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th <br /> � NORCAP SALES& 5ERVICES� <br /> P. O. BOX 636, GALT, CA 95632 * (209) 745-9161 <br /> TECHNICAL BULLETIN <br /> FUEL STORAGE TANK LININGS USING NSS 37E EPDXY RESIN <br /> NSS 37E Epoxy Resin System is a specially formulated, <br /> chemically resistant product, which is specifically designed to <br /> be used in reinforced lining systems for methanol based fuels and <br /> solvent storage. The lining system is to be installed as a 1/8" <br /> thick coating, fusion bonded to the interior surface of an <br /> existing tank, reinforced with fiberglass fibers and other <br /> materials forming an impervious shell that stops and prevents <br /> leaks. It eliminates corrosion from within the tank and retards <br /> corrosion from outside elements in the soil. <br /> This technical bulletin outlines the procedure for the <br /> correct installations of this system. This method is to be used <br /> as a guide to help eliminate the costly and hazardous problem of <br /> replacing leaking underground storage tanks. <br /> Gasoline, and other fuels and solvents by themselves cannot <br /> cause corrosion. The damage is done by the water and oxygen that <br /> the above products pick up. At higher temperatures , these <br /> products are more heavily saturated with water and oxygen than at <br /> lower temperatures . As the product cools, the solubility of the <br /> water decreases and droplets of water form and settle out. As an <br /> example, when gasoline drops from a temperature of 140o F to 80o <br /> F, as much as 1/2 pound of water can come from 1650 gallons of <br /> gasoline. This means that more than 20 gallons of water could <br /> come from just one load of 6,000 gallons of gas. <br /> The corrosion rate also depends on the type of fuel or <br /> solvent. The more aromatic the product, the more water solubility <br /> it will have and the greater the corrosion rate. For example, <br /> premium fuel is more corrosive than regular fuel, and regular more <br /> corrosive than kerosene. <br /> Epoxy resins have long been recognized by corrosion engineers <br /> as superior to polyester resins in solvent related services. With <br /> the addition of methanol, ethanol and other octane promoters, the <br /> use of polyester resins can no longer be trusted in gasoline <br /> storage tanks do to the premature degradation of the resin. <br /> The use of the NSS 37E EPDXY/FRP liner bonded to the interior <br /> surface of the steel storage tank will result in a corrosion <br /> proof liner built within the shell of the .existing tank. This <br /> system will completely bond to the entire tank providing a solid <br /> protective liner, sealing off all leaks providing the following <br /> specifications are met by the applicator. <br /> INDUSTRIAL THERMOPLASTIC and FRP - LININGS - REPAIRS - COATINGS -TANKS - FITTINGS <br /> SPECIALTY FABRICATION - PLATING SYSTEMS - AIR POLLUTION CONTROL SYSTEMS <br />