Tank Venting Api2000: vent_type_selection

API Standard 2000 (7th Ed 2014) tank venting requirements — normal thermal inbreathing/outbreathing SCFH by tank volume (100–180,000 bbl), pump-in/pump-out liquid movement venting rates, emergency fire-case venting by wetted area (100–2800 ft2), flash point and latitude correction factors, insulation credits, conservation vent set pressure/vacuum settings, and vent type selection guidance for atmospheric and low-pressure fixed-roof storage tanks

Chemical Engineeringventing_scenario: vent_type_selection2 rows
venting scenariorecord idnotesparameter categoryset pressure oz per in2 (oz/in^2)
vent_type_selectionpilot_operatedPilot-operated pressure/vacuum relief valves (POPRV): preferred for low-pressure set points 0.5-15 oz/in2; superior seat tightness; simpler sizing; recommended for fugitive emission control per EPA 40 CFR Part 63; higher cost than weight-loadedvent_type2
vent_type_selectionweight_loadedWeight-loaded conservation vents: traditional design; set point adjustable by adding/removing weights; reliable; limited to pressure settings <= ~8 oz/in2; simpler maintenance; used on older fixed-roof tanks; susceptible to sticking at low set pointsvent_type2

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