Metering the gas flow-rate in a wet gas flow by using a Venturi meter requires a correction of the meter over-reading to account for the liquids effect. This paper lists eight correlations and analyzes their characteristics and limitations. A new correlation was proposed based on the separated flow theory and neural network

and was verified by experiment.The error of this correlation was within 5%. Finally the performance of the new correlation and traditional correlations was compared with new independent data from the Tianjin University Wet Gas Loop and NEL report. The results showed that new correlation could predict wet gas Venturi meter over reading accurately with the conditions of pressure from 0. 15 MPa to 6. 0 MPa

diameter ratio β from 0. 4 to 0. 75

gas densiometric Froude number from 0. 5 to 5. 5

the modified Lockhart-Maretinelli parameter varied from 0. 002 to 0. 3

gas to total mass flowrate ratio from 0. 5 to 0. 99.