A312 TP316 Pipe MAWP Calculator ASTM A312 TP316 SS Pipe Smls 16Cr-12Ni-2Mo
Material Properties Description
ASTM A312 TP316 SS Pipe Smls 16Cr-12Ni-2Mo
Min Design Temperature
-425 °F
Y Coefficient
Ref 4 — Austenitic steels
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 6,659 6,659 6,659 6,426 5,993 5,660 5,427 5,294 1/4 0.54 6,438 6,438 6,438 6,213 5,794 5,472 5,247 5,118 3/8 0.675 5,210 5,210 5,210 5,028 4,689 4,429 4,246 4,142 1/2 0.84 4,995 4,995 4,995 4,821 4,496 4,246 4,071 3,971 3/4 1.05 4,074 4,074 4,074 3,931 3,666 3,463 3,320 3,238 1 1.315 3,810 3,810 3,810 3,676 3,429 3,238 3,105 3,029 1 1/4 1.66 3,137 3,137 3,137 3,027 2,823 2,666 2,557 2,494 1 1/2 1.9 2,822 2,822 2,822 2,723 2,540 2,399 2,300 2,243 2 2.375 2,377 2,377 2,377 2,294 2,140 2,021 1,938 1,890 2 1/2 2.875 2,600 2,600 2,600 2,509 2,340 2,210 2,119 2,067 3 3.5 2,258 2,258 2,258 2,179 2,032 1,919 1,840 1,795 3.5 4 2,059 2,059 2,059 1,987 1,853 1,750 1,678 1,637 4 4.5 1,914 1,914 1,914 1,847 1,723 1,627 1,560 1,522 5 5.563 1,678 1,678 1,678 1,619 1,510 1,426 1,367 1,334 6 6.625 1,524 1,524 1,524 1,471 1,372 1,296 1,242 1,212 7 7.625 1,421 1,421 1,421 1,371 1,279 1,208 1,158 1,130 8 8.625 1,342 1,342 1,342 1,295 1,208 1,140 1,094 1,067 9 9.625 1,275 1,275 1,275 1,231 1,148 1,084 1,039 1,014 10 10.75 1,217 1,217 1,217 1,175 1,096 1,035 992 968 12 12.75 1,051 1,051 1,051 1,014 946 893 857 836 14 14 955 955 955 922 860 812 779 760 16 16 834 834 834 805 751 709 680 663 18 18 740 740 740 714 666 629 603 588 20 20 665 665 665 642 598 565 542 529 22 22 604 604 604 583 543 513 492 480 24 24 553 553 553 534 498 470 451 440 26 26 510 510 510 492 459 433 416 405 28 28 473 473 473 457 426 402 386 376 30 30 441 441 441 426 397 375 360 351 36 36 367 367 367 354 331 312 299 292 42 42 314 314 314 303 283 267 256 250 44 44 300 300 300 290 270 255 245 239 46 46 287 287 287 277 258 244 234 228 48 48 275 275 275 265 247 234 224 219
Allowable Stress vs Temperature 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 Temperature (°F) 0 5 10 15 20 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 
