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3.1
PAINTING OF NEW EQUIPMENT
New equipment painting shall be factory applied or shop applied, and shall
be as specified herein, and provided under each individual section.
3.1.1
Factory Painting Systems
Manufacturer's standard factory painting systems may be provided subject to
certification that the factory painting system applied will withstand 125
hours in a salt-spray fog test, except that equipment located outdoors
shall withstand 500 hours in a salt-spray fog test. Salt-spray fog test
shall be in accordance with ASTM B 117, and for that test the acceptance
criteria shall be as follows: immediately after completion of the test,
the paint shall show no signs of blistering, wrinkling, or cracking, and no
loss of adhesion; and the specimen shall show no signs of rust creepage
beyond 3 mm0.125 inch on either side of the scratch mark.
The film thickness of the factory painting system applied on the equipment
shall not be less than the film thickness used on the test specimen. If
manufacturer's standard factory painting system is being proposed for use
on surfaces subject to temperatures above 50 degrees C 120 degrees F, the
factory painting system shall be designed for the temperature service.
3.1.2
Shop Painting Systems for Metal Surfaces
Clean, pretreat, prime and paint metal surfaces; except aluminum surfaces
need not be painted. Apply coatings to clean dry surfaces. Clean the
surfaces to remove dust, dirt, rust, oil and grease by wire brushing and
solvent degreasing prior to application of paint, except metal surfaces
subject to temperatures in excess of 50 degrees C 120 degrees F shall be
cleaned to bare metal.
Where more than one coat of paint is specified, apply the second coat after
the preceding coat is thoroughly dry. Lightly sand damaged painting and
retouch before applying the succeeding coat. Color of finish coat shall be
aluminum or light gray.
a.
Temperatures Less Than 50 Degrees C 120 Degrees F: Immediately
after cleaning, the metal surfaces subject to temperatures less
than 50 degrees C 120 degrees F shall receive one coat of
pretreatment primer applied to a minimum dry film thickness of
0.0076 mm 0.3 mil, one coat of primer applied to a minimum dry
film thickness of 0.0255 mm one mil; and two coats of enamel
applied to a minimum dry film thickness of 0.0255 mm one mil per
coat.
b.
Temperatures Between 50 and 205 Degrees C 120 and 400 Degrees F:
Metal surfaces subject to temperatures between 50 and 205 degrees C
120 and 400 degrees F shall receive two coats of 205 degrees C
400 degrees F heat-resisting enamel applied to a total minimum
thickness of 0.05 mm 2 mils.
c.
Temperatures Greater Than 205 Degrees C 400 Degrees F: Metal
surfaces subject to temperatures greater than 205 degrees C 400
degrees F shall receive two coats of 315 degrees C 600 degrees F
heat-resisting paint applied to a total minimum dry film thickness
of 0.05 mm 2 mils.
SECTION 15050N
Page 8
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