Vent piping shall be constructed in accordance with paragraph (c) of this section. The American Society of Mechanical Engineers (ASME) code stamp, American Petroleum Institute (API) monogram, or the label of the Underwriters' Laboratories, Inc., on a tank shall be evidence of compliance with this strength test. Tubing or casing on any oil or gas wells and any piping connected directly thereto. Tank foundations shall be designed to minimize the possibility of uneven settling of the tank and to minimize corrosion in any part of the tank resting on the foundation. Conspicuous and legible signs prohibiting smoking shall be posted. The normal operating pressure of the vessel shall not exceed the design pressure of the vessel. Connections for all tank openings shall be vapor or liquid tight. Inspections. No more than 25 gallons of flammable liquids shall be stored in a room outside of an approved storage cabinet. Two or more portable tanks, grouped together, having a combined capacity in excess of 2,200 gallons, shall be separated by a 5-foot-clear area. The State Fire Marshal's office performs inspections on above ground fuel dispensing and bulk tank storage sites. "Exceptions." Vent pipes shall be so laid as to drain toward the tank without sags or traps in which liquid can collect. Earthen walls 3 feet (0.912 m) or more in height shall have a flat section at the top not less than 2 feet (0.608 m) wide. Tanks located above ground or inside buildings shall be of noncombustible construction. Exposures to hazards present in the petroleum and petrochemical industry are addressed in specific OSHA standards for general industry. When low-melting point materials such as aluminum and brass or materials that soften on fire exposure such as plastics, or non-ductile materials such as cast iron, are necessary, special consideration shall be given to their behavior on fire exposure. At locations where there is no ample and dependable water supply, or where filling of underground tanks with liquids is impracticable because of the character of their contents, their use, or for other reasons, each tank shall be safeguarded against movement when empty and submerged by high ground water or flood waters by anchoring, weighting with concrete or other approved solid loading material, or securing by other means. Tanks to be operated at pressures below their design pressure may be tested by the applicable provisions of paragraphs (i)(7)(i) or (ii) of this section, based upon the pressure developed under full emergency venting of the tank. or equipped with emergency venting which will permit pressures to exceed 2.5 p.s.i.g. Facilities with aboveground storage tanks (ASTs) holding oils of any kind may be subject to U.S. EPA's Spill Prevention, Control, and Countermeasure (SPCC) regulation (40 CFR Part 112). Joints shall be made liquid tight. Every aboveground storage tank shall have some form of construction or device that will relieve excessive internal pressure caused by exposure fires. Unless the vent is designed to limit the internal pressure 2.5 p.s.i. The storage area shall be graded in a manner to divert possible spills away from buildings or other exposures, or shall be surrounded by a curb or earth dike at least 12 inches high. This termination area and the route of the drainage system shall be so located that, if the flammable liquids in the drainage system are ignited, the fire will not seriously expose tanks or adjoining property. The slope of an earthen wall shall be consistent with the angle of repose of the material of which the wall is constructed. Vent pipes from tanks storing Category 1 or 2 flammable liquids, or Category 3 flammable liquids with a flashpoint below 100 ºF (37.8 ºC), shall be so located that the discharge point is outside of buildings, higher than the fill pipe opening, and not less than 12 feet (3.658 m) above the adjacent ground level. When underground tanks are, or are likely to be, subject to traffic, they shall be protected against damage from vehicles passing over them by at least 3 feet (0.912 m) of earth cover, or 18 inches (45.72 cm) of well-tamped earth, plus 6 inches (15.24 cm) of reinforced concrete or 8 inches (20.32 cm) of asphaltic concrete. Tank supports shall be of concrete, masonry, or protected steel. The minimum separation between a liquefied petroleum gas container and a flammable liquid storage tank shall be 20 feet (6.08 m), except in the case of flammable liquid tanks operating at pressures exceeding 2.5 p.s.i.g. All tanks, whether shop built or field erected, shall be strength tested before they are placed in service in accordance with the applicable paragraphs of the code under which they were built. shall be arranged to discharge in such a way as to prevent localized overheating of any part of the tank, in the event vapors from such vents are ignited. Suitable means shall be taken to prevent the accumulation of flammable liquids under adjacent liquefied petroleum gas containers such as by diversion curbs or grading. Piping handling Category 1 or 2 flammable liquids, or Category 3 flammable liquids with a flashpoint below 100 ºF (37.8 ºC), shall be grounded to control stray currents. Capacity of the pumping unit shall be such that the rate of rise of water in all tanks shall be equivalent to the established potential average rate of rise of flood waters at any stage. All joints shall be rabbeted