8._23_07_00_4802_Addendum.pdf

Section 23 07 00 Page 1

SECTION 23 07 00

THERMAL INSULATION FOR MECHANICAL SYSTEMS

02/13

PART 2 PRODUCTS

2.3.8 Jackets

2.2.8.4 Vapor Barrier/Vapor Retarder

Apply the following criteria to determine which system is required.

a. On ducts, piping and equipment located outside shall be equipped with a vapor barrier.

2.5 DUCT INSULATION SYSTEMS

2.5.1 Factory Applied Insulation

Provide factory-applied ASTM C552, cellular glass thermal or ASTM C534/C534M

Grade 1, Type II, flexible elastomeric closed cell insulation according to manufacturer's recommendations for insulation with insulation manufacturer's standard reinforced fire-retardant vapor barrier.

2.5.1.1 Rigid Insulation

Calculate the minimum thickness in accordance with ASHRAE 90.1 - IP.

2.5.1.2 Blanket Insulation

Calculate minimum thickness in accordance with ASHRAE 90.1 - IP.

2.5.3 Acoustical Duct Lining

2.5.3.1 Duct Liner

Flexible Elastomeric Acoustical and Conformable Duct Liner Materials:

Flexible Elastomeric Thermal, Acoustical and Conformable Insulation

Compliance with ASTM C534/C534M Grade 1, Type II; and NFPA 90A or NFPA 90B as applicable.

2.5.4 Duct Insulation Jackets

2.5.4.1 All-Purpose Jacket

Provide insulation with insulation manufacturer's standard reinforced fire-retardant jacket with or without integral vapor barrier as required by the service. In exposed locations, provide jacket with a white surface suitable for field painting.

2.5.4.2 Metal Jackets

Section 23 07 00 Page 2

2.5.4.2.1 Aluminum Jackets

ASTM B209, Temper H14, minimum thickness of 27 gauge ( 0.016 inch), with factory-applied polyethylene and kraft paper moisture barrier on inside surface. Provide smooth surface jackets for jacket outside dimension 8 inches and larger. Provide corrugated surface jackets for jacket outside dimension 8 inches and larger. Provide stainless steel bands, minimum width of 1/2 inch.

2.5.4.2.2 Stainless Steel Jackets

ASTM A167 or ASTM A240/A240M; Type 304, minimum thickness of 33 gauge (

0.010 inch), smooth surface with factory-applied polyethylene and kraft paper moisture barrier on inside surface. Provide stainless steel bands, minimum width of 1/2 inch.

2.5.4.3 Vapor Barrier/Weatherproofing Jacket

Vapor barrier/weatherproofing jacket shall be laminated self-adhesive

(minimum 2 mils adhesive, 3 mils embossed) less than 0.0000 permeability, (greater than 3 ply, standard grade, silver, white, black and embossed or greater than 8 ply (minimum 2.9 mils adhesive), heavy duty white or natural).

2.5.5 Weatherproof Duct Insulation

Provide ASTM C552, cellular glass thermal insulation or ASTM C534/C534M

Grade 1, Type II, flexible elastomeric cellular insulation, and weatherproofing as specified in manufacturer's instruction. Multi-ply, Polymeric Blend Laminate Jacketing: Construction of laminate designed to provide UV resistance, high puncture, tear resistance and an excellent WVT rate.

PART 3 EXECUTION

3.2.1.6 Pipe Insulation Material and Thickness

Pipe insulation materials must be as listed in Table 1 and must meet or exceed the requirements of ASHRAE 90.1 - IP.

TABLE 1

Insulation Material for Piping

Service

Material Specification Type Class VR/VB

Req'd

Chilled Water (Supply & Return, Dual Temperature Piping, 40 F nominal)

Cellular Glass ASTM C552 II 2 Yes

Flexible Elastomeric

Cellular

ASTM C534/C534M I Yes

Section 23 07 00 Page 3

Service

Material Specification Type Class VR/VB

Req'd

Mineral Fiber with Wicking

Material. Do not use in applications exposed to outdoor ambient conditions in climatic zones 1 through 4.

