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.
Specification
| Flange mounting type |
Welding neck Slip-on Socket-weld
Ring-joint welding neck |
| Nominal diameter |
25 ~ 600 mm
1" ~ 24" |
| Flange ratings |
JIS 10, 20, 30, 40 and 63 K
ANSI (or JPI) 150, 300, 600, 900, 1500 and 2500Lb RF |
| Flange material |
A105, A182-F304, A182-F316, A182-F11, A182-F22, A350-LF2
and Other |
| Materials of bolts and nuts |
Stud blots : SNB7, A193-B7 and A194-B8 and Other
Nuts : S45C, A194-2H and A194-8 and Other
Jack bolts : 304SS |
| Gasket |
Thickness : 4.5 mm
Material : Spiral wound gaskets |
| 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)
JIS Z 8762 |
| Plate thickness |
3,6,9,12 mm and Over |
| 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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