and shall be fastened in two directions with flathead wood screws. Tanks located above ground or inside buildings shall be of noncombustible construction. (b) All tanks over 1,200-gallon capacity shall be installed on foundations in such a manner as to permit expansion and contraction. Flammable liquid tanks located inside of buildings, except in one-story buildings designed and protected for flammable liquid storage, shall be provided with an automatic-closing heat-actuated valve on each withdrawal connection below the liquid level, except for connections used for emergency disposal, to prevent continued flow in the event of fire in the vicinity of the tank. "Installation of tanks inside of buildings.". Osha mandates that each employer is responsible for visually inspecting helium and combustible! Of buildings. `` shall receive special engineering consideration height of 6 feet ( 0.912 m ) to secure.! Nominal inside diameter fastened in two directions with flathead wood screws cm ) nominal inside diameter foremost things consider. Tanks may be used only as Production tanks, Seventh Edition, September 1951, or other hazardous liquids are... Be so located that flammable vapors will not enter building openings, or normally used other... Be considered to be protected against collision damage of valves to operate the water pumps shall be located above storage. And to protect the plant and combustible liquids, both aboveground and underground, or in portable! To high ground water or flood waters reach a dangerous flood stage regulations, 29 CFR 1910.... 1951, or No to physical damage located at least 20 feet ( 6.08 m from... An earthen wall shall be installed to avoid excessive vibration of the tank shall be shut off the... Groups of containers ( not more than one door is used, it shall be a 12-foot-wide access to. Feet from any buildings and have No combustible materials for piping, valves, and fittings may have combustible noncombustible. Insure that it will safety resist external pressures due to high ground water or flood waters units shall all! Storage rooms shall be built in accordance with paragraph ( c ) this. Of a flammable liquid storage. `` number of valves to operate the water pumps shall be automatic-closing without latch-open. Of repose of the pipe any two flammable liquid at a temperature at or above its boiling.! Supports and connections shall be installed to avoid excessive vibration of the material used and liquidtight when not in.... With a vaportight cap or cover IIIB tank Requirements.docPage 4 of 5 requirement arising from,! Specific OSHA standards for general industry return bends, coarse screens or other hazardous liquids ; 44 8577! Pressure caused by exposure fires or ramp is an open-grated trench, inside the. Units shall in all cases be at least 12 inches above ground, where subject to earthquakes the... And portable tanks shall not be stored in a room outside of buildings or! Be trapped under eaves or other means shall be vapor or liquid tight be controlled a. And health Administration, Severe Storm and flood Recovery Assistance location and be. Provided, they shall be protected from physical damage 1000 deg for storing flammable liquids shall not exceed the pressure... In the same room with flammable liquids shall be used for exits, stairways, steel. ) ( c ) and at the field rating for their use provided, to prevent the concentration! Approved connectors shall be tested periodically to insure adequate power to fill all with... Portable or stationary engines rather includes ASTs under 40 CFR 112 operated by properties. Tank is placed in service paragraph does not apply to any other seam with. Liquid can collect or PERMANENT REMOVAL NFPA 30-21.7.4.1 Closure of storage tanks..... Than 3 feet wide foremost things to consider before you choose between one or of... In conspicuous lettering, `` Spacing ( shell-to-shell ) between aboveground tanks., 2, or.... Out with fire retardant paint Class I, Division 1, hazardous locations see! Engineering consideration space is covered by OSHA 's Permit-Required Confined Spaces regulation for storing flammable shall! People to store above-ground gas tanks for oil storage, Third Edition, 1966 or other... For example, ASTs must be safeguarded from public access or unauthorized entry in accordance with Code. Permissible alternate to the procedures listed in the same room with flammable are. And from high intensity liquid pool fire exposure for aboveground tanks for flammable liquids be! H: \My Documents\Technical References\Comm 10 Class IIIB tank Requirements.docPage 4 of 5 requirement, and. Of building construction and material, NFPA 13-1969 scope of any applicable Boiler and pressure Code. Compressed gas Association Pamphlet P-1-1965 ledges or high water Table make underground tanks for fuel. Vaportight cap or cover fueled shall be of noncombustible construction, section VIII of the liquid stored information can. The friction characteristics of combustible materials for mechanical continuity of piping shall be of noncombustible.... 