Filter by
Connects To
Flanged Connection Surface
For Use With
Pipe Schedule
Specifications Met
Maximum Pressure @ Temperature
Fabrication
Export Control Classification Number (ECCN)
DFARS Specialty Metals
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
FM-Approved Low-Pressure Cast Iron Unthreaded Pipe Flanges
Front
Flat Surface on Back
- For Use With: Air, Diesel Fuel, Gasoline, Natural Gas, Oil, Steam, Water
- Pressure Class: 125
- Specifications Met: ASME B1.20.1, ASME B16.1, ASTM A126, FM Approved
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Fittings: Use Class 125 or 150 iron and steel
FM-approved for fire protection applications, these flanges are cast iron, so they're brittle and can be quickly opened by hitting them with a sledge hammer. Bolt them together with a gasket (not included) to create an access point within a low-pressure pipe line. All are cap flanges, which are also known as blind flanges. Use them in noncorrosive environments.
Bolt Hole | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Each | |
| 1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 000000 |
| 1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 00000 |
| 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 00000 |
| 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 00000 |
| 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 00000 |
| 3 1/2 | 8 1/2" | 5/8" | 3/4" | 8 | 7" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 000000 |
| 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 000000 |
| 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 000000 |
Low-Pressure Iron and Steel Threaded Pipe Fittings
Use these fittings for low-pressure applications in noncorrosive environments.
Bushing Straight Reducing Adapters
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class: See table
- Specifications Met: ASME B16.14
- Pipe Nipples and Pipe: Use Schedule 40 steel
Pipe Size | |||||||
|---|---|---|---|---|---|---|---|
| (A) | (B) | Pressure Class | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Male × NPT Female | |||||||
| 1/4 | 1/8 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Steel | 000000000 | 00000 |
| 3/8 | 1/8 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Steel | 000000000 | 0000 |
| 3/8 | 1/4 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Steel | 000000000 | 0000 |
| 1/2 | 1/8 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Steel | 000000000 | 0000 |
| 1/2 | 1/4 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Steel | 000000000 | 0000 |
| 1/2 | 3/8 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Steel | 000000000 | 0000 |
| 3/4 | 1/8 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Steel | 000000000 | 0000 |
| 3/4 | 1/4 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Steel | 000000000 | 0000 |
| 3/4 | 3/8 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Steel | 000000000 | 0000 |
| 3/4 | 1/2 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Steel | 000000000 | 0000 |
| 1 | 1/4 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Steel | 000000000 | 0000 |
| 1 | 3/8 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Steel | 000000000 | 0000 |
| 1 | 1/2 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Steel | 000000000 | 0000 |
| 1 | 3/4 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Steel | 000000000 | 0000 |
| 1 1/4 | 3/4 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Iron | 000000000 | 00000 |
| 1 1/4 | 1 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Iron | 000000000 | 00000 |
| 1 1/2 | 3/4 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Iron | 000000000 | 00000 |
| 1 1/2 | 1 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Iron | 000000000 | 00000 |
| 1 1/2 | 1 1/4 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Iron | 000000000 | 00000 |
| 2 | 1 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Iron | 000000000 | 00000 |
| 2 | 1 1/4 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Iron | 000000000 | 00000 |
| 2 | 1 1/2 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Iron | 000000000 | 00000 |
| 2 1/2 | 1 1/4 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Iron | 000000000 | 00000 |
| 2 1/2 | 2 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Iron | 000000000 | 00000 |
| 3 | 2 | 125 | 150 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 00000 |
| 3 | 2 1/2 | 150 | 150 psi @ 72° F | 150 psi @ 350° F | Iron | 000000000 | 00000 |
| 4 | 3 | 125 | 150 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 000000 |
FM-Approved Low-Pressure Cast Iron Threaded Pipe Flanges
Suitable for use in fire-protection applications, these flanges are brittle and can be quickly opened with the strike of a sledge hammer. Bolt two flanges of the same size together with a gasket (sold separately) to create an access point within a line. Use in noncorrosive environments.
Reducing flanges transition your system to a smaller pipe size. Attach them to a flange with a larger pipe size but with the same flange dimensions.
