Get reference code
Appearance
Sample
ProfessionalEngineering

# Density of oil

##### Recalculation of density of oil for different temperature and pressure values. Formulas are taken from Russia's GOST R 8.610-2004. "State system for ensuring the uniformity of measurements. Density of oil. The tables for recalculation" standard
Timur2013-11-04 10:33:33
Recalculation of density of oil for different temperature and pressure values. Formulas are taken from Russia's GOST R 8.610-2004. "State system for ensuring the uniformity of measurements. Density of oil. The tables for recalculation" standard. Used formulas are listed below the calculator.

Density of oil
Target density of oil, kg/m3:
Density of oil at 15 deg C:
Density of oil at 20 deg C:
Coefficient of volumetric expansion at initial temperature:
Compression coefficient at initial temperature:
Coefficient of volumetric expansion at target temperature:
Compression coefficient at target temperature:

Density of oil at given temperature and pressure $\rho_{tP}$ is expressed via density of oil at 15 deg C and zero overpressure $\rho_{15}$

$\rho_{tP}=\rho_{15}K_tK_P$

$K_t$ - temperature correction coefficient, calculated according to the formula

$K_t=e^{-\alpha_{15}(t-15)(1+0.8\alpha_{15}(t-15))}$

$K_P$ - overpressure correction coefficient, calculated according to the formula

$K_P=\frac{1}{1-\gamma_tP10^-3}$

Density of oil at 20 deg C and zero overpressure is calculated according to the formula

$\rho_{20}=\rho_{15}e^{-\alpha_{15}(20-15)(1+0.8\alpha_{15}(20-15))}$

Coefficient of volumetric expansion at 15 deg C is calculated according to the formula

$\alpha_{15}=\frac{K_0+K_1\rho_{15}}{\rho_{15}^2}$,

where $K_0=613.97226$, $K_1=0$

Coefficient of volumetric expansion at given temperature $\alpha_{t}$ is calculated according to the formula

$\alpha_{t}=\alpha_{15}+1.6\alpha_{15}^2(t-15)$

Compression coefficient $\gamma_{t}$ is calculated according to the formula

$\gamma_t=10^{-3}e^{-1.62080+0.00021592t+\frac{0.87096*10^6}{\rho_{15}^2}+\frac{4.2092t*10^3}{\rho_{15}^2}}$

If areometer is used, its readings are corrected using temperature correction coefficient for areometer glass. Thus, measured density is calculated as

$\rho_t=\rho_{at}K$,

where $K=1-0.000025(t-t_g)$, $t_g$ = 20, if areometer is graduated at 20 deg C and 15, if areometer is graduated at 15 deg C.

View all calculators
(462 calculators in total. )