0.010 inch, smooth surface with factory-applied polyethylene and kraft
paper moisture barrier on inside surface. Provide stainless steel bands,
minimum width of 13 mm 0.5 inch. Provide factory prefabricated stainless
steel covers for insulation on fittings, valves, and flanges.
PART 3
EXECUTION
3.1
INSTALLATION
Obtain Contracting Officer's written approval of piping systems prior to
the application of insulation. Insulation shall be clean, dry, and
installed prior to the application of insulation jacket. Do not use short
pieces of insulation and jacket materials where a full length section will
fit. Provide insulation materials and jackets with smooth and even
surfaces, with jackets drawn tight, and secured on longitudinal and end
laps. Insulate fittings and piping accessories with premolded, precut, or
field-fabricated pipe insulation of the same pipe insulation material and
thickness as the adjoining pipe insulation. Provide unions, flanges,
valves, and piping accessories with removable (snap-on) sections of
insulation. Provide insulation continuous through pipe hangers and pipe
supports. Do not step on or walk on insulation or jacket.
3.2
PIPING INSULATION
3.2.1
Fibrous Glass Pipe Insulation
Install in accordance with the manufacturer's recommendations.
3.2.2
Mineral Fiber Pipe Insulation
Install in accordance with the manufacturer's recommendations.
3.2.3
Calcium Silicate Pipe Insulation
Install in accordance with the manufacturer's recommendations, except as
modified herein. Secure with not less than 9.50 mm 0.375 inchwidth fibrous
glass reinforced waterproof tape or stainless steel bands spaced not more
than 200 mm 8 inches on centers. Provide one layer of asphalt-saturated
felt over the insulation prior to installing aluminum jacket.
Factory-applied polyethylene and kraft paper moisture barrier will not be
permitted as a substitute for the asphalt-saturated felt.
3.2.4
Cellular Glass Pipe Insulation
Install as specified for calcium silicate pipe insulation.
3.2.5
Polyurethane and Polyisocyanate Pipe Insulation
Install only on aboveground pumped condensate (hot water) return piping in
accordance with the manufacturer's recommendations.
3.2.6
Mineral Fiber Pipe Wrap Insulation
Install in accordance with the manufacturer's recommendations.
3.3
INSULATION JACKET
Provide new piping insulation and existing piping insulation affected by
Contractor's operations with aluminum jacket. Machine cut the jacket to
SECTION 15081N
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