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Flow-X─ Function Reference
4-95
Flow-X General functions - fxAPI_Gravity60F_1980
fxAPI_Gravity60F_1980
°API (T, P) <--> °API (60°F, equilibrium pressure)
This function calculates the API gravity value at the observed temperature and pressure to the API
gravity value at 60°F and the equilibrium pressure (typically 0 psig) or vice versa.
The volume correction for temperature is according to API-2540, Tables 5/6A (Generalized Crude Oils)
and 5/6B (Refined Oil Products) and API MPMS 11.1 Chapter XIII Table 5D: 1984 (Lubricating Oils), while
the volume correction for pressure according to API MPMS 11.2.1.
Note: this function is a combination of API2540 and API 11.2.1. For the calculation from observed to
standard conditions an iterative calculation is required. The rounding and truncating of input and
intermediate values is implemented such that the example calculations as specified in both standards
are exactly reproduced.
Compliance
API MPMS 11.1 Volume X (API Standard 2540) - Table 5A - Generalized Crude Oils,
Correction of Observed API Gravity to API Gravity at 60°F - First Edition, August 1980
API MPMS 11.1 Volume X (API Standard 2540) - Table 5B - Generalized Products, Correction
of Observed API Gravity to API Gravity at 60°F- First Edition, August 1980
API MPMS 11.1 Volume XIII - Table 5D - Generalized Lubricating Oils, Correction of
Observed API Gravity to API Gravity at 60°F - January 1982
API MPMS 11.1 Volume X (API Standard 2540) - Table 6A - Generalized Crude Oils,
Correction of Volume to 60°F against API Gravity at 60°F - First Edition, August 1980
API MPMS 11.1 Volume X (API Standard 2540) - Table 6B - Generalized Products, Correction
of Volume to 60°F against API Gravity at 60°F - First Edition, August 1980
API MPMS 11.1 Volume XIII - Table 6D - Generalized Lubricating Oils, Correction of Volume
to 60°F against API Gravity at 60°F F - January 1982
API MPMS 11.2.1 - Compressibility Factors for Hydrocarbons: 0 - 90°API Gravity Range - First
Edition, August 1984
Function inputs and outputs
Function inputs
Remark
EU
SW tag
Range
Default
Name
Optional tag name, tag description
and tag group
Input API gravity
Depending of the conversion method
this represents the API gravity at
either the observed temperature and
pressure or at 60
°
F and the
equilibrium pressure
°API
-20..120
0
Observed
temperature
Temperature at which the API gravity
is observed
°F
-50..400
60
Observed
pressure
Pressure at which the API gravity is
observed
psig
-10..2000
0
Product
1: A - Crude Oil
2: B - Auto select
Selection based on °API at 60 °F
3: B - Gasoline
4: B - Transition Area
5: B - Jet Fuels
6: B - Fuel Oil
7: D - Lubricating Oil
PRDTYP
-
1
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