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Unformatted text preview: 5 285 615 1235 1845 3080 5000 80 285 410 825 1235 2060 3430 Temperature Range, 801¡F to 1000¡F Inclusive Chrome Molybdenum Steel 11/2F2 11/2F2 11/2F3 11/2F3 11/2F3 300 600 900 1500 2500 150 150 300 300 300 510 1015 1525 2540 4230 Temperature Range, Ð 450¡F to 1000¡F Inclusive Austenitic Stainless Steel 11/2F2 11/2F2 (4) 11/2F2 11/2F2 11/2F3 11/2F3 11/2F3 150 300 300 600 900 1500 2500 150 150 150 150 300 300 300 275 275 720 1440 2160 2200 3400 275 275 720 1440 2160 3600 5000 275 275 720 1440 2160 3600 5000 180 180 495 975 1485 2480 4130 80 80 420 845 1265 2110 3520 Temperature Range, Ð 20¡F to 600¡F Inclusive Nickel/Copper Alloy (5) 11/2F2 11/2F2 (4) 11/2F2 11/2F2 150 300 300 600 150 150 150 150 140 140 360 720 140 140 360 720 140 140 360 720 Temperature Range, Ð 20¡F to 300¡F Inclusive Alloy 20 (6) 11/2F2 11/2F2 (4) 11/2F2 11/2F2 11/2F3 11/2F3 11/2F3 150 300 300 600 900 1500 2500 150 150 150 150 300 300 300 230 230 600 1200 1800 3000 5000 180 180 465 930 1395 2330 3880 Notes: 1. Outlet pressure limit for temperatures above 100¡F shall not exceed the rating in ANSI/ASME B16.34. 2. Materials given are minimum requirements for the pressure and temperature ratings. Other suitable materials may be used, as required, for the service involved. 3. Chrome alloy springs may be used above 450¡F. 4. Set pressure limited for low pressure applications where a Class 300 ßange is preferred over a Class 150 ßange. 5. Material limited to 600¡F. Pressure ratings indicated in the 451¡F to 800¡F column are limited to 600¡F. 6. Material limited to 300¡F. Pressure ratings indicated in the 101¡F to 450¡F column are limited to 300¡F. Copyright American Petroleum Institute Reproduced by IHS under license with API No reproduction or networking permitted without license from IHS Licensee=TECNA/5935100001 Not for Resale, 05/05/2005 09:50:16 MDT FLANGED STEEL PRESSURE RELIEF VALVES 7 Table 5—Spring-loaded Pressure Relief Valves “G” Orifice (Effective Orifice Area = 0.503 square in.) Materials (2) Valve Size ANSI Flange Class Maximum Pressure (psig) Conventional and Balanced Bellows Valves Spring Materials (3...
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