Cast Iron Flanged Pipe Fittings - Working Pressures vs. Temperature
Maximum working pressures for cast iron flanged pipe fittings according ANSI B16.1.
Maximum working pressures for cast iron flanged pipe fittings according ANSI B16.1:
Temperature (oF) | Maximum Working Pressure (psig) | ||||
---|---|---|---|---|---|
Pressure Class | |||||
125 | 250 | ||||
Pipe Size (inches) | |||||
1 - 12 | 14 - 24 | 30 - 48 | 1 - 12 | 14 - 24 1) | |
-20 to 150 | 200 | 150 | 150 | 500 | 300 |
200 | 190 | 135 | 115 | 460 | 280 |
225 | 180 | 130 | 100 | 440 | 270 |
250 | 175 | 125 | 85 | 415 | 260 |
275 | 170 | 120 | 65 | 395 | 250 |
300 | 165 | 110 | 50 | 375 | 240 |
325 | 155 | 105 | - | 355 | 230 |
350 | 150 | 100 | - | 335 | 220 |
375 | 145 | - | - | 315 | 210 |
400 | 140 | - | - | 290 | 200 |
425 | 130 | - | - | 270 | - |
450 | 125 | - | - | 250 | - |
1) For liquid services - flanges only. Materials of construction ASTM A 126 Class B
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