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Carbon Steel Pipes - Pressure and Temperature Ratings, Imperial Units

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Ratings calculated (see below the table) according ASME B31.3-2002 Table K-1 for plain end standard seamless carbon steel pipes and tubes spec. no. A-53 B, A-106 B, A333, A334 and API 5L. Temperatures ranging 100 oF - 700 oF.

Specified min. tensile strength 60 ksi (60000 psi).

For full table with Pipe and Water Weight - rotate the screen!

Carbon Steel Pipes - Pressure and Temperature Ratings - Imperial Units
Size
(in)
Outside
Diameter
(in)
Wall
Thickness
(in)
Inside
Diameter
(in)
ScheduleTemperature (oF)
100200300400500600650700
Allowable Stress (psi)
2000020000200002000018900173001700016500
1/2 0.840 0.109 0.622 40 4995 4995 4995 4995 4721 4321 4246 4121
0.840 0.147 0.546 80 6980 6980 6980 6980 6596 6038 5933 5759
0.840 0.188 0.464 160 9289 9289 9289 9289 8778 8035 7895 7663
0.840 0.294 0.252 16225 16225 16225 16225 15333 14035 13791 13386
3/4 1.050 0.113 0.824 40 4074 4074 4074 4074 3849 3524 3463 3361
1.050 0.154 0.742 80 5721 5721 5721 5721 5406 4948 4863 4720
1.050 0.219 0.612 160 8548 8548 8548 8548 8078 7394 7266 7052
1.050 0.308 0.434 12919 12919 12919 12919 12209 11175 10982 10659
1 1.315 0.133 1.049 40 3810 3810 3810 3810 3600 3295 3238 3143
1.315 0.179 0.957 80 5266 5266 5266 5266 4976 4555 4476 4344
1.315 0.25 0.815 160 7675 7675 7675 7675 7253 6639 6524 6332
1.315 0.358 0.599 11772 11772 11772 11772 11124 10183 10006 9712
1 1/4 1.660 0.14 1.38 40 3137 3137 3137 3137 2964 2714 2666 2588
1.660 0.191 1.278 80 4380 4380 4380 4380 4139 3789 3723 3613
1.660 0.25 1.16 160 5892 5892 5892 5892 5568 5097 5008 4861
1.660 0.382 0.896 9601 9601 9601 9601 9073 8305 8161 7921
1 1/2 1.900 0.145 1.61 40 2822 2822 2822 2822 2667 2441 2399 2328
1.900 0.2 1.5 80 3977 3977 3977 3977 3759 3440 3381 3281
1.900 0.281 1.338 160 5774 5774 5774 5774 5457 4995 4908 4764
1.900 0.4 1.1 8642 8642 8642 8642 8167 7475 7346 7130
2 2.375 0.109 2.157 10 1660 1660 1660 1660 1568 1436 1411 1369
2.375 0.154 2.067 40 2377 2377 2377 2377 2247 2056 2021 1961
2.375 0.218 1.939 80 3433 3433 3433 3433 3244 2970 2918 2832
2.375 0.25 1.875 3977 3977 3977 3977 3759 3440 3381 3281
2.375 0.281 1.813 4515 4515 4515 4515 4267 3905 3838 3725
2.375 0.344 1.687 160 5641 5641 5641 5641 5331 4880 4795 4654
2.375 0.436 1.503 7373 7373 7373 7373 6967 6377 6267 6082
2 1/2 2.875 0.12 2.635 10 1505 1505 1505 1505 1422 1302 1279 1241
2.875 0.203 2.469 40 2600 2600 2600 2600 2457 2249 2210 2145
2.875 0.216 2.443 2776 2776 2776 2776 2623 2401 2359 2290
2.875 0.25 2.375 3241 3241 3241 3241 3063 2803 2755 2674
2.875 0.276 2.323 80 3602 3602 3602 3602 3404 3116 3062 2972
2.875 0.375 2.125 160 5024 5024 5024 5024 4748 4346 4270 4145
2.875 0.552 1.771 7763 7763 7763 7763 7336 6715 6599 6405
