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![]() | Pipe |
For Pipe Schedule For Pipe Schedule |
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Maximum Pressure Maximum Pressure |
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System of Measurement System of Measurement |
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Maximum Steam Pressure Maximum Steam Pressure |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Fabrication Fabrication |
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Threading Threading |
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![]() | Threaded on Both Ends |
![]() | Fully Threaded |
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. 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.
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: Water, Steam, Air
- Specifications Met: ASTM B729, ASME B1.20.1
- Fittings: Use Class 150 stainless steel
- Flanges: Use Class 150 stainless steel
Lg. | Construction | Each | |
1/2 Pipe Size | |||
---|---|---|---|
2" | Seamless | 0000000 | 000000 |
3" | Seamless | 0000000 | 00000 |
4" | Seamless | 0000000 | 00000 |
6" | Seamless | 0000000 | 000000 |
3/4 Pipe Size | |||
2" | Seamless | 0000000 | 00000 |
3" | Seamless | 0000000 | 00000 |
4" | Seamless | 0000000 | 00000 |
6" | Seamless | 0000000 | 000000 |
1 Pipe Size | |||
2" | Seamless | 0000000 | 00000 |
3" | Seamless | 0000000 | 00000 |
4" | Seamless | 0000000 | 000000 |
1 1/2 Pipe Size | |||
2" | Seamless | 0000000 | 000000 |
3" | Seamless | 0000000 | 000000 |
2 Pipe Size | |||
6" | Seamless | 0000000 | 000000 |
Low-Pressure Stainless Steel Threaded Pipe Flanges
Also known as Pressure Class 150 flanges, these are designed for low-pressure pipe applications. Bolt two flat-surface flanges or two raised-surface flanges of the same size together with a gasket (sold separately) to create an access point within a line. Alloy 20 stainless steel flanges have the best corrosion resistance of all the stainless steel flanges we offer. Alloy 20 stainless steel is also known as Carpenter 20 and resists cracking from stress and corrosion.
Forged flanges have better strength than cast flanges. They are also called ANSI flanges.
For technical drawings and 3-D models, click on a part number.


- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Specifications Met:
Alloy 20 flanges: ASME B16.5
All other flanges: ASME B16.5, ASTM A182 - Fittings: Use Class 150 stainless steel
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
Bolt Hole | Alloy 20 Stainless Steel | ||||||||
---|---|---|---|---|---|---|---|---|---|
Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Each | |
NPT | |||||||||
1/2 | 3 1/2" | 1/2" | 0.62" | 4 | 2 3/8" | 290 psi @ 72° F | 200 psi @ 360° F | 0000000 | 0000000 |
3/4 | 3 7/8" | 1/2" | 0.62" | 4 | 2 3/4" | 290 psi @ 72° F | 200 psi @ 360° F | 0000000 | 000000 |
1 | 4 1/4" | 1/2" | 0.62" | 4 | 3 1/8" | 290 psi @ 72° F | 200 psi @ 360° F | 0000000 | 000000 |
1 1/2 | 5" | 1/2" | 0.62" | 4 | 3 7/8" | 290 psi @ 72° F | 200 psi @ 360° F | 0000000 | 000000 |
2 | 6" | 5/8" | 0.75" | 4 | 4 3/4" | 290 psi @ 72° F | 200 psi @ 360° F | 0000000 | 000000 |
Medium-Pressure Stainless Steel Threaded Pipe Fittings
Choose these fittings when you want the same high-quality found in our low-pressure pipe fittings, but need more strength to handle higher pressures.
Fittings that meet ANSI/MSS SP-114 adhere to high-quality standards for heat treating, material thickness, and marking. Alloy 20 stainless steel fittings have the best corrosion resistance of all the stainless steel fittings we offer. Alloy 20 stainless steel is also known as Carpenter 20 and resists cracking from stress and corrosion.
For technical drawings and 3-D models, click on a part number.

