Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!
Maximum working pressures of cast iron pipe fittings - threaded fittings according ANSI B16.4:
| Maximum Working Pressure (psig) | ||
|---|---|---|
| Temperature (oF) | Pressure Class | |
| 125 | 250 | |
| -20 to 150 | 175 | 400 |
| 200 | 165 | 370 |
| 250 | 150 | 340 |
| 300 | 140 | 310 |
| 350 | 125 | 280 |
| 400 | - | 250 |
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