PE100 | MATERIALS
Fluid transfer: recent advances in PE100 pipe
High mechanical strength – and a rigorous testing regime – means that PE100 is often the material of choice for demanding pipeline projects
When a pipe system is installed, one of the main criteria for success is how long it will last. This is particularly relevant for large pipes – which are not easy to replace – and in many cases these will be made from PE100, thanks to its longevity. Agru of Austria, for instance, recently supplied PE100-RC pipe for a backup pipeline – to transport wastewater across the Fuschlsee lake in Salzburg. Here, a PE sewer pipeline has already been in
operation since 1975, so will soon reach its calcu- lated service life of 50 years. A parallel 4,200m backup sewage pressure pipeline is needed – so that it can be used in case the old line fails. The new line crosses the entire width of the lake. It has the capacity to transport 600-900 cubic metres per day of wastewater – from the municipal- ity of Fuschl am See to a treatment plant. Agru has supplied 4,248m of the PE100 pipes in OD 280mm and SDR 17 (16mm wall thickness, maximum 10bar pressure), as well as fittings and a
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CNC-controlled butt-welding machine. The black PE 100-RC pipes – with axially running, brown colour stripes for clear identification as wastewater pipe – have high resistance to point loads and stress cracks. The system ensures extra safety during decades of operation on the rocky bottom of the lake at a depth of 66m – at a temperature of 4°C all year round. In addition, the material offers good resistance to chemicals in household wastewater (such as alkalis and surfactants). Peer Wasserbau was given around two months to weld the pipeline – from 18m long pipe rods – before floating it into the pipeline route and sinking it. The Agruline pipes are joined using butt-welding machine. Since individual pipe rods are joined exclusively with the pipe material, a monolithic, continuously corrosion-resistant piping system is created, says Agru. Christian Winkler, managing director of the Reinhalteverband Fuschlsee-Thalgau, said: “The
Main image: Agru’s
PE100-RC pipe transports wastewater across a freshwater lake in Austria
April 2020 | PIPE & PROFILE EXTRUSION 39
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