New at PipingDesign.com: 29 October 2000

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Proof That Draining Down Condenser Water Piping Will More Than Double Its Corrosion Rate
East Coast Industries Inc.

<<It is a generally recognized fact that fully drained or partially
drained piping systems are far more susceptible to corrosion than systems containing treated water, or even untreated water. Given a moist environment in combination with the presence of abundant air and oxygen, exposed piping has been documented to corrode at a rate two to ten times that of other water filled pipe of the same type, and located within the same circulating system. Condenser water systems suffer the greatest.>>

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History of the Disc Pump
Advanced Fluid Technologies

<<The disc pump concept dates back to 1850. A pump was invented in the
US by Sargent, who took a series of 29 parallel discs spaced a few thousands of an inch apart, enclosed them with a metal band, and made a number of holes in the band to allow fluid to pass in and out (see Figure 1). It was the first example of a pump operating solely on the boundary layer/viscous drag principle.> > Received on Sun Oct 29 18:40:00 2000