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Orifice Flange

An orifice flange is used with an orifice flowmeter to measure liquid or gas flow rates in a piping system. An orifice flowmeter is designed such that the flow being measured is forced through a hole, or orifice, in a plate. The hole is designed to constrict and the pressure is measured both upstream and downstream of the hole. Knowing the inlet and exit are of the orifice and the inlet and exit pressures, the flowmeter is able to determine the flow rate. The orifice flange is used in place of standard flanges to allow for the proper installation of the orifice plate or flowmeter.