Maximum temperature and pressure ratings of flanges conforming dimensions ASME B16.5 Pipe Flanges and Flanged Fittings - and materials specification ASTM A-105 Specification for Carbon Steel Forgings for Piping Applications - temperature in Fahrenheit and pressure in psi.

Gauge Pressure (psi)
Temperature
(oF)
 Flange Class
15030040060090015002500
< 1002857409901480222037056170
2002606759001350202533755625
3002306558751315197032805470
4002006358451270190031705280
5001706008001200179529954990
6001405507301095164027354560
6501255357151075161026854475
7001105357101065160026654440
750955056701010151025204200
80080410550825123520603430
8506527035553580513402230
900501702303455158601430
95035105140205310515860
1000205070105155260430

 

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