Orifice Plate Meter || Orifice meter in hindi || Orifice meter kya hai || orifice meter derivation

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An orifice plate is called a calibrated orifice if it has been calibrated with an appropriate fluid flow and a traceable flow measurement device.

Plates are commonly made with sharp-edged circular orifices and installed concentric with the pipe and with pressure tappings at one of three standard pairs of distances upstream and downstream of the plate; these types are covered by ISO 5167 and other major standards. There are many other possibilities. The edges may be rounded or conical, the plate may have an orifice the same size as the pipe except for a segment at top or bottom which is obstructed, the orifice may be installed eccentric to the pipe, and the pressure tappings may be at other positions. Variations on these possibilities are covered in various standards and handbooks. Each combination gives rise to different coefficients of discharge which can be predicted so long as various conditions are met, conditions which differ from one type to another.[2]

Once the orifice plate is designed and installed, the flow rate can often be indicated with an acceptably low uncertainty simply by taking the square root of the differential pressure across the orifice's pressure tappings and applying an appropriate constant.

Orifice plates are also used to reduce pressure or restrict flow, in which case they are often called restriction plates

Pipe orifice is a device used for measuring the rate of flow of a fluid through a pipe. ... Discharge in orifice meter Let d1 = diameter at section 1 p1 = pressure at section 1 v1 = velocity at section 1 A1= area at section1 d2, p2, v2, A2 are the corresponding values at section 2

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