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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Super-Thick-Wall Steel Threaded Pipe Nipples and Pipe
Also known as Schedule XXH, this heavy duty pipe has the thickest, strongest walls of all the threaded pipe we offer. Pipe is seamless, so it has a smooth interior for unrestricted flow. Use in noncorrosive environments.
Fully threaded pipe is also known as a close nipple; it is threaded on each end to the center.
For technical drawings and 3-D models, click on a part number.
Fully Threaded
- For Use With: See table
- Specifications Met: ASTM A733, ASME B1.20.1, ASTM A106
- Fittings: Use Class 6000 steel
- Flanges: Use Class 1500 steel
| Pipe Size  | Dash Size | Lg. | Thread Type | Construction | Material | For Use With | Each | |
| 1/2 | 08 | 1 1/8" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 000000 |
| 3/4 | 12 | 1 3/8" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 1 | 16 | 1 1/2" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 1 1/4 | 20 | 1 5/8" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Nitrogen Gas, Oil, Steam, Water | 0000000 | 00000 |
| 1 1/2 | 24 | 1 3/4" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 2 | 32 | 2" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
Threaded on Both Ends
- For Use With: See table
- Specifications Met: ASTM A733, ASME B1.20.1, ASTM A106
- Fittings: Use Class 6000 steel
- Flanges: Use Class 1500 steel
| Lg. | Thread Type | Construction | Material | For Use With | Each | |
1/2 Pipe Size—08 Dash Size | ||||||
|---|---|---|---|---|---|---|
| 1 1/2" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 000000 |
| 2" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 3" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 4" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 5" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Nitrogen Gas, Oil, Steam, Water | 0000000 | 00000 |
| 6" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 12" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 18" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 24" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 36" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 000000 |
3/4 Pipe Size—12 Dash Size | ||||||
| 1 1/2" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 2" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 3" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 4" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 5" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Nitrogen Gas, Oil, Steam, Water | 0000000 | 00000 |
| 6" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 12" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 18" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 24" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 000000 |
| 36" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 000000 |
1 Pipe Size—16 Dash Size | ||||||
| 2" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 3" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 4" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 5" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Nitrogen Gas, Oil, Steam, Water | 0000000 | 00000 |
| 6" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 12" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 000000 |
| 18" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 000000 |
| 24" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 000000 |
| 36" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 000000 |
1 1/4 Pipe Size—20 Dash Size | ||||||
| 2" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Nitrogen Gas, Oil, Steam, Water | 0000000 | 00000 |
| 3" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Nitrogen Gas, Oil, Steam, Water | 0000000 | 00000 |
| 4" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Nitrogen Gas, Oil, Steam, Water | 0000000 | 00000 |
| 5" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Nitrogen Gas, Oil, Steam, Water | 0000000 | 00000 |
| 6" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Nitrogen Gas, Oil, Steam, Water | 0000000 | 00000 |
1 1/2 Pipe Size—24 Dash Size | ||||||
| 2" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 3" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 4" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 5" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Nitrogen Gas, Oil, Steam, Water | 0000000 | 00000 |
| 6" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 12" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 000000 |
| 18" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 000000 |
| 24" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 000000 |
| 36" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 000000 |
2 Pipe Size—32 Dash Size | ||||||
| 3" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 4" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 5" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Nitrogen Gas, Oil, Steam, Water | 0000000 | 00000 |
| 6" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 12" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 000000 |
| 18" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 000000 |
| 24" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 000000 |
| 36" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 000000 |
Threaded on One End
- For Use With: See table
- Specifications Met: ASTM A733, ASME B1.20.1, ASTM A106
- Fittings: Use Class 6000 steel
- Flanges: Use Class 1500 steel
| Lg. | Thread Type | Construction | Material | For Use With | Each | |
1/2 Pipe Size—08 Dash Size | ||||||
|---|---|---|---|---|---|---|
| 1 1/2" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 000000 |
| 2" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 3" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 4" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 6" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
3/4 Pipe Size—12 Dash Size | ||||||
| 1 1/2" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 2" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 3" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 4" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 6" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
1 Pipe Size—16 Dash Size | ||||||
| 2" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 3" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 4" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 5" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Nitrogen Gas, Oil, Steam, Water | 0000000 | 00000 |
| 6" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
1 1/4 Pipe Size—20 Dash Size | ||||||
| 2" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Nitrogen Gas, Oil, Steam, Water | 0000000 | 00000 |
| 3" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Nitrogen Gas, Oil, Steam, Water | 0000000 | 00000 |
| 4" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Nitrogen Gas, Oil, Steam, Water | 0000000 | 00000 |
| 5" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Nitrogen Gas, Oil, Steam, Water | 0000000 | 00000 |
| 6" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Nitrogen Gas, Oil, Steam, Water | 0000000 | 00000 |
1 1/2 Pipe Size—24 Dash Size | ||||||
| 2" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 3" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 4" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 6" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
2 Pipe Size—32 Dash Size | ||||||
| 3" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 4" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
| 6" | NPT | Seamless | Steel | Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water | 0000000 | 00000 |
Super-Thick-Wall Steel Unthreaded Pipe
- For Use With: Air, Water, Oil, Natural Gas, Steam, Hydraulic Fluid
- Specifications Met: ASTM A106, ASTM A733
- Fittings: Use Class 6000 steel
- Flanges: Use Class 1500 steel
With super-thick Schedule XXH walls, this pipe provides the strongest connections of all the unthreaded pipe we offer. Weld it to fittings and additional lengths of pipe. Welded connections are stronger than threaded connections and less likely to leak. Pipe is seamless, so it has a smooth interior for unrestricted flow. It is for use in noncorrosive environments.
For technical drawings and 3-D models, click on a part number.
| Lg., ft. | Wall Thick. | Construction | Each | |
1/2 Pipe Size—08 Dash Size | ||||
|---|---|---|---|---|
| 1 | 0.294" | Seamless | 0000000 | 000000 |
| 2 | 0.294" | Seamless | 0000000 | 00000 |
| 3 | 0.294" | Seamless | 0000000 | 000000 |
3/4 Pipe Size—12 Dash Size | ||||
| 1 | 0.308" | Seamless | 0000000 | 00000 |
| 2 | 0.308" | Seamless | 0000000 | 000000 |
| 3 | 0.308" | Seamless | 0000000 | 000000 |
1 Pipe Size—16 Dash Size | ||||
| 1 | 0.358" | Seamless | 0000000 | 000000 |
| 2 | 0.358" | Seamless | 0000000 | 000000 |
| 3 | 0.358" | Seamless | 0000000 | 000000 |
1 1/2 Pipe Size—24 Dash Size | ||||
| 1 | 0.4" | Seamless | 0000000 | 000000 |
| 2 | 0.4" | Seamless | 0000000 | 000000 |
| 3 | 0.4" | Seamless | 0000000 | 000000 |
2 Pipe Size—32 Dash Size | ||||
| 1 | 0.436" | Seamless | 0000000 | 000000 |
| 2 | 0.436" | Seamless | 0000000 | 000000 |
| 3 | 0.436" | Seamless | 0000000 | 000000 |