this reason, the use of liners is mostly limited to those pipe sections with little or no service taps. This project will investigate methods to accelerate the cure time for the liner and also to expedite performance of the air test so that associated customer outage times for lining projects are reduced.

The project investigated steam curing, hot water curing, and also briefly looked into UV curing. The conclusions were that steam curing offered the most realistic prospects for accelerating the liner curing. Curing liners with steam will be performed later this year by PPM, the CIP liner installer.

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