- For Use With:
Alloy 20 connectors: Air, Steam, Water
All other connectors: Air, Natural Gas, Oil, Steam, Water - Pressure Class: 1000
- Specifications Met:
Alloy 20 connectors: ANSI/MSS SP-114, ASME B1.20.1, ASTM B473
All other connectors: ANSI/MSS SP-114, ASTM A182 - Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel

- For Use With:
316 Stainless Steel: Air, Coolant, Natural Gas, Oil, Steam, Water
Alloy 20 Stainless Steel: Air, Steam, Water - Pressure Class:
316 Stainless Steel: 150
Alloy 20 Stainless Steel: Not Rated - Specifications Met: See Table
- Pipe Nipples and Pipe:
316 Stainless Steel: Use Schedule 40 316/316L stainless steel
Alloy 20 Stainless Steel: Use Schedule 40 alloy 20 stainless steel - Flanges:
316 Stainless Steel: Use 316/316L stainless steel
Alloy 20 Stainless Steel: Use Class 150 alloy 20 stainless steel

- For Use With: Air, Water, Steam
- Pressure Class: Not Rated
- Specifications Met: ASTM B473, ASME B16.11, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
Pipe Size | Alloy 20 Stainless Steel | ||||
---|---|---|---|---|---|
(A) | (B) | Max. Pressure | Max. Steam Pressure | Each | |
NPT Male × NPT Female | |||||
1/4 | 1/8 | Not Rated | Not Rated | 0000000 | 000000 |
3/8 | 1/4 | Not Rated | Not Rated | 0000000 | 00000 |
1/2 | 1/4 | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 000000 |
3/4 | 1/2 | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 000000 |
1 | 3/4 | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 000000 |

- For Use With: Air, Water, Steam
- Pressure Class : 150
- Specifications Met: ANSI/MSS SP-114, ASTM B351, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
Alloy 20 Stainless Steel | ||||
---|---|---|---|---|
Pipe Size | Max. Pressure | Max. Steam Pressure | Each | |
NPT Female | ||||
1/4 | 1,000 psi @ 72° F | 560 psi @ 360° F | 0000000 | 0000000 |
3/8 | 1,000 psi @ 72° F | 560 psi @ 360° F | 0000000 | 000000 |
1/2 | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 000000 |
3/4 | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 000000 |
1 | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 000000 |
1 1/2 | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 000000 |
2 | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 000000 |

- For Use With: Air, Water, Steam
- Pressure Class: See Table
- Specifications Met: See Table
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
Alloy 20 Stainless Steel | ||||||
---|---|---|---|---|---|---|
Pressure Class | Pipe Size | Max. Pressure | Max. Steam Pressure | Specifications Met | Each | |
NPT Female | ||||||
1000 | 1/4 | 1,000 psi @ 72° F | 560 psi @ 360° F | ANSI/MSS SP-114, ASME B1.20.1, ASTM B473 | 0000000 | 0000000 |
1000 | 3/8 | 1,000 psi @ 72° F | 560 psi @ 360° F | ANSI/MSS SP-114, ASME B1.20.1, ASTM B473 | 0000000 | 000000 |
150 | 1/2 | 300 psi @ 72° F | 150 psi @ 360° F | ANSI/MSS SP-114, ASME B1.20.1, ASTM B351 | 0000000 | 000000 |
150 | 3/4 | 300 psi @ 72° F | 150 psi @ 360° F | ANSI/MSS SP-114, ASME B1.20.1, ASTM B351 | 0000000 | 000000 |
150 | 1 | 300 psi @ 72° F | 150 psi @ 360° F | ANSI/MSS SP-114, ASME B1.20.1, ASTM B351 | 0000000 | 000000 |
150 | 1 1/2 | 300 psi @ 72° F | 150 psi @ 360° F | ANSI/MSS SP-114, ASME B1.20.1, ASTM B351 | 0000000 | 000000 |
150 | 2 | 300 psi @ 72° F | 150 psi @ 360° F | ANSI/MSS SP-114, ASME B1.20.1, ASTM B351 | 0000000 | 000000 |

- For Use With: Air, Water, Steam
- Pressure Class: Not Rated
- Specifications Met: ASME B16.11, ASTM B473, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
Alloy 20 Stainless Steel | ||||
---|---|---|---|---|
Pipe Size | Max. Pressure | Max. Steam Pressure | Each | |
NPT Male | ||||
1/8 | Not Rated | Not Rated | 0000000 | 000000 |
1/4 | Not Rated | Not Rated | 0000000 | 00000 |
3/8 | Not Rated | Not Rated | 0000000 | 00000 |
1/2 | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 00000 |
3/4 | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 00000 |
1 | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 000000 |
1 1/2 | Not Rated | Not Rated | 0000000 | 000000 |
2 | Not Rated | Not Rated | 0000000 | 000000 |