This module lets you calculate the following orifice-types: *Gas Orifice*Liquid Orifice*Restriction Orifice - Gas*Restriction Orifice - Liquid For gas-calculations you have to enter specific gas gravity, temperature and pressure.

You can also give mole-fractions of N2, CO2 and H2S for sour gas calculations.The AGA-8 equation is used for calculating Z-factor (compressibility factor) for natural gases, and the Redlich-Kwong equation of state for air and nitrogen.For oil-calculations you have to enter specific oil gravity, temperature and pressure.

For water-calculations the input requirements are salinity, temperature, and pressure.