UFC 4-150-02
12 May 2003
3-4.1.2
Repair Berthing. The potable water requirements are defined in SCDB.
Add the quantities indicated for each ship (including nested ships) and that total
available on the pier. Base the peak rate of flow for sizing the main on providing the
entire daily flow requirements defined in SCDB, applied to all ships on a pier or wharf, at
a constant flow rate, within an 8-hour period, and at a residual pressure of 276 kPa (40
psi) minimum at the furthest shore connections. It is noted that this data is based on
114 lpd/man (30 gpd/man).
3-4.1.3
Multiple Piers. Determine total usage for multiple piers by summing daily
flows for all ships at all piers or wharves assuming 114 lpd/man (30 gpd/man).
Determine the peak-flow rate for multiple piers by summing peak-flow rates for all piers
or wharves as determined by the method described above and then multiplied by a
diversity factor of 0.75.
3-4.2
Piping System Design Criteria. For piping materials and installation
requirements, refer to MIL-HDBK-1005/7A, Water Supply Systems. Ductile iron is
typically used for the main lines while PVC or copper is used for branch lines. For
piping under a pier or wharf, evaluate the relative advantages of cement-lined ductile
iron versus cement- lined steel pipe with an extruded polyethylene or polypropylene
exterior coating. Provide an ultra violet inhibitor in polyethylene or polypropylene
coatings exposed to sunlight. For coated pipe, use polyethylene, heat-shrinkable
sleeves and/or tape wrapping at joints and fittings. Type of joint requires particular
consideration. Provide pipe hangers and associated support assemblies in accordance
with paragraph 2-4.1.3. Provide means of pipe movement due to thermal expansion,
preferably by use of expansion loops or offsets. Also, provide for differential movement
of piping at pier expansion joints. Consider effects of transients from waterhammer.
3-4.3
Location and Arrangement of Piping Mains. As a general rule, provide
a single water main with cross-branch piping to outlets for active berthing piers and for
repair piers 15.2 m (50 ft) or less in width. For repair piers wider than 15.2 m (50 ft),
provide piping mains on both sides of the pier with a cross connection at the outboard
end of the pier (loop configuration). Coordinate piping with structural conditions and
arrange mains for the best combination of versatility, security, and overall cost.
Normally, it is more desirable to provide a looped main rather than an equivalent single
main. Provide isolation valves at appropriate locations for reliability of service during
emergency repairs.
3-4.4
Piping and Outlets. See Figure 3-7. Provide at least one 63.5 mm (2-
1/2 in) connection at each service outlet except as specified in paragraph 3-4.6 for large
ship requirements or where nesting is anticipated. Branch piping from mains to outlet
risers should be not less than 63.5 mm (2-1/2 in), and not less than 101.6 mm (4 in)
where dual 63.5 mm (2-1/2 in) connections are fed by a common branch. Terminate
shore connections with a 63.5 mm (2-1/2 in) gate valve with hose threads (national hose
threads) and a chained cap. Provide a reduced-pressure type backflow prevention
device in accordance with MIL-HDBK-1005/7A. Identify and color-code potable water
outlets on piers and wharves in accordance with Chapter 6. If static pressure in supply
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