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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 Steel Threaded Pipe Nipples and Pipe
Also known as Schedule 40, this pipe is designed for low-pressure applications. Use in noncorrosive applications.
Welded pipe has a weld bead on the inside. Seamless pipe has a smooth interior for unrestricted flow and is stronger than welded pipe.
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.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Specifications Met: ASTM A733, ANSI/ASME B1.20.1, ASTM A53
- Fittings: Use Class 125 or 150 Iron and Steel
| Pipe Size | Lg. | Construction | Material | Each | |
| 1/8 | 3/4" | Welded | Black-Coated Steel | 000000000 | 00000 |
| 1/4 | 7/8" | Welded | Black-Coated Steel | 000000000 | 0000 |
| 3/8 | 1" | Welded | Black-Coated Steel | 000000000 | 0000 |
| 1/2 | 1 1/8" | Welded | Black-Coated Steel | 000000000 | 0000 |
| 3/4 | 1 3/8" | Welded | Black-Coated Steel | 000000000 | 0000 |
| 1 | 1 1/2" | Welded | Black-Coated Steel | 000000000 | 0000 |
| 1 1/4 | 1 5/8" | Welded | Black-Coated Steel | 000000000 | 0000 |
| 1 1/2 | 1 3/4" | Welded | Black-Coated Steel | 000000000 | 0000 |
| 2 | 2" | Welded | Black-Coated Steel | 000000000 | 0000 |
| 2 1/2 | 2 1/2" | Welded | Black-Coated Steel | 000000000 | 00000 |
| 3 | 2 5/8" | Welded | Black-Coated Steel | 000000000 | 00000 |
| 4 | 2 7/8" | Welded | Black-Coated Steel | 000000000 | 00000 |
| 6 | 3 1/8" | Welded | Black-Coated Steel | 000000000 | 00000 |
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Specifications Met: ASTM A53, ASTM A733, DIN EN 10226
- Fittings: Use Class 125 or 150 Iron and Steel
| Pipe Size | Lg. | Construction | Material | Each | |
| 1/2 | 1 1/8" | Welded | Black-Coated Steel | 00000000 | 00000 |
| 3/4 | 1 3/8" | Welded | Black-Coated Steel | 00000000 | 0000 |
| 1 | 1 1/2" | Welded | Black-Coated Steel | 00000000 | 0000 |
| 1 1/4 | 1 5/8" | Welded | Black-Coated Steel | 00000000 | 00000 |
| 1 1/2 | 1 3/4" | Welded | Black-Coated Steel | 00000000 | 0000 |
| 2 | 2" | Seamless | Black-Coated Steel | 00000000 | 00000 |
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Specifications Met: DIN EN 10226, ANSI/ASME BS21, ANSI/ASME B1.20.1
- Fittings: Use Class 150 Iron and Steel
| Pipe Size | Lg. | Construction | Material | Each | |
| 1/2 | 1 3/16" | Welded | Black-Coated Steel | 00000000 | 000000 |
| 3/4 | 1 11/32" | Welded | Black-Coated Steel | 00000000 | 00000 |
| 1 | 1 31/64" | Welded | Black-Coated Steel | 00000000 | 00000 |
| 1 1/4 | 1 5/8" | Welded | Black-Coated Steel | 00000000 | 00000 |
| 1 1/2 | 1 49/64" | Welded | Black-Coated Steel | 00000000 | 00000 |
| 2 | 1 59/64" | Welded | Black-Coated Steel | 00000000 | 00000 |
Standard-Wall Galvanized Steel
Threaded Pipe Nipples and Pipe
Made of galvanized steel, this Schedule 40 pipe has fair corrosion resistance and is designed for low-pressure applications.
Welded pipe has a weld bead on the inside. Seamless pipe has a smooth interior for unrestricted flow and is stronger than welded pipe.
