Aboveground Vertical Double-Wall UL-142:

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UL-142 Aboveground Vertical Double-Wall
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Highland Vertical Double-wall UL-142 aboveground steel storage tanks provide safe
storage of flammable and combustible liquids using minimal space. Double-wall UL-142
tanks provide secondary containment for both bottom and shell (wall) surfaces maintaining
a single-wall top. The outer shell is seal-welded to the inner shell, just below the top head.
Emergency vent fittings are provided for the inner and outer tanks. Standard tanks come
with a flat top and can be specified with a flat, coned or dished bottom. They can be
manufactured from mild carbon or stainless steel and are available with a double bottom.