Minor losses refers to the head loss (or pressure losses) occurring in typical piping systems due to steady-state flow through piping components such as fittings, valves, bends, elbows, tees, inlets, outlets, etc. The head loss caused by flow through these components can be represented with a dimensionless resistance coefficient,

and DP is the pressure loss introduced by the piping component, r is the density, and

This library file provides the values of resistance coefficients for the pipe components and other situations shown below. Click on a picture to obtain information for that component.