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.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met: ASTM A733, ANSI/ASME B1.20.1, ASTM A53
- Fittings: Use Class 125 or 150 galvanized iron and galvanized steel
- Flanges: Use Class 150 galvanized steel
| Pipe Size | Lg. | Construction | Each | |
| 1/8 | 3/4" | Welded | 00000000 | 00000 |
| 1/4 | 7/8" | Welded | 00000000 | 0000 |
| 3/8 | 1" | Welded | 00000000 | 0000 |
| 1/2 | 1 1/8" | Welded | 00000000 | 0000 |
| 3/4 | 1 3/8" | Welded | 00000000 | 0000 |
| 1 | 1 1/2" | Welded | 00000000 | 0000 |
| 1 1/4 | 1 5/8" | Welded | 00000000 | 0000 |
| 1 1/2 | 1 3/4" | Welded | 00000000 | 0000 |
| 2 | 2" | Welded | 00000000 | 0000 |
| 2 1/2 | 2 1/2" | Welded | 00000000 | 00000 |
| 3 | 2 5/8" | Welded | 00000000 | 00000 |
| 4 | 2 7/8" | Welded | 00000000 | 00000 |
| 6 | 3 1/8" | Welded | 00000000 | 000000 |
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met: ASTM A53, ASTM A733, DIN EN 10226
- Fittings: Use Class 125 or 150 galvanized iron and galvanized steel
- Flanges: Use Class 150 galvanized steel
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Class: 150
- Specifications Met: ANSI/ASME BS21, ANSI/ASME B1.20.1, DIN EN 10226
- Fittings: Use Class 150 galvanized iron and galvanized steel
- Flanges: Use Class 150 galvanized steel
Thick-Wall Steel Threaded Pipe Nipples and Pipe
Also known as Schedule 80, this pipe has thick walls for good strength in medium-pressure applications.
Welded pipe has a weld bead on the inside. Seamless pipe has a smooth interior for unrestricted flow and is stronger than welded pipe.
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.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met: ASTM A733, ANSI/ASME B1.20.1, ASTM A53
- Fittings: Use Class 300 iron or steel
- Flanges: Use Class 300 or 600 steel
| Pipe Size | Lg. | Thread Type | Material | Each | |
| 1/8 | 3/4" | NPT | Black-Coated Steel | 00000000 | 00000 |
| 1/4 | 7/8" | NPT | Black-Coated Steel | 00000000 | 0000 |
| 3/8 | 1" | NPT | Black-Coated Steel | 00000000 | 0000 |
| 1/2 | 1 1/8" | NPT | Black-Coated Steel | 00000000 | 0000 |
| 3/4 | 1 3/8" | NPT | Black-Coated Steel | 00000000 | 0000 |
| 1 | 1 1/2" | NPT | Black-Coated Steel | 00000000 | 0000 |
| 1 1/4 | 1 5/8" | NPT | Black-Coated Steel | 00000000 | 0000 |
| 1 1/2 | 1 3/4" | NPT | Black-Coated Steel | 00000000 | 0000 |
| 2 | 2" | NPT | Black-Coated Steel | 00000000 | 00000 |
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Specifications Met: ASTM A733, ASTM A106, ANSI/ASME B1.20.1, ASTM A53
- Fittings: Use Class 300 iron or steel
- Flanges: Use Class 300 or 600 steel
| Pipe Size | Lg. | Thread Type | Material | Each | |
| 1/8 | 3/4" | NPT | Black-Coated Steel | 00000000 | 00000 |
| 1/4 | 7/8" | NPT | Black-Coated Steel | 00000000 | 0000 |
| 3/8 | 1" | NPT | Black-Coated Steel | 00000000 | 0000 |
| 1/2 | 1 1/8" | NPT | Black-Coated Steel | 00000000 | 0000 |
| 3/4 | 1 3/8" | NPT | Black-Coated Steel | 00000000 | 0000 |
| 1 | 1 1/2" | NPT | Black-Coated Steel | 00000000 | 0000 |
| 1 1/4 | 1 5/8" | NPT | Black-Coated Steel | 00000000 | 0000 |
| 1 1/2 | 1 3/4" | NPT | Black-Coated Steel | 00000000 | 0000 |
| 2 | 2" | NPT | Black-Coated Steel | 00000000 | 0000 |
| 2 1/2 | 2 1/2" | NPT | Black-Coated Steel | 00000000 | 00000 |
| 3 | 2 5/8" | NPT | Black-Coated Steel | 00000000 | 00000 |
| 4 | 2 7/8" | NPT | Black-Coated Steel | 00000000 | 00000 |
Thick-Wall Galvanized Iron and Steel
Threaded Pipe Nipples and Pipe
Made of galvanized iron or steel, this pipe has fair corrosion resistance. It has thick, Schedule 80 walls for good strength in medium-pressure applications.
