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.
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.
- 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 |
Low-Pressure Press-Connect Steel Unthreaded Pipe Fittings
- For Use On:
EPDM Rubber O-Ring: Ethylene Glycol, Propylene Glycol, Water
Buna-N Rubber O-Ring: Air, Lubricants, Propane, Fuel Oil, Natural Gas, Diesel Fuel - Specifications Met:
EPDM Rubber O-Ring: ASME B31,1, ASME B31.3, ASME B31.9, FM 1920, UL 213
Buna-N Rubber O-Ring: ASME B31.1, ASME B31.3, ASME B31.9, ANSI LC4/CSA 6.32, International Fuel Gas Code - Maximum Pressure:
EPDM Rubber O-Ring: 200 psi @ 72° F
Buna-N Rubber O-Ring: 125 psi @ 72° F - Pipe Nipples and Pipe: Use Schedule 40 Steel
- Flanges: Use Class 150 Steel
Crimp these fittings onto steel pipe to form a tightly sealed connection that’s faster than threading or welding and doesn’t require heat. An internal gripping ring and rubber O-ring create a secure seal when crimped. They are designed to leak if fittings have not been crimped; a colored dot marks the leak path so it's easy to spot unsealed connections. These steel fittings are coated in zinc-nickel to resist corrosion, but will rust if frequently exposed to saltwater or harsh chemicals. They are comparable to Viega MegaPress steel fittings.
Fittings meet ANSI/ASME B31 code requirements for use in pressure piping systems.
Buna-N rubber O-rings hold up to natural gas, propane, diesel fuel, lubricants, and other oils. Fittings with these O-rings are often used in fuel gas systems and air lines. They meet the ANSI LC4/CSA 6.32 standard for fuel gas systems and comply with the International Fuel Gas Code.
Bolt two same-size flanges together with a gasket (sold separately) to create a removable connection to valves, pumps and other equipment.
For technical drawings and 3-D models, click on a part number.
Bolt Hole | Buna-N Rubber O-Ring | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Socket Dp. | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Pressure Class | Lg. | Each | |
| 1/2 | 0.188" | 3 1/2" | 1/2" | 5/8" | 4 | 2 3/8" | 150 | 2 7/16" | 00000000 | 000000 |
| 3/4 | 0.188" | 4" | 1/2" | 5/8" | 4 | 2 3/4" | 150 | 2 19/32" | 00000000 | 00000 |
| 1 | 0.188" | 4 3/8" | 1/2" | 5/8" | 4 | 3 1/8" | 150 | 2 61/64" | 0000000 | 000000 |
| 1 1/4 | 0.375" | 4 1/2" | 1/2" | 5/8" | 4 | 3 1/2" | 150 | 3 9/16" | 00000000 | 000000 |
| 1 1/2 | 0.375" | 4 7/8" | 1/2" | 5/8" | 4 | 3 7/8" | 150 | 3 51/64" | 00000000 | 000000 |
| 2 | 0.375" | 5 7/8" | 5/8" | 3/4" | 4 | 4 3/4" | 150 | 3 29/32" | 00000000 | 000000 |
Crimping tools seal fittings in less than five seconds. These tools are cordless, so you can take them to any job. Connect the jaw or ring that matches your pipe size to these tools, then pull the trigger to crimp the fitting. The pivoting head lets you access connections from any angle.
Battery | |||||||
|---|---|---|---|---|---|---|---|
| Voltage | No. Included | Cap., amp-hrs. | Battery Charger Included | Battery Charging Time, min. | Compatible With | Each | |
| 18V DC | 2 | 3 | Yes | 39 | Viega MegaPress Viega ProPress Viega ProPress XL-C | 00000000 | 000000000 |
Jaw and ring sets include three jaws, three rings, and one ring actuator jaw. Jaws are for pipe sizes 1/2 to 1; they fit directly into the crimping tool. Rings are for pipe sizes 1 1/4 to 2; clip the ring around the fitting and use the ring actuator jaw and crimping tool to press the open ends together.
