Orifice plate meters are one of the most widely used technologies in industry for gas flow metering. This is due to their
relative simplicity, the extensive publicly available data sets that led to several orifice plate meter standards [1, 2, 3, 4] and
the fact that they are a relatively inexpensive method of gas metering. However, it is common in industry for gas meters to be
installed in applications where the flows are actually wet gas flows, i.e. flows where there is some liquid entrainment in a
predominantly gas flow. This is usually done out of economic necessity or due to the fact that the system designers were not
aware at the systems conceptual design stage that the gas flow would have entrained liquid. Therefore, with the orifice plate
meter being such a popular gas flow meter it is by default the most common wet gas flow meter.