Online Calculators

Fluid Flow Calculator
This calculator is used to calculate pipe friction losses for straight piping handling water and water with varying percentages of ethylene glycol. The calculator uses an algorithm developed from the basic principles of fluid mechanics. The program is based on the Darcy-Weisbach equation, the Colebrook equation, and the Moody equation. The program is intended for use only on straight piping. The program does not include pressure losses due to elevation differences, or flow through fittings. Fittings and valves can be factored in by using their straight run of pipe equivalent.

This calculator allows the user to input the fluid type, the fluid temperature, the flow rate, the pipe size, pipe length, and pipe material. The calculator then determines the velocity, the Reynolds number, the Moody friction factor, the pipe friction factor (from the Colebrook equation), the pipe head loss, and the pipe friction loss in PSI. While this calculator is intended for use on systems handling water and water with varying percentages of ethylene glycol, later releases will include a wider range of incompressible fluids (liquid fuels) and compressible fluids (air).

Engineering Units Conversion Calculator
These programs allow users to convert the quantities for Energy, Pressure, Volume, Density, Specific Volume, Specific Heat (Entropy), Enthalpy, Viscosity (absolute), and Coefficient of Heat Transfer from their given units of measure  to a desired unit of measure.

Currency Converter
This calculator will convert currency from any amount and any country specified to an equal amount of currency for any country you select. You simply fill in the amount and type of currency you hold and indicate the type of currency you wish to change it to. Click on "Perform Currency Conversion" and the results are given.   

Pipe & Tubing
These calculators provide standard properties for pipe and tubing. By providing the pipe or tubing size, wall schedule and material the results will provide:
Section properties: inside & outside diameter, wall thickness, inside cross sectional area, transvers metal area, moment of inertia, section modulus, and radius of gyration.
Surface properties: inside & outside surface area.
Weight: for a variety of common metals.

Heat Exchangers
These calculators will provide graphic displays of TEMA shell & tube configurations as well as heat transfer data such as Heat Transfer Coefficients, Fouling Resistance Factors, Heat Exchanger Inlet/Outlet Temperature Prediction

HVAC
This calculator allows users to input a desired flow rate, a limiting velocity, air pressure, air temperature, the length of the duct, and the duct material. The program then calculates the duct cross sectional area, the circular duct diameter, rectangular duct equivalents (with aspect ratios of 1.0 through 4.0), air density, fluid viscosity, Reynold's number, relative roughness, the Moody friction factor, the Colebrook friction factor, the pressure loss, and the duct friction loss per unit of duct length.

Single Phase Pressure Drop in Piping
The pressure drop calculation presented in this calculator applies to Newtonian fluids which are incompressible and single phase in isothermal and steady-state flow situations. The friction factor is calculated rigorously from the original Colebrook equation.

Two Phase Pressure Drop in Piping
The frictional pressure drop calculation presented here applies to steady-state, isothermal two phase pipe flow of incompressible Newtonian fluids. The procedure is based on the "Baker" correlations and flow regime maps. The procedure automatically handles the complete range of industrially used steel pipe sizes and schedules.

Pipe Sizing for Single Phase Incompressible Flow
The pipe sizing procedure presented here applies to Newtonian fluids which are incompressible and single phase in isothermal and steady-state flow situations. The friction factor is calculated rigorously from the original Colebrook equation. Piping pressure drop and rating are treated elsewhere.

Pipe Rating for Single Phase Incompressible Flow
The pipe rating procedure presented here applies to Newtonian fluids which are incompressible and single phase in isothermal and steady-state flow situations. The friction factor is calculated rigorously from the original Colebrook equation. Piping pressure drop and sizing are treated elsewhere.

Heat Exchanger Inlet/Outlet Temperature Prediction
This procedure predicts the thermal behavior of a single heat exchanger or a bank of identical heat exchangers. It can handle "TEMA" shell types (E, F, G, and J) as long as there is no change in phase.

Two Phase Flow Horizontal Flow Regime Map
Flow regime maps that graphically represent the various flow regimes as determined to exist in horizontal pipe runs.

Two Phase Flow Vertical Flow Regime Map
Flow regime maps that graphically represent the various flow regimes as determined to exist in vertical pipe runs.

Two Phase Flow Regime Determination
The two phase flow regime determination procedure presented here applies to steady-state, isothermal two phase pipe flow of incompressible Newtonian fluids. The procedure is based on Baker's flow regime maps.

Optimum Dimensions of a Vessel
This procedure calculates the optimum dimensions of a cylinderical pressure vessel with a known volume with the following restrictions:

Minimum design pressure is 50 PSIG. Input values less than the minimum will be reset by the server.

Minimum valid calculated diameter is 2 ft (0.6 m). Vessels smaller than this minimum are usually fabricated from standard piping. The procedure will not reset the calculated diameter if it falls below this limit..

Maximum valid calculated length is 60 ft (20 m). The procedure will not reset the calculated length if it is above this limit.

Material of construction is carbon steel