The remaining options will be drawn are seen in C261 or C262 and depend on the fluid used. Both sets have common inputs such as geometry of the system and differential pressure, dynamic viscosity etc, but the first requires line density, the second uses real gas relative density along with PTZ data. This option allows the user to select which set of inputs they wish to use for implementation of the AGA 3 flow rate equations. Developed from the real gas relative density.The direct substitution method should not be used for high viscosity liquids. Both methods are generally acceptable to use though the Newton-Raphson converges faster. This option is used to select the method of calculation used to gain the flow rate. It allows the user the option of inputting pressure at either the upstream or downstream tap. This option is available when solving for flow rate. This option is used to select the desired output of the calculation. If it is liquid the expansibility factor will be set to 1. This option is used to select whether the fluid is liquid or a gas. KIMS Calculation reference K232 Options Fluid ReferencesДЄGA Report No.3 вЂ“ Orifice Metering of Natural Gas and Other Related Hydrocarbon Fluids вЂ“ Concentric, Square-Edged Orifice Meters вЂ“ Part 1: General Equations and Uncertainty Guidelines (2012) The calculation can also be rearranged to solve the differential pressure across an orifice plate or the bore diameter. This calculates the flow rate measured through an orifice plate metering system.

Orifice plate calculation software