This app is a tool very useful for complex calculations of the gas compressibility factor Z for natural gases used in the Gas Law: PV = nRTZ. Formulas by Hall and Yarborough (1973) correlation to estimate z-factor of natural gas.

Standing and Katz’s Chart to Z-Factor vs Reduced Pressure and Reduced Temperature was plotted by app using formulas by Hall and Yarborough (1973).

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Please verify the tools provided by this application by yourself before you use them. Ensure you understand the impact of using these tools.
Any use you choose to make of these tools & materials is undertaken by you entirely at you own risk.