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UL 80-2019 pdf free download
UL 80-2019 pdf free download.Steel Tanks for Oil-Burner Fuels and Other Combustible Liquids.
8.1 A tank of this class shall be cylindrical, obround, rectangular. or of another form which complies with all applicable performance tests, but shall not exceed a primary tank capacity of 660 gallons (2500 L). The marked nominal capacity shall be within 95 — 100 percent of the actual capacity.
8.2 A primary or secondary cylindrical tank shall have a maximum diameter of 48 inches (1.21 m) and shall be permitted to have flat, stamped, or dished heads.
8.3 A primary or secondary obround tank shall be formed in accordance with Figure 122, and shall be permitted to have flat, stamped. or dished heads between 38 to 48 inches in the greater dimension, and 18 to 28 inches in the lesser dimension.
8.4 A primary or secondary rectangular tank shall be formed with all sides flat at right angles, except for tops to allow drainage, with any one side not less than 12 inches or more than 90 inches.
8.5 Secondary tanks shall have containment to at least 300 degrees or 95 percent height of the primary tank and an interstitial space capable of being vented and monitored, The secondary tank walls are permitted to be in direct contact or separated by supporting members.
8.6 The secondary shall not have any drains or shell penetrations except for welded through connections for burner supply piping or top fittings from the primary tank, or the secondary interstitial vent.
8.7 The secondary shall be of a construction that provides liquid communication to the monitor area
8.8 The secondary top opening shall be permitted to combine venting and monitOring.
8.9 Diked tanks shall have containment of at least 110 percent of the primary tank, spill coverage of at least 1 inch beyond the pnmary tank projected area, and a wall height of at least 1/2 the pnmary tank height (with supports).
8.10 The dike shall not have any drains or wall penetrations except for welded and supported through connections for burner supply piping from the primary tank.
8.11 The dike shall be permitted to be of either an open or closed top design with or without baffles or supports but shall not prevent venting or liquid flow.
8.12 The dike shall have tank hold downs.
8.13 The additional bottom of double bottom tanks, when used, shall cover the tank bottom at least 2 inches (51 mm) above the lowest liquid level of the primary tank arid not less than 1 inch (25.4 mm) from each head. Fjjire 81 illustrates a typical double bottom design.UL 80-2019 pdf free download.
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