c) For aviation turbine fuel applications, require a
primary tank of stainless steel construction.
d) For applications other than aviation turbine fuel
(500 gallons (2000 L) and above), coat the floor and lower 20
inches (500 mm) of carbon steel tanks with a service-approved
coating. A primary tank of stainless steel can be allowed as
an option to coated steel for all applications where
e) Require a reinforced concrete slab foundation and
slope tank to the water draw-off.
f) Require support channels with anchor holes for
earthquake/hurricane restraint tie down.
g) Require steel to be a minimum thickness of 3/16-
inch (5 mm) for the interior carbon steel tank.
h) Require protective bollards in traffic areas.
i) Require the tank to be pressure-tested after
ABOVEGROUND VERTICAL STORAGE TANKS
General Design Considerations. Provide cylindrical
single-wall steel aboveground vertical storage tanks meeting
one of the following criteria (as approved by Service
a) Factory-fabricated tanks complying with UL 142
criteria. The diameter of the tanks is limited by
transportation restrictions. Although these tanks are
fabricated in sizes up to 1,200 barrels (191 m3), they become
quite tall due to the diameter limitation. Give special
consideration to height/diameter ratio to ensure tank
b) Field-erected tanks not requiring an internal pan
follow API Std 650 configured as required by this handbook.
Prohibit the use of exterior wind girders, unless required to
meet abnormal local conditions.