PIPE, FITTING & FLANGE SPECIFICATIONS
MAXIMUM ALLOWABLE WORKING PRESSURES (PSIG) FOR SEAMLESS CARBON STEEL PIPE Nominal Maximum allowable working pressure at -20 to 650 ˚F Pipe Size (in.) SCH 10 SCH 20 SCH 30 STD WALL SCH 40 SCH 60
XH SCH 80 SCH 100 SCH 120 SCH 140 SCH 160 XXH
1/2 3/4
-
- - - - - - - - - - - -
- - - - - - - - - - - -
1694 1450 1578 1069 1004
1694 1450 1578 1069 1004
- - - - - - - - - - - -
3036 3036
- - - - - - - - - - - -
- - - - - - - - -
- - - - - - - - - - - -
4551
9223
659
2589 2601 1941 1821 1659 1936
2589 2601 1941 1821 1659 1936
4505 7531 4290 7150 3001 5593 3091 5114
1
1065
1 1 / 4 1 1 / 2
556 486 388 431 346 303 269 284 239 225 224 219 333 291 258 233 211 194
2
903
903
3225
4475
2 1 / 2
1214 1094 1023
1214 1094 1023
2963 4936
3
1773 1773
2933
4405
3 1 / 2
1671 1598 1475 1473 1343 1070
1671 1598 1475 1473 1649 1311 1305 1311 1305 1303 1299
-
-
4 5 6 8
974 888 833 770 723 630 573 500 444 399 363 331 306 265 220 189
974 888 833
2243 2123 2038
2868 2791 2738 2605 2754 2735 2675 2669 2665 2663
3858 3485 3414
543 434 366 451 395 350 399
628 578 534 573 500 538 568
1038
1343 1070 1033
2068 2388 1641 1975
2715 2406 2295 2341 2378 2303 2338
- - - - - - - - - - - - -
10 12 14 16 18 20 22 24 26 30 36 42
723 696 693 711 725 693
898 816 711 631 568 515 471 435 376 314 269
1653
2009
999 980
1690 2013 1638 1975
1013
1648
1998
995
1653 1970
-
-
-
-
-
-
-
-
-
331
541
683
1004
1295
1664
2003
2309
2656
-
-
-
- - - -
- - - -
- - - -
- - - -
- - - -
- - - -
- - - -
209
376
488
- -
- -
- -
For allowable working pressures at higher temperatures, multiply values listed above by the following factors :
Grade A Temperature 700 ˚F
Grade B Temperature Multiply by
750 ˚F
800 ˚F 850 ˚F
900 ˚F 0.417
700 ˚F 0.956
750 ˚F 0.853
800 ˚F 850 ˚F
900 ˚F 0.333
Multiply by
0.971 0.892
0.750
0.708
0.720
0.620
61
Tel: 610-495-5131 • Pottstown PA • USA •• www.watsonmcdaniel.com
Made with FlippingBook - Online magazine maker