◆ Orifice flange assembly ◆
● Model : F500 series
● Description :
Orifice flange assembly is used in conjunction with orifice plate for flow measurement of smaller or medium size pipes at lower or medium pressure ranges. The flange connection is a RF type and the differential pressure tapping system is the flange taps.
● Flange mounting type :
- Welding neck
- Slip-on
- Socket-Weld
- Ring-joint welding neck
● Nominal dimeters :
- 25 ~ 600 mm
- 1" ~ 24"
● Flange ratings :
- JIS 10, 20, 30, 40 and 63 K
- ANSI (or JPI) 150, 300, 600 and 900 Lb RF
● Flange material :
- A105, A182-F304, A182-F316, A182-F11,
- A182-F22 and A350-LF2
● Materials of bolts and nuts :
- Stud blots : SNB7, A193-B7 and A194-B8
- Nuts : S45C, A194-2H and A194-8
- Jack bolts and nuts : S25C and A307
● Gasket :
- Thickness : 4.5 mm
- Material : Spiral wound gaskets
● Piping connection method :
- ANSI 150 Lb : Insertion welding type (Slip-on type)
- ANSI 300, 600 Lb : Butt welding type (Welding neck)
- ANSI 900 Lb : Butt welding neck (Ring-joint WN)
● Differential pressure piping connection : Select referring to the model number construction table
● Orifice bore type :
- Concentric square edged orifice
- Quadrant edged orifice
- Eccentric orifice
- Segmental orifice
● Flow claculation standards :
- ISO 5167-1 and 2 2003
- AGA-3
- ASME MFC-3M (R.W Miller)
- L.K. Spink
- JIS Z 8762
● 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 B/C, Titanium 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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