SEC I] [[_____] WELDING] and AWS Z49.1.
3.1.3
Painting
Equipment shall be factory finished to withstand the intended end use
environment in accordance with the specifications for the particular end
item. Field paint equipment not factory finished as specified herein.
Retouch damaged areas of factory-finished equipment on which finish has
been damaged and then give a complete finish coat to restore the finish to
its original condition. The finish coat shall be suitable for exposure in
the intended end use environment. Spray painting shall comply with OSHA 29
CFR 1910-SUBPART D.
3.1.3.1
Cleaning and Application
Remove dirt, rust, oil, and grease by wire brushing and solvent degreasing
prior to application of paint. Apply paint to clean and dry surfaces only.
Where more than one coat of paint is specified, apply the second coat
after the first coat is thoroughly dry. Retouch damaged painting before
applying the succeeding coat. Finished surfaces shall be smooth. The
painting of zinc coated and other corrosion-resistant metal surfaces is not
required unless otherwise specified herein.
3.1.3.2
Smoke Flues, Boiler Casing, and Draft Ducts
In unfinished areas, paint smoke flues, boiler casing, and black steel
draft ducts with heat-resisting aluminum paint, two coats on the inside of
flues and ducts and one coat on the outside, each coat to a minimum dry
film thickness of 0.025 mm one mil applied directly to clean bare metal
surfaces. Paint exposed surfaces of protective metal covering over
insulation, including zinc-coated surfaces, with two coats of
heat-resisting black paint to a minimum dry film thickness of 0.05 mm two
mils applied directly to the clean bare metal surfaces. Do not paint
zinc-coated ducts.
3.1.4
Boiler Cleaning
After installation, boil out [the] [each] boiler, under supervision of the
manufacturer, with a soda ash or another alkaline cleaning solution to
cleanse internal surfaces of oil, grease, mill scale, and dirt. Dispose of
the waste products from this process according to the requirements of the
applicable federal, state, and local environmental regulations. Following
initial cleaning, the boilers should be flushed, drained, washed down
(internally and externally) and reinspected to ensure that no traces of oil
or foreign matter are present. Next, drain the boiler and associated
piping and refill it with treated, softened water. At all times after
initial cleaning, the Contractor shall protect the boiler, tanks, and
piping against internal corrosion until testing is completed and the
boiler[s] [is] [are] accepted. Provide chemicals, labor for introducing
chemicals, and professional services for control and supervision of the
treatment process.
3.1.5
Marking
Equipment, switches, motor controllers, and other controls or indicating
elements not located on the main control panel shall be identified by
stencils or printed, stamped, or manufactured signs of rigid plastic or
non-ferrous material. Lettering for identification signs shall be not less
than [4.80] [_____] mm [3/16] [_____] inch high. The nomenclature and
SECTION 15517N
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