B444 N06625 Pipe MAWP Calculator ASTM B444 Gr-1, N06625 (625) Pipe SMLS, 60Ni-22Cr-9Mo-3.5Cb, annealed
Material Properties Description
ASTM B444 Gr-1, N06625 (625) Pipe SMLS, 60Ni-22Cr-9Mo-3.5Cb, annealed
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 13,318 13,318 13,185 13,052 12,852 12,586 12,320 12,086 1/4 0.54 12,876 12,876 12,747 12,619 12,426 12,168 11,911 11,685 3/8 0.675 10,420 10,420 10,316 10,212 10,056 9,847 9,639 9,457 1/2 0.84 9,991 9,991 9,891 9,791 9,641 9,441 9,242 9,067 3/4 1.05 8,147 8,147 8,066 7,984 7,862 7,699 7,536 7,393 1 1.315 7,619 7,619 7,543 7,467 7,353 7,200 7,048 6,914 1 1/4 1.66 6,274 6,274 6,211 6,149 6,054 5,929 5,803 5,694 1 1/2 1.9 5,644 5,644 5,587 5,531 5,446 5,333 5,220 5,122 2 2.375 4,755 4,755 4,707 4,660 4,588 4,493 4,398 4,315 2 1/2 2.875 5,200 5,200 5,148 5,096 5,018 4,914 4,810 4,719 3 3.5 4,515 4,515 4,470 4,425 4,357 4,267 4,176 4,097 3.5 4 4,118 4,118 4,077 4,036 3,974 3,891 3,809 3,737 4 4.5 3,828 3,828 3,790 3,751 3,694 3,617 3,541 3,474 5 5.563 3,355 3,355 3,322 3,288 3,238 3,171 3,104 3,045 6 6.625 3,049 3,049 3,018 2,988 2,942 2,881 2,820 2,767 7 7.625 2,842 2,842 2,813 2,785 2,742 2,686 2,629 2,579 8 8.625 2,683 2,683 2,657 2,630 2,590 2,536 2,482 2,435 9 9.625 2,551 2,551 2,525 2,500 2,461 2,410 2,359 2,315 10 10.75 2,435 2,435 2,410 2,386 2,349 2,301 2,252 2,209 12 12.75 2,102 2,102 2,081 2,060 2,029 1,986 1,944 1,908 14 14 1,911 1,911 1,892 1,873 1,844 1,806 1,768 1,734 16 16 1,668 1,668 1,651 1,635 1,610 1,576 1,543 1,514 18 18 1,480 1,480 1,465 1,450 1,428 1,399 1,369 1,343 20 20 1,330 1,330 1,317 1,303 1,283 1,257 1,230 1,207 22 22 1,208 1,208 1,196 1,183 1,165 1,141 1,117 1,096 24 24 1,106 1,106 1,095 1,084 1,067 1,045 1,023 1,004 26 26 1,020 1,020 1,010 1,000 984 964 943 926 28 28 946 946 937 927 913 894 875 859 30 30 883 883 874 865 852 834 817 801 36 36 735 735 727 720 709 694 679 667 42 42 629 629 623 616 607 594 582 571 44 44 600 600 594 588 579 567 555 545 46 46 574 574 568 562 554 542 531 521 48 48 550 550 544 539 531 520 509 499
Allowable Stress vs Temperature 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 1000 1100 1200 Temperature (°F) 0 10 20 30 40 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 
