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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 Steel Unthreaded Pipe Flanges
Bolt two flat-surface flanges or two raised-surface flanges of the same size together with a gasket (sold separately) to create an access point in a pipe line. Flanges are for use with low-pressure applications in noncorrosive environments.
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.
Socket-connect flanges have an internal stop that supports the pipe when welding and prevents the pipe from sliding all the way through.
Stub-end flanges are also known as lap-joint flanges. Use them with a stub-end straight adapter (not included). The stub-end straight adapter slides into the flange and welds to pipe (not the flange). Since the flange isn’t welded to the pipe, it can be disconnected easily for frequent cleaning and inspecting.
Reducing flanges let you transition your piping system to a smaller pipe. 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.
Inch Butt-Weld Flanges
Front
Raised Surface on Back
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: See table
- Specifications Met: See table
- Certification: See table
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Fittings: Use Schedule 40 iron or steel
Bolt Hole | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size  | Wall Thick. | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Pressure Class | Construction | Max. Pressure | Max. Steam Pressure | Certification | Specifications Met | Each | |
| 1/2 | 0.109" | 3 1/2" | 1/2" | 5/8" | 4 | 2 3/8" | 150 | Seamless | 285 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 000000 |
| 3/4 | 0.113" | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 150 | Seamless | 285 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 1 | 0.133" | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 150 | Seamless | 285 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 1 1/4 | 0.14" | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 150 | Seamless | 285 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 1 1/2 | 0.145" | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 150 | Seamless | 285 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 2 | 0.154" | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 150 | Seamless | 285 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 2 1/2 | 0.203" | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 150 | Seamless | 285 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 3 | 0.216" | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 150 | Seamless | 285 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 4 | 0.237" | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 150 | Seamless | 285 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 5 | 0.258" | 10" | 3/4" | 7/8" | 8 | 8 1/2" | 150 | Seamless | 285 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 6 | 0.28" | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 150 | Seamless | 285 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 000000 |
| 8 | 0.322" | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 150 | Seamless | 285 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 000000 |
| 10 | 0.365" | 16" | 7/8" | 1" | 12 | 14 1/4" | 150 | Seamless | 285 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 00000000 | 000000 |
| 12 | 0.406" | 19" | 7/8" | 1" | 12 | 17" | 150 | Seamless | 285 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 00000000 | 000000 |
Metric Butt-Weld Flanges
Front
Back
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met: DIN 2633, DIN 86030, DIN EN 1092-1, DIN 2527
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Fittings: Use Schedule 40 iron or steel
Bolt Hole | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | DN Flange Size | Wall Thick., mm | Flange OD, mm | For Bolt Dia., mm | Dia. | No. of | Bolt Circle Dia., mm | Construction | Max. Pressure | Max. Steam Pressure | Each | |
| 1 | 25 | 3.378 | 115 | 12 | 14 | 4 | 85 | Welded | 230 psi @ 72° F | 180 psi @ 300° F | 0000000 | 000000 |
| 2 | 50 | 3.912 | 165 | 16 | 18 | 4 | 125 | Welded | 230 psi @ 72° F | 180 psi @ 300° F | 0000000 | 00000 |
| 3 | 80 | 5.486 | 200 | 16 | 18 | 8 | 160 | Welded | 230 psi @ 72° F | 180 psi @ 300° F | 0000000 | 00000 |
| 4 | 100 | 6.02 | 220 | 16 | 18 | 8 | 180 | Welded | 230 psi @ 72° F | 180 psi @ 300° F | 0000000 | 00000 |
Inch Slip-On Weld Flanges
Front
Raised Surface on Back
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: See table
- Specifications Met: See table
- Certification: See table
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Fittings: See Table
