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Tank Specifications
UL 142 Specification (click for a printer-friendly page)
The intent of this specification is to provide the owner with a "Subbase" type rectangular aboveground UL listed closed top dike double wall fuel storage tank, specifically designed and sized for standby emergency backup generators.
The double wall tank is used when extra protection against fuel leakage to the surrounding environment is desired or required. The double wall tank not only contains fuel leakage from the inner tank, it is also sealed to prevent the entrance of rain and debris.
COM-FAB, INC. manufactures it's double wall tank in two pieces; the inner tank, and the double wall base. The inner tank is made of 12 ga. steel, with 10 ga. baffles... space every 20 inches for added support and rigidity. The tank is completely welded, and pressure tested at 5-7 pig for a minimum of 60 minutes.
The double wall base is made of 10 ga. main rails and 12 ga. top and bottom. There are also 3x4.1 channels below the double wall bottom to separate it from the concrete mounting pad. The double wall base supports all the weight of a generator as well as providing a rupture basin. The weight and vibration carrying part of the base is not mechanically connected to the inner tank, this reduces the risk of fatigue of the inner tank welds. The inner tank and the double wall top are welded together around the tank fittings only, to provide a completely sealed rupture basin. The rupture basin is fully welded, then tested with magna-flux penetrating dye.
The tank comes standard with the following fittings: fill, engine supply, engine return, inner tank drain, rupture basin drain, mechanical gauge, normal and emergency tank vents, and rupture basin vent.
COM-FAB,INC. MANUFACTURES IT'S TANKS TO MEET NFPA 30, 37 AND UL142
COM-FAB Inc. is UL listed under file MH17856 COM-FAB Inc. is listed as an approved equipment supplier for above ground tanks by The Florida Department of Environmental Protection under file EQ-386
UL 2085 Fireguard® Specification (click for a printer-friendly page)
Fireguard®, a Fire-Rated, Lightweight Double Wall Steel Aboveground Storage Tank.
The Fireguard® Thermally Insulated Aboveground Storage Standard is based on the application of sound engineering principles and the combined experience of STI membership, which includes state of-the-art manufacturing considerations. It represents a composite of input from users, regulatory authorities, manufacturers, and consultants. Fireguard® represents the second generation of thermally protected aboveground storage tanks with its unique double wall and insulated design. Other designs have relied upon costly, heavy materials such as concrete to provide secondary containment and insulation. However, Fireguard® uses three inches of lightweight monolithic thermal insulation between the two walls of steel to minimize heat transfer from the outer tank to the inner tank.
The thermal insulation material is a composition of perlite, cement, water and special ingredients carefully mixed to standardized proportions. The light weight of the completed tank unit eases relocation on projects that demand additional fire protection.
The Fireguard® design responds to the latest demands of the fuel and chemical storage marketplace where fire-rating, environmental safety and relocation are primary concerns.
The Fireguard® fuel-storage design provides secondary containment to prevent spillage or pool fires as well as both thermal insulation and emergency venting for a two-hour fire rating. A two-hour fire rating signifies that the structural integrity of the tank will not be compromised, for at least two hours, if a fire were to surround the tank system. The secondary containment provides 110 percent containment of the primary tank’s capacity.
The steel outer wall of the tank is coated to prolong the Fireguard® tank’s weather resistance and to further reduce maintenance needs.
Fireguard® tanks are built in accordance with Steel Tank Institute Publication No. F941, “Standard for Thermally Insulated Above-ground Storage Tanks.” Tank capacities can be specified from less than 200 gallons to 5000 gallons. Smaller capacities typically provide greater ease of relocation.
Fireguard is a registered trademark of the Steel Tank Institute. Fireguard tanks are built by licensed members of STI.
Double Wall Specification (click for a printer-friendly page)
Used when the customer requires tanks outside of the UL 142 restrictions, but use the same general construction as our UL 142 tanks.
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