3 3.500 0.12 3.26 1230 1230 1230 1230 1162 1064 1045 1014
3.500 0.156 3.188 1610 1610 1610 1610 1522 1393 1369 1328
3.500 0.172 3.156 1781 1781 1781 1781 1683 1541 1514 1470
3.500 0.188 3.124 1953 1953 1953 1953 1846 1690 1660 1612
3.500 0.216 3.068 40 2258 2258 2258 2258 2133 1953 1919 1862
3.500 0.25 3 2632 2632 2632 2632 2487 2276 2237 2171
3.500 0.281 2.938 2977 2977 2977 2977 2814 2575 2531 2456
3.500 0.3 2.9 80 3191 3191 3191 3191 3016 2761 2713 2633
3.500 0.438 2.624 160 4801 4801 4801 4801 4536 4152 4080 3960
3.500 0.6 2.3 6818 6818 6818 6818 6443 5898 5795 5625
3 1/2 4.000 0.12 3.76 10 1073 1073 1073 1073 1014 928 912 885
4.000 0.226 3.548 140 2059 2059 2059 2059 1946 1781 1750 1699
4.000 0.25 3.5 2288 2288 2288 2288 2162 1979 1944 1887
4.000 0.281 3.438 2586 2586 2586 2586 2444 2237 2198 2133
4.000 0.318 3.364 80 2946 2946 2946 2946 2784 2549 2505 2431
4.000 0.636 2.728 6262 6262 6262 6262 5918 5417 5323 5166
4 4.500 0.12 4.26 10 951 951 951 951 899 823 808 785
4.500 0.156 4.188 1244 1244 1244 1244 1175 1076 1057 1026
4.500 0.188 4.124 1506 1506 1506 1506 1423 1303 1280 1243
4.500 0.203 4.094 1630 1630 1630 1630 1541 1410 1386 1345
4.500 0.219 4.062 1763 1763 1763 1763 1666 1525 1499 1455
4.500 0.237 4.026 40 1914 1914 1914 1914 1809 1656 1627 1579
4.500 0.25 4 2023 2023 2023 2023 1912 1750 1720 1669
4.500 0.281 3.938 60 2285 2285 2285 2285 2160 1977 1943 1886
4.500 0.312 3.876 2550 2550 2550 2550 2410 2206 2168 2104
4.500 0.337 3.826 80 2766 2766 2766 2766 2614 2393 2351 2282
4.500 0.438 3.624 120 3656 3656 3656 3656 3455 3162 3107 3016
4.500 0.531 3.438 160 4502 4502 4502 4502 4254 3894 3827 3714
4.500 0.674 3.152 5856 5856 5856 5856 5534 5066 4978 4831
5 5.563 0.188 5.187 1211 1211 1211 1211 1145 1048 1030 999
5.563 0.219 5.125 1417 1417 1417 1417 1339 1226 1204 1169
5.563 0.258 5.047 40 1678 1678 1678 1678 1585 1451 1426 1384
5.563 0.281 5.001 1833 1833 1833 1833 1732 1585 1558 1512
5.563 0.312 4.939 2043 2043 2043 2043 1931 1767 1737 1686
5.563 0.344 4.875 2262 2262 2262 2262 2138 1957 1923 1866
5.563 0.375 4.813 80 2476 2476 2476 2476 2340 2142 2105 2043
5.563 0.5 4.563 120 3357 3357 3357 3357 3172 2904 2853 2770
5.563 0.625 4.313 160 4268 4268 4268 4268 4033 3692 3628 3521
5.563 0.75 4.063 5210 5210 5210 5210 4924 4507 4429 4299
6 6.625 0.109 6.407 5 583 583 583 583 551 504 495 481
6.625 0.134 6.357 10 718 718 718 718 679 621 610 592
6.625 0.156 6.313 838 838 838 838 792 725 712 691
6.625 0.188 6.249 1013 1013 1013 1013 958 877 861 836
6.625 0.203 6.219 1096 1096 1096 1096 1036 948 932 904
6.625 0.219 6.187 1184 1184 1184 1184 1119 1024 1007 977
6.625 0.25 6.125 1357 1357 1357 1357 1282 1173 1153 1119
6.625 0.28 6.065 40 1524 1524 1524 1524 1441 1319 1296 1258
6.625 0.312 6.001 1704 1704 1704 1704 1611 1474 1449 1406
6.625 0.344 5.937 1886 1886 1886 1886 1782 1631 1603 1556