For Pipe | ||||||||
|---|---|---|---|---|---|---|---|---|
| Size | Material | For Manufacturer | For Manufacturer Model No. | Compatible With | Includes | Container Type | Each | |
| 1/2, 3/4, 1, 1 1/4, 1 1/2, 2 | Stainless Steel, Steel | Ridgid | RP 340 | Viega MegaPress | One Ring Actuator Jaw Three Jaws (1/2-1 Pipe Size) Three Rings (1 1/4-2 Pipe Size) | Carrying Case | 00000000 | 000000000 |
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.
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.
- For Use With: Air, Hydraulic Fluid, 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 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 | Specifications Met | Each | |
Pressure Class 300 | ||||||||||||
| 1/2 | 08 | 3 3/4" | 1/2" | 5/8" | 4 | 2 5/8" | 600 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | ASME B16.5, ASTM A105 | 00000000 | 000000 |
| 3/4 | 12 | 4 5/8" | 5/8" | 3/4" | 4 | 3 1/4" | 600 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | ASME B16.5, ASTM A105 | 00000000 | 00000 |
| 1 | 16 | 4 7/8" | 5/8" | 3/4" | 4 | 3 1/2" | 600 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | ASME B16.5, ASTM A105 | 00000000 | 00000 |
| 1 1/4 | 20 | 5 1/4" | 5/8" | 3/4" | 4 | 3 7/8" | 600 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | ASME B16.5, ASTM A105 | 00000000 | 00000 |
| 1 1/2 | 24 | 6 1/8" | 3/4" | 7/8" | 4 | 4 1/2" | 600 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | ASME B16.5, ASTM A105 | 00000000 | 00000 |
| 2 | 32 | 6 1/2" | 5/8" | 3/4" | 8 | 5" | 600 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | ASME B16.5, ASTM A105 | 00000000 | 00000 |
| 2 1/2 | 40 | 7 1/2" | 3/4" | 7/8" | 8 | 5 7/8" | 600 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | ASME B16.5, ASTM A105 | 00000000 | 00000 |
| 3 | 48 | 8 1/4" | 3/4" | 7/8" | 8 | 6 5/8" | 600 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | ASME B16.5, ASTM A105 | 00000000 | 00000 |
| 4 | 64 | 10" | 3/4" | 7/8" | 8 | 7 7/8" | 600 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | ASME B16.5, ASTM A105 | 00000000 | 000000 |
| 5 | __ | 11" | 3/4" | 7/8" | 8 | 9 1/4" | 600 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | ASME B16.5, ASTM A105 | 00000000 | 000000 |
| 6 | 96 | 12 1/2" | 3/4" | 7/8" | 12 | 10 5/8" | 600 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | ASME B16.5, ASTM A105 | 00000000 | 000000 |
| 8 | __ | 15" | 7/8" | 1" | 12 | 13" | 600 psi @ 72° F | 300 psi @ 300° F | Black-Coated Steel | ASME B16.5, ASTM A105 | 00000000 | 000000 |
Pressure Class 600 | ||||||||||||
| 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 | ASME B16.5, ASTM A105 | 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 | ASME B16.5, ASTM A105 | 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 | ASME B16.5, ASTM A105 | 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 | ASME B16.5, ASTM A105 | 00000000 | 000000 |
| 4 | 64 | 10 3/4" | 1" | 1" | 8 | 8 1/2" | Not Rated | Not Rated | Black-Coated Steel | ASTM A105 | 00000000 | 000000 |
High-Pressure Steel Unthreaded SAE Pipe Flanges
Create an access point in a high-pressure hydraulic fluid line with these flanges. They are also known as Code 61 SAE hydraulic flanges. To connect, bolt a flange with an O-ring groove surface to a flange with a flat surface of the same size. Flanges are for use in noncorrosive environments.
Socket-connect flanges weld to pipe for a strong, permanent connection.
For technical drawings and 3-D models, click on a part number.
