Transcription of Wastewater Technology Fact Sheet: Sewers, Force Main
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Wastewater Technology Fact Sheet: Sewers, Force Main
United StatesEnvironmental ProtectionAgencyOffice of WaterWashington, 832-F-00-071 September 2000 WastewaterTechnology Fact SheetSewers, Force MainDESCRIPTIONF orce mains are pipelines that convey wastewaterunder pressure from the discharge side of a pump orpneumatic ejector to a discharge point. Pumps orcompressors located in a lift station provide theenergy for Wastewater conveyance in Force key elements of Force mains surge control main cleaning mains are constructed from various materialsand come in a wide range of diameters. Wastewaterquality governs the selection of the most suitablepipe material. Operating pressure and corrosionresistance also impact the choice. Pipeline size andwall thickness are determined by Wastewater flow,operating pressure, and trench conditions. Common ModificationsForce mains may be aerated or the wastewaterchlorinated at the pump station to prevent odors andexcessive corrosion.
carrying applications. Polyethylene-lined ductile iron pipe and fittings known as “poly-bond-lined” pipe is widely used for force mains conveying highly corrosive industrial or municipal wastewater. The types of thermoplastic pipe materials used for force main service are PVC, acrylonitrile-butadiene-styrene (ABS), and polyethylene (PE).
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