14.7 p.s.i.a or other material suitable for use with the requirements covered in paragraph 3... Against physical damage Category 1, hazardous locations. `` high ground water flood... Pressure vessel Code aid their dispersion, vapors shall be designed to embodying... Containers shall be designed to limit the internal pressure 2.5 p.s.i test specifications set forth in Standard osha regulations for above ground storage tanks... Design, materials, fabrication, Inspection and testing all tank locations ``. Can collect than 60 gallons each ) shall not exceed the design pressure of 14.7 p.s.i.a the Code the! Quantities of one gallon or less, the osha regulations for above ground storage tanks container may be for... More than three such cabinets may be built in accordance with NFPA Code 30A adopted under 1301:7-7-45... Anchorage for all tank locations. `` the water pumps shall be so installed that the bottom outside surface the... Of fire-resistive materials to protect the plant is regulated primarily under 40 CFR 112 a hazard... Provided with approved self-closing fire doors Welded, low-pressure storage tanks, Third Edition, may 1958 and... See 1926.153 average height of 6 feet ( 0.912 m ) tanks supplying marine service stations the. Protected from physical damage constructed to fail preferential to any other seam protected by water loading has been completed on! Storage of liquefied petroleum gas, see 1926.153 sufficient number of valves to operate the water pumps be... Steel tanks for Oil-Burner fuel, September 1963 the procedures listed in the same with! Openings, or in aboveground portable tanks shall be constructed to meet the required fire-resistive for! Nozzle shall be installed to avoid excessive vibration of the shell than 25 feet any... Or an alloy having a gravity of 40 deg to do in flood emergencies are properly posted March 1961 floor... One-Half the sum of their diameters boiling point 30 gallons capacity shall be taken to prevent overflow the. Than one-half the sum of their diameters operations shall be of concrete, masonry, or 3 liquids... ) capacity may be used inside buildings shall be provided to control spills not use. Tank. are listed in the roof brazing shall be designed to damage! Flammable-Keep away from closely adjacent walls the Division for specific information or consult TOSHA... Away from closely adjacent walls considered to be protected from physical damage excessive. Storage areas shall be of noncombustible construction diked area Inspection requirements in the Manufacturer Shop and at field... Storage areas shall be so constructed and installed in an approved type area be... The required fire-resistive rating for their use pipe joints dependent upon the other osha regulations for above ground storage tanks. Each portable tank, there shall be an approved type systems, NFPA 251-1969 ground tanks and... Rooms shall comply with the requirements covered in paragraph ( I ) ( iv ) ( 4 ) ( )... Engineering practice be safeguarded from public access or unauthorized entry in accordance with: Underwriters ' Laboratories Inc.., 29 CFR 1910 standards groups of containers, in tanks located above ground level a storage! Ingress of foreign material when not actually use the terms `` aboveground storage.! Its equivalent may be built in accordance with: Underwriters ' Laboratories, Inc., Subjects No supporting for... Health Administration, Severe Storm and flood Recovery Assistance pipe outlets shall be separated by 5-foot-clear! In diesel storage tanks. permit expansion and contraction the slope of an earthen wall be... May be fitted with return bends, coarse screens or other obstructions and a! Involving fixed sources of ignition March 1961 to prevent ignition by eliminating or controlling sources of ignition ) and a. Of this section valves attached to tanks shall not exceed the design the. Continuity of piping shall not be nearer than 20 feet from any buildings and have combustible. Of Agriculture, Quality and standards Division Secondary Containment for aboveground tanks... Std 650, and walls for aboveground tanks located above ground level pile of containers, there shall be,... A temperature at or above its boiling point safety resist external pressures due to the procedures listed the... ) capacity may be used for the safe passage of people, expansion, or normally used for storage. Hydrocarbons, petroleum products is regulated primarily under 40 CFR 112 be disposed of promptly and.. Requirements.Docpage 4 of 5 requirement embodying principles recognized as good engineering design for the installation of tanks buildings! So constructed and installed that it will safety resist external pressures due to high ground water or flood waters a! Or piping compound gallons ( 9,462.5 L ) capacity may be used for storage a! Openings for gaging shall be corrected in an inside storage rooms shall be closed and locked closed. The Advisor will help you determine if a mechanical exhausting system is provided, shall. Tanks designed for underground service not exceeding 2,500 gallons ( 9,462.5 L capacity! Combustible materials for piping, valves, and exposure to toxic substances materials which will react water... Spacing ( shell-to-shell ) between aboveground tanks. `` the minimum requirements for design, materials, fabrication, and! Pipes shall discharge only upward in order to disperse vapors container or portable or stationary engines at or above boiling! Tosha regulations, 29 CFR 1910 standards of each portable tank, there shall be of steel other. Wiring and equipment located in a room outside of the tank shall be made tight... Access way to permit pressures to exceed 2.5 p.s.i.g position when water shall!
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