Bolt Hole | For Fitting | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Pressure Class | Max. Pressure | Max. Steam Pressure | Schedule | Material | Certification | Specifications Met | Each | |
| 1/2 | 3 1/2" | 1/2" | 5/8" | 4 | 2 3/8" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | 40 | Iron, Steel | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 000000 |
| 3/4 | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | 40 | Iron, Steel | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | 40 | Iron, Steel | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 1 | 4 59/64" | 5/8" | 0.748" | 4 | 3 35/64" | __ | Not Rated | Not Rated | 40 | Iron, Steel | __ | ASTM A105, JIS B 2220 | 0000000 | 00000 |
| 1 1/4 | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | 40 | Iron, Steel | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | 40 | Iron, Steel | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 1 1/2 | 5 33/64" | 5/8" | 0.748" | 4 | 4 9/64" | __ | Not Rated | Not Rated | 40 | Iron, Steel | __ | ASTM A105, JIS B 2220 | 0000000 | 00000 |
| 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | 40 | Iron, Steel | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 2 | 6 7/64" | 5/8" | 0.748" | 4 | 4 23/32" | __ | Not Rated | Not Rated | 40 | Iron, Steel | __ | ASTM A105, JIS B 2220 | 0000000 | 00000 |
| 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | 40 | Iron, Steel | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | 40 | Iron, Steel | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | 40 | Iron, Steel | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 5 | 10" | 3/4" | 7/8" | 8 | 8 1/2" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | 40 | Iron, Steel | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | 40 | Iron, Steel | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | 40 | Iron, Steel | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 000000 |
| 10 | 16" | 7/8" | 1" | 12 | 14 1/4" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | 40 | Iron, Steel | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 00000000 | 000000 |
| 12 | 19" | 7/8" | 1" | 12 | 17" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | 40 | Iron, Steel | Material Certificate with Traceable Lot Number and Test Report | ASME B16.5, ASTM A105, MSS SP-25 | 00000000 | 000000 |
Metric Slip-On Weld Flanges
Front
Raised Surface on Back
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met: DIN 2633, DIN 86030, DIN EN 1092-1, DIN 2527
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Fittings: Use Schedule 40 iron or steel
Bolt Hole | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | DN Flange Size | Flange OD, mm | For Bolt Dia., mm | Dia. | No. of | Bolt Circle Dia., mm | Max. Pressure | Max. Steam Pressure | Each | |
| 1 | 25 | 115 | 12 | 14 | 4 | 85 | 230 psi @ 72° F | 180 psi @ 300° F | 0000000 | 000000 |
| 2 | 50 | 165 | 16 | 18 | 4 | 125 | 230 psi @ 72° F | 180 psi @ 300° F | 0000000 | 00000 |
| 3 | 80 | 200 | 16 | 18 | 8 | 160 | 230 psi @ 72° F | 180 psi @ 300° F | 0000000 | 00000 |
| 4 | 100 | 220 | 16 | 18 | 8 | 180 | 230 psi @ 72° F | 180 psi @ 300° F | 0000000 | 00000 |
Inch Slip-On Weld Reducing Flanges
Front
Raised Surface on Back
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Specifications Met: ASME B16.5, ASTM A105
- Certification: Material Certificate with Traceable Lot Number and Test Report
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Fittings: Use Schedule 40 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 | Each | |
| 1 1/2 | 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 285 psi @ 72° F | 230 psi @ 300° F | 00000000 | 0000000 |
| 2 | 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 285 psi @ 72° F | 230 psi @ 300° F | 00000000 | 000000 |
| 3 | 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 285 psi @ 72° F | 230 psi @ 300° F | 00000000 | 000000 |
| 4 | 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 285 psi @ 72° F | 230 psi @ 300° F | 00000000 | 000000 |
| 6 | 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 285 psi @ 72° F | 230 psi @ 300° F | 00000000 | 000000 |
Socket-Connect Flanges
Front
Raised Surface on Back
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Specifications Met: See table
- Certification: Material Certificate with Traceable Lot Number and Test Report
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Fittings: Use Schedule 40 iron or steel
Bolt Hole | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Specifications Met | Each | |
| 1/2 | 3 1/2" | 1/2" | 5/8" | 4 | 2 3/8" | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 000000 |
