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FN100_Orifice plate

Type: FN100


Service intended


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
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




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



Download:  CATALOG 

FN100_Orifice plate

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