Orifice plate_F100

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Orifice plate_F100

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Detailed Introduction


Orifice plates are widely used for flow measurement as they provide the simplest and the most economical means of flow detection. Orifice plates are available in the concentric type that the round opening (Bore) of the orifice plate is positioned concentrically with the center of the pipe and the opening edge (Bore edge) is available either in the concentric square edge type (Sharp, square edge type) or in the quadrant edge type (Round edge type). Orifice plates are also available in the eccentric type that the opening of the orifice is shifted from the center of the pipe. They also are available in the segmental type that the opening is a circular segment and the orifice is comparable to a partially opened gate valve.


Orifice bore type Concentric square edged orifice Quadrant edged orifice
Eccentric orifice
Segmental orifice
Flow calculation standards ISO 5167-1 and 2 2003 AGA-3
ASME MFC-3M and 14M JIS Z 8762
BS 1042
Flange ratings JIS 10, 16, 20, 30, 40, and 63K
ANSI class 150, 300, 600, 900, 1,500 and 2,500 Lb
Pressure taps Flange taps Corner taps
Vena contract taps
1D and ½D (Radius) taps Pipe taps (2½D and 8D)
Plate thickness 3, 6, 9 and 12 mm
Tab handle Welded to orifice plate
Plate material Standard : 304SS and 316L SS
Non-standard : Monel, Hastelloy C, Titanium and etc.
Drain and vent hole Per ASME recommendations
Not drilled for orifice bores smaller than 25.4 mm
Markings Upstream side of tab handle stamped "Upstream" and with bore type and size, line size, tag number and flange rating
Special markings Special marking may be furnished to meet special requirement


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