Liquid orifice plate calculations are based on the Reader-Harris Gallagher equation for the orifice coefficient found in the Third Edition of the Manual of Petroleum Measurements Standards, Chapter 14 - Natural Gas Fluids Measurements, Section 3 - Concentric Square-Edged Orifice Meters, Part 3 - Natural Gas Applications.
Oifice bore is corrected back to a room temperature of 20°C (or 68°F). The bore input or calculated is the bore measured at the orifice manufacturer's shop at room temperature. Note that when solving for orifice bore the calculations may not converge for a beta ratio greater than 0.8.
Copyrighted 2002, 2003