Then we will add two 660-foot lengths of six-inch drag hose: Hazen-Williams Equation outputs for this scenario: Choosing from 6-inch, 7-inch or 8-inch mainline hose, we select 8-inch. Naturally, a larger diameter pipe will be less restrictive. The energy efficiency of the pump is very good there or at higher flow rates. If we look at our pump performance curve for the Cornell 6NHTB-19 with a 375-horsepower engine, we see 462 feet of TDH will happen at 2,250 gallons per minute. We want to operate our hose at 200 psi working pressure. Lay-flat hose is super smooth, and will swell under pressure, often giving us better results than C-160 pipe. (Length of pipe: 2 miles x 5,280 feet = 10,560 feet) You bed with sand, so we will be sure to keep the liquid velocity above 13 feet per second to ensure the sand stays in suspension and doesn't settle out or fill the hose.
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