ASME B16.34 - Group 1.3, Pres-Temp Rating

Written by Jerry Ratzlaff on . Posted in American Society of Mechanical Engineers

American Society of Mechanical Engineers (ASME)

standards

  • ASME B16.34 - Valves Flanged, Threaded and Welding End

ASME B16.34 - Materials in Group 1.3 - Carbon Steel

  • [1] Upon prolonged exposure to temperatures above 800°F, the carbide phase of the steel may be converted to graphite. Permissible, but not recommended for prolonged use above 800°F.
  • [2] Not to be used over 850°F.
  • [3] Leaded grades shall not be used where welded of in any application above 500°F.
  • [4] For service temperatures above 850°F, it is recommended that killed steel containing not less than 0.10% residual silicon be used.
  • [5] Not to be used over 650°F.
Material

Group No.

Material Nominal

Designation

ForgingCastingPlateBarTubular
1.3 C
C-SI
2 1/2 NI
3 1/2 NI
C-MN-SI
- A352 Gr. LCB [5]

 


A515 Gr. 65 [1]
A203 Gr. A [1]
A203 Gr. D [1]
A516 Gr. 65 [1] [2]
A675 Gr. 65 [1] [3] [4]
A672 Gr. B65 [1]


A672 Gr. C65 [1]

ASME B16.34 - Material Group 1.3 - Standard Class, Pressure-Temperature Rating

  • Ratings are maximum allowable working gage pressure (psig) at the temperature listed.
Temp. °F15030040060090015002500
-20 to 100 265 695 925 1390 2085 3470 5785
200 250 655 875 1315 1970 3280 5470
300 230 640 850 1275 1915 3190 5315
400 200 620 825 1235 1850 3085 5145
500 170 585 775 1165 1745 2910 4850
600 140 535 710 1065 1600 2665 4440
650 125 525 695 1045 1570 2615 4355
700 110 520 690 1035 1555 2590 4320
750 95 475 630 945 1420 2365 3945
800 80 390 520 780 1175 1955 3260
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