UL Standard for Safety Outline of Investigation for Special Purpose Aboveground Tanks for Specific Flammable or Combustible Liquids (COMMENTS DUE: November 20@ 2017)
These requirements cover special purpose steel aboveground tanks for specific fuels or liquids and/or use applications as indicated for each special purpose tank type@ which are intends to address the specific designs@ features@ limitations@ use factors and other unique characteristics of each type. These requirements are not covered by UL 142 for general purpose steel aboveground tanks for flammable and combustible liquids@ as each special purpose tank deviates from them by construction@ performance and/or markings for the intended use. The basic types of different special purpose tanks covered by this Standard are: a) Generator base tanks are designed for combined combustible fuel storage and structural support for diesel or turbine engine power generators@ and are intended to be installed in accordance with the Installation and Use of Stationary Combustion Engines and Gas Turbines@ NFPA 37@ or Emergency and Standby Power Systems@ NFPA 110. Generator base tanks are limited to Combustible Class II or III fuels@ such as diesel@ kerosene@ turbine oils or heavy oils. Covered options may include fire resistance@ damage resistance and/or tank support evaluations. b) Work top tanks are designed for combined combustible liquid storage and structural working surface@ and are intended to be installed in accordance with NFPA 30@ Code for Flammable and Combustible Liquids@ NFPA 30A@ Code for Motor Fuel Dispensing Facilities and Repair Garages@ or NFPA 31@ Installation of Oil-Burning Equipment. Work top tanks are limited to Combustible Class III liquids@ such as heavy fuel oils@ new/used lube oils@ hydraulic/transmission oils@ or similar working fluids. Covered options may include racks@ shelves and/or tank support evaluations. c) Lube oil tanks are designed for storage of unused lubricating oils and similar combustible liquids@ and are intended to be installed in accordance with NFPA 30@ Code for Flammable and Combustible Liquids@ NFPA 30A@ Code for Motor Fuel Dispensing Facilities and Repair Garages@ or NFPA 31@ Installation of Oil-Burning Equipment. Lube oil tanks are limited to Combustible Class IIIB oils@ such as motor crankcase oils@ hydraulic/transmission oils@ machine/ cutting oils@ or similar fluids. Covered options may include dispensing equipment and/or tank support evaluations. d) Used oil tanks are designed for storage of used lubricating oils and similar combustible liquids@ and are intended to be installed in accordance with NFPA 30@ Code for Flammable and Combustible Liquids@ NFPA 30A@ Code for Motor Fuel Dispensing Facilities and Repair Garages@ or NFPA 31@ Installation of Oil-Burning Equipment. Used oil tanks are limited to Combustible Class IIIB oils@ such as motor crankcase oils@ hydraulic/transmission oils@ machine/ cutting oils@ or similar fluids. Covered options may include recycling equipment and/or tank support evaluations. e) Day tanks are designed for a small temporary or backup supply of fuel for engine-driven equipment@ such as pumps or generators@ and fuel-burning appliances such as furnaces or heaters@ or other portable equipment typically used in farm@ construction@ mining@ forestry@ or similar applications@ and are intended to be installed in accordance with NFPA 30@ Code for Flammable and Combustible Liquids@ NFPA 30A@ Code for Motor Fuel Dispensing Facilities and Repair Garages@ NFPA 31@ Installation of Oil-Burning Equipment@ NFPA 37@ Installation and Use of Stationary Combustion Engines and Gas Turbines@ or NFPA 110@ Emergency and Standby Power Systems. Day Tanks are limited to specific fuels as marked@ such as Flammable Class I gasoline or Combustible Class II kerosene@ diesel fuel or heating oil. Covered options may include dispensing equipment and/or tank support evaluations. All special purpose tanks are atmospheric types@ but may be of primary@ secondary or diked containment designs; constructed in cylindrical or rectangular shapes; oriented horizontally or vertically@ and have additional features or options@ as described for each tank type. All special purpose tanks are shop fabricated@ but may be either completely assembled at the factory@ or allow for limited field assembly. However@ only the optional accessories which are described in this Standard and have been evaluated to applicable requirements are covered items for each tank type. These requirements cover only the accessories@ components and features specifically identified in this Standard. Any other accessories or components that are shipped with the tanks@ attached to the tanks@ or added to the tanks are not included in the scope of the tank evaluation. It is intended that the AHJ approve the use and/or installation of any such accessories or components independent of the evaluated tank. For some special purpose tank types@ it is expected that generators@ engines@ pumps or other equipment may be mounted on or connected to the tank. However@ these devices are not covered or evaluated by the requirements of this Standard@ other than the structural integrity of the tank at rated loads. These requirements do not cover portable tanks intended for transporting flammable or combustible liquids (such as by truck@ rail@ ship or air)@ or mobile use applications (such as on vehicles or trailers). These types of products are covered by separate UN@ DOT@ or other specific end product standards. These requirements do not cover special evaluations for resistance to hurricanes@ tornadoes@ earthquakes@ floods@ or other natural disasters; or fire and damage resistance@ except for generator base tank options. However@ assessment of any damage for continued use after such events are not included in the evaluation. These requirements do not cover general purpose tanks@ which are found in the Standard for Steel Aboveground Tanks for Flammable and Combustible Liquids@ UL 142@ or fuel oil tanks@ which are found in the Standard for Steel Tanks for Oil Burner Fuel and Other Combustible Liquids@ UL 80. The common fuel@ oil and other liquid terms referenced in this Standard are intended to be those which are commercially available@ and which meet a recognized industry specification@ such as ASTM or SAE.