Series 520 Paddle Type Orifice Plates

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


  • 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

Yes, we typically use the bore calculations provided to us by the customer, but we can do the bore calculations upon request for a small additional fee.

Yes, our four bore options are concentric, eccentric, quadrant and segment.

Yes, we're happy to engineer in a vent or drain. Let us know your specs and we'll manufacture it to meet your exact needs.

Yes, we can completely customize your orifice plates to your unique needs.

We stock our orifice plates in 304 & 316 stainless steel, but they are available in any material requested. We have produced orifice plates for clients in everything from monel to hastelloy to copper-nickel alloys and more!

Yes, we regularly coat our orifice plates for customers that request it. Just let us know what you need and we'll take care of you!


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