MIL-HDBK-1022A
Table 2
APPURTENANCES
Item
Appurtenance
V-A
H-A
H-U
C-E
V-U
n
Automatic Tank Gauging (ATG) for all tanks
with fuel managed through the Fuels Automated
System (FAS) (as described later in this
section), that complies with API MPMS 3. Key
features include: measures fluid level to
0.05 inch (1 mm); measures standard volume
0.1 percent; measures average product
temperature 1 EF (0.5 EC); measures product
density 1 percent; measures water level from
datum plate 1/4 inch (6 mm); converts volume
to API standard conditions; local tank
readout; provides backup alarms for high,
high-high, low, and low-low level conditions;
American Standard Code for Information
Interchange (ASCII) interface.
o
A 4-inch (100 mm) gauge hatch with drop tube
to within 3 inches (75 mm) of the bottom of
the tank.* A second 4-inch (100 mm) opening
without a drop tube or gauge hatch.
p
One 8-inch (200 mm) flange nozzle for ATG
(planned or future) near the edge of the roof
for ready access from the stairway platform.
q
One 8-inch (200 mm) gauge hatch for water
bottom sampling, as close to the tank center
as possible. See Plate No. 015.
r
One 8-inch (200 mm) gauge hatch with stainless
steel, or fully coated, slotted stilling well
extended to within 3 inches (75 mm) of the
bottom of the tank* for gauging and sampling.
A datum plate to establish a gauging zero
point.
Piping Connection
s
Inlet fill connection. See Plate No. 016,
018, and 019, as applicable.
t
Main suction and low suction. See Plate No.
017.
LEGEND:
143
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
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