24 OD Line Pipe
24" OD Line Pipe

API 5L – Grade B

Wall Thickness
(in.)
Standard Mill
Test Pressure1
(psi)
Alternate Mill
Test Pressure
(psi)
Internal Pressure
Minimum Yield
(psi)
Class Location 1 (.72)
(psi)
Class Location 2 (.60)
(psi)
Class Location 3 (.50)
(psi)
Class Location 4 (.40)
(psi)
0.250 444 555 740 533 444 370 296
0.281 499 623 831 599 499 416 333
0.312 554 692 923 665 554 462 369
0.344 611 763 1018 733 611 509 407
0.375 666 832 1109 799 666 555 444
0.406 721 901 1201 865 721 601 480
0.438 777 972 1296 933 777 648 518
0.469 832 1041 1387 999 832 694 555
0.500 888 1109 1479 1065 888 740 592
0.562 998 1247 1663 1197 998 831 665
0.625 1109 1387 1849 1331 1109 924 740

API 5L – Grade X-42

Wall Thickness
(in.)
Standard Mill
Test Pressure1
(psi)
Internal Pressure
Minimum Yield
(psi)
Class Location 1 (.72)
(psi)
Class Location 2 (.60)
(psi)
Class Location 3 (.50)
(psi)
Class Location 4 (.40)
(psi)
0.250 789 877 632 526 439 351
0.281 887 986 710 592 493 394
0.312 985 1095 788 657 547 438
0.344 1086 1207 869 724 603 483
0.375 1184 1316 947 789 658 526
0.406 1282 1424 1026 855 712 570
0.438 1383 1537 1106 922 768 615
0.469 1481 1645 1185 987 823 658
0.500 1579 1754 1263 1053 877 702
0.562 1775 1972 1420 1183 986 789
0.625 1973 2193 1579 1316 1096 877

API 5L – Grade X-52

Wall Thickness
(in.)
Standard Mill
Test Pressure1
(psi)
Internal Pressure
Minimum Yield
(psi)
Class Location 1 (.72)
(psi)
Class Location 2 (.60)
(psi)
Class Location 3 (.50)
(psi)
Class Location 4 (.40)
(psi)
0.250 979 1088 783 653 544 435
0.281 1100 1222 880 733 611 489
0.312 1221 1357 977 814 679 543
0.344 1347 1496 1077 898 748 599
0.375 1468 1631 1175 979 816 653
0.406 1589 1766 1272 1060 883 706
0.438 1715 1905 1372 1143 953 762
0.469 1836 2040 1469 1224 1020 816
0.500 1958 2175 1566 1305 1088 870
0.562 2200 2445 1760 1467 1222 978
0.625 2447 2719 1958 1631 1359 1088

API 5L – Grade X-56

Wall Thickness
(in.)
Standard Mill
Test Pressure1
(psi)
Internal Pressure
Minimum Yield
(psi)
Class Location 1 (.72)
(psi)
Class Location 2 (.60)
(psi)
Class Location 3 (.50)
(psi)
Class Location 4 (.40)
(psi)
0.250 1061 1179 849 708 590 472
0.281 1193 1325 954 795 663 530
0.312 1324 1472 1060 883 736 589
0.344 1460 1623 1168 974 811 649
0.375 1592 1769 1274 1061 884 708
0.406 1723 1915 1379 1149 957 766
0.438 1859 2066 1487 1240 1033 826
0.469 1991 2212 1593 1327 1106 885
0.500 2123 2358 1698 1415 1179 943
0.562 2386 2651 1909 1590 1325 1060
0.625 2653 2948 2123 1769 1474 1179

API 5L – Grade X-60

Wall Thickness
(in.)
Standard Mill
Test Pressure1
(psi)
Internal Pressure
Minimum Yield
(psi)
Class Location 1 (.72)
(psi)
Class Location 2 (.60)
(psi)
Class Location 3 (.50)
(psi)
Class Location 4 (.40)
(psi)
0.250 1129 1254 903 753 627 502
0.281 1269 1410 1015 846 705 564
0.312 1409 1565 1127 939 783 626
0.344 1553 1726 1243 1035 863 690
0.375 1693 1881 1355 1129 941 753
0.406 1833 2037 1466 1222 1018 815
0.438 1978 2197 1582 1318 1099 879
0.469 2118 2353 1694 1412 1176 941
0.500 2258 2508 180 1505 1254 1003
0.562 2537 2819 2030 1692 1410 1128
0.625 2822 3135 2258 1881 1568 1254

API 5L – Grade X-65

Wall Thickness
(in.)
Standard Mill
Test Pressure1
(psi)
Internal Pressure
Minimum Yield
(psi)
Class Location 1 (.72)
(psi)
Class Location 2 (.60)
(psi)
Class Location 3 (.50)
(psi)
Class Location 4 (.40)
(psi)
0.250 1224 1360 980 816 680 544
0.281 1376 1529 1101 917 765 612
0.312 1528 1698 1222 1019 849 679
0.344 1685 1872 1348 1123 936 749
0.375 1837 2041 1469 1224 1020 816
0.406 1988 2209 1591 1326 1105 884
0.438 2145 2383 1716 1430 1192 953
0.469 2297 2552 1838 1531 1276 1021
0.500 2449 2721 1959 1633 1360 1088
0.562 2752 3058 2202 1835 1529 1223
0.625 3061 3401 2449 2041 1701 1360

API 5L – Grade X-70

Wall Thickness
(in.)
Standard Mill
Test Pressure1
(psi)
Internal Pressure
Minimum Yield
(psi)
Class Location 1 (.72)
(psi)
Class Location 2 (.60)
(psi)
Class Location 3 (.50)
(psi)
Class Location 4 (.40)
(psi)
0.250 1318 1465 1055 879 732 586
0.281 1482 1646 1185 988 823 658
0.312 1645 1828 1316 1097 914 731
0.344 1814 2015 1451 1209 1008 806
0.375 1977 2197 1582 1318 1098 879
0.406 2141 2378 1713 1427 1189 951
0.438 2309 2566 1847 1540 1283 1026
0.469 2473 2748 1978 1649 1374 1099
0.500 2636 2929 2109 1758 1465 1172
0.562 2963 3292 2371 1975 1646 1317
0.625 3295 3661 2636 2197 1831 1465

API 5L – Grade X-80

Wall Thickness
(in.)
Standard Mill
Test Pressure1
(psi)
Internal Pressure
Minimum Yield
(psi)
Class Location 1 (.72)
(psi)
Class Location 2 (.60)
(psi)
Class Location 3 (.50)
(psi)
Class Location 4 (.40)
(psi)
0.250 1509 1677 1208 1006 839 671
0.281 1697 1885 1357 1131 943 754
0.312 1884 2093 1507 1256 1047 837
0.344 2077 2308 1662 1385 1154 923
0.375 2264 2516 1811 1509 1258 1006
0.406 2451 2724 1961 1634 1362 1089
0.438 2644 2938 2116 1763 1469 1175
0.469 2832 3146 2265 1888 1573 1258
0.500 3019 3354 2415 2013 1677 1342
0.562 3393 3770 2714 2262 1885 1508
0.625 3773 4193 3019 2516 2096 1677

1 Mill test pressure is limited to 3000 psi in the 20" mill and 5000 psi in the 24" mill.

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