C297 – API Natural Gas Viscosity Calculation

Description

This calculates the viscosity of a natural gas composition using the procedure outlined in the API Technical Data Book.

References

API Technical Data Book

Kelton calculation reference C297

FLOCALC calculation reference F094

Calculation

Pseudocritical Pressure

The pseudocritical pressure is calculated by:

Where
Pci = Component critical pressure
xi = Component mole fraction

Pseudocritical Temperature

The pseudocritical temperature is calculated by:

Where
Tci = Component critical temperature
xi = Component mole fraction

Viscosity

The viscosity of the gas composition is calculated by:

Where
Mw = Molecular weight
ρr = Reduced density
μlp = Low pressure viscosity

 

 

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