Flange Pressure Charts

A105 PRESSURE CHART

CLASS
  75 150 300 400 600 900 1500 2500
TEST PRESSURE   425 1100 1450 2175 3250 5400 9000
ANSI B16.5 - ASME B16.5
-20 - 100F   275 720 960 1440 2160 3600 6000
150F   255 710 945 1420 2130 3550 5915
200F   240 700 930 1400 2100 3500 5830
250F   225 690 920 1380 2070 3450 5750
300F   210 680 910 1365 2050 3415 5690
350F   195 675 900 1350 2025 3375 5625
400F   180 665 890 1330 2000 3330 5550
450F   165 650 870 1305 1955 3255 5430
500F   150 625 835 1250 1875 3125 5210
550F   140 590 790 1160 1775 2955 4925
600F   130 555 740 1110 1660 2770 4620
650F   120 515 690 1030 1550 2560 4300
700F   110 470 535 940 1410 2350 3920
750F   100 425 575 850 1275 2125 3550
800F   92 365 490 730 1100 1830 3050
850F   82 300 400 600 900 1500 2500
900F   70 225 295 445 670 1115 1855
950F   55 155 205 310 465 770 1285
950F   55 155 205 310 465 770 1285
MSS SP-44 - ASME B16.47 Class A
-20 - 100F   285 740 990 1480 2220    
300F   275 715 955 1430 2145    
350F   265 690 925 1380 2070    
400F   255 665 890 1330 2000    
450F   245 640 860 1285 1925    
API 605 - ASME B16.47 Class B
100F 140 285 740 990 1480 2220    
200F 130 260 675 900 1350 2025    
300F 115 230 665 875 1315 1970    
400F 100 200 635 845 1270 1900    
500F 85 170 600 800 1200 1795    
600F 70 140 550 730 1095 1640    
650F 60 125 535 715 1075 1610    
700F   110 535 710 1065 1600    
750F   95 505 670 1010 1510    
800F   80 410 550 825 1235    
850F   65 270 355 535 805    
900F   50 170 230 345 515    
950F   35 105 140 205 310    
1000F   20 50 70 105 155    

 

*Pressures based on using A193 B-7 Bolting
** Every effort has been made to insure the accuracy of this chart, for critical applications consult a qualified engineer.

 316 PRESSURE CHART

WORKING PRESSURES BY CLASSES, psig
Class Temp ºF 150 300 400 600 900 1500 2500
-20 to 100 275 720 960 1440 2160 3600 6000
200 235 620 825 1240 1860 3095 5160
300 215 560 745 1120 1680 2795 4660
400 195 515 685 1025 1540 2570 4280
500 170 480 635 955 1435 2390 3980
600 140 450 600 900 1355 2255 3760
650 125 440 590 885 1325 2210 3680
700 110 435 580 870 1305 2170 3620
750 95 425 570 855 1280 2135 3560
800 80 420 565 845 1265 2110 3520
850 65 420 555 835 1255 2090 3480
900 50 415 555 830 1245 2075 3460
950 35 385 515 775 1160 1930 3220
1000 20 365 485 725 1090 1820 3030

 

** Every effort has been made to insure the accuracy of this chart, for critical applications consult a qualified engineer.

 

WORKING PRESSURES BY CLASSES, bar
Class Temp ºC15030040060090015002500
-29 to 38 19 49.6 66.2 99.3 148.9 248.2 413.7
50 18.4 48.1 64.2 96.2 144.3 240.6 400.9
100 16.2 42.2 56.3 84.4 126.6 211 351.6
150 14.8 38.5 51.3 77 115.5 192.5 320.8
200 13.7 35.7 47.6 71.3 107 178.3 297.2
250 12.1 33.4 44.5 66.8 100.1 166.9 278.1
300 10.2 31.6 42.2 63.2 94.9 158.1 263.5
325 9.3 30.9 41.2 61.8 92.7 154.4 257.4
350 8.4 30.3 40.4 60.7 91 151.6 252.7
375 7.4 29.9 39.8 59.8 89.6 149.4 249
400 6.5 29.4 39.3 58.9 88.3 147.2 245.3
425 5.5 29.1 38.9 58.3 87.4 145.7 242.9
450 4.6 28.8 38.5 57.7 86.5 144.2 240.4
475 3.7 28.7 38.2 57.3 86 143.4 238.9
500 2.8 28.2 37.6 56.5 84.7 140.9 235
538 1.4 25.2 33.4 50 75.2 125.5 208.9

Flange End Pressure Ratings – Pressure ratings for fittings that have both tube fitting end connections and flange connections are determined by the connection with the lowest pressure rating.

*Pressures based on using A193 B-7 Bolting
** Every effort has been made to insure the accuracy of this chart, for critical applications consult a qualified engineer.

ANSI B16.5 Class 150 Flanges

ANSI B16.5 Class 300 Flanges

ANSI B16.5 Class 600 Flanges

ANSI B16.5 Class 900 Flanges

ANSI B16.5 Class 1500 Flanges

ANSI B16.5 Class 2500 Flanges