MIL-HDBK-1022
other systems, test with water. Ensure that all water is
removed from piping by either pigging the lines or subsequent
flushing with fuel.
e) Lay out piping between piers and storage tanks,
cross-country pipelines, and between bulk storage and
operating tanks to accommodate pigging operations. Use long
radius heads, full port valves, and provisions for the
connection of temporary launchers and receivers. Refer to
Corps TM 5-803-7 and AFMAN 32-1013 for design guidance. Give
special consideration to smart pigging for single wall
pipelines.
f) When laying out piping for single wall A/C
hydrant systems, consider smart pigging/pigging in the design.
For systems with required piping slopes and high and low level
drains, provide long radius turns, and provide spool pieces
for temporary pig launchers and receivers. Ensure valves are
accessible for removal and replacement with spool pieces.
Where it is more economical or practical to lay hydrant piping
flat (slope less than .2 percent), provide the capability to
rapidly clean the lines with a pig or to launch a smart pig.
This includes providing long radius turns, full port valves,
and pig launchers and receivers.
g) Refer to Corps TM 5-852 series for construction
of aboveground and underground piping in arctic and subarctic
conditions.
9.1.1.1
Hydraulic Design. In general, provide a hydraulic
design with a velocity of 7 to 12 feet per second (2.1 to 3.7
m/s) on pump discharge and 3 to 5 feet per second (0.9 to 1.5
m/s) on pump suction at full flow. If project-specific
conditions make it advisable to exceed these values, consult
the appropriate Service Headquarters. Design suction piping
to ensure that the net positive suction head required by the
pumps is available under all conditions of operation.
Consider the following factors in selecting pipe sizes:
a) Operating requirements of the facility to be
served.
b) Capital cost of the pipe.
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