|
DocuSign Envelope ID: 9826C043- 4C32- 49CD- A4CC- DC28ABAB7CE7
<br />2.8
<br />A.
<br />2.9
<br />A.
<br />B.
<br />2.10
<br />A.
<br />2.11
<br />A.
<br />2.12
<br />A.
<br />2.13
<br />A.
<br />2.14
<br />A.
<br />B.
<br />2.15
<br />A.
<br />2.16
<br />A.
<br />2.17
<br />A.
<br />2.18
<br />A.
<br />B.
<br />C
<br />SECTION 238100 - HVAC INSULATION
<br />water vapor permeability of 0.17 perm inch, maximum water absorption of 6% by weight, rated for
<br />service range of -20 degrees F to 220 degrees F on piping and 180 degrees F where adhered to
<br />equipment.
<br />POLYOLEFIN INSULATION:
<br />Flexible closed cell, minimum nominal density of 1.5 lbs. per cu. ft., thermal conductivity of not more
<br />than 0.24 at 75 degrees F, minimum compressive strength of 5 psi at 25% deformation, maximum
<br />water vapor permeability of 0.0 perm inch, maximum water absorption of 0% by weight and volume,
<br />rated for service range of -165 degrees F to 210 degrees F.
<br />PHENOLIC INSULATION:
<br />Rigid closed cell, minimum nominal density of 2.2 lbs. per cu. ft., thermal conductivity of not more
<br />than 0.13 at 75 degrees F, minimum compressive strength of 31 psi parrallel and 18 psi
<br />perpendicular, maximum water vapor permeability 0.117 perm inch, maximum water absorption of
<br />.5% by volume, rated for service range of -290 degrees F to 250 degrees F.
<br />Kraft reinforced foil vapor barrier laminate all service jacket, factory applied to insulation with a self -
<br />sealing pressure sensitive adhesive lap, maximum permeance of .02 perms and minimum beach
<br />puncture resistance of 50 units.
<br />EXTRUDED POLYSTYRENE INSULATION:
<br />Rigid closed cell, minimum nominal density of 1.6 lbs. per cu. ft., thermal conductivity of not more
<br />than 0.285 at 75 degrees F, minimum compressive strength of 20 psi, maximum water vapor
<br />permeability of 1.5 perm inch, maximum water absorption of .5 % by volume, rated for service range
<br />of -290 degrees F to 165 degrees F.
<br />POLYISOCYANURATE INSULATION:
<br />Rigid closed cell polyisocya nu rate, minimum nominal density of 2.0 (3.0. 4.0, 6.0)Ibs. per cu. ft.,
<br />thermal conductivity of not more than 0.19 at 75 degrees F aged 180 days, minimum compressive
<br />strength of 24 (50, 80, 140)psi parallel and 13 (40, 65, 130)psi perpendicular, maximum water vapor
<br />permeability of 4 perm inch, maximum water absorption of 2% by volume, rated for service range of -
<br />290 degrees F to 300 degrees F.
<br />CELLULAR GLASS INSULATION:
<br />Rigid closed cell, minimum nominal density of 8.5 lbs. per cu. ft., thermal conductivity of not more
<br />than 0.36 at 50 degrees F, minimum compressive strength of 100 psi, maximum water vapor
<br />permeability of 0.0 perm inch, maximum water absorption of .2% by volume, rated for service range
<br />of -450 degrees F to 900 degrees F.
<br />MINERAL WOOL INSULATION:
<br />Rigid preformed mineral fiber, minimum nominal density of 8 lbs. per cu. ft., thermal conductivity of
<br />not more than 0.29 at 200 degrees F, minimum compressive strength of 3 psi, maximum wicking of
<br />1 %, maximum water adsorption of 1 % by volume, rated for service of -120 degrees F to 1200
<br />degrees F.
<br />FIREPROOFING INSULATION:
<br />Mineral fiber with nominal density of 8 lbs. per cu. ft., flame spread index of 25, fuel contribution
<br />index of 0, and smoke developed index of 0, thermal conductivity of not more than 0.23 at 75
<br />degrees F, rated for service of -120 degrees F to 1200 degrees F. Use rigid or semi -rigid board for
<br />duct insulations.
<br />Foil- scrim - polyethylene vapor barrier jacket, factory applied to insulation, maximum permeance of .02
<br />perms.
<br />PVC FITTING COVERS AND JACKETS:
<br />White PVC film, gloss finish one side, semi -gloss other side, FS LP -535D, Composition A, Type II,
<br />Grade GU. Ultraviolet inhibited indoor /outdoor grade to be used where exposed to high humidity,
<br />ultraviolet radiation, in kitchens or food processing areas or installed outdoors. Jacket thickness to be
<br />minimum .02" indoors /.03 "outdoors for piping 12" and smaller, .03" indoors /.04" outdoors for piping
<br />15" and larger.
<br />METAL JACKETS:
<br />.016 inch thick aluminum or .010 inch thick stainless steel with safety edge.
<br />SELF - ADHERING JACKETS:
<br />Self- adhering waterproofing membrane consisting of laminated reflective high density aluminum foil,
<br />high density waterproof polymer films and 40 mil rubberized adhesive asphalt waterproofing
<br />compound with release paper.
<br />INSULATION INSERTS AND PIPE SHIELDS:
<br />Manufacturers: B -Line, Pipe Shields, Value Engineered Products
<br />Construct inserts with calcium silicate or polyisocyanu rate (service temperatures below 300 degrees
<br />F only), minimum 140 psi compressive strength. Piping 12" and larger, supplement with high density
<br />600 psi structural calcium silicate insert. Provide galvanized steel shield. Insert and shield to be
<br />minimum 180 degree coverage on bottom supported piping and full 360 degree coverage on
<br />clamped piping. On roller mounted piping and piping designed to slide on support, provide additional
<br />load distribution steel plate.
<br />Where contractor proposes shop /site fabricated inserts and shields, submit schedule of materials,
<br />thicknesses, gauges and lengths for each pipe size to demonstrate equivalency to
<br />preengi neered/preman ufactu red product described above. On low temperature systems, high density
<br />Reece, Noland & McElrath, Inc. 238100-2 Orange County Board of Elections
<br />Orange Co., NC 05/04/18
<br />
|