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Ring type joint orifice plate_F300

Type: F300




A holding ring assembly is a combination of a holder ring and an orifice plate designed for Ring type joint (RTJ) flanges of ANSI or JPI specifications. The holding ring  has  a function of holding the orifice plate and also a function as a gasket to prevent leakage of the process fluid. This metallic sealing system is applicable to a fluid of high temperature and high pressure, the pressure tapping system is normally the flange tap type.




Orifice bore type


Concentric square edged orifice Quadrant edged orifice


Flow calculation standards


ISO 5167-1 and 2 2003
ASME MFC-3M and 14M
JIS Z 8762
BS 1042


Flange ratings


ANSI class 600, 900, 1,500Lb and 2500Lb
Ring type joint (RTJ)


Pressure taps


Flange taps


Plate thickness


3, 6, 9, 12 mm and Over


Tab handle


Welded to ring


Holding ring


Riveted to plate
Types : Octagonal or oval


Drain and vent hole


Per ASME recommendations
Not drilled for orifice bores smaller than 25.4 mm




Upstream side of tab handle stamped with "Upstream" and with bore type and size, line size, tag number and flange rating


Special markings


Special marking may be furnished to meet Specific requirement




Plate : 304SS and 316L SS
Holding ring : Soft lron, 304SS and 316SS
Rivets : 304SS and 316SS
Tab Handle : 304SS and 316SS



Download:  CATALOG 

Ring type joint orifice plate F300

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