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Connection Style Connection Style |
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| Flanged |
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| Slip-On Weld |
Maximum Pressure Maximum Pressure |
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Flange OD Flange OD |
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For Use With For Use With |
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Bolt Circle Diameter Bolt Circle Diameter |
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Maximum Steam Pressure Maximum Steam Pressure |
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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.
Slip-on weld flanges have no internal stop; slide a pipe through the flange and weld on both sides.
For technical drawings and 3-D models, click on a part number.
Inch Slip-On Weld Flanges
Front
Raised Surface on Back
- For Use With: Air, Natural Gas, Oil, Steam, Water
- 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 | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Class | Max. Pressure | Max. Steam Pressure | Certification | Specifications Met | Each | |
| 1/2 | 3 1/2" | 1/2" | 5/8" | 4 | 2 3/8" | 150 | 150 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ANSI/ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 000000 |
| 3/4 | 3 7/8" | 1/2" | 5/8" | 4 | 2 3/4" | 150 | 150 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ANSI/ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 150 | 150 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ANSI/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 10K 25A, JIS B2220 | 0000000 | 00000 |
| 1 1/4 | 4 5/8" | 1/2" | 5/8" | 4 | 3 1/2" | 150 | 150 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ANSI/ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 150 | 150 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ANSI/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 10K 40A, JIS B2220 | 0000000 | 00000 |
| 2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 150 | 150 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ANSI/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 | __ | ASTM A105, JIS 10K 50A, JIS B2220 | 0000000 | 00000 |
| 2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 150 | 150 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ANSI/ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 150 | 150 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ANSI/ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 150 | 150 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ANSI/ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 5 | 10" | 3/4" | 7/8" | 8 | 8 1/2" | 150 | 150 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ANSI/ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 150 | 150 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ANSI/ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 00000 |
| 8 | 13 1/2" | 3/4" | 7/8" | 8 | 11 3/4" | 150 | 150 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ANSI/ASME B16.5, ASTM A105, MSS SP-25 | 000000000 | 000000 |
| 10 | 16" | 7/8" | 1" | 12 | 14 1/4" | 150 | 150 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ANSI/ASME B16.5, ASTM A105, MSS SP-25 | 00000000 | 000000 |
| 12 | 19" | 7/8" | 1" | 12 | 17" | 150 | 150 psi @ 72° F | 150 psi @ 300° F | Material Certificate with Traceable Lot Number and Test Report | ANSI/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 |
High-Pressure Steel Unthreaded Pipe Flanges
Forged for extra strength, these heavy duty flanges can withstand high-pressure applications. 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.
Slip-on weld flanges have no internal stop; slide a pipe through the flange and weld on both sides.
For technical drawings and 3-D models, click on a part number.
Slip-On Weld Flanges
Front
Raised Surface on Back
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Class: See table
- Specifications Met: ASTM A105, ANSI/ASME B16.5
- Certification: Material Certificate with Traceable Lot Number and Test Report
- Pipe Nipples and Pipe: Use Schedule 80 steel
- Fittings: Use Class 3000 and Schedule 80 steel
Bolt Hole | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Dash Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Material | Each | |
300 Class | |||||||||||
| 1/2 | 08 | 3 3/4" | 1/2" | 5/8" | 4 | 2 5/8" | 300 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | 00000000 | 000000 |
