B threaded openings shall be plugged with suitable

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Unformatted text preview: : a. After test and inspection, all exterior surfaces, except ßange facings, shall be painted as agreed upon by the manufacturer and the purchaser. Corrosion-resistant materials need not be painted. Flange facings shall be coated with a suitable corrosion inhibitor. b. Threaded openings shall be plugged with suitable protective devices. Temporary plugs should be readily distinguishable from permanent metal plugs. c. Inlet and outlet ßanges shall be protected to prevent damage from or entrance of foreign material during shipment. --``,,,`,``,,`````,,,,,`,,,``-`-`,,`,,`,`,,`--- 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 4 API STANDARD 526 Table 2—Spring-loaded Pressure Relief Valves “D” Orifice (Effective Orifice Area = 0.110 square in.) Materials (2) Valve Size ANSI Flange Class Maximum Pressure (psig) Conventional and Balanced Bellows Valves Spring Materials (3) Low Temperature Alloy Steel Body/Bonnet Inlet by OriÞce by Outlet Inlet Outlet Carbon Steel or Chrome Alloy Steel Carbon Steel or Chrome Alloy Steel Carbon Steel or Chrome Alloy Steel High Temperature Alloy Steel 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 High Limit (1) Temperature ConvenAlloy tional Bellows Steel Valves Valves Center to Face Dimensions (in.) 801¡F to 1000¡F 100¡F 100¡F Inlet Outlet 285 285 285 285 600 600 740 230 230 230 230 500 500 500 41/8 41/8 41/8 41/8 41/8 41/8 51/2 41/2 41/2 41/2 41/2 51/2 51/2 7 215 430 650 1080 1800 285 285 600 600 740 230 230 500 500 500 41/8 41/8 41/8 41/8 51/2 41/2 41/2 51/2 51/2 7 20 20 350 700 1050 1750 2915 275 275 275 275 600 600 720 230 230 230 230 500 500 500 41/8 41/8 41/8 41/8 41/8 41/8 51/2 41/2 41/2 41/2 41/2 51/2 51/2 7 140 140 140 140 140 140 140 140 41/8 41/8 41/8 41/8 41/2 41/2 41/2 41/2 230 230 230 230 600 600 600 230 230 230 230 500 500 500 41/8 41/8 41/8 41/8 41/8 41/8 51/2 41/2 41/2 41/2 41/2 51/2 51/2 7 Temperature Range, Ð 20¡F to 800¡F Inclusive Carbon Steel --``,,,`,``,,`````,,,,,`,,,``-`-`,,`,,`,`,,`--- Chrome Molybdenum Steel 1D2 1D2 (4) 1D2 1D2 11/2D2 11/2D2 11/2D3 150 300 300 600 900 1500 2500 150 150 150 150 300 300 300 285 285 740 1480 2220 3705 6000 185 285 615 1...
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