Group 1.1: Carbon Steel

ASME B16.5-2020 Pressure-Temperature Ratings

Pressure Ratings > Flange > Group 1.1 — Carbon Steel
Group 1.1: Carbon Steel
Materials: A105, A350 LF2, A216 WCB, A515-70, A516-70, A537 Cl.1

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 1.1 Pressure-Temperature Ratings (psig)

Temp (°F)Class 150Class 300Class 400Class 600Class 900Class 1500Class 2500
−202857409851,4802,2203,7056,170
1002857409851,4802,2203,7056,170
2002606809051,3602,0353,3955,655
3002306558701,3101,9653,2705,450
4002006358451,2651,9003,1705,280
5001706058051,2051,8103,0155,025
6001405707551,1351,7052,8404,730
6501255507301,1001,6502,7454,575
7001105307101,0601,5902,6554,425
750955056751,0151,5202,5354,230
800804105508251,2352,0553,430
850653204256409551,5952,655
900502303054606901,1501,915
950351351852754106851,145
10002085115170255430715
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