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Flow-X─ Function Reference
Flow-X General functions - fxAPI_Dens15C_1980
'Conversion method' = 2
Density at the observed
temperature and pressure
CTL
Volume correction factor for
temperature.
Value will be rounded according
to input 'API2540 rounding''
-
CTL
1
CPL
Volume correction factor for
pressure
Value will be rounded according
to input 'API 11.2.1M rounding''
-
CPL
1
CTPL
Combined volume correction
factor
CTPL = CTL * CPL
-
CTPL
1
K0
Actual value of constant K0 used
for CTL calculation
-
K0
0
K1
Actual value of constant K1 used
for CTL calculation
-
K1
0
K2
Actual value of constant K2 used
for CTL calculation
-
K2
0
Alpha
Thermal expansion factor
1/°C
ALPHA
0
F
Compressibility factor
-
F
0
Product
When input 'Product' is 'B - Auto
select', then the output is set to
the actual selected product of
tables 53B/54B (enumerative
value as defined for input
'Product'), else the output is set
equal to input 'Product'.
-
PRDCUR
0
CTL calc out
of range
With respect to the standard
used for the calculation of CTL
the combination of input values
is:
0: In Range
1: Out of Range
CTLOOR
0
CPL calc out
of range
With respect to the standard
used for the calculation of CPL
the combination of input values
is:
0: In Range
1: Out of Range
CPLOOR
0
Calculations
The calculations depend on the conversion method.
Conversion method 1: from observed to standard conditions.
The function performs the following iterative algorithm to calculate the density at reference conditions:
1.
First the inputs are rounded in accordance with the API2540 standard, provided
that API2540 rounding is enabled.
2.
The hydrometer correction on the input density is applied, provided that this
correction is enabled
3.
At the start of the iteration the density at [15
C, equilibrium pressure] is set
equal to the observed density and the initial CPL value is set to 1.
4.
When the type of product is set to ‘B – Auto select’ (automatic selection of the
refined product range) the K0, K1 and K2 factors are determined based on the
density at [15
C, equilibrium pressure]. The Transition area is only taken in
consideration in the 2
nd
iteration loop, as specified in the standard.
Summary of Contents for flow-x
Page 1: ...Function Reference Certified flow calculations Flow and batch calculations Worksheet functions...
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