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Maximum allowable non-shock pressure (psig)and temperature ratings for steel pipe flanges and flanged fittings according the American National Standard ANSI B16.5 - 1988.
| Maximum Allowable non-shock Pressure (psig) |
Temperature
(oF) |
Pressure Class (lb) |
| 150 |
300 |
400 |
600 |
900 |
1500 |
2500 |
| Hydrostatic Test Pressure (psig) |
| 450 |
1125 |
1500 |
2225 |
3350 |
5575 |
9275 |
| -20 to 100 |
285 |
740 |
990 |
1480 |
2220 |
3705 |
6170 |
| 200 |
260 |
675 |
900 |
1350 |
2025 |
3375 |
5625 |
| 300 |
230 |
655 |
875 |
1315 |
1970 |
3280 |
5470 |
| 400 |
200 |
635 |
845 |
1270 |
1900 |
3170 |
5280 |
| 500 |
170 |
600 |
800 |
1200 |
1795 |
2995 |
4990 |
| 600 |
140 |
550 |
730 |
1095 |
1640 |
2735 |
4560 |
| 650 |
125 |
535 |
715 |
1075 |
1610 |
2685 |
4475 |
| 700 |
110 |
535 |
710 |
1065 |
1600 |
2665 |
4440 |
| 750 |
95 |
505 |
670 |
1010 |
1510 |
2520 |
4200 |
| 800 |
80 |
410 |
550 |
825 |
1235 |
2060 |
3430 |
| 850 |
65 |
270 |
355 |
535 |
805 |
1340 |
2230 |
| 900 |
50 |
170 |
230 |
345 |
515 |
860 |
1430 |
| 950 |
35 |
105 |
140 |
205 |
310 |
515 |
860 |
| 1000 |
20 |
50 |
70 |
105 |
155 |
260 |
430 |
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