UL-142 STANDARD SYSTEM DESCRIPTION
'Evolution' Tank, UL-142 Standard.
The most notable feature of the SuperSafe design - the Cylindrical Dike - provides complete protection for the
hazards resulting from aboveground tanks' overflowing due to expansion of stored product and overfilling due to
human error or equipment failure.
The second greatest risk with aboveground
tanks is failed or leaking tank fittings and connected piping. A typical double walled tank cannot provide these
protections - only the SuperSafe Cylindrical Diked Tank can. The SuperSafe enclosed primary tank is built to and
labeled UL-142. The standard joggled joint 
construction is arranged so that
the seams are oriented towards the tank's sump. Butt weld joint construction per ATA-103 is available. The installation
instructions point out a 1/8" per foot slope to be incorporated in the concrete slab construction to ensure
a positive sumping capability. The SuperSafe Tank has a 3/4" sumping pipe installed ½" off the
bottom of the tank's sump. This suction pipe is routed through the top of the tank head, above the liquid level
and then to a closed-loop sumping system. Fuel samples are drawn through a sorbing membrane and returned to storage.
Millipore sampling and water draw-off can be accomplished at the filter vessel as necessary. This process greatly
reduces open fuel handling and waste fuel disposal difficulties.
The SuperSafe Cylindrical Dike's annular
space also has a positive sump. A 2" pipe is routed to the sump vertically, where a fail-safe liquid sensor
is installed. The sensor can be removed and captured liquids extracted through this pipe. The inert interstitial
space's nitrogen purity is inspected bi-annually. This patented and UL-listed assembly will maintain a positive
nitrogen blanket within the interstitial space, eliminating any chance of oxidation or interstitial deterioration.
The SuperSafe Cylindrical Dike is integral to the design and is recognized by UL as such and labeled UL-142 standard.
Most diking goes untested and unlabeled
by other manufacturers, due to failed regulatory interpretation and enforcement. The Cylindrical Dike capacity
is 25 percent greater than the enclosed primary tank. The SuperSafe Tank is designed with longitudinal boxed runner
supports. This feature allows the gross loading to be distributed evenly over a greater area thereby reducing stress
loads to the Cylindrical Dike and the enclosed primary tank. This configuration also provides greater design goals
when complying with seismic standards, flood plain ballasting and site specific conditions.
The SuperSafe Tank exterior finish
is critical - and engineered to last. The exterior is sandblasted to near white SP-6 condition. Within six hours,
two coats of Valspar Epoxy V75-W9 are applied. This 10.0 - 14.0 mils of tank white finish provides an excellent
resistance to the enemies: salt, alkali, petroleum products, moisture and weathering.
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