LPG Density, CV and Piping Dia Calculator

This helps you to calculate the density, gross and net calorific values and piping diameter for LPG.

LPG Composition

Ideally we can take default values for Indian LPG. You can change the % composition if you wish to.

Propane (C3H8)(Required)

Please enter a number from 0 to 100.

Propylene (C3H6)(Required)

Please enter a number from 0 to 100.

n-Butane (C4H10)(Required)

Please enter a number from 0 to 100.

Iso-butane (C4H10)(Required)

Please enter a number from 0 to 100.

Butylene (C5H8)(Required)

Please enter a number from 0 to 100.

Pentane (C5H12)(Required)

Please enter a number from 0 to 100.

Pentene (C5H10)(Required)

Please enter a number from 0 to 100.

Ethane (C2H6)(Required)

Please enter a number from 0 to 100.

Ethylene (C2H4)(Required)

Please enter a number from 0 to 100.

Total Percentage

RH, Temperature and Pressure

Please Check!
Total composition can not be more or less than 100%.

Relative humidity of Air(Required)

Please enter a number from 0 to 100.

Temperature (in °C)(Required)

Gauge Pressure (in bar)(Required)

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Latent Heat Requirement Calculation

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Moles of Water

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Mass of Water

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Moles of O²

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Mass of O²

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Density at of Air at Sea Level

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Air needed for combustion

Assuming air is composed of approximately 21% oxygen by volume

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Saturation point of Air

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Absolute humidity

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Mass of Water contributed by atmospheric moisture

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Total mass of Water

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Latent Heat Requirement

Net Calorific Value based on the composition

GCV based on the composition

Energy loss in process

Assumptions: 1. Density of Air at sea-level conditions, using standard atmospheric pressure. 2. Air is composed of approximately 21% oxygen by volume.

NCV for the composition

Please Note!
You have not entered the Relative Humidity of Air, So the Net Calorific Value calculation may not be accurate

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Z Factor Calculation

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Propane Z Factor

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Propane Molar Volume (L/mol)

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Propane Density (kg/m³)

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Propylene Z Factor

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Propylene Molar Volume (L/mol)

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Propylene Density (kg/m³)

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n-Butane Z Factor

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n-Butane Molar Volume (L/mol)

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n-Butane Density (kg/m³)

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Iso-butane Z Factor

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Iso-butane Molar Volume (L/mol)

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Iso-butane Density (kg/m³)

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Butylene Z Factor

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Butylene Molar Volume (L/mol)

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Butylene Density (kg/m³)

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Pentane Z Factor

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Pentane Molar Volume (L/mol)

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Pentane Density (kg/m³)

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Pentene Z Factor

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Pentene Molar Volume (L/mol)

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Pentene Density (kg/m³)

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Ethane Z Factor

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Ethane Molar Volume (L/mol)

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Ethane Density (kg/m³)

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Ethylene Z Factor

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Ethylene Molar Volume (L/mol)

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Ethylene Density (kg/m³)

Density

Please Check!
Temperature and Gauge Pressure is required to calculate the Density.

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Absolute Pressure

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Temperature in Kelvin

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R Gas Constant

Z Factor

The weighted average of the Z Factor is calculated using the Peng-Robinson Equation, based on the percentage composition.

Molecular Weight

Density

Piping Size based on Flow and Velocity

Please Check!
Temperature and Gauge Pressure is required to calculate the Piping size

LPG Flow in KG per hour(Required)

in AM³

in SM³ (SCMH)

at 15 °C and 1 ATM

in NM³

at 0 °C and 1 ATM

NCV for the Total LPG Flow

Please Note!
You have not entered the Relative Humidity of Air, so this NCV calculation may not be accurate

Velocity (in meters per second)(Required)

Ideal is 10 to 15 m/s

Please Check!
Velocity is required to calculate the Piping size

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Calculated AM3/hr

Required Pipe Diameter

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Name

This field is for validation purposes and should be left unchanged.

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