Flow-X─ Function Reference
4-109
Flow-X General functions - fxAPI_MPMS_11_3_3_2
fxAPI_MPMS_11_3_3_2
The API MPMS 11.3.3.2 standard consists of a table with the density values (lbm/ft3) of propylene
liquid as a function of pressure and temperature. Also part of the standard is the Calculation Procedure
to obtain the table values.
Compliance
API MPMS 11.3.3.2 Propylene Compressibility Tables, 1974, Reaffirmed 1997.
Boundaries
The Calculation Procedure of API MPMS 11.3.3.2 defines the following limits on the input values:
30 to 165 °F
0 to 1600 psig
Function inputs and outputs
Function inputs
Remark
EU
Range
Default
Name
Optional tag name, tag description and tag
group
Observed
temperature
°F
0..200
60
Observed pressure
psia
0..2000
0
API rounding
0: Disabled
The calculations are performed with
full precision.
A convergence limit of 1e-10 lbm/ft3
will be applied for the iterative
calculations.
1: Enabled
The calculated density is rounded to 5
decimal places (same as table values).
A convergence limit of 5e-6 lbm/ft3 will
be applied as defined in the standard.
-
1
Function
outputs
Remark
EU
SW tag
Alarm
Fallback
Status
0: Normal
1: Input argument out of
range
2: Calculation error
3: No convergence
-
STS
FIOOR
CALCERR
NOCONV
1
Density
At the observed pressure and
temperature
lbm/ft3
DENS
0
CTPL
Volume correction factor for
temperature and pressure
(also referred to as the
compressibility factor),
equals the density at the
observed conditions of
pressure and temperature
value divided by 32.6058
lbm/scf.
The value of 32.6058 lbm/scf
is specified in the Calculation
Procedure of the standard as
the propylene standard
-
CTPL
1
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