UFC 4-150-02
12 May 2003
Submittals for Government approval, including material lists, should be required for
pumps. Materials generally considered appropriate for salt and brackish waters are as
follows:
MATERIAL
ASTM
UNS
APPLICATION
All wetted parts
316 SS, or
A276*
S31600
316L SS
A276*
S31603
Shafts/Couplings
Nickel-Copper
B164*
N04400
(Monel)
and
B165*
N04400
All wetted parts,
Alum Bronze, or
B148*
C95200
except shafts/cplgs
Ni-Alum Bronze
B148*
C95500
* Full titles for ASTM Standards can be found in Appendix A.
In salt water it is important to avoid dissimilarity of parts. Pumps
constructed of type 316L stainless steel or nickel aluminum bronze with monel shafts
are preferred. In brackish water, cost savings can be realized by allowing acceptably
small dissimilarities. Aluminum bronze pumps with type 316 stainless steel shafts are a
reasonable alternative. The presence of sand/grit must also be considered. Pumps
constructed of stainless steels handle sand/grit better than pumps constructed of bronze
and other copper alloys. However, saline waters corrosion concerns are still
paramount.
3-3.4
Piping and Outlets
3-3.4.1
Size of Mains. Piping systems must be designed to provide the required
residual pressure at the rated design flows to the berths farthest from the pumping
location. Where a common shore pumping and distribution system feeds several piers
or drydocks, the shore distribution system must be sized to deliver the design
firefighting flow to any one of the piers or drydocks while cooling/flushing flows continue
to all other locations.
3-3.4.2
Location and Arrangement of Mains. As a general rule, when
permanent mains are placed on piers 15.24 m (50 ft) or less in width, provide a single
main with branch lateral pipes for outlets on both sides of the pier. For piers wider than
15.24 m (50 ft), provide a main 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. It is normally more desirable operationally to provide a looped main than
an equivalent single main. Provide isolation valves at appropriate locations for reliability
of service during emergency repairs. Segregation valve should be placed in the fire
main loop so that the maximum distance between any two adjoining valves does not
exceed 61 m (200 ft).
3-3.4.3
Location and Spacing of Outlets. The pier location of ships' saltwater
connections are defined in SCDB. Refer to Chapter 2 for a description of the methods
3-18
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