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Question: two pressure gauges measure a pressure drop of 163 psi...

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Two pressure gauges measure a pressure drop of 16.3 psi at the entrance and exit of an old buried pipeline. The original drawings have been lost. If the 6in galvanized iron pipe carries water at 68 degrees Farenheit with a flow rate of 1.64 ft^3/s, determine the length of the horizontal underground line ignoring minor losses.

Two pressure gauges measure a pressure drop of 16.3 psi (lb/in.2) at the entrance and exit of an old buried pipeline. The original drawings have been lost. If the 6-in. galvanized iron pipe carries water at 68°F with a flow rate of 1.64 cfs (ft3/s), determine the length of the horizontal underground line ignoring minor losses.
0.1 flow f 0.08aminar Critical Transition 0.07 0.05 0.04 .03 0.02 0,015 0.0 0.008 0.03 0.025 0.004 0.002 0.02 0.001 0.0008 0.0006 0.015 0.0001 0.01 0.008 0.00001 79 20103) 3 4 5679 210) 3 45679 210) 3 45679 210 3 4 5679 200 3 4 5679 105 Reynolds number N 10 Figure 3.8 Friction factors for flow in pipes: the Moody diagram Source: Prom I.F. Moody, Friction factors for pipe fnow. 7rans. A.SME, vol. 66, 1944
TABLE 3.1 Roughness Heights, e, for Certain Common Pipe Materials e (mm) Pipe Material Brass Concrete 0.0015 0.000005 Steel forms, smooth Good joints, average Rough, visible form marks 0.18 0.36 0.60 0.0015 0.0006 0.0012 0.002 0.000005 0.15 Copper Corrugated metal (CMP) Iron (common in older water lines, except ductile or DIP, which is widely used today) 45 Asphalt lined Cast Ductile; DIP-cement mortar lined Galvanized Wrought 0.12 0.26 0.12 0.15 0.045 0.0015 0.0015 0.0004 0.00085 0.0004 0.0005 0.00015 0.000005 0.000005 Polyvinyl chloride (PVC) Polyethylene, high density (HDPE) Steel Enamel coated Riveted Seamless Commercial 0.0048 0.9 9.0 0.004 0.045 0.000016 0.003-0.03 0.000013 0.00015
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