Download ASME Flanges_pressure Classes PDF

TitleASME Flanges_pressure Classes
File Size42.4 KB
Total Pages2
Document Text Contents
Page 1

Table 2-1.1 Pressure–Temperature Ratings for Group 1.1 Materials

Nominal Designation Forgings Castings Plates

C�Si A 105 (1) A 216 Gr. A 515 Gr. 70 (1)
WCB (1)

C�Mn�Si A 350 Gr. LF2 (1) . . . A 516 Gr. 70 (1), (2)
C�Mn�Si�V A 350 Gr. LF6 Cl 1 (3) . . . A 537 Cl. 1 (4)
31�2Ni A 350 Gr. LF3 . . . . . .

Working Pressure by Classes, bar

Class

Temp., °C 150 300 400 600 900 1500 2500

�29 to 38 19.6 51.1 68.1 102.1 153.2 255.3 425.5
50 19.2 50.1 66.8 100.2 150.4 250.6 417.7

100 17.7 46.6 62.1 93.2 139.8 233.0 388.3
150 15.8 45.1 60.1 90.2 135.2 225.4 375.6
200 13.8 43.8 58.4 87.6 131.4 219.0 365.0

250 12.1 41.9 55.9 83.9 125.8 209.7 349.5
300 10.2 39.8 53.1 79.6 119.5 199.1 331.8
325 9.3 38.7 51.6 77.4 116.1 193.6 322.6
350 8.4 37.6 50.1 75.1 112.7 187.8 313.0
375 7.4 36.4 48.5 72.7 109.1 181.8 303.1

400 6.5 34.7 46.3 69.4 104.2 173.6 289.3
425 5.5 28.8 38.4 57.5 86.3 143.8 239.7
450 4.6 23.0 30.7 46.0 69.0 115.0 191.7
475 3.7 17.4 23.2 34.9 52.3 87.2 145.3
500 2.8 11.8 15.7 23.5 35.3 58.8 97.9
538 1.4 5.9 7.9 11.8 17.7 29.5 49.2

NOTES:
(1) Upon prolonged exposure to temperatures above 425°C, the carbide phase of steel may be con-

verted to graphite. Permissible but not recommended for prolonged use above 425°C.
(2) Not to be used over 455°C.
(3) Not to be used over 260°C.
(4) Not to be used over 370°C.

Similer Documents