TranSystems Corporation - LGM Construction

501070099 Federal Express Oakland Sort Expansion Issued for Bid 10/11
A. Flexible elastomer sheet insulation shall be a closed cell foamed elastomer having a density range
of 3.0 – 6.0 lbs. per cu.ft., shall have a thermal conductivity of 0.28 BTU-In/Hr-Sq Ft-Deg F at 75
Deg F mean temperature, and shall have a permeability of not greater than 0.08 perm-inches.
B. Insulation shall be AP/Armaflex Sheet and Roll Insulation as manufactured by Armacell.
C. Adhesive for adhering flexible elastomer to sheet metal (outside duct only), and for adhering all
seams and joints shall be rubber based contact adhesive, Armacell 520 or 520 BLV.
2.6 PVC SHEET JACKET
A. All insulation where specified or otherwise shown on the Drawings shall have a jacket of PVC
sheet material. Jacket material shall be 30 mil thick, have a permeability to water vapor of not
greater than .012 perm-in., and be non-toxic, odorless, and resistant to corrosion and exposure.
B. Color of PVC jacket shall be white.
C. Jacket shall be as manufactured by Ceel-Co, or similar by Johns Manville - Zeston, Certain-Teed
or Speed Line Manufacturing Co.
2.7 PVC TAPE
A. PVC tape shall be a 10 mil minimum thickness polyvinyl chloride pressure sensitive tape, 2" in
width, as manufactured by Speed Line, or similar by Proto.
2.8 INSULATION PROTECTION SADDLES AND SHIELDS
A. Insulation protection saddles and shields shall be provided and installed by the Contractor at all
pipe hangers and supports for insulated lines.
B. All insulation protection shields shall be rolled with a true radius to suit the insulation O.D. Prime
galvanized sheet metal shall be used for all shields. The shields shall be sized to wrap the
insulation in an arc between 120 Deg and 180 Deg. The shields shall be anchored to the pipe
insulation with no less than two bands per shield. Bands shall be stainless steel, aluminum, or
galvanized steel matching insulation jackets where applicable.
C. The schedule for the shields shall be as follows:
Pipe Size Shield Gauge
Shield Length
(Inches) (Inches)
2 and smaller 16 8
2-1/2 and 3 14 10
4 14 12
5 and 6 12 14
8, 10, and 12 12 16
D. Pipe insulation saddles shall be fabricated from calcium silicate or high density pre-compressed
fiberglass pipe insulation. Calcium silicate saddles shall not be used on cold water piping systems.
Saddles may be polyisocyanurate or extruded polystyrene where similar materials are specified for
adjoining pipe insulation. Saddle shall be minimally 1/2 section of pipe insulation placed in pipe
INSULATION 15250-3