Flanges
Front
Flat Surface on Back
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met:
3/4 Pipe Size: ASME B1.20.1, ASME B16.1, ASTM A126, FM Approved
All other sizes: ASME B1.20.1, ASME B16.1, ASTM A126, FM Approved, UL Listed - Pipe Nipples and Pipe: Use Schedule 40 steel
- Fittings: Use Class 125 iron and steel
Bolt Hole | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT | ||||||||||
| 3/4 | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 000000 |
| 1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 00000 |
| 1 1/4 | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 00000 |
| 1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 00000 |
| 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 00000 |
| 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 00000 |
| 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 00000 |
| 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 000000 |
| 5 | 10" | 3/4" | 7/8" | 8 | 8 1/2" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 000000 |
| 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 000000 |
| 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 125 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 000000 |
Reducing Flanges
Front
Flat Surface on Back
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met: ASME B1.20.1, ASME B16.1, ASTM A126, ASTM A153, FM Approved
- Pipe Nipples and Pipe: Use Schedule 40 iron and steel
- Fittings: Use Class 125 iron and steel
Bolt Hole | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | For Flange Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT | |||||||||||
| 2 | 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 175 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 000000 |
| 2 | 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 175 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 000000 |
| 2 | 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 175 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 000000 |
| 3 | 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 175 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 000000 |
| 4 | 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 175 psi @ 72° F | 125 psi @ 350° F | Iron | 000000000 | 000000 |
Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings
The galvanized finish on these fittings provides fair corrosion resistance. Fittings are for use in low-pressure applications.
Locknuts thread onto the male end of a fitting to provide extra holding power so the fitting won’t loosen from vibration.
NPSC (National Pipe Straight Coupling) threads and NPSL (National Pipe Straight Locknut) threads are compatible with NPT threads.
Locknut
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class: 150
- Specifications Met: ASME B16.14
- Pipe Nipples and Pipe: Use Schedule 40 galvanized steel
- Flanges: Use Class 150 galvanized steel
FM-Approved Iron Pipe Fittings with Flanged Ends
FM approved, these fittings are suitable for use in fire-protection systems. All have flat-surface flanged ends that only mate to another same-size flat-surface flange, pump, or valve with a gasket (sold separately) to create an access point in a pipeline. Use them in noncorrosive areas.
Straight Reducers
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met: FM Approved, UL Listed, ASTM A126, ASTM B307, Fed. Spec. WW-F-406, ASME B16.1, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Flanges: Use Class 150 steel
Pipe Size | Flange OD | Bolt Hole | Bolt Circle Dia. | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (A) | (B) | (A) | (B) | For Bolt Dia. | Dia. | No. of | (A) | (B) | Max. Pressure | Max. Steam Pressure | Material | Each | |
| 2 1/2 | 2 | 7" | 6" | 5/8" | 3/4" | 4 | 5 1/2" | 4 3/4" | 150 psi @ 72° F | 125 psi @ 350° F | Iron | 0000000 | 0000000 |
| 3 | 2 | 7 1/2" | 6" | 5/8" | 3/4" | 4 | 6" | 4 3/4" | 150 psi @ 72° F | 125 psi @ 350° F | Iron | 0000000 | 000000 |
| 3 | 2 1/2 | 7 1/2" | 7" | 5/8" | 3/4" | 4 | 6" | 5 1/2" | 150 psi @ 72° F | 125 psi @ 350° F | Iron | 0000000 | 000000 |
| 4 | 3 | 9" | 7 1/2" | 5/8" | 3/4" | 8 | 7 1/2" | 6" | 150 psi @ 72° F | 125 psi @ 350° F | Iron | 0000000 | 000000 |
90° Elbow Connectors
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met: FM Approved, UL Listed, ASTM A126, ASTM B307, Fed. Spec. WW-F-406, ASME B16.1, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Flanges: Use Class 150 steel
Bolt Hole | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Material | Each | |
| 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 150 psi @ 72° F | 125 psi @ 350° F | Iron | 0000000 | 0000000 |
| 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 150 psi @ 72° F | 125 psi @ 350° F | Iron | 0000000 | 000000 |
| 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 150 psi @ 72° F | 125 psi @ 350° F | Iron | 0000000 | 000000 |
| 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 150 psi @ 72° F | 125 psi @ 350° F | Iron | 0000000 | 000000 |
45° Elbow Connectors
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met: FM Approved, UL Listed, ASTM A126, ASTM B307, Fed. Spec. WW-F-406, ASME B16.1, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Flanges: Use Class 150 steel
Tee Connectors
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met: FM Approved, UL Listed, ASTM A126, ASTM B307, Fed. Spec. WW-F-406, ASME B16.1, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Flanges: Use Class 150 steel
Bolt Hole | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Material | Each | |
| 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 150 psi @ 72° F | 125 psi @ 350° F | Iron | 0000000 | 0000000 |
| 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 150 psi @ 72° F | 125 psi @ 350° F | Iron | 0000000 | 000000 |
| 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 150 psi @ 72° F | 125 psi @ 350° F | Iron | 0000000 | 000000 |
| 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 150 psi @ 72° F | 125 psi @ 350° F | Iron | 0000000 | 000000 |