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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 Stainless Steel
Threaded Pipe Nipples and Pipe
Designed for low-pressure flow applications, this pipe is also known as Schedule 40.
304 stainless steel pipe offers very good corrosion resistance. 316 stainless steel pipe has excellent corrosion resistance. Alloy 20 stainless steel pipe has the best corrosion resistance of all the stainless steel pipe we offer. Alloy 20 stainless steel is also known as Carpenter 20 and resists cracking from stress and corrosion.
Seamless pipe has a smooth interior for unrestricted flow and is stronger than welded pipe. 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: Natural Gas, Steam, Oil, Water, Air
- Specifications Met: ASTM A733, ANSI/ASME B1.20.1, ASTM A312
- Fittings: Use Class 150 stainless steel
- Flanges: Use Class 150 stainless steel
| Pipe Size | Lg. | Construction | Each | |
| 1/8 | 3/4" | Seamless | 00000000 | 00000 |
| 1/4 | 7/8" | Seamless | 00000000 | 0000 |
| 3/8 | 1" | Seamless | 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 |
- For Use With: Natural Gas, Oil, Steam, Water, Air
- Specifications Met: ASTM A312
- Fittings: Use Class 150 stainless steel
- Flanges: Use Class 150 stainless steel
- For Use With: Natural Gas, Oil, Steam, Water, Air
- Specifications Met: ASTM A312
- Fittings: Use Class 150 stainless steel
- Flanges: Use Class 150 stainless steel
- For Use With: Natural Gas, Steam, Oil, Water, Air
- Specifications Met: ASTM A733, ASTM A312, ANSI/ASME B1.20.1
- Fittings: Use Class 150 stainless steel
- Flanges: Use Class 150 stainless steel
| Pipe Size | Lg. | Construction | Each | |
| 1/8 | 3/4" | Seamless | 00000000 | 00000 |
| 1/4 | 7/8" | Seamless | 00000000 | 0000 |
| 3/8 | 1" | Seamless | 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 | 00000 |
| 2 1/2 | 2 1/2" | Welded | 00000000 | 00000 |
| 3 | 2 5/8" | Welded | 00000000 | 00000 |
| 4 | 2 7/8" | Welded | 00000000 | 00000 |
- For Use With: Water, Steam, Air
- Specifications Met: ANSI/ASME SB729, ASTM B729, ANSI/ASME B36.10
- Fittings: Use Class 150 stainless steel
- Flanges: Use Class 150 stainless steel
Standard-Wall Stainless Steel Threaded
Pipe Nipples and Pipe with Sealant
The threads on this pipe have a sealant applied for extra leak protection in low-pressure applications. Pipe is also known as Schedule 40.
304 stainless steel pipe has very good corrosion resistance. 316 stainless steel pipe has excellent corrosion resistance.
Fully threaded pipe is also known as a close nipple; it is threaded on each end to the center.
Welded pipe has a raised weld bead on the inside. Seamless pipe is smooth.
For technical drawings and 3-D models, click on a part number.
- For Use With: Natural Gas, Steam, Oil, Water, Air
- Specifications Met: ASTM A733, ANSI/ASME B1.20.1, ASTM A312
- Fittings: Use Class 150 stainless steel
- Flanges: Use Class 150 stainless steel
| Pipe Size | Lg. | Thread Type | Construction | Each | |
| 1/8 | 3/4" | NPT | Seamless | 00000000 | 00000 |
| 1/4 | 7/8" | NPT | Seamless | 00000000 | 0000 |
| 3/8 | 1" | NPT | Seamless | 00000000 | 0000 |
| 1/2 | 1 1/8" | NPT | Welded | 00000000 | 0000 |
| 3/4 | 1 3/8" | NPT | Welded | 00000000 | 0000 |
| 1 | 1 1/2" | NPT | Welded | 00000000 | 00000 |
| 1 1/4 | 1 5/8" | NPT | Welded | 00000000 | 00000 |
| 1 1/2 | 1 3/4" | NPT | Welded | 00000000 | 00000 |
| 2 | 2" | NPT | Welded | 00000000 | 00000 |
- For Use With: Natural Gas, Steam, Oil, Water, Air
- Specifications Met: ASTM A733, ASTM A312, ANSI/ASME B1.20.1
- Fittings: Use Class 150 stainless steel
- Flanges: Use Class 150 stainless steel
| Pipe Size | Lg. | Thread Type | Construction | Each | |
| 1/8 | 3/4" | NPT | Seamless | 00000000 | 00000 |
| 1/4 | 7/8" | NPT | Seamless | 00000000 | 0000 |
| 3/8 | 1" | NPT | Seamless | 00000000 | 0000 |
| 1/2 | 1 1/8" | NPT | Welded | 00000000 | 0000 |
| 3/4 | 1 3/8" | NPT | Welded | 00000000 | 0000 |
| 1 | 1 1/2" | NPT | Welded | 00000000 | 00000 |
| 1 1/4 | 1 5/8" | NPT | Welded | 00000000 | 00000 |
| 1 1/2 | 1 3/4" | NPT | Welded | 00000000 | 00000 |
| 2 | 2" | NPT | Welded | 00000000 | 00000 |
Thick-Wall Stainless Steel
Threaded Pipe Nipples and Pipe
Thick walls, also known as Schedule 80, give this pipe the strength to handle high-pressure applications. It is seamless so it has a smooth interior for unrestricted flow.
