B622 N10276 Pipe MAWP Calculator ASTM B622 N10276 (C276) Pipe SMLS 54Ni-16Mo-15Cr, Sol. Ann.
Material Properties Description
ASTM B622 N10276 (C276) Pipe SMLS 54Ni-16Mo-15Cr, Sol. Ann.
Min Design Temperature
-325 °F
Y Coefficient
Ref 5 — Other ductile metals
Maximum Allowable Working Pressure (psig) Sch STD Sch XS Sch 160
NPS OD (in) 100 °F 200 °F 300 °F 400 °F 500 °F 600 °F 700 °F 800 °F 1/8 0.405 9,090 9,090 9,090 9,090 8,957 8,391 7,991 7,691 1/4 0.54 8,788 8,788 8,788 8,788 8,659 8,112 7,726 7,436 3/8 0.675 7,112 7,112 7,112 7,112 7,008 6,565 6,252 6,018 1/2 0.84 6,819 6,819 6,819 6,819 6,719 6,294 5,995 5,770 3/4 1.05 5,560 5,560 5,560 5,560 5,479 5,133 4,888 4,705 1 1.315 5,200 5,200 5,200 5,200 5,124 4,800 4,572 4,400 1 1/4 1.66 4,282 4,282 4,282 4,282 4,219 3,953 3,764 3,623 1 1/2 1.9 3,852 3,852 3,852 3,852 3,795 3,555 3,386 3,259 2 2.375 3,245 3,245 3,245 3,245 3,198 2,996 2,853 2,746 2 1/2 2.875 3,549 3,549 3,549 3,549 3,497 3,276 3,120 3,003 3 3.5 3,082 3,082 3,082 3,082 3,036 2,844 2,709 2,607 3.5 4 2,810 2,810 2,810 2,810 2,769 2,594 2,471 2,378 4 4.5 2,612 2,612 2,612 2,612 2,574 2,412 2,297 2,211 5 5.563 2,290 2,290 2,290 2,290 2,256 2,114 2,013 1,938 6 6.625 2,081 2,081 2,081 2,081 2,050 1,921 1,829 1,761 7 7.625 1,940 1,940 1,940 1,940 1,911 1,790 1,705 1,641 8 8.625 1,831 1,831 1,831 1,831 1,805 1,691 1,610 1,550 9 9.625 1,741 1,741 1,741 1,741 1,715 1,607 1,530 1,473 10 10.75 1,662 1,662 1,662 1,662 1,637 1,534 1,461 1,406 12 12.75 1,435 1,435 1,435 1,435 1,414 1,324 1,261 1,214 14 14 1,304 1,304 1,304 1,304 1,285 1,204 1,146 1,104 16 16 1,138 1,138 1,138 1,138 1,122 1,051 1,001 963 18 18 1,010 1,010 1,010 1,010 995 932 888 855 20 20 908 908 908 908 894 838 798 768 22 22 824 824 824 824 812 761 725 697 24 24 755 755 755 755 744 697 664 639 26 26 696 696 696 696 686 643 612 589 28 28 646 646 646 646 636 596 568 547 30 30 602 602 602 602 594 556 530 510 36 36 501 501 501 501 494 463 441 424 42 42 429 429 429 429 423 396 377 363 44 44 410 410 410 410 404 378 360 347 46 46 392 392 392 392 386 362 344 331 48 48 375 375 375 375 370 346 330 318
Allowable Stress vs Temperature 150 250 350 450 550 650 750 850 950 1050 1150 1250 Temperature (°F) 0 7 14 21 28 Allowable Stress (ksi) Disclaimer: This calculator is for guidance only. Results are based on ASME B31.3-2024 allowable stresses for seamless pipe (Ej=1.0, W=1.0). Always verify against the current edition of the standard. The engineer of record is responsible for all design decisions.
References ASME B31.3-2024 — Process Piping, Table A-1 ASME B36.10M — Welded and Seamless Wrought Steel Pipe ASME B16.5-2020 — Pipe Flanges and Flanged Fittings 
