Leq is the length of pipe with diameter (D) and friction factor (f) having the same energy loss as a fitting (valve, elbow,etc.) with minor loss coefficient (K).
To: LMNO Engineering home page Unit Conversions Trouble viewing or printing?
Equation (from the references listed under Discussion and References for Closed Conduit Flow):
f and K are unit-less. D and Leq have the same units. For instance: If D is in meters, then Leq is in meters. If D is in inches, then Leq is in inches. If D is in ft, then Leq is in ft.
© 1998-2013 LMNO Engineering, Research, and Software, Ltd. (All Rights Reserved)
LMNO Engineering, Research, and Software, Ltd.
7860 Angel Ridge Rd. Athens, Ohio USA (740) 592-1890
(modified January 10, 2013 - added text discussing units for f, K, D, and Leq)