substitution request - Alliance Construction Solutions

Insulation shall have jacket with tensile strength of 35 lbs/in and factory applied vapor
barrier jacket with permeability of 0.02 perm with adhesive self-sealing lap joint.
B. Specification “B”, Cellular Glass Piping Insulation: ASTM C-552, Type II, Class 2. “k”
factor shall be maximum of 0.29 at 75° F mean temperature.
C. Specification “C”, Calcium Silicate Piping Insulation: ASTM C-533, Type I. “k” factor shall
be maximum of 0.45 at 500° F mean temperature, compression strength of 200 psi for
5% compression, transverse strength of 200 psi for 5% compression, and minimum
flexural strength of 60 psi.
D. Specification “D”, Thermal Ceramic Insulation: “k” factor shall be a maximum of 1.5 at
1500° F mean temperature, 2000° F temperature limit.
E. Jackets for Piping Insulation: ASTM C-921, Type I for piping with temperatures below
ambient, Type II for piping with temperatures above ambient. Type I may be used for all
piping at Installers option.
1. Fitting Covers: UV-resistant PVC, premolded, with maximum flame spread rating
of 25 and maximum smoke developed rating of 50. Use PVC tape for cold
systems, serrated tacks or PVC tape for hot systems.
2. Aluminum Jacketing: Manufactured from T3003 (or T5005) H14 to H19
aluminum alloy with 3/16” corrugations, and having a factory-attached 1 mil thick
polyethylene moisture barrier continuously laminated across the full width of the
jacketing. Jacketing shall be .016” thick minimum. Provide matching factoryfabricated
covers for 90° and 45° elbows, tee fittings, flange fittings, valve bodies,
blind ends, reducers and other fittings as necessary to make the covering system
complete, waterproof and weatherproof.
3. Cloth Jacketing Material: Not less than 8 oz. per square yard, with adhesives,
cement and sealer as recommended by insulation manufacturer for the intended
application. PVC premolded fitting covers shall not be provided.
F. Piping Insulation Accessories: Provide staples, bands, wires, cements and similar
accessories as recommended by insulation manufacturer for the applications indicated.
G. Piping Insulation Compounds: Provide adhesives, sealers, protective finishes and similar
compounds as recommended by insulation manufacturer for the applications indicated,
and additional finishes as specified.
2.03 DUCTWORK INSULATION MATERIALS:
A. Specification “A”, Rigid Fiberglass Insulation Board, 2” thick: ASTM C-612, Class 1, 450°F
temperature limit, density of 3 lbs. per cu. ft. "k" value shall be maximum of 0.23 at 75°F
mean temperature, facing of 0.7 mil foil reinforced with glass mesh and laminated to 40
lb kraft, with factory applied vapor barrier facing.
B. Specification “B”, Round Surface Semi-Rigid Fiberglass Insulation, 1-1/2” thick: ATSM C-
612, Class 1, 450°F temperature limit, 3 lbs. per cu. ft. density, "k" value of 0.25
maximum at 75° F mean temperature and foil-skrim-kraft facing. Orientation of fibers
shall be perpendicular to facing to facilitate application on round surfaces.
C. Specification “C”, Flexible Fiberglass Ductwork Insulation, 1-1/2” thick, factory applied:
ASTM C-553, Type I, 1.0 lb. per cu. ft. density. “k” value shall be maximum of 0.25 at
Project No.: 10145
550 15 th Street Dual Brand Hotel
03/16/2012
23 0713 - 3 MECHANICAL INSULATION