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Flow-X─ Function Reference
Flow-X General functions - fxAPI_Table24_1980
fxAPI_Table24_1980
Relative Density (60°F) --> CTL
This function calculates the volume correction factor for temperature CTL from the relative density
value at 60°F and the observed temperature.
The temperature conversion is according to API-2540, Tables 24A (Generalized Crude Oils) and 24B
(Refined Oil Products.
In 1982 API published tables 5D, 6D, 53D and 54D for lubricating oil products as part of API MPMS 11.1.
Although tables 23d and 24d are not covered in an official API standard the Flow-X series of flow
computer supports tables 23D and 24D as well by combining the calculation of tables 23A/B and 24A/B
with the K0 and K1 constants published in the other tables for lubricating oils.
Compliance
API MPMS 11.1 Volume X (API Standard 2540) - Table 24A - Generalized Crude Oils,
Correction of Volume to 60°F against Relative Density at 60/60°F - First Edition, August 1980
API MPMS 11.1 Volume X (API Standard 2540) - Table 24B - Generalized Products,
Correction of Volume to 60°F against Relative Density at 60/60°F - First Edition, August 1980
Function inputs
Remark
EU
SW tag
Range
Default
Name
Optional tag name, tag
description and tag group
Relative Density at
60 °F
Relative density at 60°F and the
equilibrium pressure
-
0..1.3
0
Observed
temperature
°F
-100..400
60
Product
1: A - Crude Oil
2: B - Auto select
Selection based on relative
density at 60 °F
3: B - Gasoline
4: B - Transition Area
5: B - Jet Fuels
6: B - Fuel Oil
7: D - Lubricating Oil
PRDTYP
-
1
API2540 rounding
0: Disabled
The calculations are
performed with full
precision and the final CTL
value is rounded as
specified by input 'CTL
decimal places'
1: Enabled for computational
value
API-2540 rounding and
truncating rules are applied
and the computational
value for CTL as specified in
the standard is used,
meaning that the CTL value
has:
4 decimal places if CTL >=1
5 decimal places if CTL < 1.
2: Enabled for table value
API-2540 rounding and
APIROUN
D
-
0
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