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


Paddle Type Orifice Plates (Series 520)

Series 520 Paddle Type Plates are Manufactured for Use with Raised Face Orifice Flanges and Holding Blocks

USA Industries' Series 520 Paddle Type Orifice Plates are manufactured for use with Raised Face Orifice Flanges and Holding Blocks. Skilled craftsmen and state-of-the-art machining practices ensure that our paddle orifice plates meet or exceed the stringent requirements of AGA, ISA, ANSI, ASME & API Standards.

We use state-of-the-art CNC machines to cut our paddle type orifice plates. As a result our plates conform to the most stringent manufacturing processes and achieve optimum accuracy standards. And with a staff of professionally trained mechanical engineers, will run your bore calculations quickly and accurately for an additional fee.

We stock our orifice plates in 304 & 316 stainless steels, but we will manufacture your plates in any material that you request. Stocked metals include, monel, hastelloy, copper, nickel, and more. USA Industries' can also coat your orifice plates with any coating you require.

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

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Orifice Plate Bore Calculation Form


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

Frequently Asked Questions

Select Flange Rating to see specs.

Flange Rating
Line Size A HL HW T
Please select Flange Rating
• All Sizes in Inches
• Additional Sizes Available