ASTM C547 I Yes

Heating Hot Water Supply & Return, Heated Oil (Max 250 F)

Mineral Fiber ASTM C547 I 1 No

Calcium Silicate ASTM C533 I No

Cellular Glass ASTM C552 II 2 No

Faced Phenolic Foam ASTM C1126 III Yes

Perlite ASTM C610 No

Flexible Elastomeric

Cellular

ASTM C534/C534M I 2 No

Cold Domestic Water Piping, Makeup Water & Drinking Fountain Drain Piping

Cellular Glass ASTM C552 II 2 No

Flexible Elastomeric

Cellular

ASTM C534/C534M I No

Hot Domestic Water Supply & Recirculating Piping (Max 200 F)

Mineral Fiber ASTM C547 I 1 No

Cellular Glass ASTM C552 II 2 No

Flexible Elastomeric

Cellular

ASTM C534/C534M I No

Faced Phenolic Foam ASTM C1126 III Yes

Refrigerant Suction Piping (35 degrees F nominal)

Flexible Elastomeric

Cellular

ASTM C534/C534M I No

Cellular Glass ASTM C552 II 1 Yes

Compressed Air Discharge, Steam and Condensate Return (201 to 250 Degrees F

Cellular Glass ASTM C552 II No

Mineral Fiber ASTM C547 I 1 No

Calcium Silicate ASTM C533 I No

Section 23 07 00 Page 4

Service

Material Specification Type Class VR/VB

Req'd

Faced Phenolic Foam ASTM C1126 III Yes

Perlite ASTM C610 No

Flexible Elastomeric

Cellular

ASTM C534/C534M I 2 No

Exposed Lavatory Drains, Exposed Domestic Water Piping & Drains to Areas for

Handicapped Personnel

Flexible Elastomeric

Cellular

ASTM C534/C534M I No

Horizontal Roof Drain Leaders (Including Underside of Roof Drain Fittings)

Flexible Elastomeric

Cellular

ASTM C534/C534M I No

Faced Phenolic Foam ASTM C1126 III Yes

Cellular Glass ASTM C552 III Yes

Condensate Drain Located Inside Building

Cellular Glass ASTM C552 II 2 No

Flexible Elastomeric

Cellular

ASTM C534/C534M I No

Medium Temperature Hot Water, Steam and Condensate (251 to 350 Degrees F)

Mineral Fiber ASTM C547 I 1 No

Calcium Silicate ASTM C533 I No

Cellular Glass ASTM C552 I or II No

Perlite ASTM C610 No

Flexible Elastomeric

Cellular

ASTM C534/C534M I 2 No

High Temperature Hot Water & Steam (351 to 700 Degrees F)

Mineral Fiber ASTM C547 I 2 No

Calcium Silicate ASTM C533 I No

Perlite ASTM C610 No

Cellular Glass ASTM C552 No

Brine Systems Cryogenics (-30 to 0 Degrees F)

Cellular Glass ASTM C552 II 2 No

Section 23 07 00 Page 5

Service

Material Specification Type Class VR/VB

Req'd

Flexible Elastomeric

Cellular

ASTM C534/C534M I No

Brine Systems Cryogenics (0 to 34 Degrees F)

Cellular Glass ASTM C552 II 2 No

Flexible Elastomeric

Cellular

ASTM C534/C534M I No

Note: VR/VB = Vapor Retarder/Vapor Barrier

TABLE 2

Piping Insulation Thickness (inch)

Do not use integral wicking material in Chilled water applications exposed to outdoor ambient conditions in climatic zones 1 through 4.

Service

Material Tube And Pipe Size (inch)

<1 1-<1.5 1.5-<4 4-<8 > or = >8

[Chilled Water (Supply & Return, Dual Temperature Piping, 40 Degrees F nominal)]

Cellular Glass 1.5 2 2 2.5 3

Mineral Fiber with Wicking

Material

1 1.5 1.5 2 2

Flexible Elastomeric Cellular 1 1 1 N/A N/A

[Chilled Water (Supply & Return, Dual Temperature Piping, 40 Degrees F nominal)]

Cellular Glass 1.5 1.5 1.5 1.5 2

Flexible Elastomeric Cellular 1 1 1 N/A N/A

Mineral Fiber with Wicking

Material

1 1.5 1.5 2 2

Section 23 07 00 Page 6

Heating Hot Water Supply & Return, Heated Oil (Max 250 F)

