MIL-HDBK-1005/16
4.2.3
Environmental Considerations (Corrosion, Freeze
Protection). For ship-to-shore connections, ductile iron sewer
pipe, pier castings, and submerged and nonsubmerged exposed metal
such as structural steel members, gratings, angles, pipe support
hangers, fastening devices, and other appurtenances, use two-
coat, coal-tar epoxy coating, conforming to Steel Structures
Painting Council (SSPC) Paint No. 16, applied to total minimum
dry film thickness of 16 mils (0.4 mm). For alternative
corrosion protection coatings for different environments, refer
to MIL-HDBK-1110, Paints and Protective Coatings for Facilities.
Brush bare steel surface to remove all mill scale before applying
the protective coating. Follow manufacturer's instructions for
surface preparation and application to other materials. Evaluate
the need for cathodic protection.
The following are references for cathodic protection:
a)
MO-307, Corrosion Control
b)
NFGS-13110, Cathodic Protection by Galvanic Anodes
c)
NAVFAC letter (LTR) 11012, Cathodic Protection
Systems, Interim Technical Guidance
See Figure 5 and refer to Naval Civil Engineering
Laboratory (NCEL) Report No. R-593, Freeze Protection for
Freshwater and Sanitary Piping Under Open Piers. Pipes installed
under piers or wharfs in any geographic location must be
protected from wave action and floating objects. If freeze
protection is provided, protective jacketing of the insulation
using aluminum, stainless steel, or coal-tar epoxy coated steel
must be provided. Provide structural protection for the entire
length of pipe run in addition to jacketing. Use steel cage of
fabricated shapes or a catwalk for both access and piping
protection.
a)
Pipes installed under piers north of
Philadelphia, PA, and Seattle, WA, and in northern inland and
Great Lakes areas: install with conductive mineral film electric
heating elements and polyurethane foam insulation.
b)
Pipes installed under piers between and including
Philadelphia, PA; Norfolk, VA; Seattle, WA; and Portland, OR:
install with polyurethane foam insulation. Refer to NCEL R-593
for flushing requirements.
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