6.625 0.375 5.875 2063 2063 2063 2063 1949 1784 1753 1702
6.625 0.432 5.761 80 2391 2391 2391 2391 2260 2069 2033 1973
6.625 0.5 5.625 2789 2789 2789 2789 2635 2412 2371 2301
6.625 0.562 5.501 120 3156 3156 3156 3156 2983 2730 2683 2604
6.625 0.625 5.375 3535 3535 3535 3535 3341 3058 3005 2917
6.625 0.719 5.187 160 4111 4111 4111 4111 3885 3556 3494 3391
6.625 0.864 4.897 5023 5023 5023 5023 4747 4345 4270 4144
6.625 1 4.625 5907 5907 5907 5907 5582 5110 5021 4873
6.625 1.125 4.375 6745 6745 6745 6745 6374 5835 5733 5565
8 8.625 0.188 8.25 775 775 775 775 732 670 659 639
8.625 0.203 8.219 838 838 838 838 792 724 712 691
8.625 0.219 8.187 905 905 905 905 855 783 769 746
8.625 0.237 8.151 981 981 981 981 927 848 834 809
8.625 0.25 8.125 20 1036 1036 1036 1036 979 896 880 854
8.625 0.277 8.071 30 1150 1150 1150 1150 1087 995 977 949
8.625 0.312 8.001 1299 1299 1299 1299 1228 1124 1104 1072
8.625 0.322 7.981 40 1342 1342 1342 1342 1268 1161 1140 1107
8.625 0.344 7.937 1436 1436 1436 1436 1357 1242 1221 1185
8.625 0.375 7.875 1570 1570 1570 1570 1483 1358 1334 1295
8.625 0.406 7.813 60 1704 1704 1704 1704 1610 1474 1448 1406
8.625 0.438 7.749 1843 1843 1843 1843 1742 1594 1566 1520
8.625 0.5 7.625 80 2115 2115 2115 2115 1998 1829 1798 1745
8.625 0.562 7.501 2390 2390 2390 2390 2258 2067 2031 1971
8.625 0.594 7.437 100 2533 2533 2533 2533 2393 2191 2153 2089
8.625 0.625 7.375 2672 2672 2672 2672 2525 2311 2271 2204
8.625 0.719 7.187 120 3098 3098 3098 3098 2928 2680 2634 2556
8.625 0.812 7.001 140 3528 3528 3528 3528 3334 3051 2998 2910
8.625 0.875 6.875 3822 3822 3822 3822 3612 3306 3249 3153
8.625 0.906 6.813 160 3968 3968 3968 3968 3750 3433 3373 3274
10 10.75 0.188 10.374 620 620 620 620 586 536 527 511
10.75 0.203 10.374 670 670 670 670 633 579 569 553
10.75 0.219 10.312 723 723 723 723 684 626 615 597
10.75 0.237 10.276 784 784 784 784 741 678 666 647
10.75 0.25 10.25 20 827 827 827 827 782 716 703 683
10.75 0.279 10.192 925 925 925 925 874 800 786 763
10.75 0.307 10.136 30 1020 1020 1020 1020 964 882 867 841
10.75 0.344 10.062 1146 1146 1146 1146 1083 991 974 945
10.75 0.365 10.02 40 1217 1217 1217 1217 1150 1053 1035 1004
10.75 0.375 10 1251 1251 1251 1251 1183 1083 1064 1032
10.75 0.438 9.874 1468 1468 1468 1468 1387 1270 1248 1211
10.75 0.5 9.75 60 1683 1683 1683 1683 1590 1456 1430 1388
10.75 0.562 9.626 1899 1899 1899 1899 1795 1643 1614 1567
10.75 0.594 9.562 80 2012 2012 2012 2012 1901 1740 1710 1660
10.75 0.625 9.5 2121 2121 2121 2121 2005 1835 1803 1750
10.75 0.719 9.312 100 2456 2456 2456 2456 2321 2124 2088 2026
10.75 0.812 9.126 2791 2791 2791 2791 2638 2414 2373 2303
10.75 0.844 9.062 120 2908 2908 2908 2908 2748 2515 2472 2399
10.75 1 8.75 140 3483 3483 3483 3483 3291 3012 2960 2873
10.75 1.125 8.5 160 3952 3952 3952 3952 3735 3419 3359 3261
12 12.75 0.188 12.374 521 521 521 521 493 451 443 430
