Sewage upgrade Agru of Austria has supplied what it says is the country’s “largest PE 100-RC pipe”, in a lake in the provincial capital of Bregenz. Bregenz is securing its sewer system against

flooding, which involves relocating a 900m long emergency overflow from the wastewater treat- ment plant. In addition, it is adding a new flood pumping station, which will pump 4,000 litres per second when finished. Agru has supplied 280m of large-diameter pipe – with an outside diameter of 1800mm in SDR 26 – to the project. During installation, the lake section of Agru’s

Above: Drainage pipe, which was later floated into Lake Con- stance, was welded in Agru’s production hall

The project was undertaken due to frequent

breaks in the city’s existing 50-year-old force main. The new pipe will enable the force main to be repaired.

Boosting production Battenfeld-Cincinnati has supplied a new extru- sion line to Mexican pipe extruder Policonductos – allowing it to make pipes up to 1,600mm in diameter. “We are enthusiastic about the range of options

offered by this new line,” said Homero Garza, general manager at Policonductos. “We have been able to expand our product range to include large-diameter pipes and can now also produce pipe dimensions to individual customer specifica- tions without any problems.” The line includes a SolEx 120 NG extruder, as well as all upstream and downstream components such as gravimetric metering, EAC internal pipe cooling, vacuum tanks, spray cooling baths, haul-off and cutting saw. Policonductos reaches an output of up to 2 tonnes/hour on the line. It makes HDPE pipes with a colour stripe for fresh water supply, sewage disposal and mining applications, with dimensions ranging from 406 x 12.5mm to 1.651 x 97.1mm. The new line expands the range of Battenfeld-

Cincinnati’s fast dimension change (FDC) systems. Before, they could produce pipe in three size ranges, with the largest being 400-630mm. Another key feature of the line is a pipe die, which comes with “the largest adjustable melt gap ever produced”. Battenfeld-Cincinnati says this enables the production of pipes in a wide range of different diameters without conversion. For large pipes, such as those produced by Policonductos, a die change would be necessary on a conventional line. The adjustable die saves cost and time – while also enhancing safety, says Battenfeld-Cincinnati.

24 PIPE & PROFILE EXTRUSION | September 2021

drainage pipe was floated into Lake Constance and sunk the next day by professional divers to depths of 16m. Prior to this, contractor I+R welded together 22 prefabricated polyethylene (PE 100-RC) pipe rods – with a diameter of 1.8m – and attached concrete half-shells to the seams of the total 280m long pipe. These served as ballast during floating – and as pipe supports after lowering. There are several reasons why the lake portion

of the pipe was made in plastic. “PE has a much longer service life than rein-

forced concrete or fibreglass,” said Markus Ebster, head of the XXL Pipe Systems business unit at Agru. “It is also corrosion-resistant, less expensive and easier to install.” In addition, he said it is more flexible, so can withstand a swell during installation and any vibrations or settlements at the bottom of the lake later on.

Agru has also supplied PE 100-RC pipes for a district cooling project in Vienna. The pipes transport water from the River Danube to a new district cooling centre – where it is cooled. It is then transported directly to consumers via a separate network. Afterwards, warm water is then pumped back into the river. Agru supplied several hundred metres of pipes – with outside diameters of 560-710mm – as well as providing an electrofusion welding machine, a round pressing device and peeling chain. The new district cooling centre, built by Wien

Energie, will supply buildings over an area of 300,000 sq m.



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