| 3/4 | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 1 1/4 | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 285 psi @ 72° F | 150 psi @ 300° F | ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 5 | 10" | 3/4" | 7/8" | 8 | 8 1/2" | 285 psi @ 72° F | 150 psi @ 300° F | ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 285 psi @ 72° F | 150 psi @ 300° F | ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 285 psi @ 72° F | 150 psi @ 300° F | ASTM A105, MSS SP-25 | 000000000 | 000000 |
| 10 | 16" | 7/8" | 1" | 12 | 14 1/4" | 285 psi @ 72° F | Not Rated | ASTM A105 | 00000000 | 000000 |
Stub-End Flanges
Flange with Straight Adapter (Front)
Flat Surface on Back
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Specifications Met: MSS SP-25, ASTM A105, ASME B16.5
- Certification: Material Certificate with Traceable Lot Number and Test Report
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Fittings: Use Schedule 40 iron or steel
Flanges | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Bolt Hole | Straight Adapters | ||||||||||
| Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Each | Each | ||
| 1/2 | 3 1/2" | 1/2" | 5/8" | 4 | 2 3/8" | 285 psi @ 72° F | 150 psi @ 300° F | 000000000 | 000000 | 000000000 | 000000 |
| 3/4 | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 285 psi @ 72° F | 150 psi @ 300° F | 000000000 | 00000 | 000000000 | 00000 |
| 1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 285 psi @ 72° F | 150 psi @ 300° F | 000000000 | 00000 | 000000000 | 00000 |
| 1 1/4 | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 285 psi @ 72° F | 150 psi @ 300° F | 000000000 | 00000 | 000000000 | 000000 |
| 1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 285 psi @ 72° F | 150 psi @ 300° F | 000000000 | 00000 | 000000000 | 000000 |
| 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 285 psi @ 72° F | 150 psi @ 300° F | 000000000 | 00000 | 000000000 | 000000 |
| 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 285 psi @ 72° F | 150 psi @ 300° F | 000000000 | 00000 | 000000000 | 000000 |
| 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 285 psi @ 72° F | 150 psi @ 300° F | 000000000 | 00000 | 000000000 | 000000 |
| 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 285 psi @ 72° F | 150 psi @ 300° F | 000000000 | 00000 | 000000000 | 000000 |
| 5 | 10" | 3/4" | 7/8" | 8 | 8 1/2" | 285 psi @ 72° F | 150 psi @ 300° F | 000000000 | 00000 | 000000 | 00 |
| 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 285 psi @ 72° F | 150 psi @ 300° F | 000000000 | 00000 | 000000000 | 000000 |
| 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 285 psi @ 72° F | 150 psi @ 300° F | 000000000 | 000000 | 000000000 | 000000 |
| 10 | 16" | 7/8" | 1" | 12 | 14 1/4" | 285 psi @ 72° F | 150 psi @ 300° F | 00000000 | 000000 | 000000 | 00 |
| 12 | 19" | 7/8" | 1" | 12 | 17" | 285 psi @ 72° F | 150 psi @ 300° F | 00000000 | 000000 | 000000 | 00 |
Inch Caps
Front
Raised Surface on Back
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: See table
- Specifications Met: See table
- Certification: Material Certificate with Traceable Lot Number and Test Report
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Fittings: Use Schedule 40 iron or steel
Bolt Hole | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Pressure Class | Max. Pressure | Max. Steam Pressure | Specifications Met | Each | |
| 1/2 | 3 1/2" | 1/2" | 5/8" | 4 | 2 3/8" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 000000 |
| 3/4 | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 1 | 4 59/64" | 5/8" | 0.748" | 4 | 3 35/64" | __ | Not Rated | Not Rated | ASTM A105, JIS B 2220 | 0000000 | 00000 |
| 1 1/4 | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 1 1/2 | 5 33/64" | 5/8" | 0.748" | 4 | 4 9/64" | __ | Not Rated | Not Rated | ASTM A105, JIS B 2220 | 0000000 | 00000 |
| 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 5 | 10" | 3/4" | 7/8" | 8 | 8 1/2" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 000000 |
| 10 | 16" | 7/8" | 1" | 12 | 14 1/4" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 00000000 | 000000 |
| 12 | 19" | 7/8" | 1" | 12 | 17" | 150 | 285 psi @ 72° F | 150 psi @ 300° F | ASME B16.5, ASTM A105, MSS SP-25 | 00000000 | 000000 |
Metric Caps
Front
Raised Surface on Back
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met: DIN 2633, DIN 86030, DIN EN 1092-1, DIN 2527
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Fittings: Use Schedule 40 iron or steel
Bolt Hole | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | DN Flange Size | Flange OD, mm | For Bolt Dia., mm | Dia. | No. of | Bolt Circle Dia., mm | Max. Pressure | Max. Steam Pressure | Each | |