Mineral Fiber 1.5 1.5 2 2 2

Calcium Silicate 2.5 2.5 3 3 3

Cellular Glass 2 2.5 3 3 3

Perlite 2.5 2.5 3 3 3

Flexible Elastomeric Cellular 1 1 1 N/A N/A

Cold Domestic Water Piping, Makeup Water & Drinking Fountain Drain Piping

Cellular Glass 1.5 1.5 1.5 1.5 1.5

Flexible Elastomeric Cellular 1 1 1 N/A N/A

Hot Domestic Water Supply & Recirculating Piping (Max 200 F)

Mineral Fiber 1 1 1 1.5 1.5

Cellular Glass 1.5 1.5 1.5 2 2

Flexible Elastomeric Cellular 1 1 1 N/A N/A

Refrigerant Suction Piping (35 degrees F nominal)

Flexible Elastomeric Cellular 1 1 1 N/A N/A

Cellular Glass 1.5 1.5 1.5 1.5 1.5

Compressed Air Discharge, Steam and Condensate Return (201 to 250 Degrees F

Mineral Fiber 1.5 1.5 2 2 2

1.5* 2* 2.5* 3* 3.5*

Calcium Silicate 2.5 3 4 4 4.5

Cellular Glass 2 2.5 3 3 3

Perlite 2.5 3 4 4 4.5

Flexible Elastomeric Cellular 1 1 1 N/A N/A

Exposed Lavatory Drains, Exposed Domestic Water Piping & Drains to Areas for

Handicapped Personnel

Flexible Elastomeric Cellular 0.5 0.5 0.5 0.5 0.5

Horizontal Roof Drain Leaders (Including Underside of Roof Drain Fittings)

Section 23 07 00 Page 7

Cellular Glass 1.5 1.5 1.5 1.5 1.5

Flexible Elastomeric Cellular 1 1 1 N/A N/A

Faced Phenolic Foam 1 1 1 1 1

Condensate Drain Located Inside Building

Cellular Glass 1.5 1.5 1.5 1.5 1.5

Flexible Elastomeric Cellular 1 1 1 N/A N/A

Medium Temperature Hot Water, Steam and Condensate (251 to 350 Degrees F)

Mineral Fiber 1.5 3 3 4 4

2.5* * 3.5*

Calcium Silicate 2.5 3.5 4.5 4.5 5

Perlite 2.5 3.5 4.5 4.5 5

Flexible Elastomeric Cellular 1 1 1 N/A N/A

High Temperature Hot Water & Steam (351 to 700 Degrees F)

Mineral Fiber 2.5 3 3 4 4

Calcium Silicate 4 4.5 6 6 6

Perlite 4 4.5 6 6 6

Brine Systems Cryogenics (-30 to 0 Degrees F)

Cellular Glass 2.5 2.5 3 3 3.5

Flexible Elastomeric Cellular 1 1 N/A N/A N/A

Brine Systems Cryogenics (0 to 34 Degrees F)

Cellular Glass 2 2 2 2.5 3

Flexible Elastomeric Cellular 1 1 1 N/A N/A

3.3 DUCT INSULATION SYSTEMS INSTALLATION

Except for oven hood exhaust duct insulation, corner angles shall be installed on external corners of insulation on ductwork in exposed finished spaces before covering with jacket. Air conditioned spaces shall be defined as those spaces directly supplied with cooled conditioned air (or provided

Section 23 07 00 Page 8 with a cooling device such as a fan-coil unit) and heated conditioned air

(or provided with a heating device such as a unit heater, radiator or convector).

3.3.1 Duct Insulation Minimum Thickness

Duct insulation minimum thickness in accordance with Table 4.

Table 4 - Minimum Duct Insulation (inches)

Cold Air Ducts 2.0

Relief Ducts 1.5

Fresh Air Intake Ducts 1.5

Warm Air Ducts 2.0

Relief Ducts 1.5

Fresh Air Intake Ducts 1.5

3.3.2 Insulation and Vapor Retarder/Vapor Barrier for Cold Air Duct

Insulation and vapor retarder/vapor barrier shall be provided for the following cold air ducts and associated equipment.

a. Supply ducts.

b. Return air ducts.

c. Relief ducts.

d. Flexible run-outs (field-insulated).

e. Plenums.

f. Duct-mounted coil casings.

g. Coil headers and return bends.

h. Coil casings.

i. Fresh air intake ducts.

j. Filter boxes.

k. Mixing boxes (field-insulated).

l. Supply fans (field-insulated).

m. Site-erected air conditioner casings.

n. Ducts exposed to weather.

