The history of orifice metering began in the early 1900’s. The first test data was done by the U.S. Geological Survey and in 1913 the first “Handbook of Natural Gas” was published. So as you can tell, orifice metering has been around for over 100 years and in that time much has been learned and improved on.
Fundamentals of Orifice Metering
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February 15, 2014