Pipe Flow/Friction Factor Calculations using Excel ...

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Values of ε for common pipe materials are available in many handbooks and textbooks, as well as on a variety of websites. Table 2 below shows some typical values. Table 2. Values of Pipe Roughness, ε The surface roughness values in Table 1 came from the following two sources: Perry's Chemical Engineers' Handbook, 8th Ed., Table 6-1 - S.I. units

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