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Let USA Industries' professional engineers calculate the correct bore size based on process data for the project.

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Universal Orifice Plates (Series 500) & Seal Rings

For use in All Standard Orifice Fitting Assemblies or Ring Type Joint Plate Holders

USA Industries' Series 500 Universal Orifice Plates are designed to be used with all standard orifice fitting assemblies or ring type joint plate holders. Standard industry sizing allows our plates to be used with any of the dual or single-chambered orifice fittings on the market. These orifice plates are the most commonly used method of differential pressure flow measurement due to their simplicity, predictable and reliable performance, ease of installation, and tolerance to extreme atmospheric conditions.

The Series 500 Universal Orifice Plates conform to the most stringent manufacturing processes in order to achieve optimum accuracy standards in the industry. If you require, our engineering staff will run your orifice bore calculations quickly and accurately on a fee basis.

Orifice plates are stocked in 304 & 316 stainless steel and are available in any material you request. Stocked metals include monel, hastelloy, copper, nickel, and more. USA Industries' will also coat your orifice plates with any coating you require.

Seal rings snap in after the orifice plate is installed into carrier. This creates a seal on the upstream side of the orifice plate and on the upstream side of the fitting seat.

Seal Rings for Series 500 Universal Orifice Plates are sold separately.

Series 500, 520
560, 590 &
Restriction Union
Line Sheet

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SERIES 500 ORIFICE PLATE PRODUCT FEATURES:

  • Meets or exceeds AGA, ISA, ANSI, ASME & API standards
  • Available in any material requested
  • Fast and accurate orifice bore calculation services available
  • USA Industries will provide coatings upon request
  • In-stock items ship within 24 hours

Orifice Plates Sizing Chart

NPS* A L T
1" 1.312" .02" 1/8"
1 1/2" 2" .03" 1/8"
2" 2.437" .03" 1/8"
2 1/2" 2.812" .03" 1/8"
3" 3.437" .03" 1/8"
4" 4.406" .06" 1/8"
5" 6" .06" 1/8"
6" 6.437" .06" 1/8"
8" 8.437" .125" 1/4"
10" 10.687" .125" 1/4"
12" 12.593" .25" 1/4"
14" 14" .25" 1/4"
16" 16" .25" 3/8"
18" 18" .25" 3/8"
20" 20" .375" 3/8"
24" 24" .375" 3/8"
NPS = Nominal Pipe Size
All Sizes in Inches
'A' Dimensions do not include seal ring

Orifice Plate Bore Calculation Form

Frequently Asked Questions