34 square in materials 2 valve size ansi flange class

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Unformatted text preview: re 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 13 Table 11—Spring-loaded Pressure Relief Valves “N” Orifice (Effective Orifice Area = 4.34 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 80 160 160 160 73/4 73/4 73/4 73/4 73/4 81/4 81/4 81/4 83/4 83/4 215 430 650 285 285 285 160 160 160 73/4 73/4 73/4 81/4 83/4 83/4 20 20 350 700 275 275 275 275 80 80 160 160 73/4 73/4 73/4 73/4 81/4 81/4 81/4 83/4 140 140 140 140 80 80 140 140 73/4 73/4 73/4 73/4 81/4 81/4 81/4 83/4 230 230 230 230 230 80 80 160 160 160 73/4 73/4 73/4 73/4 73/4 81/4 81/4 81/4 83/4 83/4 Temperature Range, Ð 20¡F to 800¡F Inclusive Carbon Steel 4N6 4N6 (4) 4N6 4N6 4N6 150 300 300 600 900 150 150 150 150 150 285 285 740 1000 185 285 615 1000 80 285 410 825 1000 Temperature Range, 801¡F to 1000¡F Inclusive Chrome Molybdenum Steel 4N6 4N6 4N6 300 600 900 150 150 150 510 1000 1000 Temperature Range, Ð 450¡F to 1000¡F Inclusive Austenitic Stainless Steel 4N6 4N6 (4) 4N6 4N6 150 300 300 600 150 150 150 150 275 275 450 500 275 275 720 1000 275 275 720 10...
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This document was uploaded on 11/25/2013.

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