Welded pipe has a weld bead on the inside.
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.
- For Use With: Air, Natural Gas, Steam, Water
- Specifications Met: ASTM A733, ASTM A53, ASTM A153, ANSI/ASME B1.20.1
- Fittings: Use Class 300 iron or steel
- Flanges: Use Class 300 steel
| Pipe Size | Lg. | Thread Type | Construction | Material | Each | |
| 1/4 | 7/8" | NPT | Welded | Galvanized Steel | 0000000 | 00000 |
| 3/8 | 1" | NPT | Welded | Galvanized Steel | 0000000 | 0000 |
| 1/2 | 1 1/8" | NPT | Welded | Galvanized Steel | 0000000 | 0000 |
| 3/4 | 1 3/8" | NPT | Welded | Galvanized Steel | 0000000 | 0000 |
| 1 1/4 | 1 5/8" | NPT | Welded | Galvanized Steel | 0000000 | 0000 |
| 1 1/2 | 1 3/4" | NPT | Welded | Galvanized Steel | 0000000 | 0000 |
| 2 | 2" | NPT | Welded | Galvanized Steel | 0000000 | 00000 |
Extra-Thick-Wall Steel Threaded Pipe Nipples and Pipe
Extra-thick walls give this pipe excellent strength to handle high-pressure applications. It is also known as Schedule 160. Pipe is seamless, so it has a smooth interior for unrestricted flow. It is for 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.
- For Use With: Air, Water, Oil, Natural Gas, Steam, Hydraulic Fluid
- Specifications Met: ASTM A733, ASTM A106, ANSI/ASME B1.20.1, ASTM A53
- Fittings: Use Class 3000 steel
- Flanges: Use Class 1500 steel
| Pipe Size | Dash Size | Lg. | Thread Type | Construction | Material | Each | |
| 1/2 | 08 | 1 1/8" | NPT | Seamless | Black-Coated Steel | 00000000 | 00000 |
| 3/4 | 12 | 1 3/8" | NPT | Seamless | Black-Coated Steel | 00000000 | 0000 |
| 1 | 16 | 1 1/2" | NPT | Seamless | Black-Coated Steel | 00000000 | 00000 |
| 1 1/4 | 20 | 1 5/8" | NPT | Seamless | Black-Coated Steel | 00000000 | 00000 |
| 1 1/2 | 24 | 1 3/4" | NPT | Seamless | Black-Coated Steel | 00000000 | 00000 |
| 2 | 32 | 2" | NPT | Seamless | Black-Coated Steel | 00000000 | 00000 |
| 2 1/2 | 40 | 2 1/2" | NPT | Seamless | Black-Coated Steel | 00000000 | 00000 |
| 3 | 48 | 2 5/8" | NPT | Seamless | Black-Coated Steel | 00000000 | 00000 |
| 4 | 64 | 2 7/8" | NPT | Seamless | Black-Coated Steel | 00000000 | 00000 |
Extra-Thick-Wall Galvanized Steel
Threaded Pipe Nipples and Pipe
Also known as Schedule 160, this pipe has extra-thick walls for excellent strength. It has a galvanized finish that provides better corrosion resistance than our plain steel pipe. Pipe is seamless, so it has a smooth interior for unrestricted flow.
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.
- For Use With: Air, Water, Oil, Natural Gas, Steam, Hydraulic Fluid
- Specifications Met: ASTM A733, ANSI/ASME B1.20.1, ASTM A106, ASTM A53
- Fittings: Use Class 3000 steel
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.
- For Use With:
1 1/4 Pipe Size: Air, Hydraulic Fluid, Nitrogen Gas, Oil, Steam, Water
All other sizes: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water - Specifications Met: ASTM A733, ANSI/ASME B1.20.1, ASTM A106
- Fittings: Use Class 6000 steel
- Flanges: Use Class 1500 steel