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BorSafe HE3490-LS to deliver longevity to Estonian power plant pipes

December 14/2011

(Borealis) -- Durability and efficiency were the determining factors behind the choice of PE100 BorSafe HE3490-LS from Borealis, a leading provider of chemical and innovative plastics solutions, for renovation of a crucial cooling water circulation system at the worlds two biggest oil shale-fired thermal power plants.

Estonian Energy, referred to locally as Eesti Energia, owns and operates the large production facilities at Narva, close to Estonias northeast border with Russia. The Narva thermal power plants have a power generating capacity in excess of 2,300MW. Estonia Energy is the leading electrical energy producer in Estonia, one of the largest providers in the Baltic region and an exporter of electricity to the Nordic power market.

Upon discovering extensive pipe corrosion in the system as part of an ongoing improvement programme at Narva, Estonia Energy turned to independent Estonia-based specialist plastic pipe producer Krah Pipes OU to upgrade the approximately 40-year-old steel cooling water pipes. The old pipes did not have a Borealis coating and were not made of Borealis material.

Key requirements for the new network, involving two parallel pipelines running from a pumping station to the plants turbine room, were safety and the reduced maintenance of leak-free pipes with a minimum 30-year service life. Speed and flexibility of installation were particularly important to avoid significant power generating downtime and major cost penalties.

Borealis bimodal HDPE BorSafe HE3490-LS was identified as the pipe material offering the optimum balance of properties to meet the projects criteria. The high performance PE100 material, classified MRS 10 and on the positive list of the PE100+ Association, exceeds the reference standard for the production of these pipes. It has become the reference material for many industrial pipe and pipe relining projects globally.

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