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Stainless Steel Pipes - Allowable Pressure

Allowable pressure for standard seamless A312-TP316/316L stainless steel pipes - temperatures 100oF to 750oF

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Ratings for standard seamless stainless steel pipes, temperatures ranging 100oF to 750oF. All ratings in psig based on ANSI/ASME B 31.1.

Pressure Rating (psig)
Pipe Size
(inches)
Pipe ScheduleOutside
Diameter
(in)
Wall
Thickness
(in)
Temperature (oF)
100200300400500600650700750
Allowable Stress (psi)
167001670016700155001440013500132001290012600
1" 40 1.315 0.133 2205 2205 2205 2047 1902 1783 1743 1703 1664
80 1.315 0.179 3061 3061 3061 2841 2640 2475 2420 2365 2310
160 1.315 0.250 4493 4493 4493 4170 3874 3632 3552 3471 3390
1 1/2" 40 1.900 0.145 1629 1629 1629 1512 1404 1317 1287 1258 1229
80 1.900 0.200 2303 2303 2303 2138 1986 1862 1821 1779 1738
160 1.900 0.281 3362 3362 3362 3120 2899 2717 2657 2597 2536
2" 40 2.375 0.154 1371 1371 1371 1272 1182 1108 1083 1059 1034
80 2.375 0.218 1985 1985 1985 1843 1712 1605 1569 1534 1498
160 2.375 0.344 3283 3283 3283 3047 2831 2654 2595 2536 2477
3" 40 3.500 0.216 1301 1301 1301 1208 1122 1052 1028 1005 982
80 3.500 0.300 1844 1844 1844 1712 1590 1491 1458 1425 1391
160 3.500 0.438 2787 2787 2787 2587 2403 2253 2203 2153 2103
4" 40 4.500 0.237 1102 1102 1102 1023 950 891 871 851 831
80 4.500 0.337 1596 1596 1596 1482 1377 1291 1262 1233 1204
160 4.500 0.531 2611 2611 2611 2424 2552 2111 2064 2017 1970
5" 40 5.563 0.258 965 965 965 896 832 780 763 746 728
80 5.563 0.375 1428 1428 1428 1325 1231 1154 1129 1103 1077
160 5.563 0.625 2474 2474 2474 2296 2133 2000 1955 1911 1866
6" 40 6.625 0.280 877 877 877 814 756 709 693 677 661
80 6.625 0.432 1379 1379 1379 1280 1189 1115 1090 1065 1040
160 6.625 0.719 2382 2382 2382 2211 2054 1925 1883 1840 1797
8" 40 8.625 0.322 771 771 771 716 665 623 610 596 582
80 8.625 0.500 1218 1218 1218 1131 1050 985 963 941 919
160 8.625 0.906 2298 2298 2298 2133 1982 1858 1817 1775 1734
10" 40 10.750 0.365 699 699 699 649 603 565 553 540 528
80 10.750 0.594 1159 1159 1159 1075 999 937 916 895 874
160 10.750 1.125 2289 2289 2289 2124 1974 1850 1809 1768 1727
  • 1 psi (lb/in2) =  6,894.8 Pa (N/m2) = 6.895x10-2 bar

Allowable pressure is calculated with the ASME 31.3 Allowable Pressure Equation with quality factor E = 0.6 and wall thickness coefficient Y = 0.4.

Example - Allowable Pressure Calculation

Allowable pressure for a 4" sch. 40 stainless steel pipe with temperature 100oF, allowable stress 16700 psi, quality factor E = 0.6 and wall thickness coefficient Y = 0.4 - can be calculated with ASME 31.3 Allowable Pressure Equation 1b 

p = 2 (0.237 in) (16700 psi) (0.6) / ((4.5 in) - 2 (0.237) 0.4)

   = 1102 psi      

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