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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Low-Pressure Stainless Steel Threaded Pipe Fittings
Use these fittings in a low-pressure pipe line.
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.
Union connectors separate into three pieces so you can access your line without unthreading pipe connections.
Female x male 90° elbow adapters are also known as street elbows.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Fabrication: Heat Treated
- Specifications Met:
NPT: ANSI/MSS SP-114, ASTM A351
BSPP and BSPT: ASNI/MSS SP-114 - Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
304 Stainless Steel | 316 Stainless Steel | ||||||
|---|---|---|---|---|---|---|---|
Pipe Size | Max. Steam Pressure | Max. Pressure | Each | Max. Pressure | Each | ||
NPT Female | |||||||
| 1/8 | 150 psi @ 350° F | 300 psi @ 72° F | 00000000 | 000000 | 300 psi @ 72° F | 00000000 | 000000 |
BSPP Female | |||||||
| 1/8 | 150 psi @ 350° F | 150 psi @ 72° F | 00000000 | 00000 | 150 psi @ 72° F | 00000000 | 00000 |
BSPT Female | |||||||
| 1/8 | 150 psi @ 350° F | 300 psi @ 72° F | 00000000 | 00000 | 150 psi @ 72° F | 00000000 | 00000 |
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Fabrication: Heat Treated
- Specifications Met: ASTM A351
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
316 Stainless Steel | ||||
|---|---|---|---|---|
| Pipe Size | Max. Pressure | Max. Steam Pressure | Each | |
NPT Female × NPT Male | ||||
| 1/8 | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 000000 |
High-Pressure Stainless Steel Threaded Pipe Fittings
Use these heavy duty fittings in high-pressure flow applications.
304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance. Union connectors separate into three pieces so you can access your line without unthreading pipe connections.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Pressure Class: 3000
- Specifications Met: ASTM A182
- Pipe Nipples and Pipe: Use Schedule 80 stainless steel
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.
Union connectors separate into three pieces so you can access your line without unthreading pipe connections.
For technical drawings and 3-D models, click on a part number.
- 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
Low-Pressure Iron and Steel Threaded Pipe Fittings
Use these fittings for low-pressure applications in noncorrosive environments.
Union connectors separate into three pieces so you can access your line without unthreading pipe connections. They have a gasket that creates a tight seal.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class: 150
- Specifications Met: See table
- Pipe Nipples and Pipe: Use Schedule 40 steel
| Pipe Size | Max. Pressure | Max. Steam Pressure | Body Shape | Material | Gasket Material | Specifications Met | Each | |
NPT Female | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/8 | 300 psi @ 72° F | 150 psi @ 350° F | Hex | Iron | Brass | ASME B1.20.1, ASME B16.39 | 000000000 | 000000 |
Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings
The galvanized finish on these fittings provides fair corrosion resistance. Fittings are for use in low-pressure applications.
Union connectors separate so you can access your line without unthreading pipe connections. They have a brass gasket that creates a tight seal.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class: 150
- Specifications Met: See table
- Pipe Nipples and Pipe: Use Schedule 40 galvanized steel
- Flanges: Use Class 150 galvanized steel
| Pipe Size | Max. Pressure | Max. Steam Pressure | Material | Gasket Material | Specifications Met | Each | |
NPT Female | |||||||
|---|---|---|---|---|---|---|---|
| 1/8 | 300 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | Brass | ASME B1.20.1, ASME B16.39, ASTM A197 | 00000000 | 000000 |
High-Pressure Iron and Steel Threaded Pipe Fittings
These fittings can stand up to high-pressure applications. Use them in noncorrosive environments.
Union connectors separate into three pieces so you can access your line without unthreading pipe connections.
Phosphate-coated and zinc-phosphate-coated fittings offer some corrosion resistance, but aren't intended for corrosive environments.
