Chapter 9 – Weights & Measures
Firmware Version 3/4.31.37
This table provides density at 60ï‚° F of light hydrocarbons at observed temperature and
density. Use this table if the following conditions exist.
ï‚· The liquid is a NGL or LPG (propane)
ï‚· Current Temperature and Density is available.
ï‚· Relative Density at 60ï‚° F is unknown
ï‚· Reference Temperature is 60ï‚° F
Test temperatures and densities can be entered on this screen that will calculate the
corrected density at the test temperature and density. The test temperature, density and
Calculated corrected density at 60ï‚° F are for informational purposes and will not be used in
calculations during operations.
Note: This table will not produce a CTL value, but this table may be used by other tables
This table provides the relative density of a petroleum product at observed temperature and
density. This table allows specifying the commodity being measured, the reference
temperature, and the units of measure for density, pressure, and temperature.
This table provides CTL factors for correcting volumes of crude oil at observed
temperatures to the volume at 15ï‚° C. Use this table if the following conditions exist.
ï‚· The liquid is crude oil
ï‚· Density at 15ï‚° C is known
ï‚· Reference Temperature is 15ï‚° C
After selecting this table, enter the Density of the liquid at 15ï‚° C. The valid range of Density
is from 610-1075 kg/m3. Test temperatures can be entered on this screen that will calculate
a CTL based on the test temperature and the Density. The test temperature and Calculated
CTL are for informational purposes and will not be used in calculations during operations.
This table provides CTL factors for correcting volumes of gasolines at observed
temperatures to the volume at 15ï‚° C. Use this table if the following conditions exist.
ï‚· The liquid is a refined product
ï‚· Density at 15ï‚° C is known
ï‚· Reference Temperature is 15ï‚° C
After selecting this table, enter the Density of the liquid at 15ï‚° C. The valid range of Density
is from 653-1075 kg/m3. Test temperatures can be entered on this screen that will calculate
a CTL based on the test temperature and the Density. The test temperature and Calculated
CTL are for informational purposes and will not be used in calculations during operations.
This table provides CTL factors for correcting volumes of petroleum liquids at observed
temperatures to the volume at 15ï‚° C. Use this table if the following conditions exist.
ï‚· The liquid is a refined product or crude oil
ï‚· Coefficient of Expansion @ 15ï‚° C is known
ï‚· Reference Temperature is 15ï‚° C
After selecting this table, enter the Coefficient of Thermal Expansion (alpha) of the liquid at
15ï‚° C. The valid range of alpha is from 0.000486-0.001674. The alpha will be entered as
486-1674, however. Test temperatures can be entered on this screen that will calculate a
CTL based on the test temperature and the alpha. The test temperature and Calculated
CTL are for informational purposes and will not be used in calculations during operations.