304 stainless steel pipe has very good corrosion resistance. 316 stainless steel pipe has excellent corrosion resistance. 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, Hydraulic Fluid, Natural Gas, Oil, Steam
- Specifications Met: ASTM A733, ASTM A312, ANSI/ASME B1.20.1
- Fittings: Use Class 3000 stainless steel
- Flanges: Use Use Class 300 or 600 stainless steel
| Pipe Size | Dash Size | Lg. | Thread Type | Construction | Each | |
| 1/8 | 02 | 3/4" | NPT | Seamless | 00000000 | 00000 |
| 1/4 | 04 | 7/8" | NPT | Seamless | 00000000 | 0000 |
| 3/8 | 06 | 1" | NPT | Seamless | 00000000 | 0000 |
| 1/2 | 08 | 1 1/8" | NPT | Seamless | 00000000 | 0000 |
| 3/4 | 12 | 1 3/8" | NPT | Seamless | 00000000 | 0000 |
| 1 | 16 | 1 1/2" | NPT | Seamless | 00000000 | 00000 |
| 1 1/4 | 20 | 1 5/8" | NPT | Seamless | 00000000 | 00000 |
| 1 1/2 | 24 | 1 3/4" | NPT | Seamless | 00000000 | 00000 |
| 2 | 32 | 2" | NPT | Seamless | 00000000 | 00000 |
| 3 | 48 | 2 5/8" | NPT | Seamless | 000000000 | 00000 |
| 4 | 64 | 2 7/8" | NPT | Seamless | 000000000 | 00000 |
- For Use With: Air, Water, Hydraulic Fluid, Natural Gas, Oil, Steam
- Specifications Met: ASTM A733, ASTM A312, ANSI/ASME B1.20.1
- Fittings: Use Class 3000 stainless steel
- Flanges: Use Use Class 300 or 600 stainless steel
| Pipe Size | Dash Size | Lg. | Thread Type | Construction | Each | |
| 1/8 | 02 | 3/4" | NPT | Seamless | 0000000 | 00000 |
| 1/4 | 04 | 7/8" | NPT | Seamless | 0000000 | 0000 |
| 3/8 | 06 | 1" | NPT | Seamless | 0000000 | 0000 |
| 1/2 | 08 | 1 1/8" | NPT | Seamless | 0000000 | 0000 |
| 3/4 | 12 | 1 3/8" | NPT | Seamless | 0000000 | 0000 |
| 1 | 16 | 1 1/2" | NPT | Seamless | 0000000 | 00000 |
| 1 1/4 | 20 | 1 5/8" | NPT | Seamless | 0000000 | 00000 |
| 1 1/2 | 24 | 1 3/4" | NPT | Seamless | 0000000 | 00000 |
| 2 | 32 | 2" | NPT | Seamless | 0000000 | 00000 |
| 3 | 48 | 2 5/8" | NPT | Seamless | 00000000 | 00000 |
| 4 | 64 | 2 7/8" | NPT | Seamless | 00000000 | 00000 |