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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High-Pressure Iron and Steel Threaded Pipe Fittings
These fittings can stand up to high-pressure applications. Use them in noncorrosive environments.
Union connectors separate into three pieces so you can access your line without unthreading pipe connections.
Phosphate-coated and zinc-phosphate-coated fittings offer some corrosion resistance, but aren't intended for corrosive environments.
Note: The maximum pressure listed for Class 3000 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: 3000
- Specifications Met: MSS SP-83, ASME B1.20.1, ASTM A105
- Pipe Nipples and Pipe: Use Schedule 160 steel
- Flanges: Use Class 1500 steel
Pipe Size | Dash Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Female | ||||||
|---|---|---|---|---|---|---|
| 1/2 | 08 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 000000 |
| 3/4 | 12 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 1 | 16 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 000000 |
| 1 1/4 | 20 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 000000 |
| 1 1/2 | 24 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 000000 |
| 2 | 32 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 000000 |
| 2 1/2 | 40 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 000000 |
| 3 | 48 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 000000 |
| 4 | 64 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 000000 |
Hose Unions for Chemicals and Petroleum
- For Use With: Citric Acid, Cutting Oil, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Mineral Oil, Oil
- Maximum Pressure: See table
Access your line without twisting the hose—these unions separate into three pieces. Also known as WECO couplings and hammer unions, they’re made of forged steel that’s tough enough to be tightened with the blow of a hammer. Use them with other connectors that have the same hammer union figure and pipe size.
Note: Pressure ratings are given for static (constant) pressure conditions with no instantaneous increases in pressure.
For technical drawings and 3-D models, click on a part number.
| Pipe Size | Dash Size | Gasket Material | Hammer Union Figure | Max. Pressure | Each | |
Steel | ||||||
|---|---|---|---|---|---|---|
NPT Female | ||||||
| 1 | 16 | __ | 200 | 2,000 psi @ 72° F | 0000000 | 000000 |
| 1 | 16 | Buna-N Rubber | 206 | 2,000 psi @ 72° F | 0000000 | 00000 |
| 1 1/2 | 24 | __ | 200 | 2,000 psi @ 72° F | 0000000 | 00000 |
| 2 | 32 | __ | 100 | 1,000 psi @ 72° F | 0000000 | 00000 |
| 2 | 32 | __ | 200 | 2,000 psi @ 72° F | 0000000 | 00000 |
| 2 | 32 | Buna-N Rubber | 206 | 2,000 psi @ 72° F | 0000000 | 00000 |
| 4 | 64 | Buna-N Rubber | 206 | 2,000 psi @ 72° F | 0000000 | 000000 |
| 6 | 96 | Buna-N Rubber | 206 | 2,000 psi @ 72° F | 0000000 | 000000 |
| 8 | __ | Buna-N Rubber | 206 | 2,000 psi @ 72° F | 0000000 | 000000 |