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Flow-X─ Function Reference
Flow-X General functions - fxAPI_Gravity60F_1952
fxAPI_Gravity60F_1952
°API (T, P) <--> °API (60°F, equilibrium pressure)
This function calculates the API gravity value at the observed temperature and pressure to the API
gravity value at 60°F and the equilibrium pressure (typically 0 psig) or vice versa.
The volume correction for temperature is according to 1952 API Table 5 and 6, while the volume
correction for pressure is according to API MPMS 11.2.1.
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 and outputs
Function inputs
Remark
EU
SW tag
Range
Default
Name
Optional tag name, tag
description and tag group
Input API gravity
Depending of the conversion
method this represents the API
gravity at either the observed
temperature and pressure or at
60
°
F and the equilibrium
pressure
°API
-20..120
0
Observed
temperature
Temperature at which the API
gravity is observed
°F
-100..400
60
Observed pressure
Pressure at which the API gravity
is observed
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.
-
API1121
RND
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
EQUIPRE
S
0..2000
0
Conversion
1: From observed to standard
CONVER
1
Содержание flow-x
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