Group 1.2: Alloy Steel C-Mn-Si

ASME B16.5-2020 Pressure-Temperature Ratings

Pressure Ratings > Flange > Group 1.2 — Alloy Steel C-Mn-Si
Group 1.2: Alloy Steel C-Mn-Si
Materials: A350 LF6-2, A216 WCC, A352 LCC/LC2/LC3, A203 B/E

Pressure-Temperature Curve

  • Class 150
  • Class 1500
  • Class 2500
  • Class 300
  • Class 400
  • Class 600
  • Class 900
-201002003004005006006507007508008509009501000Temperature (°F)02000400060008000Pressure (psig)

Interpolation Calculator

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

Group 1.2 Pressure-Temperature Ratings (psig)

Temp (°F)Class 150Class 300Class 400Class 600Class 900Class 1500Class 2500
−202907501,0001,5002,2503,7506,250
1002907501,0001,5002,2503,7506,250
2002607501,0001,5002,2503,7506,250
3002307309701,4552,1853,6406,070
4002007059401,4052,1103,5205,865
5001706658851,3301,9953,3255,540
6001406058051,2101,8153,0255,040
6501255907851,1751,7652,9404,905
7001105557401,1101,6652,7754,630
750955056751,0151,5202,5354,230
800804105508251,2352,0553,430
850653204256409551,5952,655
900502252954456701,1151,855
950351351852754106851,145
10002085115170255430715

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