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 Iron and Steel Threaded Pipe Fittings
Use these fittings for low-pressure applications in noncorrosive environments.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class: See table
- Pipe Nipples and Pipe: Use Schedule 40 steel
Pipe Size | ||||||||
|---|---|---|---|---|---|---|---|---|
(A) | (B) | Pressure Class | Max. Pressure | Max. Steam Pressure | Material | Specifications Met | Each | |
NPT Male × NPT Female | ||||||||
| 6 | 5 | 125 | 175 psi @ 72° F | 125 psi @ 350° F | Black-Coated Iron | ASME B16.14 | 000000000 | 0000000 |
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.
Reducing flanges allow you to transition your system to a smaller pipe size; attach to a flange with a larger pipe size but with the same flange dimensions.
For technical drawings and 3-D models, click on a part number.
- For Use With:
1/4 Pipe Size: Air, Natural Gas, Oil, Water
All other sizes: Air, Natural Gas, Oil, Steam, Water - Specifications Met:
1/4 Pipe Size: ASTM A105
All other sizes: ASME B16.5, ASTM A105, MSS SP-25, MSS SP-6 - Fittings: Use Class 125 or 150 iron and steel
- Pipe Nipples and Pipe: 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 | Material | Each | |
NPT | |||||||||||
| 5 | 6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 285 psi @ 72° F | 230 psi @ 300° F | Steel | 0000000 | 0000000 |
Low-Pressure Clamp-On Connectors for Drain, Waste, and Vent
Tighten the bands on these connectors to form a strong seal on pipe or fittings.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Water
- Temperature Range: -40° to 120° F
- Specifications Met: ASTM C1173, ASTM D5926, CSA Certified
- For Pipe Material: Stainless Steel, Iron, Steel, Aluminum, PVC Plastic, CPVC Plastic
For Pipe Size | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| (A) | (B) | Lg. | Max. Pressure | Max. Vacuum | Material | Clamp Material | Flexibility | Each | |
Pipe End × Pipe End | |||||||||
| 5 | 3 | 3 7/8" | 4 psi @ 72° F | Not Rated | PVC Plastic | 300 Series Stainless Steel | Flexible | 0000000 | 000000 |
| 5 | 4 | 4" | 4 psi @ 72° F | Not Rated | PVC Plastic | 300 Series Stainless Steel | Flexible | 0000000 | 00000 |
| 6 | 5 | 5 3/4" | 4 psi @ 72° F | Not Rated | PVC Plastic | 300 Series Stainless Steel | Flexible | 0000000 | 00000 |