Trenchless pipe installation | process feature
Going down the line: trenchless installation
Speakers at the recent Pipes in Infrastructure high- lighted the importance of trenchless technology – and some of the ways in which it can be made to have extended lifetimes and easier installation. Ralf Glanert, product manager for infrastructure pipe
at Wavin Germany, said that several modifi cations to its Compact Pipe products offered higher resistance and longer lifetimes, thanks to new materials developments. Compact Pipe is one of many ‘close fi t’ products that
are fed inside existing pipelines – which may be corroded or damaged in other ways – to deliver gas, water and waste water. Installation lengths of up to 600m are possible, he said. “Approximately 40% cost savings are confi rmed in
comparison with an open trench installation,” he said. The company has recently introduced single wall PE pipes in several new grades, including PE80 RT (raised temperature), PE100 and PE100 RC (resistance to crack). He said that a standard PE80 or PE100 close-fi t pipe
has a lifetime of around 100 years at a constant temperature of 20˚C, but that this reduces rapidly at higher temperatures: at 45˚C, lifetime would be about 50 years, and at 70˚C it would reduce further – to around two years.
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The latest highlights in trenchless technology include longer lasting materials and methods of easier installation. Lou Reade reports
Tests showed that Wavin’s new Compact Pipe PE-RT
for sewer pipes has a lifetime of 50 years, even at constant temperatures of 70˚C, he said. And, at the IFAT exhibition this year, the company
introduced its PE100 RC grade, for use in water and gas applications. It covers additional outside damages and point loads, and has a lifetime of 100 years, said Glanert. It is DIN-certifi ed, under the PAS 1075 RC requirements. Testing laboratory Hessel Ingenieurtechnik said that
the folding and reforming process had no negative infl uence on the stress crack resistance of the pipes – which were made of HDPE XSC 50 material from Total Petrochemicals.
This type of pipe has been used in a number of projects, including one in Pietermaritzburg in South
October 2014 | PIPE & PROFILE EXTRUSION 33
Muna Noor has installed a line from Tecno- matic to make multi-layer PE pipe
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