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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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Standard-Wall Butt-Weld Steel
Unthreaded Pipe Fittings
Butt-weld fittings allow for a smooth connection that provides maximum flow. They have beveled ends that, when flush to pipe, create a trough for a strong, permanent weld. Fittings are also known as Schedule 40. They are for use in noncorrosive environments.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Specifications Met: ASTM A234, ANSI/ASME B16.9
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Flanges: Use Class 150 steel
| Pipe Size | Wall Thick. | Construction | Each | |
| 1/2 | 0.109" | Welded | 000000000 | 000000 |
| 3/4 | 0.113" | Welded | 000000000 | 00000 |
| 1 | 0.133" | Welded | 000000000 | 00000 |
| 1 1/4 | 0.14" | Welded | 000000000 | 00000 |
| 1 1/2 | 0.145" | Welded | 000000000 | 00000 |
| 2 | 0.154" | Welded | 000000000 | 00000 |
| 2 1/2 | 0.203" | Welded | 000000000 | 00000 |
| 3 | 0.216" | Welded | 000000000 | 00000 |
| 4 | 0.237" | Welded | 000000000 | 00000 |
| 6 | 0.28" | Welded | 000000000 | 00000 |
| 8 | 0.322" | Welded | 000000000 | 00000 |
Thick-Wall Butt-Weld Steel Unthreaded Pipe Fittings
With thick walls, these fittings are the strongest steel butt-weld fittings we offer. Weld them flush against pipe to provide a smooth connection for maximum flow. Fittings have beveled ends that create a trough for a leak-resistant, permanent weld. Use in noncorrosive environments.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Specifications Met: ASTM A234
- Pipe Nipples and Pipe: Use Schedule 80 steel
- Flanges: Use Class 300 steel
| Pipe Size | Wall Thick. | Construction | Each | |
| 1/2 | 0.147" | Seamless | 0000000 | 000000 |
| 3/4 | 0.154" | Seamless | 0000000 | 00000 |
| 1 | 0.179" | Seamless | 0000000 | 00000 |
| 1 1/4 | 0.191" | Seamless | 0000000 | 00000 |
| 1 1/2 | 0.2" | Seamless | 0000000 | 00000 |
| 2 | 0.218" | Seamless | 0000000 | 00000 |
| 2 1/2 | 0.276" | Seamless | 0000000 | 00000 |
| 3 | 0.3" | Seamless | 0000000 | 00000 |
| 4 | 0.337" | Seamless | 0000000 | 00000 |
| 6 | 0.432" | Seamless | 0000000 | 00000 |