Specific Weight of Propane-Butane: Density and Weight of 1 m³
Propane-butane is a liquefied hydrocarbon gas (LPG) obtained during oil processing and from associated petroleum gases. To keep the mixture in a liquid state, it is stored and transported under pressure.
In our country, the use of propane-butane is constantly growing. This is largely due to its advantages over gasoline: high octane number, cleaner combustion and lower cost. That is why propane-butane is widely used in automotive gas equipment (LPG systems), as well as for heating and household needs.
When working with this material, it is important to consider its physical properties, one of which is density.
Propane-butane density table
Despite the common search query “specific weight of propane-butane”, in practice density and the mass of a certain gas volume are usually used.
| Material | Gas density (g/cm³) | Weight of 1 m³ (kg) |
|---|---|---|
| Propane-butane (gaseous state) | 0.0018–0.0022 | 1.8–2.2 |
Note. For liquefied propane-butane, density is much higher and usually amounts to 490–619 kg/m³, depending on mixture composition and temperature.
Specific Weight Calculation
γ = ρ × gwhere γ is specific weight, ρ is density and g is gravitational acceleration (9.81 m/s²).
Propane-butane density
Propane-butane density depends mainly on temperature, pressure and the propane-to-butane ratio in the mixture. For gas, it is approximately 1.8–2.2 kg/m³, and for the liquefied state it is 490–619 kg/m³.
Conclusion
For engineering calculations, it is necessary to consider whether gaseous or liquefied propane-butane is meant, because their densities differ by hundreds of times.
Frequently Asked Questions
Can the density of propane-butane be used for precise calculations?
The density and weight values for propane-butane in this article are reference values. They are suitable for preliminary estimates, but design, construction, production and other critical calculations should be checked against standards, material datasheets or measurement results.
Why can the actual weight of propane-butane differ from the table?
The actual weight of propane-butane depends on composition, moisture, temperature, porosity, fraction size, material grade and measurement conditions. Because of this, real values may differ from the average table data.
How do you calculate the mass of propane-butane from density?
For an approximate calculation, use the formula: mass = density × volume. If the density of propane-butane is given in kg/m³ and the volume is in m³, the result will be in kilograms.