Section 23 07 00 Page 9

o. Combustion air intake ducts.

Insulation for rectangular ducts shall be flexible type where concealed, minimum density 3/4 pcf, and rigid type where exposed, minimum density 3 pcf. Insulation for both concealed or exposed round/oval ducts shall be flexible type, minimum density 3/4 pcf or a semi rigid board, minimum density 3 pcf, formed or fabricated to a tight fit, edges beveled and joints tightly butted and staggered. Insulation for all exposed ducts shall be provided with either a white, paint-able, factory-applied Type I jacket or a field applied vapor retarder/vapor barrier jacket coating finish as specified, the total field applied dry film thickness shall be approximately

1/16 inch. Insulation on all concealed duct shall be provided with a factory-applied Type I or II vapor retarder/vapor barrier jacket. Duct insulation shall be continuous through sleeves and prepared openings except firewall penetrations. Duct insulation terminating at fire dampers, shall be continuous over the damper collar and retaining angle of fire dampers, which are exposed to unconditioned air and which may be prone to condensate formation. Duct insulation and vapor retarder/vapor barrier shall cover the collar, neck, and any un-insulated surfaces of diffusers, registers and grills. Vapor retarder/vapor barrier materials shall be applied to form a complete unbroken vapor seal over the insulation.

3.3.2.1 Installation on Concealed Duct

a. For rectangular, oval or round ducts, flexible insulation shall be attached by applying adhesive around the entire perimeter of the duct in 6 inch wide strips on 12 inch centers.

b. For rectangular and oval ducts, 24 inches and larger insulation shall be additionally secured to bottom of ducts by the use of mechanical fasteners. Fasteners shall be spaced on 16 inch centers and not more than 16 inches from duct corners.

c. For rectangular, oval and round ducts, mechanical fasteners shall be provided on sides of duct risers for all duct sizes. Fasteners shall be spaced on 16 inch centers and not more than 16 inches from duct corners.

d. Insulation shall be impaled on the mechanical fasteners (self stick pins) where used and shall be pressed thoroughly into the adhesive.

Care shall be taken to ensure vapor retarder/vapor barrier jacket joints overlap 2 inches. The insulation shall not be compressed to a thickness less than that specified. Insulation shall be carried over standing seams and trapeze-type duct hangers.

e. Where mechanical fasteners are used, self-locking washers shall be installed and the pin trimmed and bent over.

f. Jacket overlaps shall be secured with staples and tape as necessary to ensure a secure seal. Staples, tape and seams shall be coated with a brush coat of vapor retarder coating or PVDC adhesive tape or greater than 3 ply laminate (minimum 2 mils adhesive, 3 mils embossed) - less than 0.0000 perm adhesive tape.

g. Breaks in the jacket material shall be covered with patches of the same material as the vapor retarder jacket. The patches shall extend not less than 2 inches beyond the break or penetration in all directions

Section 23 07 00 Page 10 and shall be secured with tape and staples. Staples and tape joints shall be sealed with a brush coat of vapor retarder coating or PVDC adhesive tape or greater than 3 ply laminate (minimum 2 mils adhesive, 3 mils embossed) - less than 0.0000 perm adhesive tape.

h. At jacket penetrations such as hangers, thermometers, and damper operating rods, voids in the insulation shall be filled and the penetration sealed with a brush coat of vapor retarder coating or PVDC adhesive tape greater than 3 ply laminate (minimum 2 mils adhesive, 3 mils embossed) - less than 0.0000 perm adhesive tape.

i. Insulation terminations and pin punctures shall be sealed and flashed with a reinforced vapor retarder coating finish or tape with a brush coat of vapor retarder coating.. The coating shall overlap the adjoining insulation and un-insulated surface 2 inches. Pin puncture coatings shall extend 2 inches from the puncture in all directions.

j. Where insulation standoff brackets occur, insulation shall be extended under the bracket and the jacket terminated at the bracket.

