Pipe relining system seals without epoxy or curing

Pipe relining system seals without epoxy or curing
SureFIT close fit liner from Agru America

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SureFIT close fit liner from Agru America is designed for rehabilitating damaged pipelines with minimal environmental impact. Applications include sewage disposal and industrial piping, as well as natural gas and potable water supplies. The trenchless PE 100 liner can be used on concrete, steel, cast iron, stoneware or PVC pipes to seal cracks and repair leaky connections or damage caused by corrosion or root intrusion. The liner, manufactured according to international standard EN 14408-3, EN 14409-4 and EN 13566-3, can be inserted via existing manholes or small construction pits.

The factory-preformed pipe is folded into a U-shape, reducing the cross section by approximately 15 percent for easier insertion into the host pipe than traditional sliplining. The liner is coiled on reels in 100- to 1,000-meter lengths (approximately 328 to 3,280 feet) depending on pipe size. When heated, the preformed pipe conforms to the shape of the host pipe without the need for epoxy or curing.

"If you're trying to pull a plastic pipe that's approximately the same diameter as the existing pipe, it can be very difficult without it being deformed first," says Roger Rutherford, sales and technical director, Plastic Piping Systems, for Agru America. "This makes it a lot easier to pull into the existing line. PE 100 pipe has a very good memory. The deformed pipe, once it cools, will stay in that shape. It can be put on a spool and delivered to the job site."

With the host pipe cleaned of deposits and protrusions, the liner is winched through; one end is closed and steam is introduced. "The steam warms the pipe and causes it to go back to its original (round) shape," Rutherford says. "It's not cured in place."

The PE 100 pipe, which has a DR 17 wall thickness, is more durable than cured-in-place pipe (CIPP) lining or blown-in lining, he adds.

Available in SDR 26 and SDR 32 sizes for sewer pipe, the highly flexible liner can be joined using electro fusion welding. Manufactured in Austria, pipe sizes range from 142 mm (approximately 5 inches) to 390 mm (approximately 15 inches) outside diameter for SDR 26 and 340 mm (approximately 13 inches) to 390 mm for SDR 32. Potable water and natural gas SDR 17 pipe is available in 78 mm (approximately 3 inches outside diameter) to 390 mm sizes. 800/373-2478; www.agruamerica.com.


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