MIL-HDBK-1022A
c) Provide pressure gauges on both sides of the
strainer or a differential pressure type across the strainer.
d) Provide fusible link safety valves as the first
piece of equipment (in the direction of the flow) on the
loading position. (Valve is not required on Air Force
projects.)
e)
Provide loading connections, controls, valves,
etc., on one
or both sides of the loading platform as
specified by
Service Headquarters. Load tank cars from the
bottom using
counterbalanced, articulated tank car loading
assemblies.
f) Provide
a portable liquid level sensor with
adjustable height at
each loading rack. Wire the sensor so
that it plugs into a
rack-mounted control unit that monitors
the level of fuel in
the tank and stops the flow of fuel to
prevent an overfill.
Provide capability to connect the ground
verification rack to
the rail tank car frame.
g) Provide a system to connect a self-checking
electrical bond between the rack and the tank car. Ensure
that all wiring from the fill control system and the ground
control system is intrinsically safe and approved for use in
hazardous locations. Ensure that loading valves are self-
closing.
h) Provide a two-stage flow control valve with
pressure regulating, check, and flow control features. For
Air Force projects, the control valve usually has an opening
and closing speed control instead of the two-stage flow
control.
3.5
PIPING SYSTEMS.
Refer to Section 9 of this
handbook.
3.6
EQUIPMENT DESCRIPTIONS. The appropriate guide
specification and/or standard design provides specific
information for equipment selection. Make provisions to drain
equipment for maintenance. Accomplish this with hard-piped
drains only when the equipment holds more than 5 gallons (19
L) of fuel or when a pipe which drains to the product recovery
tank is within 12 ft (3.7 m).
50
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