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Pressure-Temperature of Stainless Steel Valves
　
Temp°F ASTM A351 Gr. CF8M
  (psig)
Working Pressure (psig)		 ASTM A351 Gr. CF3M
  (psig)
Working Pressure (psig)		 ASTM A351 Gr. CN7M
  (psig)
Working Pressure (psig)		 ASTM A494 M-35-1
  (psig)
Working Pressure (psig)		 ASTM A494 Gr. CW-12MW
  (psig)
Working Pressure (psig)
CL. 150 CL. 300 CL. 600 CL. 150 CL. 300 CL. 600 CL. 150 CL. 300 CL. 600 CL. 150 CL. 300 CL. 600 CL. 150 CL. 300 CL. 600
-20 to 100 275 720 1,440 230 600 1,220 230 600 1,200 230 600 N/A 230 600 1,200
200 235 620 1,240 195 505 1,015 200 520 1,045 200 525 N/A 205 540 1,080
300 215 560 1,120 175 455 910 190 490 980 190 490 N/A 195 505 1,015
400 195 515 1,025 160 415 825 190 490 980 180 475 N/A 185 480 960
500 170 480 955 145 380 765 170 490 980 170 470 N/A 170 455 910
600 140 450 900 140 360 720 140 490 980 140 470 N/A 140 440 880
650 125 445 890 125 350 700 125 490 980 125 435 N/A 125 425 850
700 110 430 870 110 345 685 110 490 980 110 405 N/A 110 420 840
750 95 425 855 95 335 670 95 490 980 95 405 N/A 95 415 825
800 80 420 845 80 330 660 80 490 980 80 405 N/A 80 410 815
850 65 420 835 65 320 645       65 325 N/A 65 400 795
900 50 415 830             50 245 N/A 50 395 790
950 35 385 775             25 120 N/A 35 385 775
1000 20 350 700                   20 365 725
1050 20* 345 685                        
1100 20* 305 610                        
1150 20* 235 475                        
1200 20* 185 370                        
1250 20* 145 295                        
1300 20* 115 235                        
1350 20* 95 190                        
1400 20* 75 150                        
1450 20* 60 115                        
1500 15* 40 85                        
* Rating for weld-end valves. Flanged End valves rated to 1000∞F maximum
  Use solution annealed material only. Not to be used over 1000∞F maximumm
Hydrostatic Shell Test Pressures
Class 150 300 600
Pressure 425 1,100 2,175

NOTE: These are design pressure ratings from ASME B16.34-1996 and apply to castings only. Packing and gasket materials may limit temperature range of specific products.
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