# 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