MIL-HDBK-1022A
the ground level. They are only required in high threat areas
within the explosive cordon area or clear zone, Europe, and
the Pacific Region. They are not intended for use in the
CONUS. Design underground vertical steel storage tanks in
accordance with MIL-HDBK-1002/3, except as modified herein.
These standards include tank sizes of 10,000 through 100,000
barrels (1600 m3 through 16 000 m3) capacity. In general, do
not exceed 100,000 barrels (16 000 m3) capacity. Alternative
designs using prefabricated/pre-stressed tank sections must be
approved by the appropriate Service Headquarters. For
European/NATO, Pacific Air Force (PACAF), and CONUS projects,
use the USAFE/NATO standard design, except use double wall
design without fiberglass liner. Review host nation
requirements to determine if deviations are required. Where
circumstances, such as hillside installation, would permit
gravity flow from the underground tank to the point of
discharge, provide a gravity discharge connection. This
option requires approval from the appropriate Service
Headquarters and must include adequate means for stopping flow
in emergency conditions such as fire, power failure,
earthquakes, etc.
8.9
APPURTENANCES. Table 2 describes appurtenances for
atmospheric storage tanks and identifies the type of tank to
which they should be mounted. The following abbreviations are
used:
V-A
=
Vertical Aboveground Storage Tank
H-A
=
Horizontal Aboveground Storage Tank
H-U
=
Horizontal Underground Storage Tank
C-E
=
Aboveground Concrete Encased Storage Tank
V-U
=
Vertical Underground Storage Tank
Full seal weld all tank attachments to prevent
moisture/water from corroding the tank shell and attachments.
8.10
HEATERS
8.10.1
General Design Considerations. Provide tank heaters
and controls for tanks intended for storage of high viscosity
products, such as lube oils, or burner fuels No. 4, No. 5, and
No. 6, in climates where the ambient tank temperature would be
less than 20 degrees F (11 degrees C) above the fuel's pour
point temperature. Heat heavy burner fuel oils and lube oils
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