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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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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.
For technical drawings and 3-D models, click on a part number.
Union Straight Connectors
Exploded View
- 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 | ||
BSPP Female | |||||||
| 1/8 | 150 psi @ 350° F | 150 psi @ 72° F | 00000000 | 000000 | 150 psi @ 72° F | 00000000 | 000000 |
| 1/4 | 150 psi @ 350° F | 150 psi @ 72° F | 00000000 | 00000 | 150 psi @ 72° F | 00000000 | 00000 |
| 3/8 | 150 psi @ 350° F | 150 psi @ 72° F | 00000000 | 00000 | 150 psi @ 72° F | 00000000 | 00000 |
| 1/2 | 150 psi @ 350° F | 300 psi @ 72° F | 00000000 | 00000 | 150 psi @ 72° F | 00000000 | 00000 |
| 3/4 | 150 psi @ 350° F | 300 psi @ 72° F | 00000000 | 00000 | 150 psi @ 72° F | 00000000 | 00000 |
| 1 | 150 psi @ 350° F | 300 psi @ 72° F | 00000000 | 00000 | 150 psi @ 72° F | 00000000 | 00000 |
| 1 1/4 | 150 psi @ 350° F | 300 psi @ 72° F | 00000000 | 00000 | 150 psi @ 72° F | 00000000 | 00000 |
| 1 1/2 | 150 psi @ 350° F | 300 psi @ 72° F | 00000000 | 00000 | 150 psi @ 72° F | 00000000 | 00000 |
| 2 | 150 psi @ 350° F | 300 psi @ 72° F | 00000000 | 000000 | 150 psi @ 72° F | 00000000 | 00000 |