7 Large dimensions – up to 1600 mm We extrude pipes in dimensions up to 1,600 mm. The pipes are manufactured from PE100 RC, which gives discharge pipes, pressure sewers and raw water pipelines, etc. a long service life. Over-sizing the pipeline from the outset gives you a future-proof, large capacity pipe system that can easily be supplemented with fittings and connections when needed. 4,600 m marine pipelines Extena and egeplast have supplied pipes for several large marine pipeline projects, such as the renovation of the water treatment plant at Grebbestad in Bohuslän county north of Gothenburg. For this extensive project, where the goal was to improve the efficiency of the municipal water treatment plant, we supplied a total of 4,600 metres of marine pipeline. Each welded and immersed segment is 500 metres long and weighs 250 tonnes, which placed very high requirements on the quality of both pipes and joints. In order to cope with the harsh demands and the tough conditions, PE pipes with a dimension of 710 mm SDR 17 were used together with polyethylene pipe fittings from egeplast. Logistics and installation went according to plan and Grebbestad now has a very efficient water treatment plant with a long and safe service life. Drinking water for future generations Another large project that we have been involved in is the construction of a new water supply in Skellefteå in northern Sweden. The project included 50 km of pipeline, for which Skellefteå Municipality and the general contractor chose to use PE100 RC pipes from Extena. The water that is transported from the water treatment plant to Skellefteå’s 45,000 inhabitants is distributed in double pipes with a diameter of 560 mm. By adding double pipelines from the start, Skellefteå Municipality has ensured that it will be able to cope with any increased future demands.
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