3.3.2.2 Installation on Exposed Duct Work

a. For rectangular ducts, rigid insulation shall be secured to the duct by mechanical fasteners on all four sides of the duct, spaced not more than 12 inches apart and not more than 3 inches from the edges of the insulation joints. A minimum of two rows of fasteners shall be provided for each side of duct 12 inches and larger. One row shall be provided for each side of duct less than 12 inches. Mechanical fasteners shall be as corrosion resistant as G60 coated galvanized steel, and shall indefinitely sustain a 50 lb tensile dead load test perpendicular to the duct wall.

b. Form duct insulation with minimum jacket seams. Fasten each piece of rigid insulation to the duct using mechanical fasteners. When the height of projections is less than the insulation thickness, insulation shall be brought up to standing seams, reinforcing, and other vertical projections and shall not be carried over. Vapor retarder/barrier jacket shall be continuous across seams, reinforcing, and projections.

When height of projections is greater than the insulation thickness, insulation and jacket shall be carried over. Apply insulation with joints tightly butted. Neatly bevel insulation around name plates and access plates and doors.

c. Impale insulation on the fasteners; self-locking washers shall be installed and the pin trimmed and bent over.

d. Seal joints in the insulation jacket with a 4 inch wide strip of tape.

Seal taped seams with a brush coat of vapor retarder coating.

e. Breaks and ribs or standing seam penetrations in the jacket material shall be covered with a patch of the same material as the jacket.

Patches shall extend not less than 2 inches beyond the break or penetration and shall be secured with tape and stapled. Staples and joints shall be sealed with a brush coat of vapor retarder coating.

Section 23 07 00 Page 11

f. At jacket penetrations such as hangers, thermometers, and damper operating rods, the voids in the insulation shall be filled and the penetrations sealed with a flashing sealant.

g. Insulation terminations and pin punctures shall be sealed and flashed with a reinforced vapor retarder coating finish. The coating shall overlap the adjoining insulation and un-insulated surface 2 inches.

Pin puncture coatings shall extend 2 inches from the puncture in all directions.

h. Oval and round ducts, flexible type, shall be insulated with factory

Type I jacket insulation with minimum density of 3/4 pcf, attached as in accordance with MICA standards.

3.3.3 Insulation for Warm Air Duct

Insulation and vapor barrier shall be provided for the following warm air ducts and associated equipment:.

a. Supply ducts.

b. Return air ducts.

c. Relief air ducts

d. Flexible run-outs (field insulated).

e. Plenums.

f. Duct-mounted coil casings.

g. Coil-headers and return bends.

h. Coil casings.

i. Fresh air intake ducts.

j. Filter boxes.

k. Mixing boxes.

l. Supply fans.

m. Site-erected air conditioner casings.

n. Ducts exposed to weather.

Insulation for rectangular ducts shall be flexible type where concealed, and rigid type where exposed. Insulation on exposed ducts shall be provided with a white, paint-able, factory-applied Type II jacket, or finished with adhesive finish. Flexible type insulation shall be used for round ducts, with a factory-applied Type II jacket. Insulation on concealed duct shall be provided with a factory-applied Type II jacket. Adhesive finish where indicated to be used shall be accomplished by applying two coats of adhesive with a layer of glass cloth embedded between the coats. The total dry film thickness shall be approximately 1/16 inch. Duct insulation shall be

Section 23 07 00 Page 12 continuous through sleeves and prepared openings. Duct insulation shall terminate at fire dampers and flexible connections.

3.3.3.1 Installation on Concealed Duct

a. For rectangular, oval and round ducts, insulation shall be attached by applying adhesive around the entire perimeter of the duct in 6 inch wide strips on 12 inch centers.

b. For rectangular and oval ducts 24 inches and larger, insulation shall be secured to the bottom of ducts by the use of mechanical fasteners.

Fasteners shall be spaced on 18 inch centers and not more than 18 inches from duct corner.

c. For rectangular, oval and round ducts, mechanical fasteners shall be provided on sides of duct risers for all duct sizes. Fasteners shall be spaced on 18 inch centers and not more than 18 inches from duct corners.

d. The insulation shall be impaled on the mechanical fasteners where used.

The insulation shall not be compressed to a thickness less than that specified. Insulation shall be carried over standing seams and trapeze-type hangers.

e. Self-locking washers shall be installed where mechanical fasteners are used and the pin trimmed and bent over.

f. Insulation jacket shall overlap not less than 2 inches at joints and the lap shall be secured and stapled on 4 inch centers.

3.3.3.2 Installation on Exposed Duct

a. For rectangular ducts, the rigid insulation shall be secured to the duct by the use of mechanical fasteners on all four sides of the duct, spaced not more than 16 inches apart and not more than 6 inches from the edges of the insulation joints. A minimum of two rows of fasteners shall be provided for each side of duct 12 inches and larger and a minimum of one row for each side of duct less than 12 inches.

b. Duct insulation with factory-applied jacket shall be formed with minimum jacket seams, and each piece of rigid insulation shall be fastened to the duct using mechanical fasteners. When the height of projection is less than the insulation thickness, insulation shall be brought up to standing seams, reinforcing, and other vertical projections and shall not be carried over the projection. Jacket shall be continuous across seams, reinforcing, and projections. Where the height of projections is greater than the insulation thickness, insulation and jacket shall be carried over the projection.

c. Insulation shall be impaled on the fasteners; self-locking washers shall be installed and pin trimmed and bent over.

d. Joints on jacketed insulation shall be sealed with a 4 inch wide strip of tape and brushed with vapor retarder coating.

e. Breaks and penetrations in the jacket material shall be covered with a patch of the same material as the jacket. Patches shall extend not

Section 23 07 00 Page 13 less than 2 inches beyond the break or penetration and shall be secured with adhesive and stapled.

f. Insulation terminations and pin punctures shall be sealed with tape and brushed with vapor retarder coating.

g. Oval and round ducts, flexible type, shall be insulated with factory

Type I jacket insulation, minimum density of 3/4 pcf attached by staples spaced not more than 16 inches and not more than 6 inches from the degrees of joints. Joints shall be sealed in accordance with item

"d." above.

3.3.4 Ducts Handling Air for Dual Purpose

For air handling ducts for dual purpose below and above 60 degrees F, ducts shall be insulated as specified for cold air duct.

3.3.5 Insulation for Evaporative Cooling Duct

Evaporative cooling supply duct located in spaces not evaporatively cooled, shall be insulated. Material and installation requirements shall be as specified for duct insulation for warm air duct.

3.3.6 Duct Test Holes

After duct systems have been tested, adjusted, and balanced, breaks in the insulation and jacket shall be repaired in accordance with the applicable section of this specification for the type of duct insulation to be repaired.

3.3.7 Duct Exposed to Weather

3.3.7.1 Installation

Ducts exposed to weather shall be insulated and finished as specified for the applicable service for exposed duct inside the building. After the above is accomplished, the insulation shall then be further finished as detailed in the following subparagraphs.

3.3.7.2 Round Duct

Laminated self-adhesive (minimum 2 mils adhesive, 3 mils embossed) vapor barrier/weatherproofing jacket - Less than 0.0000 permeability, (greater than 3 ply, standard grade, silver, white, black and embossed or greater than 8 ply, heavy duty, white and natural) membrane shall be applied overlapping material by 3 inches no bands or caulking needed - see manufacturer's recommended installation instructions. Aluminum jacket with factory applied moisture retarder shall be applied with the joints lapped not less than 3 inches and secured with bands located at circumferential laps and at not more than 12 inch intervals throughout. Horizontal joints shall lap down to shed water and located at 4 or 8 o'clock position. Joints shall be sealed with metal jacketing sealant to prevent moisture penetration. Where jacketing abuts an un-insulated surface, joints shall be sealed with metal jacketing sealant.

3.3.7.3 Fittings

Section 23 07 00 Page 14

Fittings and other irregular shapes shall be finished as specified for rectangular ducts.

3.3.7.4 Rectangular Ducts

Two coats of weather barrier mastic reinforced with fabric or mesh for outdoor application shall be applied to the entire surface. Each coat of weatherproof mastic shall be 1/16 inch minimum thickness. The exterior shall be a metal jacketing applied for mechanical abuse and weather protection, and secured with screws or vapor barrier/weatherproofing jacket less than 0.0000 permeability greater than 3 ply, standard grade, silver, white, black, and embossed or greater than 8 ply, heavy duty white and natural. Membrane shall be applied overlapping material by 3 inches. No bands or caulking needed-see manufacturing recommend installation instructions.

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