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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Extreme-Pressure Steel Threaded Pipe Fittings
The strongest steel fittings we offer, these can withstand extreme-pressure applications.
Plugs with a round body or a hex body are solid and have a tall head. They’re also known as refinery plugs.
Note: The maximum pressure listed for Class 6000 fittings is for conditions where there are no sudden changes in pressure or velocity. Please refer to ASME B16.11 to determine the specific maximum operating pressure for your application.
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: 6000
- Specifications Met: ASME B1.20.1, ASME B16.11, ASTM A105
- Pipe Nipples and Pipe: Use XXH steel
- Flanges: Use Class 1500 steel
Pipe Size | Dash Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Female | ||||||
|---|---|---|---|---|---|---|
| 1/4 | 04 | 6,000 psi @ 72° F | 300 psi @ 360° F | Steel | 00000000 | 000000 |
| 3/8 | 06 | 6,000 psi @ 72° F | 300 psi @ 360° F | Steel | 00000000 | 00000 |
| 1/2 | 08 | 6,000 psi @ 72° F | 300 psi @ 360° F | Steel | 00000000 | 00000 |
| 3/4 | 12 | 6,000 psi @ 72° F | 300 psi @ 360° F | Steel | 00000000 | 00000 |
| 1 | 16 | 6,000 psi @ 72° F | 300 psi @ 360° F | Steel | 00000000 | 00000 |
| 1 1/4 | 20 | 6,000 psi @ 72° F | 300 psi @ 360° F | Steel | 000000000 | 00000 |
| 1 1/2 | 24 | 6,000 psi @ 72° F | 300 psi @ 360° F | Steel | 00000000 | 00000 |
| 2 | 32 | 6,000 psi @ 72° F | 300 psi @ 360° F | Steel | 00000000 | 00000 |
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Pressure Class: 6000
- Specifications Met: ASME B1.20.1, ASME B16.11, ASTM A105
- Pipe Nipples and Pipe: Use Schedule XXH steel
- Flanges: Use steel
| Pipe Size | Max. Pressure | Material | Each | |
NPT Male | ||||
|---|---|---|---|---|
| 1/4 | 6,000 psi @ 72° F | Steel | 0000000 | 000000 |
| 3/8 | 6,000 psi @ 72° F | Steel | 0000000 | 00000 |
| 1/2 | 6,000 psi @ 72° F | Steel | 0000000 | 00000 |
| 3/4 | 6,000 psi @ 72° F | Steel | 0000000 | 00000 |
| 1 | 6,000 psi @ 72° F | Steel | 0000000 | 00000 |
| 1 1/4 | 6,000 psi @ 72° F | Steel | 0000000 | 00000 |
| 1 1/2 | 6,000 psi @ 72° F | Steel | 0000000 | 00000 |
| 2 | 6,000 psi @ 72° F | Steel | 0000000 | 00000 |
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Pressure Class: 6000
- Specifications Met: ASME B1.20.1, ASME B16.11, ASTM A105
- Pipe Nipples and Pipe: Use Schedule XXH steel
- Flanges: Use steel
| Pipe Size | Drive Size | Max. Pressure | Material | Each | |
NPT Male | |||||
|---|---|---|---|---|---|
| 1/4 | 5/8" | 6,000 psi @ 72° F | Steel | 0000000 | 000000 |
| 3/8 | 7/8" | 6,000 psi @ 72° F | Steel | 0000000 | 00000 |
| 1/2 | 7/8" | 6,000 psi @ 72° F | Steel | 0000000 | 00000 |
| 3/4 | 1 1/16" | 6,000 psi @ 72° F | Steel | 0000000 | 00000 |
| 1 | 1 3/8" | 6,000 psi @ 72° F | Steel | 0000000 | 00000 |
| 1 1/4 | 1 3/4" | 6,000 psi @ 72° F | Steel | 0000000 | 00000 |
| 1 1/2 | 2" | 6,000 psi @ 72° F | Steel | 0000000 | 00000 |
| 2 | 2 1/2" | 6,000 psi @ 72° F | Steel | 0000000 | 000000 |
Extreme-Pressure Socket-Connect Steel Unthreaded Pipe Fittings
