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Grounding rings are often used in
pipes to ground unwanted electrical signals. In flow measurement, grounding rings are
commonly installed upstream and downstream of magnetic flow meters. Grounding rings
provide an electrical grounding pathway around the flow meter to safely eliminate
accumulated voltage or induced current in the flowing conductive fluid. Additionally
grounding rings act as a protective "wear plate" to prevent erosion of the
leading edge of the flow meter liner.
Grounding rings look very similar to paddle type orifice plates and are constructed of
materials compatible with the process fluid and pipe material. The inside diameter (I.D.)
is the same or slightly smaller than the meter's inside diameter.