Pressure drop and flow rate calculators

Helper calculators

- Calculate pressure drop for known flow rate,
- Calculate flow rate for known pressure drop,
- Darcy friction coefficient calculation,
- Minor losses calculation,
- Laminar and turbulent flow,
- Flow velocity calculation.

- Incompressible (ρ=const.) flow of liquids,
- Darcy equation based,
- Circular and rectangle closed pipe,
- Applicable for low pressure drop gas flow also.

- Compressible and isothermal (ρ≠const , T=const.) flow of air in a closed round pipe.

- Applicable for natural gas lines over 1 bar, longer than 1 m,
- Renouard equation based.

- Compressible isothermal flow
- Applicable for any perfect gas in long closed round pipe.

- Short distance pipe line and outflow computation of any perfect gas.

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

- Resistance coefficient K for elbows, bends, tees, pipe entrance, pipe exit, reducers, enlargement.

- Determine if the flow is laminar or turbulent,
- For liquids and perfect gases,
- Input either velocity, or volumetric, or mass flow rate and calculate Reynolds number.

Flow rate computation in pressure differential devices

Control valve calculators

- Calculate flow rate in pipe based on the created pressure drop,
- Reynolds number calculation,
- For liquids and perfect gases,
- Flow velocity calculation,
- Convert between volume and mass flow rate.

- Calculate orifice diameters,
- Discharge and expansion coefficient computation,
- For corner taps, 1 inch taps and D and D/2 taps,
- Orifice graphic presented.

- Venturi effect calculation,
- Venturi graphic presented.

- Venturi effect in nozzle calculation.

Calculate flow coefficient Cv or Kv of liquid control valve for known flow capacity and pressure difference, maximum flow capacity of control valve for known flow coefficient Cv or Kv and pressure difference or pressure difference for know flow coefficient Cv or Kv and flow capacity and select liquid control valve size.

Calculate flow coefficient Cg or Kg, maximum capacity of control valve or pressure regulator for known upstream and downstream pressure or pressure drop that control valve is creating for known flow rate and flow coefficient Cg or Kg and select correct gas control valve or pressure regulator from manufacturer's flow table.

- 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 perfect gases,
- For subsonic and supersonic perfect gas flow.

- Calculate heat energy and thermal power for known flow rate,
- Calculate flow rate for known heat energy or thermal power,
- Applicable for boilers, heat exchangers, radiators, chillers, air heaters.

- 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.

- Conversion between API degrees, Baume degrees and specific gravity,
- Applicable for all liquids, but most common application is for oil,
- Calculate also liquid density ρ and specific volume v.