5 material limited to 600f pressure ratings indicated

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Unformatted text preview: irements 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 800¡F Inclusive 6 API STANDARD 526 Table 4—Spring-loaded Pressure Relief Valves “F” Orifice (Effective Orifice Area = 0.307 square in.) Materials (2) Valve Size ANSI Flange Class Maximum Pressure (psig) --``,,,`,``,,`````,,,,,`,,,``-`-`,,`,,`,`,,`--- Conventional and Balanced Bellows Valves Spring Materials (3) Low Carbon Carbon Carbon High High Temper- Steel or Steel or Steel or Temper- Temperature Chrome Chrome Chrome ature ature Alloy Alloy Alloy Alloy Alloy Alloy Steel Steel Steel Steel Steel Steel 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 Outlet Pressure Limit (1) Conventional Valves Bellows Valves 100¡F 100¡F Inlet Outlet 285 285 285 285 740 740 740 230 230 230 230 500 500 500 47/8 47/8 47/8 47/8 47/8 47/8 51/2 43/4 43/4 6 6 61/2 61/2 7 215 430 650 1080 1800 285 285 740 740 740 230 230 500 500 500 47/8 47/8 47/8 47/8 51/2 6 6 61/2 61/2 7 20 20 350 700 1050 1750 2915 275 275 275 275 600 600 720 230 230 230 230 500 500 500 47/8 47/8 47/8 47/8 47/8 47/8 51/2 43/4 43/4 6 6 61/2 61/2 7 140 140 140 140 140 140 140 140 47/8 47/8 47/8 47/8 43/4 43/4 6 6 230 230 230 230 600 600 600 230 230 230 230 500 500 500 47/8 47/8 47/8 47/8 47/8 47/8 51/2 43/4 43/4 6 6 61/2 61/2 7 801¡F to 1000¡F Center to Face Dimensions (in.) Temperature Range, Ð20¡F to 800¡F Inclusive Carbon Steel 11/2F2 11/2F2 (4) 11/2F2 11/2F2 11/2F3 11/2F3 11/2F3 150 300 300 600 900 1500 2500 150 150 150 150 300 300 300 285 285 740 1480 2220 3705 5000 18...
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This document was uploaded on 11/25/2013.

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