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CONTENTS PAGE 13


5 Industry news Aliaxis takes full stake in Ashirvad; VinyLoop Ferrara closes as R-PVC demand slumps; Italy boosts machinery imports; PPI sets up PP pressure pipe group; NPE visitor numbers rise


13 Optimising weathering for dark-coloured PVC New formulations of stabilisers and pigments help protect dark- coloured PVC products against the weather, writes Jörg Fröhlich


19 Safe mode: designing RCP out of PE pipe Polyethylene has become the material of choice for gas distribution, thanks in part to a deep understanding of its RCP properties


25 Optimised output: extruder technology Recent innovative projects include lines to make multi-layer PP pipe and nylon-reinforced tubing – and another that uses electromagnetic induction to heat the cylinder


31 Boosting energy efficiency in pipe extrusion Identifying exactly where energy is used – and introducing measures to reduce consumption – can help extruders raise efficiency, writes Massimiliano Fenili


37 Economy of scale: large diameter pipe A combination of toughness and light weight makes large diameter plastic pipes easier to install and longer lasting than equivalents made from traditional materials


41 Made in Italy: Plast 2018 review Italy is a hotbed of development in extrusion equipment, so it was no surprise to see a raft of innovations at the recent Plast exhibition. Peter Mapleston reports


50 Extruder of the month: Soleno 52 Dates for your diary


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COMING NEXT ISSUE � Medical tubing � Window profiles � Downstream equipment � Trenchless pipe installation


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July/August 2018 | PIPE & PROFILE EXTRUSION 3 PAGE 25


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