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Pressure Class Pressure Class | Show |
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Material Material |
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For Pipe Material For Pipe Material |
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Thread Type Thread Type |
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Type Type |
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| Flange | Adapter |
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| Reducing Adapter | Cap |
Connection Style Connection Style |
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| Threaded |
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| Slip-On Weld |
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| Butt Weld |
Flanged Connection Surface Flanged Connection Surface |
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System of Measurement System of Measurement |
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For Pipe Schedule For Pipe Schedule |
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Bolt Circle Diameter Bolt Circle Diameter |
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Connection Type Connection Type |
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 | Pipe |
Maximum Pressure Maximum Pressure |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Gender Gender |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Specifications Met Specifications Met |
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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.
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Low-Pressure Aluminum Threaded Pipe Flanges
Also known as Pressure 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; attach to a flange with a larger pipe size but with the same flange dimensions.
For technical drawings and 3-D models, click on a part number.
Flanges
Front
Flat Surface on Back
- For Use With: Air, Oil, Water
- Pressure Class: 125
- Specifications Met:
Pipe Size 1-6: 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" | 150 psi @ 72° F | 000000000 | 000000 |
| 3/4 | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 150 psi @ 72° F | 000000000 | 00000 |
| 1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 150 psi @ 72° F | 000000000 | 00000 |
| 1 1/4 | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 150 psi @ 72° F | 000000000 | 00000 |
| 1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 150 psi @ 72° F | 000000000 | 00000 |
| 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 150 psi @ 72° F | 000000000 | 00000 |
| 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 150 psi @ 72° F | 000000000 | 00000 |
| 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 150 psi @ 72° F | 000000000 | 00000 |
| 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 150 psi @ 72° F | 000000000 | 00000 |
| 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
| 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 150 psi @ 72° F | 000000000 | 000000 |
Reducing Flanges
Front
Flat Surface on Back
- For Use With: Air, Oil, Water
- Pressure Class: 125
- Specifications Met: ASME B16.1
- Fittings: Use Class 150 aluminum
- Pipe Nipples and Pipe: Use Schedule 40 aluminum
Bolt Hole | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | For Flange Pipe Size | 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" | 150 psi @ 72° F | 000000000 | 000000 |
| 3/4 | 1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 150 psi @ 72° F | 000000000 | 00000 |
| 1 | 1 1/4 | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 150 psi @ 72° F | 000000000 | 00000 |
| 1 1/4 | 1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 150 psi @ 72° F | 000000000 | 00000 |
| 1 1/2 | 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 150 psi @ 72° F | 000000000 | 00000 |
| 2 | 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 150 psi @ 72° F | 000000000 | 00000 |
| 2 | 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 150 psi @ 72° F | 000000000 | 00000 |
| 3 | 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
| 4 | 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
| 6 | 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 150 psi @ 72° F | 000000000 | 000000 |
Aluminum Unthreaded Pipe Flanges
Also known as Pressure 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.
Butt-weld flanges are also known as weld-neck flanges; the flange neck has a beveled end that, when flush to pipe, creates a trough for a strong weld. Slip-on weld flanges have no internal stop; slide a pipe through the flange and weld on both sides. Reducing flanges let you transition your system to a smaller pipe size; attach to a flange with a larger pipe size but with the same flange dimensions. Cap flanges are also known as blind flanges.
For technical drawings and 3-D models, click on a part number.
