Valve Body Materials (ASME B16.34) Pressure/temperature Ratings
Table 2-1.1 Ratings for Group 1.1 Materials
A216 Gr. WCB, ASTM A105
A350 Gr. LF2, A350 Gr. LF3
Standard Class
| Temperature, ℃ | Working Pressures by Class, bar | |||||
| 150 | 300 | 600 | 900 | 1500 | 2500 | |
| -29 to 38 | 19.6 | 51.1 | 102.1 | 153.2 | 255.3 | 425.5 |
| 50 | 19.2 | 50.1 | 100.2 | 150.4 | 250.6 | 417.7 |
| 100 | 17.7 | 46.6 | 93.2 | 139.8 | 233.0 | 388.3 |
| 150 | 15.8 | 45.1 | 90.2 | 135.2 | 225.4 | 375.6 |
| 200 | 13.8 | 43.8 | 87.6 | 131.4 | 219.0 | 365.0 |
| 250 | 12.1 | 41.9 | 83.9 | 125.8 | 209.7 | 349.5 |
| 300 | 10.2 | 39.8 | 79.6 | 119.5 | 199.1 | 331.8 |
| 325 | 93 | 38.7 | 77.4 | 116.1 | 193.6 | 322.6 |
| 350 | 8.4 | 37.6 | 75.1 | 112.7 | 187.8 | 313.0 |
| 375 | 7.4 | 36.4 | 72.7 | 109.1 | 181.8 | 303.1 |
| 400 | 6.5 | 34.7 | 69.4 | 104.2 | 173.6 | 289.3 |
| 425 | 5.5 | 28.8 | 57.5 | 86.3 | 143.8 | 239.7 |
| 450 | 4.6 | 23.0 | 46.0 | 69.0 | 115.0 | 191.7 |
| 475 | 3.7 | 17.4 | 34.9 | 52.3 | 87.2 | 145.3 |
| 500 | 2.8 | 11.8 | 23.5 | 35.3 | 58.8 | 97.9 |
| 538 | 1.4 | 5.9 | 11.8 | 17.7 | 29.5 | 49.2 |
NOTES:
(1) WCB, A105, LF2 - Upon prolonged exposure to temperatures above 425°C, the carbide phase of steel may be converted to graphite. Permissible, but not recommended for prolonged usage above 425°C.
(2) A105 - Only killed steel shall be used above 455°C.
(3) LF3 - Not to be used over 345°C
Table 2-1.2 Ratings for Group 1.2 Materials
A216 Gr. WCC,A352 Gr. LCC
A350 Gr. LF6 Cl. 2, A352 Gr. LC2, A352 Gr. LC3
Standard Class
| Temperature, ℃ | Working Pressures by Class, bar | ||||||
| 150 | 300 | 600 | 900 | 1500 | 2500 | 4500 | |
| -29 to 38 | 19.8 | 51.7 | 103.4 | 155.1 | 258.6 | 430.9 | 775.7 |
| 50 | 19.5 | 51.7 | 103.4 | 155.1 | 258.6 | 430.9 | 775.7 |
| 100 | 17.7 | 51.5 | 103.0 | 154.6 | 257.6 | 429.4 | 773.0 |
| 150 | 15.8 | 50.2 | 100.3 | 150.5 | 250.8 | 418.1 | 752.6 |
| 200 | 13.8 | 48.6 | 97.2 | 145.8 | 243.2 | 405.4 | 729.7 |
| 250 | 12.1 | 46.3 | 92.7 | 139.0 | 231.8 | 386.2 | 694.8 |
| 300 | 10.2 | 42.9 | 85.7 | 128.6 | 214.4 | 357.1 | 642.6 |
| 325 | 9.3 | 41.4 | 82.6 | 124.0 | 206.6 | 344.3 | 619.6 |
| 350 | 8.4 | 40.0 | 80.0 | 120.1 | 200.1 | 333.5 | 600.3 |
| 375 | 7.4 | 37.8 | 75.7 | 113.5 | 189.2 | 315.3 | 567.5 |
| 400 | 6.5 | 34.7 | 69.4 | 104.2 | 173.6 | 289.3 | S20.8 |
| 425 | 5.5 | 28.8 | 57.5 | 86.3 | 143.8 | 239.7 | 431.5 |
| 450 | 4.6 | 23.0 | 46.0 | 69.0 | 115.0 | 191.7 | 345.1 |
| 475 | 3.7 | 17.1 | 34.2 | 513 | 85.4 | 142.4 | 256.3 |
| 500 | 2.8 | 11.6 | 23.2 | 34.7 | 57.9 | 96.5 | 173.7 |
| 538 | 1.4 | 5.9 | 11.8 | 17.7 | 29.5 | 49.2 | 88.6 |
NOTES:
(1) A216 Gr. WCC - Upon prolonged exposure to temperatures above 425°C, the carbide phase of steel may be converted to graphite. Permissible, but not recommended for prolonged usage above 425°C.
(2) A350 Gr. LF6 Cl. 2 - Not to be used over 260°C.
(3) A352 Gr. LCC, A352 Gr. LC2, A352 Gr. LC3 - Not to be used over 345°C.
