(a) Filling and discharge lines for Class I and Class II liquids, and for Class III liquids where practicable, shall enter tanks only through the top and shall be graded toward the tank.
Fill openings Fill openings (b) The fill-pipe opening shall be located outside of any building. For Class I or II flammable liquids storage the fill-pipe opening shall be not less than 5 feet from any door or cellar opening. For Class III flammable liquid storage the fill-pipe opening shall be not less than 2 feet from any building opening at the same or lower level. The fill-pipe opening shall be closed and liquid tight when not in use. Fill-pipe for filling by tank car or tank truck shall be not larger than 4 inches nominal inside diameter and shall be not constricted. Fill-pipe openings shall be identified by a definite color scheme or other means.
Fill openings (b) The fill-pipe opening shall be located outside of any building. For Class I or II flammable liquids storage the fill-pipe opening shall be not less than 5 feet from any door or cellar opening. For Class III flammable liquid storage the fill-pipe opening shall be not less than 2 feet from any building opening at the same or lower level. The fill-pipe opening shall be closed and liquid tight when not in use. Fill-pipe for filling by tank car or tank truck shall be not larger than 4 inches nominal inside diameter and shall be not constricted. Fill-pipe openings shall be identified by a definite color scheme or other means.
(b) The fill-pipe opening shall be located outside of any building. For Class I or II flammable liquids storage the fill-pipe opening shall be not less than 5 feet from any door or cellar opening. For Class III flammable liquid storage the fill-pipe opening shall be not less than 2 feet from any building opening at the same or lower level. The fill-pipe opening shall be closed and liquid tight when not in use. Fill-pipe for filling by tank car or tank truck shall be not larger than 4 inches nominal inside diameter and shall be not constricted. Fill-pipe openings shall be identified by a definite color scheme or other means.
Gauge openings Gauge openings (c) Gauge openings, if independent of fill-pipe, shall be provided with liquid-tight cap or cover. Where Class I or Class II liquids are stored within a building, such gauge opening shall be protected against vapor release or liquid overflow by means of a spring-loaded check valve or other approved device.
Gauge openings (c) Gauge openings, if independent of fill-pipe, shall be provided with liquid-tight cap or cover. Where Class I or Class II liquids are stored within a building, such gauge opening shall be protected against vapor release or liquid overflow by means of a spring-loaded check valve or other approved device.
(c) Gauge openings, if independent of fill-pipe, shall be provided with liquid-tight cap or cover. Where Class I or Class II liquids are stored within a building, such gauge opening shall be protected against vapor release or liquid overflow by means of a spring-loaded check valve or other approved device.
Drainage of tanks in buildings Drainage of tanks in buildings (d) Inside storage tanks for Class III flammable liquids shall be provided with draw-off or drain openings. Tanks shall be installed so that the bottom pitches to the draw-off or drain openings at a slope of not less than ¼ inch per foot of length. The draw-off or drain opening shall be provided with suitable connection to provide a sump from which water or sediment can be drained readily.
Drainage of tanks in buildings (d) Inside storage tanks for Class III flammable liquids shall be provided with draw-off or drain openings. Tanks shall be installed so that the bottom pitches to the draw-off or drain openings at a slope of not less than ¼ inch per foot of length. The draw-off or drain opening shall be provided with suitable connection to provide a sump from which water or sediment can be drained readily.
(d) Inside storage tanks for Class III flammable liquids shall be provided with draw-off or drain openings. Tanks shall be installed so that the bottom pitches to the draw-off or drain openings at a slope of not less than ¼ inch per foot of length. The draw-off or drain opening shall be provided with suitable connection to provide a sump from which water or sediment can be drained readily.