Also known as Pressure Class 6000 fittings, these heavy duty forged fittings are the strongest steel fittings we offer. They are easier to weld than butt-weld fittings because the fitting doesn’t need to align perfectly to the pipe. Slide pipe into the socket and weld for a strong, permanent connection. Fittings are for use in noncorrosive environments.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Water, Oil, Natural Gas, Steam, Hydraulic Fluid
- Pressure Class : 6000
- Specifications Met: ASME B16.11, ASTM A105
- Pipe Nipples and Pipe: Use Schedule XXH steel
- Flanges: Use Class 1500 steel
| Pipe Size | Dash Size | Max. Pressure | Max. Steam Pressure | Each | |
| 1/2 | 08 | 6,000 psi @ 72° F | 300 psi @ 360° F | 000000000 | 000000 |
| 3/4 | 12 | 6,000 psi @ 72° F | 300 psi @ 360° F | 000000000 | 00000 |
| 1 | 16 | 6,000 psi @ 72° F | 300 psi @ 360° F | 000000000 | 00000 |
| 1 1/4 | 20 | 6,000 psi @ 72° F | 300 psi @ 360° F | 000000000 | 00000 |
| 1 1/2 | 24 | 6,000 psi @ 72° F | 300 psi @ 360° F | 000000000 | 00000 |
| 2 | 32 | 6,000 psi @ 72° F | 300 psi @ 360° F | 000000000 | 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.
Cap flanges are also known as blind flanges.
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: MSS SP-6, MSS SP-25, ASTM A105, ASME B16.5
- 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 | |
| 1/2 | 08 | 4 3/4" | 3/4" | 7/8" | 4 | 3 1/4" | 3,700 psi @ 72° F | 3,200 psi @ 300° F | Any | 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 | Any | 0000000 | 000000 |
| 1 | 16 | 5 7/8" | 7/8" | 1" | 4 | 4" | 3,700 psi @ 72° F | 3,200 psi @ 300° F | Any | 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 | Any | 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 | Any | 0000000 | 000000 |
| 2 | 32 | 8 1/2" | 7/8" | 1" | 8 | 6 1/2" | 3,700 psi @ 72° F | 3,200 psi @ 300° F | Any | 0000000 | 000000 |
| 3 | 48 | 10 1/2" | 1 1/4" | 1 1/4" | 8 | 8" | 3,700 psi @ 72° F | 3,200 psi @ 300° F | Any | 0000000 | 000000 |
| 4 | 64 | 12 1/4" | 1.38" | 1.38" | 8 | 9 1/2" | 3,700 psi @ 72° F | 3,200 psi @ 300° F | Any | 0000000 | 000000 |
Extreme-Pressure Socket-Connect Stainless Steel Unthreaded Pipe Fittings
The strongest socket-connect fittings we offer, these heavy duty forged fittings are also known as Pressure Class 6000. They are easier to weld than butt-weld fittings because the fitting doesn’t need to align perfectly to the pipe. Slide pipe into the socket and weld for a strong, permanent connection.
304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Water, Steam
- Pressure Class : 6000
- Specifications Met: ASME B16.11, ASTM A182, ASME B1.20.1
- Pipe: Use Schedule 160 stainless steel
| Pipe Size | Max. Pressure | Max. Steam Pressure | Each | |
304/304L Stainless Steel | ||||
|---|---|---|---|---|
| 1/2 | 7,700 psi @ 72° F | 6,500 psi @ 220° F | 0000000 | 000000 |
| 3/4 | 7,100 psi @ 72° F | 5,900 psi @ 220° F | 0000000 | 00000 |
| 1 | 6,400 psi @ 72° F | 5,300 psi @ 220° F | 0000000 | 00000 |
| 2 | 4,700 psi @ 72° F | 3,900 psi @ 220° F | 0000000 | 000000 |
316/316L Stainless Steel | ||||
| 3/4 | 7,100 psi @ 72° F | 5,900 psi @ 220° F | 0000000 | 00000 |
| 1 | 6,400 psi @ 72° F | 5,300 psi @ 220° F | 0000000 | 00000 |