Liquid Ethylene Density Calculator
Use an empirical correlation to approximate the density of liquid ethylene between -170 C and -80 C.
Density
566.18 kg/m³
Specific gravity
0.57
How to Use This Calculator
Select a temperature
Enter the operating temperature for saturated liquid ethylene in Celsius.
Confirm range
The correlation is tuned for cryogenic storage conditions between -170 C and -80 C.
Review density and specific gravity
Density is reported in kg/m³. Specific gravity uses water at 4 C as the reference.
Apply to tank sizing or transfer calculations
Use the estimates in mass balance or pump sizing calculations where precise data are unavailable.
Formula
rho = 568.8 - 0.708 * (T - (-103.7))
rho in kg/m³, T in degC. Correlation anchored at the normal boiling point -103.7 degC where density is about 568.8 kg/m³.
Example
At -95 degC: rho = 568.8 - 0.708 * ( -95 + 103.7 ) is about 562 kg/m³.
Full Description
Liquid ethylene exists only at cryogenic temperatures. Accurate density data are essential for tank design, mass balances, and custody transfer calculations.
The linear correlation provided offers quick estimates near the normal boiling point. For critical applications consult vendor or DIPPR data.
Frequently Asked Questions
How accurate is this estimate?
Expect deviations within a few kg/m³ relative to detailed property tables between -120 C and -90 C.
Can I use it above -80 degC?
No. Ethylene becomes gaseous. Use appropriate equations of state for supercritical or vapor regions.
Does pressure affect the result?
The correlation assumes saturation near atmospheric pressure. Elevated pressures require more detailed data.
How do I convert to lb/ft3?
Multiply the density in kg/m³ by 0.062428 to obtain lb/ft³.
Where can I get more precise values?
Consult thermodynamic databases such as DIPPR, NIST REFPROP, or supplier technical bulletins.