Search Results
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
Low-Pressure Aluminum Threaded Pipe Flanges
Also known as Class 125 flanges, these are for use in low-pressure applications. Bolt two same-size flanges together with a gasket (sold separately) to create an access point within a line. Flanges are aluminum, which is lightweight with good corrosion resistance.
Reducing flanges allow you to transition your system to a smaller pipe size.
For technical drawings and 3-D models, click on a part number.
Flanges
Front
Flat Surface on Back
- For Use With: Air, Oil, Water
- Class: 125
- Specifications Met:
Pipe Size 1-6: ANSI/ASME B16.1 - Fittings: Use Class 150 aluminum
- Pipe Nipples and Pipe: Use Schedule 40 aluminum
Bolt Hole | ||||||||
|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Each | |
NPT | ||||||||
| 1/2 | 3 1/2" | 1/2" | 5/8" | 4 | 2 3/8" | 125 psi @ 72° F | 000000000 | 000000 |
| 3/4 | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 125 psi @ 72° F | 000000000 | 00000 |
| 1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 125 psi @ 72° F | 000000000 | 00000 |
| 1 1/4 | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 125 psi @ 72° F | 000000000 | 00000 |
| 1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 125 psi @ 72° F | 000000000 | 00000 |
| 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 125 psi @ 72° F | 000000000 | 00000 |
| 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 125 psi @ 72° F | 000000000 | 00000 |
| 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 125 psi @ 72° F | 000000000 | 00000 |
| 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 125 psi @ 72° F | 000000000 | 00000 |
| 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 125 psi @ 72° F | 000000000 | 000000 |
| 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 125 psi @ 72° F | 000000000 | 000000 |
Reducing Flanges
Front
Flat Surface on Back
- For Use With: Air, Oil, Water
- Class: 125
- Specifications Met: ANSI/ASME B16.1
- Fittings: Use Class 150 aluminum
- Pipe Nipples and Pipe: Use Schedule 40 aluminum
Pipe Size | Bolt Hole | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Threaded | Flanged | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Each | |
NPT | |||||||||
| 1/2 | 3/4 | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 125 psi @ 72° F | 000000000 | 000000 |
| 3/4 | 1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 125 psi @ 72° F | 000000000 | 00000 |
| 1 | 1 1/4 | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 125 psi @ 72° F | 000000000 | 00000 |
| 1 1/4 | 1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 125 psi @ 72° F | 000000000 | 00000 |
| 1 1/2 | 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 125 psi @ 72° F | 000000000 | 00000 |
| 2 | 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 125 psi @ 72° F | 000000000 | 00000 |
| 2 | 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 125 psi @ 72° F | 000000000 | 00000 |
| 3 | 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 125 psi @ 72° F | 000000000 | 00000 |
| 4 | 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 125 psi @ 72° F | 000000000 | 000000 |
| 6 | 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 125 psi @ 72° F | 000000000 | 000000 |