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Flow-X─ Function Reference
Flow-X General functions - fxAPI_Dens15C_1952
fxAPI_Dens15C_1952
Density (T, P) <--> Density (15°C, equilibrium pressure)
This function converts a density value at the observed temperature and pressure to the density at 15°C
and the equilibrium pressure (typically 0 barg) or vice versa.
The temperature conversion is according to ASTM-IP Petroleum Measurements Tables 1952 (Also
known as API-1952 tables) Table 54.
Note: this function is a combination of the API 1952 Tables and API 11.2.1M. 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
ASTM-IP Petroleum Measurement Tables, Metric Edition, Metric Units of Measurement,
1952
API MPMS 11.2.1M - Compressibility Factors for Hydrocarbons: 638 - 1074 Kilograms per
Cubic Meter Range - First Edition, August 1984
Function inputs
Remark
EU
SW tag
Range
Default
Name
Optional tag name, tag
description and tag group
Observed Density
Depending on the conversion
method this is the Density
either at the observed
temperature and observed
pressure or at 15
°
C and the
equilibrium pressure
kg/m3
0..1300
0
Observed
temperature
°C
-
100..200
15
Observed pressure
bar(g)
-1..150
0
API 11.2.1
rounding
0: Disabled
The calculation of the
compressibility factor F is
performed with full
precision
1: Enabled
API-MPMS 11.2.1 rounding
and truncating rules are
applied. The
compressibility factor F is
rounded to 3 decimal
places as specified in the
standard.
-
API1121R
ND
0
Equilibrium
pressure
The equilibrium pressure is
considered to be 0 bar(g) for
liquids which have an
equilibrium pressure less than
atmospheric pressure (in
compliance with API MPMS
12.2 par. 12.2.5.4).
bar(g)
EQUIPRES
0..150
0
Содержание flow-x
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