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| <<BACK |
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| Fireguard® Tanks Undergo Blast Effects Analysis
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| 3/21/2011
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Recently, and independent firm was contracted to do testing on Steel Tank Institute’s (STI) Fireguard® tanks. Karagozian and Case, a leading firm in research and development efforts encompassing blast and impact testing on conventional and hardened structures, was tasked to perform a Blast Effects Analysis (BEA) for a 2,000 gallon cylindrical aboveground storage tank designed and manufactured by Steel Tank Institute (STI). The primary objective of the BEA was to determine the inherent blast resistance of STI’s design for the aboveground storage tank and identify possible failure modes when it is subjected to various explosive threats.
Fireguard® tanks are thermally protected, double-walled aboveground steel storage tanks. Fireguard® is the best solution for the safe storage of motor fuels and other flammable and combustible liquids aboveground. They are used where a fire-protected tank is needed because of setback limitations or regulatory requirements. Fireguards® pass Two-Hour Pool Fire, Hose Stream, Ballistics/Projectile, and Vehicle Impact tests, earning them an Underwriters Laboratories, UL-2085 label. Fireguard® Tanks are lightweight and come with a 30-year warranty. Each tank is constructed with a minimum three inch interstice around the inner tank, which is completely filled with a lightweight, monolithic material. This high efficiency insulation protects the inner tank in the unlikely event of a fire or extreme heat. It is porous to allow fluid migration through the interstice to the monitoring point.
Now the Fireguard® tank has proven itself in a Blast Effects Analysis. Overall, the BEA indicates that the Fireguard® tank is resistant to the effects of the blast loads considered. The aboveground storage tank was found to resist, with little damage to the primary steel tank, the effects of a 50-pound man-portable improvised explosive device and a 500-pound vehicle-born improvised explosive device at the standoff distances of 5 feet and 20 feet, respectively. These results reflect the response of the tank when it is half-full of fluid. When subjected to the load representative of a typical vapor cloud explosion, the tank performed very well in the analysis with very minor damage to the secondary steel and only localized damage to the primary steel tank. In all three scenarios any minor steel tank damage is not expected to cause primary leakage.
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