| 3/4 | 12 | 4 5/8" | 5/8" | 3/4" | 4 | 3 1/4" | 300 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | 00000000 | 00000 |
| 1 | 16 | 4 7/8" | 5/8" | 3/4" | 4 | 3 1/2" | 300 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | 00000000 | 00000 |
| 1 1/4 | 20 | 5 1/4" | 5/8" | 3/4" | 4 | 3 7/8" | 300 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | 00000000 | 00000 |
| 1 1/2 | 24 | 6 1/8" | 3/4" | 7/8" | 4 | 4 1/2" | 300 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | 00000000 | 00000 |
| 2 | 32 | 6 1/2" | 5/8" | 3/4" | 8 | 5" | 300 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | 00000000 | 00000 |
| 2 1/2 | 40 | 7 1/2" | 3/4" | 7/8" | 8 | 5 7/8" | 300 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | 00000000 | 00000 |
| 3 | 48 | 8 1/4" | 3/4" | 7/8" | 8 | 6 5/8" | 300 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | 00000000 | 00000 |
| 4 | 64 | 10" | 3/4" | 7/8" | 8 | 7 7/8" | 300 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | 00000000 | 00000 |
| 5 | __ | 11" | 3/4" | 7/8" | 8 | 9 1/4" | 300 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | 00000000 | 000000 |
| 6 | 96 | 12 1/2" | 3/4" | 7/8" | 12 | 10 5/8" | 300 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | 00000000 | 000000 |
| 8 | __ | 15" | 7/8" | 1" | 12 | 13" | 300 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | 00000000 | 000000 |
| 10 | __ | 17 1/2" | 1.12" | 1.12" | 16 | 15 1/4" | 300 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | 00000000 | 000000 |
| 12 | __ | 20 1/2" | 1 1/4" | 1 1/4" | 16 | 17 3/4" | 300 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | 00000000 | 000000 |
600 Class | |||||||||||
| 1 | 16 | 4.88" | 3/4" | 3/4" | 4 | 3 1/2" | 1,400 psi @ 72° F | 1,300 psi @ 300° F | Black-Coated Steel | 00000000 | 00000 |
| 1 1/2 | 24 | 6.12" | 0.88" | 0.88" | 4 | 4 1/2" | 1,400 psi @ 72° F | 1,300 psi @ 300° F | Black-Coated Steel | 00000000 | 00000 |
| 2 | 32 | 6 1/2" | 3/4" | 3/4" | 8 | 5" | 1,400 psi @ 72° F | 1,300 psi @ 300° F | Black-Coated Steel | 00000000 | 00000 |
| 3 | 48 | 8 1/4" | 0.88" | 0.88" | 8 | 6.62" | 1,400 psi @ 72° F | 1,300 psi @ 300° F | Black-Coated Steel | 00000000 | 00000 |
| 4 | 64 | 10 3/4" | 1" | 1" | 8 | 8 1/2" | 1,400 psi @ 72° F | 1,300 psi @ 300° F | Black-Coated Steel | 00000000 | 000000 |
| 6 | 96 | 14" | 1.12" | 1.12" | 12 | 11 1/2" | 1,400 psi @ 72° F | 1,300 psi @ 300° F | Black-Coated Steel | 00000000 | 000000 |
Extreme-Pressure Steel Unthreaded Pipe Flanges
For excellent strength in extreme-pressure applications, choose these heavy duty Class 1500 flanges. Bolt two same-size flanges together with a gasket (sold separately) to create an access point in a pipe line. They are for noncorrosive environments.
Slip-on weld flanges have no internal stop; slide a pipe through the flange and weld on both sides.
For technical drawings and 3-D models, click on a part number.
Slip-On Weld Flanges
Front
Raised Surface on Back
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Class: 1500
- Specifications Met: See table
- Certification: Material Certificate with Traceable Lot Number and Test Report
- Pipe Nipples and Pipe: Use Schedule XXH steel
- Fittings: Use Class 6000 steel
Bolt Hole | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Dash Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Specifications Met | Each | |
| 1/2 | 08 | 4 3/4" | 3/4" | 7/8" | 4 | 3 1/4" | 3,700 psi @ 72° F | 3,200 psi @ 300° F | ANSI/ASME B16.5, ASTM A105, MSS SP-25, MSS SP-6 | 0000000 | 0000000 |
| 3/4 | 12 | 5 1/8" | 3/4" | 7/8" | 4 | 3 1/2" | 3,700 psi @ 72° F | 3,200 psi @ 300° F | ANSI/ASME B16.5, ASTM A105, MSS SP-25, MSS SP-6 | 0000000 | 000000 |
| 1 | 16 | 5 7/8" | 7/8" | 1" | 4 | 4" | 3,700 psi @ 72° F | 3,200 psi @ 300° F | ANSI/ASME B16.5, ASTM A105, MSS SP-25, MSS SP-6 | 0000000 | 000000 |
| 1 1/4 | 20 | 6 1/4" | 7/8" | 1" | 4 | 4 3/8" | 3,700 psi @ 72° F | 3,200 psi @ 300° F | ANSI/ASME B16.5, ASTM A105, MSS SP-25, MSS SP-6 | 0000000 | 000000 |
| 1 1/2 | 24 | 7" | 1" | 1 1/8" | 4 | 4 7/8" | 3,700 psi @ 72° F | 3,200 psi @ 300° F | ANSI/ASME B16.5, ASTM A105, MSS SP-25, MSS SP-6 | 0000000 | 000000 |
| 2 | 32 | 8 1/2" | 7/8" | 1" | 8 | 6 1/2" | 3,700 psi @ 72° F | 3,200 psi @ 300° F | ANSI/ASME B16.5, ASTM A105, MSS SP-25, MSS SP-6 | 0000000 | 000000 |
| 3 | 48 | 10 1/2" | 1 1/4" | 1 1/4" | 8 | 8" | Not Rated | Not Rated | ASTM A105 | 0000000 | 000000 |
| 4 | 64 | 12 1/4" | 1.38" | 1.38" | 8 | 9 1/2" | Not Rated | Not Rated | ASTM A105 | 0000000 | 000000 |