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.
More
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.
304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance. 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.
Union connectors separate into three pieces so you can access your line without unthreading pipe connections.
Threaded female x butt weld straight adapters are also known as half couplings.
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
Pipe Size | Max. Pressure | Max. Steam Pressure | Each | |
304 Stainless Steel | ||||
---|---|---|---|---|
NPT Female | ||||
1/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 |
1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 |
3/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 |
1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 |
3/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 |
1 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 |
1 1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 |
1 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 |
2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 |
2 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 |
3 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 |
4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 |
316 Stainless Steel | ||||
NPT Female | ||||
1/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 |
1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 |
3/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 |
1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 |
3/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 |
1 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 |
1 1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 |
1 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 |
2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 |
2 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 |
3 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 |
4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 |
Alloy 20 Stainless Steel | ||||
NPT Female | ||||
1/2 | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 00000 |
3/4 | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 000000 |
1 | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 000000 |
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 1000
- Specifications Met: ANSI/MSS SP-114, ASTM A182
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
304 Stainless Steel | 316 Stainless Steel | |||||
---|---|---|---|---|---|---|
Pipe Size | Max. Pressure | Max. Steam Pressure | Each | Each | ||
NPT Female | ||||||
1/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 000000 | 00000000 | 000000 |
1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 | 00000000 | 00000 |
3/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 | 00000000 | 00000 |
1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 | 00000000 | 00000 |
3/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
1 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
1 1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 000000 |
1 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 | 00000000 | 000000 |
2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 | 00000000 | 000000 |
2 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 | 00000000 | 000000 |
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class : 1000
- Specifications Met: ANSI/MSS SP-114, ASTM A182
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
304 Stainless Steel | 316 Stainless Steel | |||||
---|---|---|---|---|---|---|
Pipe Size | Max. Pressure | Max. Steam Pressure | Each | Each | ||
NPT Female × Butt Weld | ||||||
1/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 | 00000000 | 0000 |
3/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 | 00000000 | 0000 |
1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 | 00000000 | 0000 |
3/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 | 00000000 | 0000 |
1 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
1 1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 | 00000000 | 00000 |
1 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 | 00000000 | 00000 |
2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 | 00000000 | 00000 |
2 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 000000 |
3 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 | 00000000 | 000000 |
4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 | 00000000 | 000000 |
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class : 1000
- Specifications Met: ANSI/MSS SP-114, ASTM A182
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
Pipe Size | 304 Stainless Steel | 316 Stainless Steel | |||||
---|---|---|---|---|---|---|---|
(A) | (B) | Max. Pressure | Max. Steam Pressure | Each | Each | ||
NPT Female | |||||||
1/4 | 1/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
3/8 | 1/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 | 00000000 | 00000 |
3/8 | 1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 | 00000000 | 00000 |
1/2 | 1/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 | 00000000 | 00000 |
1/2 | 1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 | 00000000 | 00000 |
1/2 | 3/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 | 00000000 | 00000 |
3/4 | 1/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 000000 | 00 |
3/4 | 1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
3/4 | 3/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
3/4 | 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
1 | 1/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 000000 | 00 |
1 | 1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
1 | 3/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
1 | 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
1 | 3/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
1 1/4 | 1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
1 1/4 | 3/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 000000 | 00 | 00000000 | 00000 |
1 1/4 | 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
1 1/4 | 3/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
1 1/4 | 1 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
1 1/2 | 1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
1 1/2 | 3/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 000000 | 00 |
1 1/2 | 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
1 1/2 | 3/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
1 1/2 | 1 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
1 1/2 | 1 1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
2 | 3/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
2 | 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
2 | 3/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
2 | 1 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
2 | 1 1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
2 | 1 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
2 1/2 | 2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 000000 |
3 | 1 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 | 00000000 | 000000 |
3 | 2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 | 00000000 | 000000 |
4 | 3 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 | 000000 | 00 |
- 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
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class : 1000
- Specifications Met: ANSI/MSS SP-114, ASTM A182
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
304 Stainless Steel | 316 Stainless Steel | |||||
---|---|---|---|---|---|---|
Pipe Size | Max. Pressure | Max. Steam Pressure | Each | Each | ||
NPT Female | ||||||
1/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 | 00000000 | 00000 |
1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 0000 | 00000000 | 0000 |
3/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 0000 | 00000000 | 0000 |
1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 0000 | 00000000 | 0000 |
3/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 0000 | 00000000 | 00000 |
1 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 | 00000000 | 00000 |
1 1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 | 00000000 | 00000 |
1 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 | 00000000 | 00000 |
2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 | 00000000 | 00000 |
2 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 000000 |
3 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 | 00000000 | 000000 |
4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 | 000000 | 00 |