Flow-X─ Function Reference
4-91
Flow-X General functions - fxAPI_Dens20C_NGL_LPG
2.
The CTL value and the relative density at [60
F, equilibrium pressure] are
calculated according to API MPMS 11.2.4 (GPA TP-27) Table 54 from the density
at [20
C, equilibrium pressure] and the 'Observed temperature'.
3.
Depending on the value of input 'Equilibrium pressure mode', either value of
input 'Equilibrium pressure value' is used or the equilibrium pressure (vapor
pressure) is calculated according to GPA TP-15.
4.
API 11.2.2M requires the density at [15
C, equilibrium pressure]. For this
purpose the relative density at [15
C, equilibrium pressure] is calculated
according to Table 24E from the relative density at [60
F, equilibrium pressure]
and at 15
C. This relative density value is then converted to the density at [15
C,
equilibrium pressure].
5.
The compressibility factor is calculated according to API MPMS 11.2.2M from the
density at [15
C, equilibrium pressure] and the 'Observed temperature'.
6.
The CPL value is calculated from the compressibility factor, the equilibrium
pressure and the 'Observed pressure' input value.
7.
If API 11.2.4 rounding is enabled, then the CTL value is rounded at [60
F,
equilibrium pressure] is rounded to 0.00001
8.
The density at the observed conditions is calculated by multiplying the input
density by the CTL value and the CPL value.
Summary of Contents for flow-x
Page 1: ...Function Reference Certified flow calculations Flow and batch calculations Worksheet functions...
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