Butt-Weld Flanges
Front
Flat Surface on Back
- For Use With: Air, Oil, Water
- Pressure Class : 125
- Specifications Met: ASME B16.1
- Fittings: Use Schedule 40 aluminum
- Pipe: Use Schedule 40 aluminum
Bolt Hole | ||||||||
|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Each | |
| 1/2 | 3 1/2" | 1/2" | 5/8" | 4 | 2 3/8" | 150 psi @ 72° F | 000000000 | 000000 |
| 3/4 | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 150 psi @ 72° F | 000000000 | 00000 |
| 1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 150 psi @ 72° F | 000000000 | 00000 |
| 1 1/4 | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 150 psi @ 72° F | 000000000 | 00000 |
| 1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 150 psi @ 72° F | 000000000 | 00000 |
| 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 150 psi @ 72° F | 000000000 | 00000 |
| 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
| 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 150 psi @ 72° F | 000000000 | 000000 |
| 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
| 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
| 8 | 13 1/2" | 3/4" | 3/4" | 8 | 11 3/4" | 150 psi @ 72° F | 000000000 | 000000 |
Slip-On Weld Flanges
Front
Flat Surface on Back
- For Use With: Air, Oil, Water
- Pressure Class : 125
- Specifications Met: ASME B16.1
- Fittings: Use Schedule 40 aluminum
- Pipe: Use Schedule 40 aluminum
Bolt Hole | ||||||||
|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Each | |
| 1/2 | 3 1/2" | 1/2" | 5/8" | 4 | 2 3/8" | 150 psi @ 72° F | 00000000 | 000000 |
| 3/4 | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 150 psi @ 72° F | 00000000 | 00000 |
| 1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 150 psi @ 72° F | 000000000 | 00000 |
| 1 1/4 | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 150 psi @ 72° F | 000000000 | 00000 |
| 1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 150 psi @ 72° F | 000000000 | 00000 |
| 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 150 psi @ 72° F | 000000000 | 00000 |
| 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 150 psi @ 72° F | 000000000 | 00000 |
| 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 150 psi @ 72° F | 000000000 | 00000 |
| 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 150 psi @ 72° F | 000000000 | 00000 |
| 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
| 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 150 psi @ 72° F | 000000000 | 000000 |
Slip-On Weld Reducing Flanges
Front
Flat Surface on Back
- For Use With: Air, Oil, Water
- Pressure Class : 125
- Specifications Met: ASME B16.1
- Fittings: Use Schedule 40 aluminum
- Pipe: Use Schedule 40 aluminum
Bolt Hole | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | For Flange Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Each | |
| 1/2 | 3/4 | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 150 psi @ 72° F | 000000000 | 000000 |
| 3/4 | 1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 150 psi @ 72° F | 000000000 | 00000 |
| 1 | 1 1/4 | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 150 psi @ 72° F | 000000000 | 00000 |
| 1 1/4 | 1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 150 psi @ 72° F | 000000000 | 00000 |
| 1 1/2 | 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 150 psi @ 72° F | 000000000 | 00000 |
| 2 | 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 150 psi @ 72° F | 000000000 | 00000 |
| 2 | 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 150 psi @ 72° F | 000000000 | 00000 |
| 3 | 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
| 4 | 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
| 6 | 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 150 psi @ 72° F | 000000000 | 000000 |
Caps
Front
Flat Surface on Back
- For Use With: Air, Oil, Water
- Pressure Class : 125
- Specifications Met: ASME B16.1
- Fittings: Use Schedule 40 aluminum
- Pipe: Use Schedule 40 aluminum
Bolt Hole | ||||||||
|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Each | |
| 1/2 | 3 1/2" | 1/2" | 5/8" | 4 | 2 3/8" | 150 psi @ 72° F | 000000000 | 000000 |
| 3/4 | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 150 psi @ 72° F | 000000000 | 00000 |
| 1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 150 psi @ 72° F | 000000000 | 00000 |
| 1 1/4 | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 150 psi @ 72° F | 000000000 | 00000 |
| 1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 150 psi @ 72° F | 000000000 | 00000 |
| 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 150 psi @ 72° F | 000000000 | 00000 |
| 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 150 psi @ 72° F | 000000000 | 00000 |
| 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 150 psi @ 72° F | 000000000 | 00000 |
| 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
| 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 150 psi @ 72° F | 000000000 | 000000 |
| 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 150 psi @ 72° F | 000000000 | 000000 |