Pipe flow calculators

Pressure drop calculator

  • Calculate pressure drop for known flow rate.
  • Calculate flow rate for known pressure drop.
  • Darcy friction coefficient calculation.
  • Friction and minor losses calculation.
  • Darcy equation based.
  • Laminar and turbulent flow.
  • Circular and rectangle pipe.
  • For incompressible flow only.
  • Calculation includes flow velocity.

Pipe diameter 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.

Orifice flow calculator

  • 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 coefficient 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.

Air flow calculator

  • Isothermal (T=const.) flow of air in a closed pipe.
  • Calculate air pressure drop for known flow rate in a pipe.
  • Calculate air flow rate for know pressure drop in a pipe.
  • Calculate flow velocities on the start and on the end of pipe.
  • Darcy friction factor calculation.
  • Pressure drop due to minor losses and friction.

Natural gas calculator

  • 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.

Control valve sizing calculator

  • 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.

Venturi tube calculator

  • 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.

Gas control valve calculator

  • 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.

Nozzle and Venturi nozzle

  • 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.

Thermal energy calculator

  • Calculate heat energy and thermal power for known flow rate.
  • Calculate flow rate for known heat energy or thermal power.
  • Convert from volumetric to mass flow rate.
  • Applicable for boilers, heat exchangers, radiators, chillers, air heaters.

Reynolds number calculator

  • 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.

Compressible gas flow calculator

  • Isothermal (T=const.) flow of any real gas in a closed pipe.
  • Calculate pressure drop for known flow rate in a pipe.
  • Calculate flow rate for know pressure drop in a pipe.
  • Calculate flow velocities on the start and on the end of pipe.
  • Darcy friction factor calculation.
  • Pressure drop due to minor losses and friction.

Prandtl probe - Pitot tube

  • Flow velocity, Mach number, flow rate, speed of sound calculation.
  • Calculate velocity from dynamic pressure.
  • Convert from volumetric to mass flow rate.
  • For liquids and ideal gases.
  • For subsonic and supersonic ideal gas flow.

LPG flow calculator

  • LPG flow rate calculation for known heat power.
  • LPG heat power calculation for known flow rate.
  • Pipe diameter calculation for liquid and gas phase.
  • LPG flow velocities calculation for liquid and gas phase.
  • For propane and butane different mixture ratios.

Resistance coefficient K calculator

  • resistance coefficient K for elbows.
  • resistance coefficient K for bends.
  • resistance coefficient K for tees.
  • resistance coefficient K for pipe entrance.
  • resistance coefficient K for pipe exit.
  • resistance coefficient K for pipe reducers.
  • resistance coefficient K for pipe enlargement.

Gas discharge calculator

  • Calculate flow rate from pressure drop of gas discharging through valve or pipe to atmosphere.
  • Applicable for two and three atomic gases
  • Calculate maximum gas flow rate or pipe diameter
  • Friction factor calculation included based on Colebrook-White formula