HomeMy WebLinkAbout200250 MECHANICAL INSULATIONTHE KENT
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THE KENT Issue Date 05.09.18 MECHANICAL INSULATION
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SECTION 20 02 50 - MECHANICAL INSULATION
PART 1 - GENERAL
1.01 RELATED SECTIONS:
A. Drawings, general provisions of the Contract, including General and Supplementary
Conditions, and Division-1 Specification Sections and Division 21, 22, and 23 Specification
Sections, apply to work of this Section.
B. This section applies to Division 21, 22 and 23 Specification Sections.
1.02 DESCRIPTION OF WORK:
A. Furnish and install thermal insulation materials and accessories for mechanical systems as
specified. Extent of mechanical insulation work required by this Section is indicated on
drawings, schedules and by requirements of this Section. Lack of specific notation on the
drawings however, does not relieve the Contractor of the responsibility for fully insulating all
piping, ductwork, and equipment as herein specified.
B. Types of mechanical insulation specified in this Section include the following:
1. Piping System Insulation:
a. Fiberglass
b. Flexible Unicellular
2. Ductwork System Insulation:
a. Fiberglass
3. Exterior Duct and Pipe Covering
a. Foil/film Facing
1.03 QUALITY ASSURANCE:
A. Reference Standards:
1. NFPA 255 - Standard Method of Test of Surface Burning Characteristics of Building
Materials.
a. Flame/Smoke Ratings: Provide composite mechanical insulation (insulation,
jackets, coverings, sealers, mastics and adhesives) with flame-spread index of
25 or less, and smoke-developed index of 50 or less, as tested by ASTM E84
(NFPA 255) method.
b. Exception: Mechanical insulation installed outdoors may have flame spread
index of 75 and smoke developed index of 150.
2. National Commercial & Industrial Insulation Standards – Latest Edition
3. International Energy Conservation Code.
B. Installer's Qualifications: Firm with at least 5 years of successful installation experience on
projects with mechanical insulations similar to that required for this project.
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1.04 SUBMITTALS:
A. Product Data:
1. Submit manufacturer's technical product data and installation instructions for each type
of mechanical insulation.
2. Submit schedule showing manufacturer's product number, k-value, thickness, density
in Ibs./cu. ft., and furnished accessories for each mechanical system requiring
insulation.
B. Where specified herein, submit manufacturer's sample of each piping, ductwork, and
equipment insulation type required. Affix label to sample which completely describes product
sample.
C. Submit maintenance manuals in accordance with Division 1specification requirements:
1. Maintenance manuals shall include the following:
a. Maintenance data
b. Replacement material lists for each type of mechanical insulation provided.
1.05 DELIVERY STORAGE AND HANDLING:
A. Deliver insulation, coverings, cements, adhesives, and coatings to site in containers with
manufacturer's stamp or label, affixed showing fire hazard indexes of products.
B. Protect insulation against dirt, water, and chemical and mechanical damage. Do not install
damaged or wet insulation, or insulation that has been previously wetted and dried out; remove
from project site.
PART 2 - PRODUCTS
2.01 ACCEPTABLE MANUFACTURERS:
A. Insulation Manufacturers: Subject to compliance with requirements, manufacturers offering
products which may be incorporated in the work include the following. The products of only one
manufacturer shall be used for each particular insulation application.
1. Aeroflex, USA (Aerocell EPDM)
2. Armacell engineered foams (Armaflex)
3. CertainTeed Corp.
4. ITW Insulation Systems Trymer Green Phenolic insulation
5. Fibrex
6. Knauf Insulation
7. Johns-Manville
8. Manson Insulation Corporation
9. Owens-Corning Fiberglass Corp.
10. Pittsburgh Corning (Foamglas)
11. Rubatex International, LLC
B. Exterior Foil/Film Facing
1. Venture Tape Corporation VentureClad 1577CW
2. Permaguard Alumaguard Lite Silver
3. Knauf Redi-Klad 1000 Pipe insulation
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2.02 PIPING INSULATION MATERIALS:
A. Fiberglass Piping Insulation: ASTM C547, Class 3 for use to 850 degrees F.
1. Fibrous glass insulation, long glass fibers bonded in a thermosetting resin, 0.24
Btu•inch/sq. ft./°F/hour maximum “k” factor at 75°F differential, 3/4 pound per cubic
foot minimum density, ASTM C547.
2. Factory-applied vapor barrier jacket consisting of high density, white kraft bonded to
aluminum foil and reinforced with fiberglass yarn.
3. Insulation shall include pressure sensitive longitudinal laps and butt strips for sealing of
all seams
B. Flexible Unicellular Piping Insulation: ASTM C534, Type I or Type II. (For use between -40
degrees F and 220 degrees F only.)
