online_pipeflow_diameter:  Calculation of diameter in pipe flow Online discharge in pipe flow Online head loss in pipe flow B* = g hf/L ν = f(T); D = 0.66 [(ks1.25 Q9.5 / B*4.75) + (ν Q9.4 / B*5.2) ]0.04 [SI units: Q in m3/s; D in m; T in °C; h in m] [U.S. units: Q in cfs; D in ft; T in °F; h in ft] INPUT DATA: Select:   SI units (metric) U.S. Customary units Discharge Q :         Warning: Undefined variable $dischargeunits in /var/www/html/ponce/onlinepipeflowdiameter.php on line 538      Pipe length L :         Warning: Undefined variable $pipelengthunits in /var/www/html/ponce/onlinepipeflowdiameter.php on line 546 Head loss hf :         Warning: Undefined variable $headlossunits in /var/www/html/ponce/onlinepipeflowdiameter.php on line 554      Temperature T :         Warning: Undefined variable $temperatureunits in /var/www/html/ponce/onlinepipeflowdiameter.php on line 562  Select: Absolute roughness ks :     A. Riveted steel B. Concrete C. Cast iron D. Galvanized iron E. Asphalted cast iron F. Commercial steel or wrought iron G. Drawn tubing     OUTPUT: D =  Warning: Undefined variable $diameter in /var/www/html/ponce/onlinepipeflowdiameter.php on line 607 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlinepipeflowdiameter.php on line 607 0   Warning: Undefined variable $diameterunits in /var/www/html/ponce/onlinepipeflowdiameter.php on line 607 • Pipe Flow on Wikipedia   Your request was processed at  10:49:14 pm on April 3rd, 2025   [ 250403  22:49:14 ]. Thank you for running online_pipeflow_diameter.   [190605]