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Equation 5.3, ∆p f  = 8f ru 2  L  2  d  Pipe roughness  e/d  0.05  0.04  0.03  0.02  0.015  0.01  0.008  0.006  0.004  0.002  0.001  0.0006  Smooth pipes  0.0002  0.0001  0.00001  0.000005  89  7  6  5  4  3  2  89  7  6  5  4  3  2  9  8  7  6  5  4  3  2  9  8  7  10 7  10 6  10 5  10 4  Reynolds number Re =  udr  m  roughness  relative  and  number Reynolds  versus







                                                                                                4  6  5   friction
                                                                                                          Pipe
                                                                                                3
                                                    zone
                                                                                                          5.7.
                                                     Critical
                                                                                                2
                                                                                                          Figure

                                                                                                10 3
                                                                                                9
                                                                                                8
                                                                                                7
                                                                                                6  5
                                                                Laminar flow                    4  3





                                                                                                2



                                                                                                10 2
                         0.1  0.09  0.08  0.07  0.06  0.05  0.04  0.03  0.02  0.015  0.01  0.0095  0.0090  0.0085  0.0080  0.0075  0.0070  0.0065  0.0060  0.0055  0.0050  0.0045  0.0040  0.0035  0.0030  0.00275  0.0025  0.00225  0.0020  0.00175  0.0015  0.00125  0.001  0.0009  0.0008  0.0007  0.0006  0.0005


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