1. Elastomeric foam insulation, flexible, closed-cell construction, 0.27 Btu•inch/sq.
ft./°F/hour maximum “k” factor at 75°F differential
2. 6 pound per cubic foot density, 0.20 perm maximum water vapor transmission,
physically and chemically stable from -40°F to 220°F, ASTM C534, Type I - tubular or
Type II - sheet.
C. Jackets for Piping Insulation: ASTM C 1136 for all piping except flexible unicellular and
polyisocyanurate.
1. TYPE I - VAPOR BARRIER; (ASJ ALL SERVICE JACKET.)
D. Fitting Covers:
1. Encase pipe fittings insulation with one-piece premolded PVC fitting covers, fastened
as per manufacturer's recommendations. (not required for flexible unicellular
insulation.)
2. Under Premolded PVC fitting coverings, wrap two separate layers of blanket insulation
to provide same thickness and density as adjacent pipe covering.
a. Mitered segments of pipe insulation are also acceptable for fittings under PVC
fitting covers when installing fiberglass insulation.
b. Install mitered or premolded insulation when installing calcium silicate or
cellular foam glass insulation. Wrap calcium silicate mitered fittings with 8 oz,
glass cloth.
c. General Note: If a Premolded PVC fitting is found crushed or indented after
installation and the filler material, upon inspection, is found to be out of
specification, the Insulation Contractor shall, at no charge to the Owner,
remove any other PVC fitting covers, directed by the Engineer on any other
specified pipe systems for visual inspection, repair and replace all out of
specification fitting fillers and then re-install all fitting covers.
3. Systems using Polyisocyanurate insulation shall use preformed insulation of the same
manufacturer.
E. Staples and Cement:
1. As recommended by insulation manufacturer for applications indicated.
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F. Adhesives Sealers and Protective Finishes:
1. As recommended by insulation manufacturer for applications indicated.
2.03 DUCTWORK INSULATION MATERIALS:
A. Flexible Fiberglass Ductwork Insulation: ASTM C553, Type I, Class B-3, FSK facing.
1. Flexible fiberglass blanket insulation, 0.27 Btu•inch/sq. ft./°F/hour maximum “k” factor
at 75°F differential
2. 1 pound per cubic foot minimum density, ASTM C553, Type I, with 0.002” aluminum
reinforced foil-scrim-kraft (FSK) jacket suitable for use to 250 degrees F.
B. Jackets for Ductwork Insulation: ASTM C 1136 for all ductwork.
1. TYPE I - VAPOR BARRIER, FOIL SCRIM KRAFT, (FSK)
C. Ductwork Insulation Accessories:
1. Provide pins, washers, tape, and similar accessories as recommended by insulation
manufacturer for applications indicated.
2.04 EXTERIOR DUCTWORK, PIPING, AND EQUIPMENT:
A. Foil/Film Facing for ductwork
1. Jacketing shall be a five-ply laminated foil/film facing for exterior applications. Product
shall be a five-ply laminate alternating layers of aluminum foil (core and outer layers)
with two layers of polyester film. Substrate thickness shall be not less than 3.0 mils
and the adhesive thickness shall be not less than 2.0 mils.
2. Product shall be coated with cold weather acrylic, pressure sensitive adhesive system
suitable for application in below freezing temperatures.
3. Laminate construction shall be highly puncture and tear resistant and flame retardant.
Product shall be suitable for application between –10ºF and 248ºF. Product shall be
suitable for use at temperatures up to 300ºF.
4. All joints shall be sealed with manufacturer’s recommended joint tape.
5. Provide in silver or natural aluminum color finish.
6. Product shall carry a ten-year warranty.
PART 3 - EXECUTION
3.01 INSPECTION:
A. Examine areas and conditions under which mechanical insulation is to be installed. Do not
proceed with work until unsatisfactory conditions have been corrected in manner acceptable to
installer.
3.02 PLUMBING PIPING SYSTEM INSULATION:
A. Insulation Omitted: Omit insulation on chrome-plated exposed piping (except for handicapped
fixtures), air chambers, unions, strainers, check valves, balance cocks, flow regulators, buried
piping, fire protection piping, and pre-insulated equipment.
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B. Cold Water, Hot Water, Sanitary and Storm Piping:
1. Application Requirements: Insulate the following hot and cold plumbing piping systems:
a. Potable cold-water piping.
b. Potable hot water piping within 10 feet of water heater per Plumbing Code.
c. Potable hot water recirculating piping.
d. Interior above-ground horizontal sanitary waste piping receiving condensate
(from an air handling unit) from floor drain to first vertical drop.
e. Interior above-ground horizontal storm water piping from roof and overflow
drains to first vertical drop.
f.
2. Insulate each piping system specified above with one of the following types and
thicknesses of insulation:
a. Fiberglass:
(1) Above-ground cold water, horizontal sanitary and storm piping:
(i) 1" thick.
