Filter by
Pipe Size
DFARS Compliance
Pressure Class
How to Identify and Measure Fittings
Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.
More
High-Pressure Steel Threaded Pipe Flanges
Front
Raised Surface on Back
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Pressure Class: 1500
- Specifications Met:
1/2 to 2 Pipe Sizes: ASME B16.5, ASTM A105, MSS SP-25, MSS SP-6
All other sizes: ASTM A105 - Pipe Nipples and Pipe: Use Schedule 160 or XXH steel
- Fittings: Use Class 3000 or 6000 iron and steel
Also known as Pressure Class 1500 flanges, these have the strength to handle high pressures. Bolt two same-size flanges together with a gasket (sold separately) to create an access point within a line. Flanges are for use in noncorrosive environments.
For technical drawings and 3-D models, click on a part number.
Bolt Hole | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size  | Dash Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT | |||||||||||
| 1/2 | 08 | 4 3/4" | 3/4" | 7/8" | 4 | 3 1/4" | 3,700 psi @ 72° F | 3,200 psi @ 300° F | Steel | 0000000 | 0000000 |
| 3/4 | 12 | 5 1/8" | 3/4" | 7/8" | 4 | 3 1/2" | 3,700 psi @ 72° F | 3,200 psi @ 300° F | Steel | 0000000 | 000000 |
| 1 | 16 | 5 7/8" | 7/8" | 1" | 4 | 4" | 3,700 psi @ 72° F | 3,200 psi @ 300° F | Steel | 0000000 | 000000 |
| 1 1/4 | 20 | 6 1/4" | 7/8" | 1" | 4 | 4 3/8" | 3,700 psi @ 72° F | 3,200 psi @ 300° F | Steel | 0000000 | 000000 |
| 1 1/2 | 24 | 7" | 1" | 1 1/8" | 4 | 4 7/8" | 3,700 psi @ 72° F | 3,200 psi @ 300° F | Steel | 0000000 | 000000 |
| 2 | 32 | 8 1/2" | 7/8" | 1" | 8 | 6 1/2" | 3,700 psi @ 72° F | 3,200 psi @ 300° F | Steel | 0000000 | 000000 |
| 3 | 48 | 10 1/2" | 1 1/4" | 1 1/4" | 8 | 8" | Not Rated | Not Rated | Steel | 0000000 | 000000 |
| 4 | 64 | 12 1/4" | 1.38" | 1.38" | 8 | 9 1/2" | Not Rated | Not Rated | Steel | 0000000 | 000000 |