Ring Type Joint Orifice Plates (RTJ Orifice Plates)
RTJ Plates Available in Series 560 or Series 590 Plate Holders
RTJ Type Orifice Plates incorporate an integral gasket (oval or octagonal ring) that mounts between ring type joint flanges. There are no moving parts and they are suitable for high-temperature and high-pressure applications. We recommend that RTJ Type Orifice Plates be used for clean liquids, gases and low-velocity steam flows.
Series 560 Plates
Series 560 plates are an integral design with the RTJ and plate being machined as one piece. The Series 560 style is available in all ring sizes and is stocked in both 304 and 316 stainless steels. We are also happy to manufacture your Series 560 plates in any material you require.
Series 590 Plate Holders
The Series 590 plates are manufactured with hold-down screws and use Universal Plates for the Orifice bore. The 590 Series should be used where frequent replacement or sizing changes are expected. We will manufacture the Series 590 plates with an metal material you request.
Select Flange Rating to see specs ---------------->
| 300# Flange Rating | |||
|---|---|---|---|
| Line Size | Ring Size | A | B |
| 1/2" | R-11 | 29/32" | 4 1/4" |
| 3/4" | R-13 | 1" | |
| 1" | R-16 | ||
| 1 1/2" | R-20 | ||
| 2" | R-23 | 1 1/16" | |
| 2 1/2" | R-26 | 5 1/4" | |
| 3" | R-31 | ||
| 3 1/2" | R-34 | ||
| 4" | R-37 | ||
| 5" | R-41 | 6 1/4" | |
| 6" | R-45 | ||
| 8" | R-49 | 6 1/2" | |
| 10" | R-53 | 1 3/16" | 7 1/2" |
| 12" | R-57 | ||
| 14" | R-61 | ||
| 16" | R-65 | ||
| 18" | R-69 | ||
| 20" | R-73 | 1 1/4" | |
| 24" | R-77 | 1 7/16" | |
| 600# Flange Rating | |||
|---|---|---|---|
| Line Size | Ring Size | A | B |
| 1/2" | R-11 | 29/32" | 4 1/4" |
| 3/4" | R-13 | 1" | |
| 1" | R-16 | ||
| 1 1/2" | R-20 | ||
| 2" | R-23 | 1 1/16" | |
| 2 1/2" | R-26 | 5 1/4" | |
| 3" | R-31 | ||
| 3 1/2" | R-34 | ||
| 4" | R-37 | ||
| 5" | R-41 | 6 1/4" | |
| 6" | R-45 | ||
| 8" | R-49 | 6 1/2" | |
| 10" | R-53 | 1 3/16" | 7 1/2" |
| 12" | R-57 | ||
| 14" | R-61 | ||
| 16" | R-65 | ||
| 18" | R-69 | ||
| 20" | R-73 | 1 1/4" | |
| 24" | R-77 | 1 7/16" | |
| 900# Flange Rating | |||
|---|---|---|---|
| Line Size | Ring Size | A | B |
| 1/2" | R-12 | 1" | 4 1/4" |
| 3/4" | R-14 | ||
| 1" | R-16 | ||
| 1 1/2" | R-20 | ||
| 2" | R-24 | 1 1/16" | 5 1/4" |
| 2 1/2" | R-27 | ||
| 3" | R-31 | ||
| 3 1/2" | - | ||
| 4" | R-37 | ||
| 5" | R-41 | 6 1/4" | |
| 6" | R-45 | ||
| 8" | R-49 | 6 1/2" | |
| 10" | R-53 | 1 3/16" | 7 1/2" |
| 12" | R-57 | ||
| 14" | R-62 | 1 7/16" | |
| 16" | R-66 | ||
| 18" | R-70 | 1 9/16" | |
| 20" | R-74 | ||
| 24" | R-78 | 1 7/8" | 9 1/2" |
| 1500# Flange Rating | |||
|---|---|---|---|
| Line Size | Ring Size | A | B |
| 1/2" | R-12 | 1" | 6 1/2" |
| 3/4" | R-14 | ||
| 1" | R-16 | ||
| 1 1/2" | R-20 | ||
| 2" | R-24 | 1 1/16" | |
| 2 1/2" | R-27 | ||
| 3" | R-35 | ||
| 3 1/2" | - | ||
| 4" | R-39 | ||
| 5" | R-44 | ||
| 6" | R-46 | 1 3/16" | |
| 8" | R-50 | 1 5/16" | |
| 10" | R-54 | 1 7/16" | 7 1/2" |
| 12" | R-58 | 1 11/16" | 8 1/2" |
| 14" | R-63 | 1 7/8" | |
| 16" | R-67 | 2" | 9 1/2" |
| 18" | R-71 | ||
| 20" | R-75 | 2 1/8" | 10 1/2" |
| 24" | R-79 | 2 5/16" | 11 1/2" |
| 2500# Flange Rating | |||
|---|---|---|---|
| Line Size | Ring Size | A | B |
| 1/2" | R-13 | 1" | 6 1/2" |
| 3/4" | R-16 | ||
| 1" | R-18 | ||
| 1 1/2" | R-23 | 1 1/16" | |
| 2" | R-26 | 1 3/16" | |
| 2 1/2" | R-28 | ||
| 3" | R-32 | ||
| 3 1/2" | - | - | |
| 4" | R-38 | 1 5/16" | |
| 5" | R-42 | 1 7/16" | 7 1/2" |
| 6" | R-47 | ||
| 8" | R-51 | 1 9/16" | 8 1/2" |
| 10" | R-55 | 2" | |
| 12" | R-60 | 2 1/8" | 9 1/2" |
| 14" | - | - | - |
| 16" | - | - | - |
| 18" | - | - | - |
| 20" | - | - | - |
| 24" | - | - | - |
| Flange Rating | ||||
|---|---|---|---|---|
| Line Size | A | HL | HW | T |
While orifices are typically bored based on your sizing calculation, we also offer sizing calculation services for a minimal fee. All orifice plates are stainless steel by default but can be ordered separately or combined with our restriction orifice unions.
NEED A BORE CALCULATION?
Let USA Industries' engineers calculate the correct bore size based on process data for the project.
Note: USA Industries, Inc.'s orifice bore calculation service is provided on a professional fee basis.
Series 500, 520, 560, 590 & Restriction Union
Line Sheet
Frequently Asked Questions
Ring Type Joint Orifice Plate Holders are available in Series 560 and Series 590 styles.
Series 560 plates are an integral design with the RTJ and plate machined as one piece. Series 590 Plates are manufactured with hold-down screws and use Universal Plates for the Orifice bore.
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!