(2) Hot water, hot water recirculating piping:
(i) 1" thick for pipe sizes through 2"
(ii) 1-1/2" thick for pipe sizes 2-1/2" and larger.
b. Flexible Unicellular:
(1) Above-ground cold water, horizontal sanitary and storm piping:
(i) 1/2" thick.
(2) Tubing type for cold water, hot water and hot water recirculating
piping:
(i) 1/2" thick for pipe sizes through 2".
(3) Sheet type for storm roof drain bodies and sump pans
(i) 1/2" thick.
3.03 DUCTWORK SYSTEM INSULATION:
A. Insulation Omitted: Do not insulate indoor lined ductwork except as otherwise noted below.
B. The specifications below apply when ductwork is round or unlined rectangular. See ductwork
Specification Sections for ductwork to be lined.
C. HVAC Ductwork (Supply and Return):
1. Application Requirements: Insulate the following conditioned air ductwork:
a. Supply ductwork between unit discharge and room terminal outlets when in
exposed location or return air plenum. This work includes unlined plenum
boxes at all slot diffusers.
2. Insulate each ductwork system specified above with the following type and thickness of
insulation:
a. Flexible Fiberglass: 1-1/2" thick, application limited to concealed locations
3.04 INSTALLATION OF PIPING INSULATION:
A. General: Install insulation products in accordance with manufacturer's written instructions, and
in accordance with recognized industry practices to ensure that insulation serves its intended
purpose.
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B. Install insulation on pipe system subsequent to installation of heat tracing, painting, testing, and
acceptance of tests.
C. On heat traced lines, insulation shall be oversized to accommodate the heat trace tubes or
cables.
D. Install insulation materials with smooth and even surfaces. Insulate each continuous run of
piping with full-length units of insulation with single cut piece to complete run. Do not use cut
pieces or scraps abutting each other.
E. As far as possible, all pipe insulation shall be in sectional form. When use of segmental forms
is necessary, segments shall be closely fitted to the curved surfaces to be insulated.
F. Clean and dry pipe surfaces prior to insulating. Butt insulation joints firmly together to ensure
complete and tight fit over surfaces to be covered.
G. Maintain integrity of vapor barrier jackets on pipe insulation and protect to prevent puncture or
other damage. Repair all punctures with ASJ tape designed for duty.
H. Cover valves, fittings and similar items in each piping system with equivalent thickness and
composition of insulation as applied to adjoining pipe run. Install factory molded, precut or job
fabricated units (at Installer's option) except where specific type is indicated.
I. Extend piping insulation without interruption through walls, floors and similar piping
penetrations, except where otherwise indicated.
J. Protection Saddles: Provide insulation shields at each hanger site. Cut and shape insulation to
fit around protection saddles on hot water piping. Saddles to be furnished and installed by
piping trade.
K. Do not insulate unions. Terminate insulation on both sides of unions with 45˚ circumferential
taper and finish with insulating cement.
L. Strainers: Provide removable insulation access sections to permit removal of strainer baskets
without insulation damage. Access sections shall be capable of removal and replacement with
no insulation damage. Access sections shall include metal vessel covers, fasteners, flanges,
frames and any other required accessories.
M. All insulation adjacent to flanges, unions and valves (except water lines subject to sweating)
shall be neatly tapered with vapor barrier cement as required, and neatly finished and sealed to
allow access to and removal of unions, flanges, and bolts without injury to covering. Provide
field-applied jacket to match adjacent insulation jacket.
N. Install 1/2” flexible unicellular insulation on chilled water piping inside terminal unit cabinets.
3.05 INSTALLATION OF DUCTWORK INSULATION:
A. General: Install insulation products in accordance with manufacturer’s written instructions and
in accordance with recognized industry practices to ensure that insulation serves its intended
purpose.
B. Install insulation materials with smooth and even surfaces.
C. Clean and dry ductwork prior to insulating. Butt insulation joints firmly together to ensure
complete and tight fit over surfaces to be covered.
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D. Maintain integrity of vapor-barrier on ductwork insulation, and protect it to prevent puncture and
other damage. Repair all puncture sites with FSK tape designed for the duty.
E. Extend ductwork insulation without interruption through walls, floors and similar ductwork
penetrations, except where otherwise indicated.
F. Lined Ductwork: Except as otherwise indicated, omit insulation on ductwork where internal
insulation or linings have been installed.
3.06 PROTECTION AND REPLACEMENT:
A. Replace damaged insulation which cannot be repaired satisfactorily, including units with vapor
barrier damaged and moisture saturated units.
B. Protection: Insulation Installer shall advise Contractor of required protection for insulation work
during remainder of construction period, to avoid damage and deterioration.
END OF SECTION
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