Note: The maximum pressure listed for Class 3000 fittings is for conditions where there are no sudden changes in pressure or velocity. Please refer to ASME B16.11 to determine the specific maximum operating pressure for your application.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Pressure Class: 3000
- Specifications Met: MSS SP-83, ASME B1.20.1, ASTM A105
- Pipe Nipples and Pipe: Use Schedule 160 steel
- Flanges: Use Class 1500 steel
| Pipe Size | Dash Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Female | ||||||
|---|---|---|---|---|---|---|
| 1/8 | 02 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 000000 |
Medium-Pressure Iron and Steel Threaded Pipe Fittings
With better strength than our low-pressure iron and steel pipe fittings, these can handle medium-pressure applications. They are for use in noncorrosive environments.
Union connectors separate into three pieces so you can access your line without unthreading pipe connections.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class : 300
- Specifications Met: ASTM A197, UL Listed, ASME B16.39, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 80 steel
- Flanges: Use Class 300 or 600 steel
| Pipe Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Female | |||||
|---|---|---|---|---|---|
| 1/8 | 600 psi @ 72° F | 230 psi @ 550° F | Iron | 00000000 | 000000 |
High-Pressure Socket-Connect Steel Unthreaded Pipe Fittings
Socket-connect fittings are easier to weld than butt-weld fittings because the fitting doesn’t need to align perfectly to the pipe. Slide pipe into the socket and weld for a strong, permanent connection. Fittings have heavy duty construction that stands up to high-pressure applications. They are for use in noncorrosive environments.
Union straight connectors separate into three pieces for access to your line.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class : 3000
- Specifications Met: ASTM A105, MSS SP-83
- Pipe Nipples and Pipe: Use Schedule 80 steel
- Flanges: Use Class 300 and 600 steel
| Pipe Size | Max. Pressure | Material | Each | |
| 1/8 | 3,000 psi @ 72° F | Steel | 000000000 | 000000 |
High-Pressure Brass Threaded Pipe Fittings
These fittings have the strength to handle high-pressure applications. They are brass for good corrosion resistance.
Union connectors separate into three pieces so you can access your line without unthreading pipe connections.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Water
| Pipe Size | Max. Pressure | Each | |
NPT Female | |||
|---|---|---|---|
| 1/8 | 1,200 psi @ 72° F | 000000000 | 000000 |
High-Pressure Brass Threaded Pipe Fittings for Drinking Water
Use these heavy duty fittings for high-pressure drinking water applications. They are brass which has good corrosion resistance. They meet NSF/ANSI 61 safety standards for use with drinking water systems.
Union connectors separate into three pieces so you can access your line without unthreading pipe connections.
NPTF (Dryseal) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
- For Use With: Drinking Water
- Specifications Met: NSF/ANSI 61
| Pipe Size | Max. Pressure | Each | |
NPTF Female | |||
|---|---|---|---|
| 1/8 | 1,000 psi @ 72° F | 00000000 | 000000 |
Low-Pressure Brass and Bronze Threaded Pipe Fittings
Use these fittings in low-pressure flow applications. They have good corrosion resistance. Fittings rated for use with drinking water meet NSF/ANSI 61 safety standards.
Union connectors separate into three pieces so you can access your line without unthreading pipe connections.
For technical drawings and 3-D models, click on a part number.
- For Use With:
NPT: Air, Drinking Water, Natural Gas, Oil
BSPT: Air, Natural Gas, Oil, Steam, Water - Pressure Class: 125
- Specifications Met:
NPT: ASME B1.20.1, ASME B16.15, NSF/ANSI 61
BSPT: ASME BS21, ASTM B584 - Pipe Nipples and Pipe: Use Schedule 40 brass
- Flanges:
NPT: Use Class 150 brass
BSPT: Use Class 150 bronze
Low-Pressure Plated Brass Threaded Pipe Fittings
Used in low-pressure pipe lines, these brass fittings have a plating that makes them shiny and improves corrosion resistance.
Chrome-plated brass fittings are shinier and withstand corrosion better than nickel-plated brass fittings.
Union connectors separate into three pieces so you can access your line without unthreading pipe connections.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 125
- Specifications Met: ASTM B456
- Pipe Nipples and Pipe: Use Schedule 40 brass
| Pipe Size | Max. Pressure | Max. Steam Pressure | Each | |
NPT Female | ||||
|---|---|---|---|---|
Chrome-Plated Brass | ||||
| 1/8 | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 000000 |