Pipe flow calculators

Pressure drop calculator

Calculate pipe diameter for known flow rate and velocity
Calculate flow velocity for known pipe diameter and flow rate
For liquids and ideal gases
Convert from volumetric to mass flow rate
Calculate volumetric flow rate of ideal gas at different conditions of pressure and temperature

Calculate Reynolds number
Determine if flow is laminar or turbulent
For liquids and ideal gases
Input either velocity, or volumetric, or mass flow rate and calculate Reynolds number

Pressure drop in natural gas pipeline
Applicable for natural gas lines over 1 bar
Calculate flow rate from known pressure diffference
Input either volumetric flow rate on standard conditions or mass flow rate
Calculate volumetric flow rate at upstream and downstream end of pipe line at real conditions
Calculate velocity at upstream and downstream end of pipe

Calculate flow coefficient Cg or Kg of gas control valve or gas pressure regulator
Calculate maximum capacity of control valve or pressure regulator for known upstream and downstream pressure
Calculate pressure drop that control valve is creating for known flow rate and flow coefficient Cg or Kg
Select correct gas control valve or pressure regulator from manufacturer's flow table
Input either volumetric flow rate on standard conditions or mass flow rate

Select liquid control valve size
Calculate flow coefficient Cv or Kv of liquid control valve for known flow capacity and pressure difference
Calculate maximum flow capacity of control valve for known flow coefficient Cv or Kv and pressure difference
Calculate pressure difference for know flow coefficient Cv or Kv and flow capacity
Convert from volumetric to mass flow rate
Input either diameter or flow velocity

Calculate flow rate through Venturi tube based on the created pressure drop by Venturi effect
Calculate velocities on inlet and throat of Venturi tube
Calculate Venturi effect on pressure and velocity in Venturi tube
Convert from volumetric to mass flow rate
Calculate Reynolds number on inlet and throat of Venturi tube
For liquids and ideal gases

Calculate flow rate in pipe using orifice plate based on the created pressure drop
Calculate flow velocity in front of orifice plate and in the throat
Calculate orifice diameters
Discharge and expansion factor calculation included
Convert from volumetric to mass flow rate
Calculate Reynolds number
For liquids and ideal gases
For corner taps, 1 inch taps and D and D/2 taps

Calculate flow rate through Nozzle based on the created pressure drop by Venturi effect
Calculate velocities on inlet and throat of Nozzle
Convert from volumetric to mass flow rate
Calculate Reynolds number on inlet and throat of Nozzle
For liquids and ideal gases

Resistance factor calculation for: