HomeMy WebLinkAbout200250 MECHANICAL INSULATION.pdfL’Acquis Number: 12056
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Matt the Miller's Tavern
Carmel, Indiana
Project No. 12056 MECHANICAL INSULATION 20 02 50 � 1
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. Polyisocyanurate
c. Calcium Silicate
d. Cellular Glass
e. Flexible Unicellular
2. Ductwork System Insulation:
a. Fiberglass
b. Fire Rated Inorganic Duct Wrap
3. Equipment Insulation:
a. Fiberglass
b. Calcium Silicate
c. Mineral Wool
d. Flexible Unicellular
4. Exterior Duct and Pipe Covering
a. Aluminum Jacket
b. Foil/film Facing
1.03 QUALITY ASSURANCE:
A. Reference Standards:
1. NFPA 255 � Standard Method of Test of Surface Burning Characteristics of
Building Materials.
L’Acquis Number: 12056
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Matt the Miller's Tavern
Carmel, Indiana
Project No. 12056 MECHANICAL INSULATION 20 02 50 � 2
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 successful installation experience on
projects with mechanical insulations similar to that required for this project.
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:
L’Acquis Number: 12056
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Matt the Miller's Tavern
Carmel, Indiana
Project No. 12056 MECHANICAL INSULATION 20 02 50 � 3
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. Armacell engineered foams (Armaflex)
2. CertainTeed Corp.
3. ITW Insulation Systems Trymer Green Phenolic insulation
4. Fibrex
5. Knauf Insulation
6. Johns�Manville
7. Manson Insulation Corporation
8. Owens�Corning Fiberglass Corp.
9. Pittsburgh Corning (Foamglas)
10. Rubatex International, LLC
B. Fire Rated Inorganic Duct Wrap
1. Thermal Ceramics Firemaster XL ESR�2213
2. Thermal Ceramics Pyroscat XL ESR�2832
3. Unifrax Fyrewrap Max. 2.0 ESR�2224
4. 3�M FireBarrier 20A ESR�1255
C. Exterior Foil/Film Facing
1. Venture Tape Corporation VentureClad 1577CW
2. Permaguard Alumaguard Lite Silver
3. Knauf Redi�Klad 1000 Pipe insulation
D. PVC Fitting Covers
1. Zeston 2000
2. Proto Exotuff
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. Polyisocyanurate Piping Insulation:
L’Acquis Number: 12056
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Matt the Miller's Tavern
Carmel, Indiana
Project No. 12056 MECHANICAL INSULATION 20 02 50 � 4
1. Polyisocyanurate 0.15 Btu•inch/sq. ft./°F/hour at 75°F mean temperature.
2. 2.5 pounds per cubic foot minimum density.
3. Surface burning characteristics
a. Flame Spread index: 25 maximum
b. Smoke Developed index: 50 maximum
4. Water Vapor Permeability: 0.9 perm�inch.
5. Integral 6�mil vapor retarder film jacket, Saran 540CX or 560CX.
C. Cellular Glass Piping Insulation: ASTM C522
1. Cellular glass 0.35 Btu•inch/sq. ft./°F/hour maximum “k” factor at 75°F
differential
2. 8.0 pound per cubic foot minimum density.
D. Calcium Silicate Piping Insulation: ASTM C533, Type I.
1. Hydrous calcium silicate, asbestos free, 0.40 Btu•inch/sq. ft./°F/hour maximum
“k” factor at 300°F differential
2. 15 pound per cubic foot minimum density, ASTM C533, Type I, in sectional
blocks or halves for use to 1200 degrees F.
E. 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.
F. Jackets for Piping Insulation: ASTM C 1136 for all piping except flexible unicellular and
polyisocyanurate.
1. TYPE I � VAPOR BARRIER; (ASJ ALL SERVICE JACKET.)
G. 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.
L’Acquis Number: 12056
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Matt the Miller's Tavern
Carmel, Indiana
Project No. 12056 MECHANICAL INSULATION 20 02 50 � 5
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.
H. Staples and Cement:
1. As recommended by insulation manufacturer for applications indicated.
I. Adhesives Sealers and Protective Finishes:
1. As recommended by insulation manufacturer for applications indicated.
2.03 DUCTWORK INSULATION MATERIALS:
A. Rigid Fiberglass Ductwork Insulation: ASTM C612, Class 1, Foil Scrim Kraft (FSK)
Facing.
1. Rigid fiberglass ductwork insulation, 0.23 Btu•inch/sq. ft./°F/hour maximum “k”
factor at 75°F differential
2. 3 pound per cubic foot minimum density, ASTM C612, Class 1, with barrier
jacket constructed of FSK laminated to fire resistive kraft suitable for use to 450
degrees F.
B. Semi�Rigid Fiberglass Duct Insulation for Round and Flat Oval Ductwork: ASTM C
612, Type I, FSK facing.
1. Semi�Rigid fiberglass ductwork insulation, 0.23 Btu•inch/sq. ft./°F/hour
maximum “k” factor at 75°F differential
2. 3 pound per cubic foot minimum density, ASTM C612, Class 1, with barrier
jacket constructed of FSK laminated to fire resistive kraft suitable for use to 450
degrees F.
C. 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.
D. Fire Rated Inorganic Duct Wrap ASTM E 84, ASTM 814, UL 723
L’Acquis Number: 12056
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Matt the Miller's Tavern
Carmel, Indiana
Project No. 12056 MECHANICAL INSULATION 20 02 50 � 6
1. Refractory ceramic blanket used as a fireproof covering or wrap.
2. 1.5” or 2” thickness suitable for service to 2300 degrees F.
3. Installed in two layers in accordance with ASTM E2336 for grease duct service.
E. Jackets for Ductwork Insulation: ASTM C 1136 for all ductwork.
1. TYPE I � VAPOR BARRIER, FOIL SCRIM KRAFT, (FSK)
F. Ductwork Insulation Accessories:
1. Provide pins, washers, tape, and similar accessories as recommended by
insulation manufacturer for applications indicated.
2.04 EQUIPMENT INSULATION MATERIALS:
A. Rigid Fiberglass Equipment Board Insulation: ASTM C612, Class 3 FSK Facing.
1. Rigid fiberglass ductwork insulation, 0.23 Btu•inch/sq. ft./°F/hour maximum “k”
factor at 75°F differential
2. 3 pound per cubic foot minimum density, ASTM C612, Class 3, with barrier
jacket constructed of FSK laminated to fire resistive kraft suitable for use to 850
degrees F.
B. Semi�Rigid Fiberglass Equipment Insulation for Round Vessels: ASTM C 612, Class 3,
FSK or ASJ facing
1. Semi�Rigid fiberglass ductwork insulation, 0.23 Btu•inch/sq. ft./°F/hour
maximum “k” factor at 75°F differential
2. 3 pound per cubic foot minimum density, ASTM C612, Class 3, with barrier
jacket constructed of FSK laminated to fire resistive kraft suitable for use to 650
degrees F.
C. Calcium Silicate Equipment Insulation: ASTM C533, Type I
1. Hydrous calcium silicate, asbestos free, 0.40 Btu•inch/sq. ft./°F/hour maximum
“k” factor at 300°F differential.
2. 15 pound per cubic foot minimum density, ASTM C533, Type I, in sectional
blocks for use to 1200 degrees F.
D. Mineral Wool: ASTM C547 Type I and II (For use between �120 degrees F and 1,200
degrees F)
1. Premolded mineral fiber insulation, asbestos free, 0.482 Btu•inch/sq. ft./°F/hour
maximum “k” factor at 500°F differential.
E. Elastomeric Foam Insulation: ASTM C534, Type II. (For use between �40 degrees F and
220 degrees F only.)
L’Acquis Number: 12056
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Matt the Miller's Tavern
Carmel, Indiana
Project No. 12056 MECHANICAL INSULATION 20 02 50 � 7
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 II �
sheet.
F. Protective Jackets:
1. Interior Applications:
a. Canvas jacket: UL listed fabric, 6 ounces per square yard, plain weave
cotton fabric treated with dilute fire retardant lagging adhesive.
b. Glass jacket: 7.8 ounces per square yard, glass cloth material, untreated,
with mastic finished smooth.
G. Equipment Insulation Compounds:
1. Provide adhesives, cements, sealers, mastics and protective finishes as
recommended by insulation manufacturer for applications indicated.
H. Equipment Insulation Accessories:
1. Provide staples, bands, wire, wire netting, tape, corner angles, anchors and stud
pins as recommended by insulation manufacturer for applications indicated.
2.05 EXTERIOR DUCTWORK, PIPING, AND EQUIPMENT
A. Aluminum Jacket:
1. Jacketing: 0.016” thick smooth or embossed aluminum sheet, with longitudinal
slip joints and 2 inch laps.
2. Pipe fitting covers: 0.24” thick, two piece, factory fabricated aluminum covers.
B. 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 fur 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.
L’Acquis Number: 12056
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Matt the Miller's Tavern
Carmel, Indiana
Project No. 12056 MECHANICAL INSULATION 20 02 50 � 8
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, drainage piping located in crawl spaces or tunnels, buried piping, fire
protection piping, and pre�insulated equipment.
B. Hot and Cold Piping:
1. Application Requirements: Insulate the following hot and cold plumbing piping
systems:
a. Potable cold water piping
b. Potable hot water piping
c. Potable hot water recirculating piping
d. Potable chilled water piping
e. Non�potable cold water piping
f. Interior above�ground horizontal sanitary waste piping receiving
condensate from an air handling unit from floor drain to first vertical
drop.
g. Interior above�ground horizontal storm water piping from roof head to
first vertical drop.
2. Insulate each piping system specified above with one of the following types and
thicknesses of insulation:
a. Fiberglass:
(1) Storm drains and cold water
(i) 1" thick.
(2) Hot water, Hot water recirculating lines
(i) 1" thick for pipe sizes through 2"
(ii) 1�1/2" thick for pipe sizes 2�1/2" and larger.
b. Flexible Unicellular:
(3) Tubing type for cold water and hot water
(i) 1/2" thick for pipe sizes through 2".
(4) Sheet type for storm roof drain bowls and sump pans
(i) 1/2" thick.
3.03 HVAC PIPING SYSTEM INSULATION:
A. Insulation Omitted: Omit insulation on hot piping within radiation enclosures or unit
cabinets; on cold piping within unit cabinets provided piping is located over drain pan;
L’Acquis Number: 12056
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Matt the Miller's Tavern
Carmel, Indiana
Project No. 12056 MECHANICAL INSULATION 20 02 50 � 9
on heating control valve, located within heated space; on condensate piping between
steam trap and union; and on unions, flexible connections, and expansion joints.
B. Sub�Zero Piping (Below 0 degrees F):
1. Application Requirements: Insulate the following sub�zero HVAC piping
systems:
a. Low temperature ammonia refrigerant piping
2. Insulate each piping system specified above with one of the following types and
thicknesses of insulation:
a. Polyisocyanurate:
(1) 1�1/2" thick for pipe sizes up to and including 2"
(2) 2" thick for pipe sizes over 2".
b. Fiberglass:
(1) 1�1/2" thick for pipe sizes up to and including 2"
(2) 2" thick for pipe sizes over 2".
c. Cellular Glass:
(1) 1" thick for pipe sizes up to and including 2"
(2) 1�1/2" thick for pipe sizes over 2".
C. Cold Piping except chilled water piping (40 degrees F to ambient):
1. Application Requirements: Insulate the following cold HVAC piping systems:
a. HVAC make�up water piping
b. Air conditioning unit condensate drain piping
c. Refrigeration suction lines between evaporators and compressors
d. Discharge lines from cooling coil condensate pumps
2. Insulate each piping system specified above with one of the following types and
thicknesses of insulation:
a. Fiberglass:
(1) 1" thick for pipe sizes up to and including 2"
(2) 1�1/2" thick for pipe sizes 2�1/2" to 6"
(3) Use 2" thick for pipe 8" and larger.
b. Flexible Unicellular:
(1) On refrigerant suction lines only, use 1/2" thick for pipes sizes
up to and including 6".
D. Chilled Water Piping (40 degrees F to ambient):
1. Application Requirements: Insulate the following HVAC piping systems:
a. HVAC chilled water supply and return piping
2. Insulate each piping system specified above with one of the following types and
thicknesses of insulation:
a. Polyisocyanurate:
(1) 1" thick for all pipe sizes.
3. All steel chilled water piping shall be painted with one coat of rust resistant paint
equal to Rustoleum before covering is applied.
L’Acquis Number: 12056
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Matt the Miller's Tavern
Carmel, Indiana
Project No. 12056 MECHANICAL INSULATION 20 02 50 � 10
E. Dual Temperature Piping (40 degrees to 200 degrees F):
1. Application Requirements: Insulate the following dual temperature HVAC
piping systems.
a. HVAC hot/chilled water supply and return piping (as used in two pipe
heating – cooling systems)
2. Insulate each piping system specified above as specified for heating systems
herein.
3. All steel chilled water piping shall be painted with one coat of rust resistant paint
equal to Rustoleum before covering is applied.
F. Heating System Insulation Thicknesses
1. Application Requirements: Insulate the following hot HVAC piping systems.
a. HVAC hot water supply and return piping
b. Heated fuel piping
c. Hot gas refrigerant piping
2. Insulate each piping system specified above with fiberglass insulation of
thickness shown in the following table.
G. Steam System Insulation Thicknesses
1. Application Requirements: Insulate the following hot HVAC piping systems.
a. Steam and Steam Condensate piping systems
b. Discharge line from steam condensate pumps
2. Insulate each piping system specified above with fiberglass insulation of
thickness shown in the following table.
FLUID
OPERATING
TEMPERATURE
RANGE ˚F
HEATING SYSTEMS (STEAM AND STEAM CONDENSATE)
NOMINAL PIPE SIZE
< 1" 1" 1-1/4" 1-1/2" 2" 2-1/2" 3" 4" 5" to < 8" ≥ 8"
> 350 2.5 3.0 3.0 3.0 3.0 3.0 4.0 4.0 4.0 4.0
251-350 2.5 2.5 2.5 3.0 3.0 3.0 3.0 4.0 4.0 4.0
≤ 250 1.5 1.5 1.5 2.0 2.0 2.0 2.0 2.0 2.0 2.0
FLUID
OPERATING
TEMPERATURE
RANGE ˚F
HEATING SYSTEMS (HOT WATER, FUEL, REFRIGERANT)
NOMINAL PIPE SIZE
< 1" 1" 1-1/4" 1-1/2" 2" 2-1/2" 3" 4" 5" to < 8" ≥ 8"
141-200 1.0 1.0 1.5 1.5 1.5 2.0 2.0 2.0 2.0 2.0
105-140 1.0 1.0 1.5 1.5 1.5 2.0 2.0 2.0 2.0 2.0
L’Acquis Number: 12056
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Matt the Miller's Tavern
Carmel, Indiana
Project No. 12056 MECHANICAL INSULATION 20 02 50 � 11
3.04 DUCTWORK SYSTEM INSULATION:
A. Insulation Omitted: Do not insulate indoor fibrous glass ductwork, or indoor lined
ductwork except as otherwise noted below.
B. The specifications below apply when ductwork is round, oval or unlined rectangular. See
ductwork Specification Sections for ductwork to be lined.
C. Refer to the drawings for locations where Fire Rated Inorganic Duct Wrap is to be used
in lieu of specified insulation for the express purpose of providing a fire resistive
membrane around a duct.
D. Cold Ductwork:
1. Application Requirements: Insulate the following cold ductwork:
a. Outdoor air plenum and intake ductwork (including fans, dampers, etc.)
between the plenum and inlet of the air warming or cooling device.
b. Relief air plenum and relief air ductwork between the plenum and the
relief air motorized shut�off/back�draft damper in each duct connecting
to the relief plenum.
2. Insulate the ductwork system specified above with the following type and
thickness of insulation:
a. Rigid Fiberglass: 2" thick.
b. Semi�Rigid Fiberglass: 2" thick, for round and flat oval ductwork.
E. Hot Ductwork (Above Ambient Temperature):
1. Application Requirements: Insulate the following hot ductwork:
a. Range and hood exhaust ductwork. (This duct must always be wrapped
externally. It cannot be lined.)
b. Flue vent piping at outlet of infrared radiant tube heaters from unit
discharge to penetration of roof deck.
2. Insulate each ductwork system specified above with the following type and
thickness of insulation:
a. Rigid Fiberglass: 2" thick
F. HVAC Ductwork (Supply and Return):
1. Application Requirements: Insulate the following conditioned air ductwork:
a. Supply and return ductwork between fan discharge or HVAC unit
discharge and room terminal outlets. This work includes unlined plenum
boxes at all slot diffusers.
b. Omit insulation on return air ductwork located in return air ceiling
plenums or where exposed in a conditioned area.
2. Insulate each ductwork system specified above with the following type and
thickness of insulation:
L’Acquis Number: 12056
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Matt the Miller's Tavern
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Project No. 12056 MECHANICAL INSULATION 20 02 50 � 12
a. Rigid Fiberglass: 2" thick in Equipment Rooms and where ductwork is
exposed.
b. Flexible Fiberglass: 2" thick, application limited to concealed locations
c. Semi�Rigid Fiberglass: 2" thick, for round and flat oval ductwork in
Equipment Rooms and where ductwork is exposed.
3.05 EQUIPMENT INSULATION:
A. Cold Equipment (Below Ambient Temperature):
1. Application requirements: Insulate the following cold equipment:
a. Cold water storage tanks (If not factory insulated)
b. Water softeners (If not factory insulated)
c. Pneumatic water tanks (If not factory insulated)
d. Roof drain bodies
e. Chilled water pump bodies
f. Air separators
g. Cooling coils (in uninsulated casings)
2. Insulate each item of equipment specified above with one of the following types
and thicknesses of insulation:
a. Semi�Rigid Fiberglass: 1" thick, ASJ jacket and glass cloth.
b. Flexible Unicellular:
(1) For roof drain bodies only, use 1/2" thick.
(2) For chilled water pump bodies, use 2 layers of 3/4" thickness.
(3) For cooling coils, use 2 layers of 3/4" thickness.
B. Hot Equipment (Above Ambient Temperature):
1. Application Requirements: Insulate the following hot equipment:
a. Hot water storage tanks (If not factory insulated)
b. Water heaters (If not factory insulated)
c. Air separators
d. Heat exchangers
e. Hot water heating coils (in uninsulated casings)
f. Steam heating coils (in uninsulated casings; fiberglass insulation only)
g. Fuel oil heaters
h. Flash tanks (fiberglass insulation only)
i. Deaerator tank (If not factory insulated; fiberglass insulation only)
j. Feedwater tank (If not factory insulated; fiberglass insulation only)
2. Insulate each hot item of equipment specified above with one of the following
types and thicknesses of insulation:
a. Rigid Fiberglass Board: 2" thick, cover with 8.0 ounce glass cloth.
b. Semi�Rigid Fiberglass2" thick, for round vessels, except 2�1/2" thick for
steam jacketed heat exchangers. Cover with 8.0 ounce glass cloth.
c. For heating coils (including duct mounted reheat coils, and reheat coils
at VAV boxes), use 2 layers of 3/4" thickness sheet type flexible
unicellular.
L’Acquis Number: 12056
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Matt the Miller's Tavern
Carmel, Indiana
Project No. 12056 MECHANICAL INSULATION 20 02 50 � 13
C. Breechings and Stacks:
1. Application Requirements: Insulate the following breechings and stacks:
a. Breechings between heating equipment outlet and stack or chimney
connection, except for factory insulated breechings. (Double�wall type
'B' or type "PS" manufactured vent pipe shall be insulated as part of this
Section.)
b. Stacks from bottom to top except for factory insulated stacks.
2. Insulate each breeching and stack specified above with the following type and
thicknesses of insulation:
a. Calcium Silicate: 2" thick with 8.0 ounce glass cloth jacket
b. Mineral Wool: 2" thick, 6 lb./ft.3 with FSK jacket
3.06 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.
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.
1. Carefully point all segmental forms of insulation with insulating cement at all
joints and additionally cover with two separate 1/4" layers of insulating cement.
2. First layer shall be thoroughly dry before second layer is applied.
3. Trowel surface of final layer to smooth finish and apply glass cloth cover with
quick setting cement.
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,
L’Acquis Number: 12056
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Matt the Miller's Tavern
Carmel, Indiana
Project No. 12056 MECHANICAL INSULATION 20 02 50 � 14
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. Butt pipe insulation against pipe hanger insulation inserts. For hot pipes, apply 3" wide
vapor barrier tape or band over the butt joints. For cold piping apply wet coat of vapor
barrier lap cement on butt joints and seal joints with 3" wide vapor barrier tape or band.
K. Insulation Shields and Protection Saddles: Provide insulation shields and 20# density
fiberglass blocking at each hanger site in accordance with detail on drawings, providing
shield gauges and blocking thicknesses shown. Cut and shape insulation to fit around
protection saddles on steam and hot water piping. Saddles to be furnished and installed
by piping trade.
L. Pipe insulation is not required between control valve and the coil on heating run�outs
when the control valve is within 4 feet of the coil and the pipe size is 1” or less.
M. Do not insulate unions. Terminate insulation on both sides of unions with 45˚
circumferential taper and finish with insulating cement.
N. 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.
O. 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.
P. Install 1/2” flexible unicellular insulation on chilled water piping inside terminal unit
cabinets.
3.07 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.
L’Acquis Number: 12056
____________________________________________________________________________________________
Matt the Miller's Tavern
Carmel, Indiana
Project No. 12056 MECHANICAL INSULATION 20 02 50 � 15
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.
G. Fire Rated Inorganic Duct Wrap: shall be installed in strict compliance with the
manufacturer’s installation instructions to meet the UL classification indicated. Wrap
shall be installed in single or multiple layers to provide hourly rating noted on the
drawings.
3.08 INSTALLATION OF EQUIPMENT INSULATION:
A. General: Install equipment thermal insulation products in accordance with manufacturer's
written instructions, and in compliance with recognized industry practices to ensure that
insulation serves intended purpose.
B. Install insulation materials with smooth and even surfaces and on clean and dry surfaces.
Redo poorly fitted joints. Do not use mastic or joint sealer as filler for gapping joints and
excessive voids resulting from poor workmanship.
C. Maintain integrity of vapor�barrier on equipment insulation and protect it to prevent
puncture and other damage.
D. Do not apply insulation to equipment, breechings, or stacks while hot.
E. Apply insulation using staggered joint method for both single and double layer
construction, where feasible. Apply each layer of insulation separately.
F. When applying calcium silicate, coat insulated surface with layer of insulating cement,
troweled in workmanlike manner, leaving smooth continuous surface. Fill in scored
block, seams, chipped edges and depressions, and cover over wire netting and joints with
cement of sufficient thickness to remove surface irregularities.
G. Do not insulate boiler manholes, handholes, cleanouts, ASME stamp, and manufacturer's
nameplate. All insulation at hand�holes, access doors or other openings 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.
H. Provide removable insulation sections to cover part of equipment which must be opened
periodically for maintenance; include metal vessel covers, fasteners, flanges, frames and
accessories.
L’Acquis Number: 12056
____________________________________________________________________________________________
Matt the Miller's Tavern
Carmel, Indiana
Project No. 12056 MECHANICAL INSULATION 20 02 50 � 16
3.09 EXTERIOR DUCTWORK, PIPING AND EQUIPMENT
A. Ductwork Exposed to Weather: Supply, return and exhaust duct installed on a roof or
exterior of the building is to be externally insulated, and wrapped with a protective
jacket, whether internally lined or not. Where ductwork is specified to be externally
wrapped, provide double layer of insulation.
B. Piping exposed to Weather: Piping shall be insulated as specified for interior piping.
C. Equipment Exposed to Weather: Equipment shall be insulated as specified for interior
equipment.
D. All duct, piping and equipment insulation shall be covered with five�ply foil/film
covering as herein specified. Covering adhesive and joint tape shall be installed as
recommended by the covering manufacturer.
E. Encase exterior duct, piping and equipment insulation with .016" thick aluminum jacket
with weather�proof construction, caulked water tight with all overlapping seams down.
3.10 EXISTING INSULATION REPAIR:
A. Repair damaged sections of existing mechanical insulation, both previously damaged or
damaged during this construction period. Use insulation of same thickness as existing
insulation, install new jacket lapping and sealed over existing.
3.11 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