12.75 0.203 12.374 564 564 564 564 533 487 479 465
12.75 0.219 12.312 608 608 608 608 575 526 517 502
12.75 0.237 12.276 659 659 659 659 623 570 560 544
12.75 0.25 12.25 20 696 696 696 696 658 602 591 574
12.75 0.281 12.188 783 783 783 783 740 678 666 646
12.75 0.312 12.126 871 871 871 871 823 754 741 719
12.75 0.33 12.09 30 923 923 923 923 872 798 784 761
12.75 0.344 12.062 962 962 962 962 910 833 818 794
12.75 0.375 12 1051 1051 1051 1051 993 909 893 867
12.75 0.406 11.938 40 1140 1140 1140 1140 1077 986 969 940
12.75 0.438 11.874 1232 1232 1232 1232 1164 1066 1047 1016
12.75 0.5 11.75 1411 1411 1411 1411 1334 1221 1200 1164
12.75 0.562 11.626 60 1592 1592 1592 1592 1504 1377 1353 1313
12.75 0.625 11.5 1777 1777 1777 1777 1679 1537 1510 1466
12.75 0.688 11.374 80 1963 1963 1963 1963 1855 1698 1668 1619
12.75 0.75 11.25 2147 2147 2147 2147 2029 1857 1825 1771
12.75 0.844 11.062 100 2429 2429 2429 2429 2296 2101 2065 2004
12.75 1 10.75 120 2905 2905 2905 2905 2745 2512 2469 2396
12.75 1.125 10.5 140 3292 3292 3292 3292 3111 2847 2798 2716
12.75 1.312 10.126 160 3881 3881 3881 3881 3668 3357 3299 3202
14 14.00 0.25 13.5 10 633 633 633 633 598 547 538 522
14.00 0.281 13.438 713 713 713 713 673 616 606 588
14.00 0.312 13.376 20 792 792 792 792 749 685 674 654
14.00 0.344 13.312 875 875 875 875 827 757 744 722
14.00 0.375 13.25 30 955 955 955 955 903 826 812 788
14.00 0.406 13.188 1036 1036 1036 1036 979 896 881 855
14.00 0.438 13.124 40 1120 1120 1120 1120 1058 968 952 924
14.00 0.459 13.082 1174 1174 1174 1174 1110 1016 998 969
14.00 0.5 13 1282 1282 1282 1282 1212 1109 1090 1058
14.00 0.562 12.876 1446 1446 1446 1446 1366 1250 1229 1193
14.00 0.594 12.812 60 1530 1530 1530 1530 1446 1324 1301 1263
14.00 0.625 12.75 1613 1613 1613 1613 1524 1395 1371 1331
14.00 0.688 12.624 1781 1781 1781 1781 1683 1541 1514 1470
14.00 0.75 12.5 80 1948 1948 1948 1948 1841 1685 1656 1607
14.00 0.812 12.376 2116 2116 2116 2116 2000 1830 1799 1746
14.00 0.938 12.124 100 2460 2460 2460 2460 2325 2128 2091 2030
14.00 1.094 11.812 120 2893 2893 2893 2893 2734 2503 2459 2387
14.00 1.25 11.5 14O 3333 3333 3333 3333 3150 2883 2833 2750
14.00 1.406 11.188 160 3781 3781 3781 3781 3573 3270 3214 3119
16 16.00 0.188 15.624 415 415 415 415 392 359 352 342
16.00 0.203 15.594 448 448 448 448 423 388 381 370
16.00 0.219 15.562 484 484 484 484 457 418 411 399
16.00 0.237 15.526 524 524 524 524 495 453 445 432
16.00 0.25 15.5 10 553 553 553 553 523 478 470 456
16.00 0.281 15.438 622 622 622 622 588 538 529 513
16.00 0.312 15.376 20 692 692 692 692 654 599 588 571
16.00 0.344 15.312 764 764 764 764 722 661 649 630
16.00 0.375 15.25 30 834 834 834 834 788 721 709 688
16.00 0.406 15.188 904 904 904 904 854 782 769 746
16.00 0.438 15.124 977 977 977 977 923 845 830 806
16.00 0.469 15.062 1047 1047 1047 1047 990 906 890 864
16.00 0.5 15 40 1118 1118 1118 1118 1057 967 950 923
