1 Scope
This document refers to temperature volume correction factors, which allow users to
convert volumes, measured at ambient conditions, to those at reference conditions
for transactional purposes. This document also refers to compressibility factors required
to correct hydrocarbon volumes measured under pressure to the corresponding volumes
at the equilibrium pressure for the measured temperature.
Table 1 shows the defining limits and their associated units of correction factors referenced
in this document for crude oil, refined products and lubricating oils. These values
are shown in bold italics. Also shown in the table are the limits converted to their equivalent units (and,
in the case of the densities, other base temperatures). Table 2 shows defining limits of correction factors for light hydrocarbons (natural gas liquids
and liquefied petroleum gases).
Table 1
—
Defining limits of correction factors for crude oil, refined products and lubricating
oils
| Crude oil | Refined products | Lubricating oils | |
|---|---|---|---|
| Density, kg/m3 @ 60 °F | 610,6 to 1 163,5 | 800,9 to 1 163,5 | |
| Relative density @ 60 °F | 0,611 2 to 1,164 64 | 0,801 68 to 1,164 6 | |
| API gravity @ 60 °F | 100 to –10 | 45 to –10 | |
| Density, kg/m3 @ 15 °C | 611,16 to 1 163,79 | 611,16 to 1 163,86 | 801,25 to 1 163,85 |
| Density, kg/m3 @ 20 °C | 606,12 to 1 161,15 | 606,12 to 1 160,62 | 798,11 to 1 160,71 |
| Temperature, °C | –50,00 to 150 | ||
| Temperature, °F | –58,0 to 302 | ||
| Pressure, psig | 0 to 1 500 | ||
| Pressure, kPa (gauge) | 0 to 1,034 × 104 | ||
| Pressure, bar (gauge) | 0 to 103,4 | ||
|
60 °F thermal expansion
factor (α60), per °F |
230,3 × 10 − 6 to 930,0 × 10−6 | ||
| α60, Per °C | 414,0 × 10−6 to 1 674,0 × 10−6 | ||
Table 2
—
Defining limits of correction factors for light hydrocarbons (natural gas liquids
and liquefied petroleum gases)
|
Density, kg/m3 @ 60 °F
Density, kg/m3 @ 15 °C
Density, kg/m3 @ 20 °C
|
350,0 to 688,0
351,7 to 687,8
331,7 to 683,6
|
|---|---|
|
Temperature °C
Temperature °F
|
−46,0 to 93,0
−50,8 to 199,4
|
| Pressure |
Saturation conditions (bubble point or saturation vapour
pressure) (see Note 2 to 4.1) |
This document also specifies standard reference conditions of pressure and temperature
for measurements carried out on crude petroleum and its products, including liquefied
petroleum gases (see Annex B).
This document excludes specifying standard reference conditions for natural gas which
are given in ISO 13443[15].