MATERIALS | LARGE DIAMETER PIPE
Right: Battenfeld- Cincinnati helped PPP to make 2.7m diameter pipe with a 5mm wall thickness deviation
Tecnomatic says it can overcome these chal- lenges with its range of extrusion lines. These rely on its new Eos extruder series, which has a spiral feed-bush and barrel. This configuration improves melt flow, which optimises the melting and mixing process. By allowing a more homogeneous melt at lower temperatures, they reduce thermal stresses and energy consumption, it says. “The geometries of the screws and barrels are
engineered to enable full control of the extrusion process, even for thick and large diameters,” said the company. “This means manufacturers can produce pipes with tight tolerances and consistent wall thicknesses.” The extrusion heads are also engineered to
provide uniform temperature distribution for the entire cross-section of the pipe during extrusion. This precise thermal management prevents sagging and deformation by controlling the material’s flow and cooling profile, for high dimensional accuracy and surface quality.
Below: Pipelife developed a rainwater
harvesting and reuse system for a road maintenance depot in Austria
Water storage To mitigate the effects of extreme weather events, stormwater management solutions – which can collect and transport water while enabling its reuse – are on the rise. Pipelife Austria recently developed and implemented a tailored rainwater harvesting and reuse system for a road maintenance depot in upper Austria. It allows the depot to enhance its operational sustainability while safeguarding its infrastructure against intense weather conditions. The depot had struggled to drain rainwater efficiently from large roof areas on its premises. It also wanted to harvest and reuse rainwater for vehicle cleaning and brine production – reducing water waste and operational costs. Using a site plan and data on sealed surfaces in the depot area, Pipelife engineers designed a
customised storage sewer system of high-density polyethylene (HDPE) spiral-wound profiles. The solution consists of two interconnected HDPE tanks – each providing a storage capacity of 75 cu m – with a stiffness class of SN8. Their high structural rigidity enables them to withstand heavy loads, with the areas above them remaining accessible for heavy traffic – a critical requirement for the depot. Each tank element has an internal diameter of 2.6m and a length of 15.3m. The prefabricated tanks, weighing 8,000kg each,
were transported to the site using specialised transport vehicles. A crane was then used to position the tanks into the prepared excavation pit, allowing for quick, efficient installation. Pipelife Austria’s portfolio ranges from PP
heavy-duty pipes with internal diameters of 800 or 1,000mm to HDPE tanks with diameters of up to 3,000mm. These systems can be customised to accommodate almost any storage capacity requirements and suit specific project conditions.
River crossing The US division of Agru was a winner in this year’s Plastic Pipe Institute (PPI) awards for its part in a boat harbour project in Virginia. The project required more than a mile of 42in diameter pipe to be run under the James River – nearly 20,000 feet of high-density polyethylene (HDPE) pipe – in less than 24 hours, for a new force main. It won its award from the PPI’s municipal and industrial division. Along with Performance Pipe, Agru provided the pipe in diameters of 42-54in for the new pipeline – which takes raw wastewater underneath the James River to the Nansemond Treatment Plant in Suffolk, Virginia. The HDPE pipe was chosen because it is flexible, resilient, and can be installed using horizontal directional drilling (HDD). In
14 PIPE & PROFILE EXTRUSION | Winter 2025
www.pipeandprofile.com
IMAGE: PIPELINE
IMAGE: BATTENFELD-CINCINNATI
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