For Use With For Use With |
---|
|
|
Bolt Circle Diameter Bolt Circle Diameter |
---|

|
|
|
Maximum Pressure Maximum Pressure |
---|
|
Maximum Steam Pressure Maximum Steam Pressure |
---|
|
REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
---|
|
RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
---|
|
DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
---|
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 Threaded Pipe Flanges


- 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 or 150 iron and steel
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.
For technical drawings and 3-D models, click on a part number.
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 | Black-Coated Iron | 000000000 | 000000 |
1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 125 psi @ 72° F | 125 psi @ 350° F | Black-Coated 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 | Black-Coated Iron | 000000000 | 00000 |
1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 125 psi @ 72° F | 125 psi @ 350° F | Black-Coated Iron | 000000000 | 00000 |
2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 125 psi @ 72° F | 125 psi @ 350° F | Black-Coated Iron | 000000000 | 00000 |
2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 125 psi @ 72° F | 125 psi @ 350° F | Black-Coated Iron | 000000000 | 00000 |
3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 125 psi @ 72° F | 125 psi @ 350° F | Black-Coated Iron | 000000000 | 00000 |
4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 125 psi @ 72° F | 125 psi @ 350° F | Black-Coated Iron | 000000000 | 000000 |
5 | 10" | 3/4" | 7/8" | 8 | 8 1/2" | 125 psi @ 72° F | 125 psi @ 350° F | Black-Coated Iron | 000000000 | 000000 |
6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 125 psi @ 72° F | 125 psi @ 350° F | Black-Coated Iron | 000000000 | 000000 |
8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 125 psi @ 72° F | 125 psi @ 350° F | Black-Coated Iron | 000000000 | 000000 |
Low-Pressure Steel Threaded Pipe Flanges
Use these flanges for low-pressure applications in noncorrosive environments. Bolt two flanges of the same size together with a gasket (sold separately) to create an access point within a line.
For technical drawings and 3-D models, click on a part number.


- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Specifications Met:
NPT: ASME B16.5, ASTM A105, MSS SP-25
BSPT: ASTM A105 - Pipe Nipples and Pipe: Use Schedule 40 steel
- Fittings: Use Class 125 or 150 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 | |
BSPT | ||||||||||
1/2 | 3 1/2" | 5/8" | 5/8" | 4 | 2 3/8" | 285 psi @ 72° F | 230 psi @ 300° F | Black-Coated Steel | 0000000 | 000000 |
3/4 | 3 7/8" | 5/8" | 5/8" | 4 | 2 3/4" | 285 psi @ 72° F | 230 psi @ 300° F | Black-Coated Steel | 0000000 | 00000 |
1 | 4 1/4" | 5/8" | 5/8" | 4 | 3 1/8" | 285 psi @ 72° F | 230 psi @ 300° F | Black-Coated Steel | 0000000 | 00000 |
1 1/4 | 4 5/8" | 5/8" | 5/8" | 4 | 3 1/2" | 285 psi @ 72° F | 230 psi @ 300° F | Black-Coated Steel | 0000000 | 00000 |
1 1/2 | 5" | 5/8" | 0.62" | 4 | 3 7/8" | 285 psi @ 72° F | 230 psi @ 300° F | Black-Coated Steel | 0000000 | 00000 |
2 | 6" | 3/4" | 3/4" | 4 | 4 3/4" | 285 psi @ 72° F | 230 psi @ 300° F | Black-Coated Steel | 0000000 | 00000 |
2 1/2 | 7" | 3/4" | 3/4" | 4 | 5 1/2" | 285 psi @ 72° F | 230 psi @ 300° F | Black-Coated Steel | 0000000 | 000000 |
3 | 7 1/2" | 3/4" | 3/4" | 4 | 6" | 285 psi @ 72° F | 230 psi @ 300° F | Black-Coated Steel | 0000000 | 00000 |
4 | 9" | 3/4" | 3/4" | 8 | 7 1/2" | 285 psi @ 72° F | 230 psi @ 300° F | Black-Coated Steel | 0000000 | 000000 |
6 | 11" | 7/8" | 7/8" | 8 | 9 1/2" | 285 psi @ 72° F | 230 psi @ 300° F | Black-Coated Steel | 0000000 | 000000 |