Principle: EMCO orifice plates are used as primary elements in flow measurement
of liquid, gas and steam according to the differential pressure principle.
Design and calculation standards
|
ISO 5167-2, ASME MFC-3M, ISA RP 3.2, Shell Flow Meter Engineering Handbook, L. K. Spink, AGA no. 3
|
Sizes
|
1" - 24" according to ANSI b 16.36, 50 mm < D < 1000 mm according to ISO 5167-2 and 50 mm < D < 900 mm according to ASME MFC-3M
|
Pressure rating
|
300 - 2500 lbs RF
|
Plate thickness
|
3 - 16 mm depending on plate size
|
Bore (d)
|
d > 12,5 mm
|
β (d/D)
|
0,2 < β < 0,75 for highest accuracy.
|
Vent or drain hole
|
On request
|
Material
|
AISI 316, Duplex, Monel, 6Mo, Titanium, others on request
|
Mounting style
|
Between raised face flanges according To ANSI B16.36 or DIN 19214, other standards on request
|
Orifice plate shapes
|
See above illustration. Square edge concentric, conical, 1/4 circle, segment
|
Handle
|
With name plate in AISI 316 with the following inscription : TAG no., serial no., pressure rating, inner pipe diameter., bore, material.
|
Accuracy
|
+/- 0,6 % for β < 0,6 and equal to β for values above 0,6
|
Pressure loss
|
Depending on β, for β equal to 0,6 : ca. 60 % of the differential pressure measured
|
Limits for Reynolds No
|
Re > 1260 x β^2 D according to ISO 5167 2000 < Re < 10^8 according to ASME MFC-3M
|