- For Use With: Hydraulic Fluid
- Specifications Met: SAE J518, ISO 6162
Flange | Bolt Hole | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | SAE Flange Size | Dash Size | Max. Pressure | Ht. | Wd. | Dp. | Mounting Hardware Included | For Bolt Dia. | Dia. | No. of | Ctr.-to-Ctr. | Each | |
Inch | |||||||||||||
| 3/4 | 3/4 | 12 | 3,000 psi @ 72° F | 2 5/8" | 1 3/4" | 1" | Yes | 3/8" | 0.41" | 4 | 7/8", 1 7/8" | 0000000 | 000000 |
| 1 | 1 | 16 | 3,000 psi @ 72° F | 2 53/64" | 2" | 1" | Yes | 3/8" | 0.41" | 4 | 1.031", 2.062" | 0000000 | 00000 |
| 1 1/2 | 1 1/2 | 24 | 3,000 psi @ 72° F | 3 3/4" | 2 3/4" | 1 1/4" | Yes | 0.438" | 0.47" | 4 | 1.406", 2 3/4" | 000000 | 00000 |
| 2 | 2 | 32 | 3,000 psi @ 72° F | 4" | 3 1/4" | 1 1/2" | Yes | 1/2" | 0.53" | 4 | 1.688", 3.062" | 0000000 | 00000 |
Metric | |||||||||||||
| 1 1/2 | 1 1/2 | 24 | 3,000 psi @ 72° F | 95mm | 70mm | 32mm | Yes | 12mm | 13mm | 4 | 36mm, 70mm | 0000000 | 00000 |
| 2 | 2 | 32 | 3,000 psi @ 72° F | 102mm | 83mm | 38mm | Yes | 12mm | 13mm | 4 | 43mm, 78mm | 0000000 | 00000 |
- For Use With: Hydraulic Fluid
- Specifications Met: SAE J518, ISO 6162
Flange | Bolt Hole | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | SAE Flange Size | Dash Size | Max. Pressure | Ht. | Wd. | Dp. | Mounting Hardware Included | For Bolt Dia. | Dia. | No. of | Ctr.-to-Ctr. | Each | |
| 3/4 | 3/4 | 12 | 3,000 psi @ 72° F | 2 5/8" | 1 3/4" | 1" | No | 3/8" | 0.41" | 4 | 7/8", 1 7/8" | 0000000 | 000000 |
| 1 | 1 | 16 | 3,000 psi @ 72° F | 2 53/64" | 2" | 1" | No | 3/8" | 0.41" | 4 | 1.031", 2.062" | 0000000 | 00000 |
| 1 1/2 | 1 1/2 | 24 | 3,000 psi @ 72° F | 3 3/4" | 2 3/4" | 1 1/4" | No | 0.438" | 0.47" | 4 | 1.406", 2 3/4" | 0000000 | 00000 |
| 2 | 2 | 32 | 3,000 psi @ 72° F | 4" | 3 1/4" | 1 1/2" | No | 1/2" | 0.53" | 4 | 1.688", 3.062" | 0000000 | 00000 |
Extreme-Pressure Steel Unthreaded Pipe Flanges
For excellent strength in extreme-pressure applications, choose these heavy duty Pressure 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.
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.
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Pressure Class : 1500
- Specifications Met:
3 and 4 Pipe Sizes: ASTM A105
All other sizes: ASME B16.5, ASTM A105, MSS SP-25, MSS SP-6 - Certification: Material Certificate with Traceable Lot Number and Test Report
- 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 | For Pipe Schedule | Each | |
| 3/4 | 12 | 5 1/8" | 3/4" | 7/8" | 4 | 3 1/2" | 3,700 psi @ 72° F | 3,200 psi @ 300° F | 80 | 0000000 | 0000000 |
| 1 | 16 | 5 7/8" | 7/8" | 1" | 4 | 4" | 3,700 psi @ 72° F | 3,200 psi @ 300° F | 80 | 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 | 80 | 0000000 | 000000 |
| 2 | 32 | 8 1/2" | 7/8" | 1" | 8 | 6 1/2" | 3,700 psi @ 72° F | 3,200 psi @ 300° F | 80 | 0000000 | 000000 |