Water & Wastewater Plant Piping
Both potable water and sewage/wastewaters must be treated, the former prior to human consumption, and the latter prior to discharge into the environment. Water treatment plants (WTP) and wastewater treatment plants (WWTP) are made up of sophisticated components that house physical, biological and chemical processes. The successful connection of components and the transfer of the water and wastewater from one process to the next are possible due to pipes.
Water and Wastewater Treatment – For drinking water, once the source water arrives at a WTP from either underground or surface sources, it undergoes pretreatment, followed by coagulation and flocculation to settle out as much of the dissolved impurities as possible. Multiple sedimentation tanks then enable the removal of sludge, after which the water undergoes filtration and final disinfection, before being pumped to the distribution system for human consumption.
For sewage or wastewater, upon arrival at a WWTP, preliminary treatment removes solids and sediments using bar screens and grit chambers. Then the wastewater undergoes primary sedimentation in settling tanks. Secondary treatment then begins with the biological activated sludge process, which is followed by a secondary sedimentation. In each of these steps, sludge is removed. Finally, chlorination and dechlorination makes the wastewater safe for release into lakes and rivers.
Solutions with Steel Pipe – In both WTP and WWTPs, steel pipe is used extensively by mechanical piping contractors building “in the fence.” Steel pipe, due to its ease of fabrication, can eliminate the need for additional short body fittings commonly seen on alternative pipe materials. This includes wall sleeves for penetration in structures and under-tank connections, as well as interior gallery piping configurations.
Other common uses of steel pipe include complex pump can and manifold configurations, suction discharge headers, as well as lines for primary influent-effluent, secondary effluent, mixed liquor, finished effluent and chilled water lines. Additional uses of steel pipe, if applicable, include microfiltration systems that require high pressure piping.
The quality of engineered steel pipes and specials manufactured by Northwest Pipe Company for use in water and wastewater plant piping applications is second to none.