Construction of an alternative sewage transmission system, Warsaw, Poland
Alternative sewage collector for Warsaw
In 2019 and 2020 the sewage collector with catchment area comprising the majority of Warsaw’s left bank suffered two consecutive failures, each time resulting in a massive controlled discharge of untreated waste into the Vistula and a scramble to provide urgent solution to the problem. Uponor was invited to join the effort and within 8 days delivered and helped install a temporary PE-HD pipeline on a pontoon bridge on the Vistula for which it delivered 2,200 metres of pipes DN1,000. Interestingly, the same operation was repeated a year later using the same set of pipes, after they had undergone laboratory tests which confirmed they were fully suited for repeated use.
Following the second breakdown of the original collector, a decision was made to build a backup pipeline. The twin combined collectors were laid under the Vistula riverbed using the Direct Pipe method. The first stage of the project was concluded in July 2021 when the second of the two pipelines became operational. The next stage is currently underway, which includes the construction of auxiliary sewage facilities and infrastructure that will connect the twin pipeline with the Świderska and Farysa pumping stations situated on the right and left bank of the Vistula respectively.
Construction of sewage system and high requirements of the ordering party
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European record for pressure pipe - DN1770
The general contractor, Budimex, commissioned Uponor Infra to deliver almost 1,000 metres of WehoPipe pressure pipes DN1,770. Specifically manufactured for the project in Uponor’s factory in Kleszczów, the pipes have set a new European record for the largest diameter of a PE pressure pipe. “We are very pleased to once again be involved in a project that is so important to the everyday functioning of the capital “” says Edyta Zalewska, Sales Director at Uponor Infra Poland. “Even more so because it’s a record breaking installation of a PE (PE-HD) pressure pipeline”.
In total Uponor delivered 232 metres of WehoPipe DN1,770 PE100 SDR17 and 755 metres DN1,400 PE100 SDR17, transported to construction site in 15-metre sections. Uponor also delivered several dozen segmented bends, steel backing rings and stub ends for the project. Apart from delivering elements of the pipeline Uponor service teams carried out the butt-fusion welding using welding machines DN1600 and DN2000. It’s worth mentioning that the latter is currently the only machine of its kind in Poland. Drawing on its extensive experience with water and sewage projects around the world, Uponor also provided the contractor with technical support at every step of the installation.
Municipal Water and Sewage Company in Warsaw
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Rapid action was critical when a sewage collector broke in Warsaw, Poland, causing a massive waste spill into the Vistula River. Uponor Infra’s crew worked 24 hours a day in order to stop the pollution of the river. A temporary pipeline was produced, delivered and connected in just eight days.
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A smart retention system for an anti-flooding solution
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