Group 1.5: Alloy Steel C-½Mo

ASME B16.5-2020 Pressure-Temperature Ratings

Pressure Ratings > Flange > Group 1.5 — Alloy Steel C-½Mo
Group 1.5: Alloy Steel C-½Mo
Materials: A182 F1, A204 A/B

Pressure-Temperature Curve

  • Class 150
  • Class 1500
  • Class 2500
  • Class 300
  • Class 400
  • Class 600
  • Class 900
-201002003004005006006507007508008509009501000Temperature (°F)01500300045006000Pressure (psig)

Interpolation Calculator

Calculate allowable working pressure at any intermediate temperature by linear interpolation.

Group 1.5 Pressure-Temperature Ratings (psig)

Temp (°F)Class 150Class 300Class 400Class 600Class 900Class 1500Class 2500
−202656959301,3952,0903,4805,805
1002656959301,3952,0903,4805,805
2002606959301,3952,0903,4805,805
3002306859151,3752,0603,4355,725
4002006608851,3251,9853,3105,520
5001706408551,2851,9253,2105,350
6001406058051,2101,8153,0255,040
6501255907851,1751,7652,9404,905
7001105707551,1351,7052,8404,730
750955307101,0651,5952,6604,430
800805106751,0151,5252,5404,230
850654856509751,4602,4354,060
900504506009001,3502,2453,745
950352803755608451,4052,345
1000201652203304958251,370

Matching Pipe Materials — MAWP Calculators

Disclaimer: This chart is for guidance only. The data is from ASME B16.5-2020 and shall not be used for design without verification against the current edition of the standard. Ambient ratings apply from −20 °F (−29 °C) to 100 °F (38 °C). Rows highlighted in blue indicate the ambient temperature range.

References

  • ASME B16.5-2020 — Pipe Flanges and Flanged Fittings: NPS ½ Through NPS 24 Metric/Inch Standard
  • Pressure ratings are maximum allowable non-shock working pressures (psig or bar gauge)
  • Intermediate temperatures may be interpolated linearly between tabulated values
  • Ratings apply to flanged fittings of the designated class, including flanges, flanged valves, and flanged end fittings
  • For temperatures below −20 °F (−29 °C), consult ASME B16.5 for specific material limitations