Other suitable materials may be used as required for

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Unformatted text preview: 00 180 180 495 975 80 80 420 845 Temperature Range, Ð 20¡F to 600¡F Inclusive Nickel/Copper Alloy (5) 4N6 4N6 (4) 4N6 4N6 150 300 300 600 150 150 150 150 140 140 360 720 140 140 360 720 140 140 360 720 Alloy 20 (6) 4N6 4N6 (4) 4N6 4N6 4N6 150 300 300 600 900 150 150 150 150 150 230 230 600 1000 1000 180 180 465 930 1000 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 --``,,,`,``,,`````,,,,,`,,,``-`-`,,`,,`,`,,`--- Temperature Range, Ð 20¡F to 300¡F Inclusive 14 API STANDARD 526 Table 12—Spring-loaded Pressure Relief Valves “P” Orifice (Effective Orifice Area = 6.38 square in.) Materials (2) Valve Size ANSI Flange Class Maximum Pressure (psig) Conventional and Balanced Bellows Valves Spring Materials (3) Outlet Pressure Low Carbon Carbon Carbon High High Limit (1) Temper- Steel or Steel or Steel or Temper- Temperature Chrome Chrome Chrome ature ature ConvenAlloy Alloy Alloy Alloy Alloy Alloy tional Bellows Steel Steel Steel Steel Steel Steel Valves Valves Body/Bonnet Inlet by OriÞce by Outlet Inlet Outlet Ð 450¡F to Ð 76¡F Ð 75¡F to Ð 21¡F Ð 20¡F to 100¡F 101¡F to 450¡F 451¡F to 800¡F 801¡F to 1000¡F Center to Face Dimensions (in.) 100¡F 100¡F Inlet Outlet 285 285 285 285 285 80 80 150 150 150 71/8 71/8 87/8 87/8 87/8 9 9 10 10 10 215 430 650 285 285 285 150 150 150 87/8 87/8 87/8 10 10 10 20 20 350 700 275 275 275 275 80 80 150 150 71/8 71/8 87/8 87/8 9 9 10 10 140 140 140 140 80 80 140 140 71/8 71/8 87/8 87/8 9 9 10 10 230 230 230 230 230 80 80 150 150 150 71/8 71/8 87/8 87/8 87/8 9 9 10 10 10 Temperature Range, Ð 20¡F to 800¡F Inclusive Carbon Steel 4P6 4P6 (4) 4P6 4P6 4P6 150 300...
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