16.00 0.562 14.876 1260 1260 1260 1260 1191 1090 1071 1040
16.00 0.625 14.75 1406 1406 1406 1406 1328 1216 1195 1160
16.00 0.656 14.688 60 1477 1477 1477 1477 1396 1278 1256 1219
16.00 0.688 14.624 1552 1552 1552 1552 1466 1342 1319 1280
16.00 0.75 14.5 1696 1696 1696 1696 1603 1467 1442 1399
16.00 0.812 14.376 80 1842 1842 1842 1842 1740 1593 1565 1519
16.00 1.031 13.938 100 2362 2362 2362 2362 2232 2043 2008 1949
16.00 1.219 13.562 120 2817 2817 2817 2817 2662 2437 2394 2324
16.00 1.438 13.124 140 3357 3357 3357 3357 3172 2904 2853 2769
16.00 1.594 12.812 160 3748 3748 3748 3748 3542 3242 3186 3092
18 18.00 0.219 17.562 429 429 429 429 406 372 365 354
18.00 0.237 17.526 465 465 465 465 440 402 395 384
18.00 0.25 17.5 491 491 491 491 464 425 417 405
18.00 0.281 17.438 552 552 552 552 522 478 470 456
18.00 0.312 17.376 20 614 614 614 614 580 531 522 507
18.00 0.344 17.312 678 678 678 678 641 586 576 559
18.00 0.375 17.25 740 740 740 740 699 640 629 610
18.00 0.406 17.188 802 802 802 802 758 694 682 662
18.00 0.438 17.124 30 866 866 866 866 819 749 736 715
18.00 0.469 17.062 929 929 929 929 878 803 790 766
18.00 0.5 17 992 992 992 992 937 858 843 818
18.00 0.562 16.876 40 1117 1117 1117 1117 1056 966 950 922
18.00 0.625 16.75 1246 1246 1246 1246 1177 1077 1059 1028
18.00 0.688 16.624 60 1375 1375 1375 1375 1299 1189 1168 1134
18.00 0.75 16.5 1502 1502 1502 1502 1420 1299 1277 1239
18.00 0.812 16.376 1630 1630 1630 1630 1541 1410 1386 1345
18.00 0.938 16.124 80 1893 1893 1893 1893 1789 1637 1609 1562
18.00 1.156 15.688 100 2354 2354 2354 2354 2224 2036 2001 1942
18.00 1.275 15.25 120 2609 2609 2609 2609 2465 2256 2217 2152
18.00 1.562 14.876 140 3234 3234 3234 3234 3056 2797 2749 2668
18.00 1.781 14.438 160 3721 3721 3721 3721 3516 3218 3163 3070

1) STD (standard) = schedule 40

2) XS (extra strong) = schedule 80

Allowable Pressure Equation

The calculations of allowable pressure in the table above are made with the ANSI/ASME Piping Code B31.1 equation:

P = 2 SE (tm - A) / (Do - 2 y (tm - A))                        (1)

where

P = allowable pressure (psi)

SE = maximum allowable stress in pipe wall (psi)

tm = wall thickness (in) Note! -12.5% manufacturing tolerance on wall thickness are used in the calculations above.

A = additional thickness depending of type of pipe (in) (A = 0 in for the calculations above)

y = a coefficient depending on material and temperature range (y = 0.4 for the calculations above)

Do = outside diameter (in)

Example - Calculating Allowable Pressure for a Steel Pipe

The allowable pressure for a 4 inch schedule 40 pipe at temperature 100oF and allowable stress 20000 psi can be calculated as

P = 2 (20000 psi) ((1 - 0.125) (0.237 in) - (0 in)) / ((4.5 in) - 2 (0.4) ((1 - 0.125) (0.237 in) - (0 in))) 

   = 1914 psi   

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