§ 785. Ventilation
Rooms or enclosures in which Class I or Class II flammable liquids are pumped or dispensed, used in open vats or dip tanks, or mixed or blended shall be provided with natural or mechanical ventilation that will prevent the accumulation of flammable vapors in hazardous concentrations.
§ 781. Vents on tanks underground or in buildings—Location and arrangement of vents, Class I or II
(a) Vent pipes from tanks storing Class I or Class II flammable liquid shall be so located that the discharge point is outside of buildings, higher than the fill pipe opening, and not less than 12 feet above the adjacent ground level. Vent pipes shall discharge only upward or horizontally (not downward) in order to […]
§ 782. Fill and gauge openings on tanks underground or in buildings—Fill and discharge piping
(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 (b) The fill-pipe opening shall be located outside of any building. For Class I or II flammable liquids storage the […]
§ 783. Piping, valves and fittings
(a) Piping, valves, and fittings for flammable liquids shall be designed for the working pressures and structural stresses to which they may be subjected. (b) Pipe systems shall be substantially supported and protected against physical damage and excessive stresses arising from settlement, vibration, expansion or contraction. (c) Pipe systems shall contain a sufficient number of […]
§ 776. Underground tanks—Location Class I and II
(a) An underground tank for Class I or Class II flammable liquids shall be located not less than the distance indicated in Table 776, measured horizontally from the nearest point of the shell to the nearest line of adjoining property that may be built upon and the nearest outside wall of any basement or pit, […]
§ 777. Tanks inside of buildings, Class I or II liquids
Tanks for storage of Class I and II flammable liquids shall not be installed inside buildings except under special conditions as covered by nationally recognized standard practice as specified in section 609 of this title.
§ 778. Tanks inside of buildings, Class III liquids
(a) Unenclosed tanks shall not be located within 5 feet, horizontally, of any fire or flame. (b) Tanks larger than 60 gallons capacity shall not be located in buildings above the lowest story, cellar or basement, except in commercial, industrial or processing plants where storage on a higher floor is required by the process. (c) […]
§ 779. Design and construction of tanks
Tanks shall be designed and constructed to withstand safely the service to which subjected. Material other than steel, if used, shall be of suitable durability and of thicknesses providing equivalent strength to that provided by steel. Steel commonly known as “mill seconds” shall not be used.
§ 780. Vents on outside aboveground tanks—Vents for normal breathing
(a) Tanks shall have normal venting capacity sufficient to permit the filling and emptying of such tanks, plus their breathing due to temperature changes, without distortion of tank shell or roof. Tanks storing Class I and Class II flammable liquids shall be equipped where practical with either venting devices which shall be normally closed when […]
§ 771. Scope of subchapter
This subchapter shall apply to the storage, handling and use of flammable liquids as hereinafter defined; except that it shall not apply to the transportation of flammable liquids when in conformity with Interstate Commerce Commission regulations, or regulations lawfully on file with and approved by the Interstate Commerce Commission.