ST500 Series Universal Orifice Plates

4” ORIFICE PLATE

ST500 Series ‘Universal’ Orifice Plates

Universal orifice plates are used within orifice meters (see Roto-Boss™ brochure), some types of Orifice Flange Unions and also in Annular Chambers. They are termed as “universal” as they are manufactured to industry standard outer diameters and plate thicknesses to comply with measurement standards such as MFC-3M, ISO 5167 and AGA 3.

Features

  • TAG, ANSI Class, Size (in DN), Bore, Material & Type etched on periphery of plate
  • Orifice bore/plate type: SQC (Square edge concentric), 1/4 (Quarter Circle), CON (Conical), SQE (Eccentric), SEG (Segmental)
  • Materials: Carbon Steel, Stainless Steel 304 & 316, Duplex, Super Duplex, Monel, Inconel
  • Sizes: 0.5” to 24” (15DN to 600DN) – other sizes available upon request provider rather than a generic distributor
  • Drain or Vent holes can be added for AGA 3 plates. ISO 5167 does not permit the use of drain or vent holes
  • Manufactured in accordance with ISO 5167, AGA 3, MFCM-3M

As with any orifice plate application, there are a few types of bore inlet depending upon the flowing medium that is being measured. Below is a reference guide based for orifice plate inlets based on flowing medium;

Flowing MediumSquare edge orificeQuarter circle or conical entrance orifice Eccentric orificeSegmental orifice
Gasclean++++
dirty++++
Liquidclean++++++
viscous++
dirty++++
corrosive+++
Steam+++

++ preferred + suitable not suitable

Nominal Pipe SizePlate O.D in inchesPlate Thickness
2”2.4370.125
3”3.4370.125
4”4.4060.125
6”6.4370.125
8”8.4370.250
10”10.6870.250
12”12.5930.250
14”14.0000.250
16”16.0000.375
18”18.0000.375
20”20.0000.500
24”24.0000.500
ORDERING INFORMATIONPart number format for ordering is as follows; SIZE-ANSI-TYPE-BORE-MTL
Size0.5” – 24” (other sizes available upon request)
ANSI150, 300, 600, 900, 1500 & 2500
Bore‘d’ dimension in inches (provided by the customer or sized by calculation)
Hole (if required)V = Vent, D = Drain
MTL304 = 304 St. Steel
316 = 316 St. Steel
D = Duplex
SD = Super Duplex
M = Monel
I = Inconel
WORKED EXAMPLESNote: “V” or “D” is indicated in the part number only if a Vent or Drain is required
ST500OP-14-150-SQC-0.5-31614” 150 ANSI, Square Edge Concentric with a 0.5” bore in 316 St. Steel
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