Table 2-1.3 Ratings for Group 1.3 Materials
A352 Gr. LCB
Standard Class
| Temperature ℃ | Working Pressures by Class, bar | ||||||
| 150 | 300 | 600 | 900 | 1500 | 2500 | 4500 | |
| -29 to 38 | 18.4 | 48.0 | 96.0 | 144.1 | 240.1 | 400.1 | 720.3 |
| 50 | 18.2 | 47.5 | 94.9 | 142.4 | 237.3 | 395.6 | 712.0 |
| 100 | 17.4 | 45.3 | 90.7 | 136.0 | 226.7 | 377.8 | 680.1 |
| 150 | 15.8 | 43.9 | 87.9 | 131.8 | 219.7 | 366.1 | 659.1 |
| 200 | 13.8 | 42.5 | 85.1 | 127.6 | 212.7 | 354.4 | 638.0 |
| 250 | 12.1 | 40.8 | 81.6 | 122.3 | 203.9 | 339.8 | 611.7 |
| 300 | 10.2 | 38.7 | 77.4 | 116.1 | 193.4 | 322.4 | 580.3 |
| 325 | 93 | 37.6 | 75.2 | 112.7 | 187.9 | 313.1 | 563.7 |
| 350 | 8.4 | 36.4 | 72.8 | 109.2 | 182.0 | 303.3 | 545.9 |
| 375 | 7.4 | 35.0 | 69.9 | 104.9 | 174.9 | 291.4 | 524.6 |
| 400 | 6.5 | 32.6 | 65.2 | 97.9 | 163.1 | 271.9 | 489.3 |
| 425 | 5.5 | 27.3 | 54.6 | 81.9 | 136.5 | 227.5 | 409.5 |
| 450 | 4.6 | 21.6 | 43.2 | 64.8 | 107.9 | 179.9 | 323.8 |
| 475 | 3.7 | 15.7 | 31.3 | 47.0 | 78.3 | 130.6 | 235.0 |
| 500 | 2.8 | 11.1 | 22.1 | 33.2 | 55.4 | 923 | 166.1 |
| 538 | 1.4 | 5.9 | 11.8 | 17.7 | 29.5 | 49.2 | 88.6 |
Note:
(1) A352 Gr. LCB - Not to be used over 345°C.
Table 2-2.1 Ratings for Group 2.1 Materials
A182 Gr. F304, A351 Gr. CF8
A351 Gr. CF3, A351 Gr. CF10, A182 Gr. F304H
Standard Class
| Temperature ℃ |
Working Pressures by Class, bar | ||||||
| 150 | 300 | 600 | 900 | 1500 | 2500 | 4500 | |
| -29 to 38 | 19.8 | 51.7 | 103.4 | 155.1 | 258.6 | 430.9 | 775.7 |
| 50 | 19.4 | 50.5 | 101.0 | 151.5 | 252.5 | 420.8 | 757.4 |
| 100 | 17.5 | 45.6 | 91.2 | 136.8 | 228.0 | 380.0 | 683.9 |
| 150 | 15.8 | 41.3 | 82.6 | 123.9 | 206.5 | 344.2 | 619.6 |
| 200 | 14.8 | 38.5 | 77.0 | 115.4 | 192.4 | 320.7 | 577.2 |
| 250 | 13.9 | 36.3 | 72.5 | 108.8 | 181.3 | 302.2 | 543.9 |
| 300 | 13.2 | 34.5 | 69.0 | 103.5 | 172.5 | 287.5 | 517.5 |
| 325 | 12.9 | 33.7 | 67.5 | 101.2 | 168.7 | 281.1 | 506.0 |
| 350 | 12.7 | 33.1 | 66.1 | 99.2 | 165.3 | 275.5 | 496.0 |
| 375 | 12.4 | 32.4 | 64.8 | 97.2 | 162.0 | 270.0 | 486.0 |
| 400 | 12.2 | 31.7 | 63.5 | 95.2 | 158.7 | 264.5 | 476.1 |
| 425 | 12.0 | 31.2 | 62.5 | 93.7 | 156.2 | 260.4 | 468.7 |
| 450 | 11.7 | 30.6 | 61.2 | 91.8 | 153.0 | 254.9 | 458.9 |
| 475 | 11.5 | 30.1 | 60.1 | 90.2 | 150.3 | 250.5 | 450.9 |
| 500 | 113 | 29.6 | 59.1 | 88.7 | 147.8 | 246.4 | 443.5 |
| 538 | 11.0 | 28.6 | 57.3 | 85.9 | 143.1 | 238.5 | 429.4 |
| S50 | 10.9 | 28.4 | 56.8 | 85.1 | 141.9 | 236.5 | 425.7 |
| 575 | 10.0 | 26.1 | 52.1 | 78.2 | 130.3 | 217.2 | 390.9 |
| 600 | 8.1 | 21.1 | 42.2 | 63.3 | 105.5 | 175.8 | 316.5 |
| 625 | 6.6 | 17.2 | 34.5 | 51.7 | 86.2 | 143.6 | 258.5 |
| 650 | 5.4 | 14.1 | 28.2 | 42.2 | 70.4 | 117.3 | 211.2 |
| 675 | 4.5 | 11.7 | 23.4 | 35.1 | 58.4 | 97.4 | 175.3 |
| 700 | 4.1 | 10.7 | 21.3 | 32.0 | 53.3 | 88.9 | 160.0 |
| 725 | 3.5 | 9.2 | 18.5 | 27.7 | 46.2 | 77.0 | 138.6 |
| 750 | 1.4 (5) | 5.9 | 11.7 | 17.6 | 29.3 | 48.9 | 87.9 |
| 775 | 1.4 (5) | 4.6 | 9.0 | 13.7 | 22.8 | 38.0 | 68.4 |
| 800 | 1.2 (5) | 3.5 | 70 | 10.5 | 17.4 | 29.2 | 52.6 |
| 816 | 1.0 (5) | 2.8 | 5.9 | 8.6 | 14.1 | 23.8 | 42.7 |
NOTES:
(1) A182 Gr. F304, A351 Gr. CF3 - At temperatures above 538°C, use only when the carbon content is 0.04% or higher.
(2) Not to be used over 425°C.
(3) Flanged-end valve ratings terminate at 538°C.
More information for ball valve selection guide.
