Contents
Frictional Losses, Flow Measurement and Minor Losses (Resistance Coefficients),
Frictional Losses
Flow Measurement
Minor Losses
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, K, defined as:
and DP is the pressure loss introduced by the piping component, r is the density, and g is gravitational acceleration.
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.
Duct Expansions
Header Expansions
Duct Contractions
Header Contractions
Inlets
Exits
Bends and Elbows
Supply and Extract Branches
Supply Duct - Branch
Supply Duct - Main
Supply Duct - Tee
Extract Duct - Branch
Extract Duct - Main
Extract Duct - Tee
Valves
Dampers
Tees
