Flow-X─ Function Reference
4-117
Flow-X General functions - fxAPI_SG60F_1952
fxAPI_SG60F_1952
Specific Gravity (T, P) <--> Specific Gravity (60°F, equilibrium pressure)
This function converts a specific gravity value at the observed temperature and pressure to the specific
gravity at 60°F and the equilibrium pressure (typically 0 psig) or vice versa.
The temperature conversion is according to ASTM-IP Petroleum Measurements Tables 1952 (Also
known as API-1952 tables) Table 24.
Note: this function is a combination of the API 1952 Tables 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
ASTM-IP Petroleum Measurement Tables, American Edition, United States Units of
Measurement, 1952
API MPMS 11.2.1 - Compressibility Factors for Hydrocarbons: 0 - 90°API Gravity Range - First
Edition, August 1984
Function inputs
Remark
EU
SW tag
Range
Default
Name
Optional tag name, tag
description and tag group
Input Specific
Gravity
Depending on the conversion
method this is the Specific
Gravity either at the observed
temperature and observed
pressure or at 60
°
F and the
equilibrium pressure
-
0..1.3
0
Observed
temperature
°F
-
100..400
60
Observed pressure
psig
-
10..2000
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.
-
API1121RN
D
0
Equilibrium
pressure
The equilibrium pressure is
considered to be 0 psig for
liquids which have an
equilibrium pressure less than
atmospheric pressure (in
compliance with API MPMS
12.2 par. 12.2.5.4).
psig
EQUIPRES
0..2000
0
Содержание flow-x
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