MIL-HDBK-1022A
Table 2
APPURTENANCES
Item
Appurtenance
V-A
H-A
H-U
C-E
V-U
bb
Two thermometer wells (except on Air Force
projects) in accordance with Standard Design
AW 78-24-27 not more than 18 inches (450 mm)
apart in each tank. For unheated tanks,
provide a 5 inch (125 mm), bi-metallic, any-
angle dial thermometer with 1-degree divisions
and a range of 0 EF to 150 EF (-18 EC to 66
EC). The second well accommodates
temperature-sensing bulbs for remote reading
temperature systems or temperature control
devices, which are to be provided only when
specifically authorized by SERVICE
HEADQUARTERS. Do not provide any thermometer
wells in tanks with floating pans.
Cable Supports
cc
On the fixed roof of all tanks, provide two
scaffold cable supports in accordance with API
Std 650. Locate the supports near the center
of the tank so that supported cables will have
maximum range and flexibility of operation
with minimum interference with other tank
fittings.
Striker Plates
dd
Striker plates under all openings used for
manual gauging in steel tanks and all openings
in fiberglass tanks.
Monitoring Port
ee
A 2-inch (50 mm) monitoring port including a
tube which provides a means to detect product
leakage from the primary tank into the
secondary tank.
LEGEND:
146
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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