Duct Flow Friction Loss Modules

Calculate single phase liquid flow in a rectangular duct.

The Moody diagram is valid for rectangular ducts provided that the Reynolds number is calculated from the hydraulic diameter (equal to four times the cross section area divided by the perimeter). The Darcy friction factor can be calculated from the Moody diagram using either the Hagen-Poiseuille laminar flow equation, the original Colebrook White equation or the modified Colebrook White equation. The minor loss K factor is used to account for pipeline fittings such as bends, tees, valves etc.. Change flow coefficient units on the setup page (Av, Kv, or Cv).

Change Module :

• Liquid Pipeline Chemical Dose Rate Calculation Module
• Liquid Pipeline Fluid Density Viscosity And Specific Gravity Calculation Module
• Liquid Pipeline Fluid Mass And Volume Calculation Module
• Liquid Pipeline Fluid Velocity And Flow Rate Calculation Module
• Liquid Pipeline Local Pressure Calculation Module
• Liquid Pipeline Minor Loss Factor Calculation Module
• Liquid Pipeline Pressure Loss From The AGA Equation Calculation Module
• Liquid Pipeline Pressure Loss From The Darcy Weisbach Equation Calculation Module
• Liquid Pipeline Pressure Loss From The Moody Diagram Calculation Module
• Liquid Pipeline Unit Weight Calculation Module
• Liquid Pipeline Vent Calculation Module
• Water Open Channel Or Culvert Flow Rate From The Manning Equation Calculation Module
• Water Pipeline Pressure Loss From The Hazen Williams Equation Calculation Module
• All

Related Modules :

• Fluid Density And Volume Calculation Module
• Line Pipe Cross Section Calculation Module
• Liquid Kinematic And Dynamic Viscosity Calculation Module
• More Ducts Modules

Calculate API 520 Darcy friction factor and pressure loss factor for single phase liquid and single phase gas.

The Darcy friction factor can be caclulated from either the Moody diagram or the Von Karman rough pipe equation (API 520 Annex E).

At high Reynolds numbers the Moody diagram friction factor is fully turbulent and is dependent on the pipe roughness only. The pressure loss factor (fLe/ID) includes minor losses. Minor losses can be entered as either a K factor, an equivalent added length, or an equivalent added length over diameter ratio.

Reference : API 520 Sizing, Selection And Installation Of Pressure Relieving Devices (2014)

Change Module :

• API 520 Back Pressure Calculation Module
• API 520 Correction Factor Calculation Module
• API 520 Critical Flow Ratio Calculation Module
• API 520 Effective Nozzle Size Calculation Module
• API 520 Fluid Property Calculation Module
• API 520 Gas Pressure Relief Valve Calculation Module
• API 520 Liquid Pressure Relief Valve Calculation Module
• API 520 Pipe Diameter Schedule Calculators
• API 520 Pressure Relief Vent Calculation Module
• API 520 Steam Pressure Relief Valve Calculation Module
• API 520 Vent And Header Minor Loss factor Calculation Module
• All

Related Modules :

• Compressible Flow Calculation Module
• Fluid Density And Volume Calculation Module
• Gas Compressibility Factor Calculation Module
• IAPWS R7-97 Steam Table Calculation Module
• Line Pipe Cross Section Calculation Module
• Liquid Kinematic And Dynamic Viscosity Calculation Module
• More Pressure Relief System Modules