Definitions for "Orifice Plate"
An orifice plate or flange placed in a pipe that consists of a slot or a calibrated circular hole smaller than the pipe diameter. The difference in pressure between a point in the pipe upstream and a point at the orifice may be used to determine the flow in the pipe.
A plate of noncorrosive material which can be fastened between flanges or in a special fitting perpendicular to the axis of flow and having a concentric circular hole. The primary use is for the measurement of gas flow.
Plate with a central circular orifice which is clamped in a pipe or duct. Dependent on the type of plate, pressure tapping are provided as an integral part of the plate or on each side of it in the duct. The rate flow of fluid in the pipe or duct may be derived from measurement of the pressure difference across the plate.