| 1 | 25 | 115 | 12 | 14 | 4 | 85 | 230 psi @ 72° F | 180 psi @ 300° F | 0000000 | 000000 |
| 2 | 50 | 165 | 16 | 18 | 4 | 125 | 230 psi @ 72° F | 180 psi @ 300° F | 0000000 | 00000 |
| 3 | 80 | 200 | 16 | 18 | 8 | 160 | 230 psi @ 72° F | 180 psi @ 300° F | 0000000 | 00000 |
| 4 | 100 | 220 | 16 | 18 | 8 | 180 | 230 psi @ 72° F | 180 psi @ 300° F | 0000000 | 00000 |
Low-Pressure Steel Unthreaded Pipe Flanges for Low Temperatures
Even in temperatures as low as -46°, these A350 LF2 steel flanges won’t become brittle, so they absorb impact better than other low-pressure steel flanges. Also known as Pressure Class 150 flanges, they’re used in low-pressure lines. Bolt two flanges together with a gasket (not included) to create an access point within a line. All are impact tested to verify their strength.
Butt-weld flanges are also known as weld-neck flanges; the flange neck has a beveled end that, when flush with 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.
Socket-connect flanges have an internal stop that supports the pipe when welding and prevents the pipe from sliding all the way through.
For technical drawings and 3-D models, click on a part number.
Butt-Weld Flanges
Front
Raised Surface on Back
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Specifications Met: ASME B16.5, ASTM A350
- Certification: Material Certificate with Traceable Lot Number and Test Report
- Pipe Nipples and Pipe: Use Schedule 40 ASTM A333 carbon steel
- Fittings: Use Schedule 40 ASTM A420 carbon steel
Bolt Hole | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Wall Thick. | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Temp. Range, °F | Material | Each | |
| 2 | 0.157" | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 000000 |
| 3 | 0.216" | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 00000 |
| 4 | 0.237" | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 00000 |
| 6 | 0.283" | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 000000 |
Slip-On Weld Flanges
Front
Raised Surface on Back
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Specifications Met: ASME B16.5, ASTM A350
- Certification: Material Certificate with Traceable Lot Number and Test Report
- Pipe Nipples and Pipe: Use Schedule 40 ASTM A333 carbon steel
- Fittings: Use Schedule 40 ASTM A420 carbon steel
Bolt Hole | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Temp. Range, °F | Material | Each | |
| 1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 000000 |
| 1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 00000 |
| 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 00000 |
| 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 00000 |
| 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 00000 |
| 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 00000 |
| 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 000000 |
| 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 000000 |
Socket-Connect Flanges
Front
Raised Surface on Back
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Specifications Met: ASME B16.5, ASTM A350
- Certification: Material Certificate with Traceable Lot Number and Test Report
- Pipe Nipples and Pipe: Use Schedule 40 ASTM A333 carbon steel
- Fittings: Use Schedule 40 ASTM A420 carbon steel
Bolt Hole | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Temp. Range, °F | Material | Each | |
| 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 000000 |
| 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 00000 |
| 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 00000 |
Caps
Front
Raised Surface on Back
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Specifications Met: ASME B16.5, ASTM A350
- Certification: Material Certificate with Traceable Lot Number and Test Report
- Pipe Nipples and Pipe: Use Schedule 40 ASTM A333 carbon steel
- Fittings: Use Schedule 40 ASTM A420 carbon steel
Bolt Hole | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Temp. Range, °F | Material | Each | |
| 1 | 4 1/2" | 1/2" | 5/8" | 4 | 3 1/8" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 000000 |
| 1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 00000 |
| 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 00000 |
| 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 00000 |
| 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 00000 |
| 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 00000 |
| 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 000000 |
| 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 285 psi @ 72° F | 230 psi @ 300° F | -46° to 800° | A350 LF2 Steel | 0000000 | 000000 |