3.7
PAINTING
At the factory, blast clean exterior surfaces of the baghouse system to
base metal, SSPC SP 6, including ductwork, manifolds, hoppers, support
structures, and access provisions, and prime and apply two coats of paint,
FS TT-P-28. Surfaces exposed to the flue gas flow need not be painted but
shall be protected during shipment and storage with a rust-protective
coating.
3.8
PROTECTION FROM GALVANIC CORROSION
To prevent against galvanic corrosion, prevent permanent contact of
aluminum casing with copper, copper alloy, tin, lead, nickel, nickel alloy,
and Monel metal. Where it is necessary to attach the casing to carbon
steel or to a low alloy steel, first prime the steel with zinc chromate,
and then paint with aluminum paint, FS TT-P-28. Do not use lead based
paints. Hot-dip galvanize, ASTM A 123, external floor plates, ladders,
grating, stairs, platforms, walkways cages, handrails, kickplates, and
accessories. Floor plate warpage shall not exceed 25 mm one inch for every
3.05 meters 10 feet in any direction.
3.9
PROTECTION FROM INSULATION MATERIALS
Protect equipment and structures from insulation materials. Clean, repair,
and restore equipment and structures to their original state after work is
completed. Replace corroded, discolored, or damaged casing.
3.10
FUNGUS TREATMENT (TROPICAL AREAS ONLY)
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NOTE: Use this paragraph only for projects in
tropical areas with considerable moisture.
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Do not treat components and elements inert to fungi, hermetically sealed,
or of operations adversely affected by the application of varnish, for
moisture and fungus resistance. Treat the electrical connections including
terminals, as follows:
a.
Starter and solenoid coils, except potted coils:
MIL-T-152.
b.
Motor coils which rise in temperature 40 degrees C 104 degrees F
or less: MIL-V-173.
c.
Motor coils which rise in temperatures over 40 degrees C 104
degrees F: Two coats Type AN, Class 105, MIL-I-24092.
Apply coats by the vacuum-pressure, immersion, centrifugal, pulsating
pressure, or buildup method to fill coil interstices and to prevent
entrapped air or moisture. The sealer coat may be applied by brushing or
spraying.
3.11
SCHEDULE
Some metric measurements in this section are based on mathematical
conversion of inch-pound measurements, and not on metric measurements
commonly agreed on by the manufacturers or other parties. The inch-pound
and metric measurements shown are as follows:
SECTION 15863N
Page 48
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