PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section. B. Related Sections: 1. Section 07840 Through Penetration Firestop Systems 2. Section 09900 Paints and Coatings 3. Section 15060 Hangers and Supports 4. Section 15075 Mechanical Identification 5. Section 15051 Motors and Variable Frequency Drives 6. Section 15160 Storm Drainage Piping 7. Section 15181 Hydronic Piping 8. Section 15840 Air Terminal Units 9. Section 15815 Metal Ducts 1.2 SUMMARY A. Section includes ductwork insulation, duct liner, insulation jackets, thermal insulation for piping systems including vapor retarders, jackets and accessories. 1.3 REFERENCES A. ASTM B209 - Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate (ASTM B209M - Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate [Metric]). B. ASTM C177 - Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded Hot Plate Apparatus. C. ASTM C195 - Standard Specification for Mineral Fiber Thermal Insulating Cement. D. ASTM C449/C449M - Standard Specification for Mineral Fiber Hydraulic-Setting Thermal Insulating and Finishing Cement. E. ASTM C518 - Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus. F. ASTM C533 - Standard Specification for Calcium Silicate Block and Pipe Thermal Insulation. G. ASTM C534 - Standard Specification for Preformed Flexible Elastomeric Cellular Thermal Insulation in Sheet and Tubular Form. H. ASTM C547 - Standard Specification for Mineral Fiber Preformed Pipe Insulation. Page 1 of 12
I. ASTM C552 - Standard Specification for Cellular Glass Thermal Insulation. J. ASTM C553 - Standard Specification for Mineral Fiber Blanket Thermal Insulation for Commercial and Industrial Applications. K. ASTM C612 - Standard Specification for Mineral Fiber Block and Board Thermal Insulation. L. ASTM C1071 - Standard Specification for Thermal and Acoustical Insulation (Glass Fiber, Duct Lining Material). M. ASTM C1136 B Standard Specification for Flexible, Low Permeate Vapor Retardants for Thermal Insulation. N. ASTM D1784 - Standard Specification for Rigid Poly (Vinyl Chloride) (PVC) Compounds and Chlorinated Poly (Vinyl Chloride) (CPVC) Compounds. O. ASTM E84 - Standard Test Method for Surface Burning Characteristics of Building Materials. P. ASTM E96 - Standard Test Methods for Water Vapor Transmission of Materials. Q. ASTM E162 - Standard Test Method for Surface Flammability of Materials Using a Radiant Heat Energy Source. R. NAIMA (North American Insulation Manufacturers Association) - National Insulation Standards. S. SMACNA (Sheet Metal and Air Conditioning Contractors National Association) - HVAC Duct Construction Standards - Metal and Flexible. 1.4 DEFINITIONS A. Hot Surfaces: Normal operating temperatures of 100 deg F or higher. B. Dual-Temperature Surfaces: Normal operating temperatures that vary from hot to cold. C. Cold Surfaces: Normal operating temperatures less than 75 deg F. D. Thermal resistivity is designated by an r-value that represents the reciprocal of thermal conductivity (k-value). Thermal conductivity is the rate of heat flow through a homogenous material exactly 1 inch thick. Thermal resistivity (r-value) is expressed by the temperature difference in degrees Fahrenheit between the two exposed faces required to cause 1 BTU per hour (1 Watt) to flow through 1 square foot at mean temperatures indicated. Page 2 of 12
E. Thermal Conductivity (k-value): Measure of heat flow through a material at a given temperature difference; conductivity is expressed in units of Btu x inch/h x sq. ft. x deg F. F. Density: Is expressed in pcf. 1.5 SUBMITTALS A. See Section 15050 Basic Mechanical Materials and Methods, submittal requirements. B. No insulation shall be obtained or delivered to the job site until receipt of approved shop drawings from the Owner. C. General: Submit the following in accordance with Conditions of Contract and Division 1 Specification Sections. 1. A complete tabular insulation schedule of all the insulation being provided under this project. 2. Schedule headings shall include type of equipment (including Tag No.), Pipe (service, type), Ductwork (service, type), Insulation Type, Insulation Manufacturer, Insulation Thickness, Insulation K-value, Jacketing or Protective Covering. 3. Manufacturer's highlighted material data sheets, these should include published composite flame spread, smoke developed hazard ratings for insulation and jacketing and K-factors for insulation. 4. Provide published manufacturer's insulation application recommendations. Highlight application procedures being used on this Contract and note any deviations planned. 5. Provide when requested by the Owner samples of the insulation being proposed. 1.6 QUALITY CONTROL A. Fire Performance Characteristics: Conform to the following characteristics for insulation including facings, cements, and adhesives, when tested according to ASTM E 84, by UL or other testing or inspecting organization acceptable to the authority having jurisdiction. Label insulation with appropriate markings of testing laboratory. 1. Interior Insulation: Flame spread rating of 25 or less and a smoke developed rating of 50 or less. 2. Exterior Insulation: Flame spread rating of 75 or less and a smoke developed rating of 150 or less. B. All of the insulation products or their shipping cartons shall bear a label indicating that flame and smoke ratings do not exceed above requirements. C. Field-Constructed Mock-Up: Before installation, erect mock-up of size and at locations indicated to demonstrate workmanship quality. Include method of attachment and finishing for each. 1. Interior and exterior equipment. 2. Interior and exterior duct systems. 3. Interior and exterior piping systems. Page 3 of 12
4. Retain and protect mock-ups during construction as a standard for judging completed unit of Work. 5. Remove mock-ups from Project site when directed. 6. Accepted mock-ups may become part of completed unit of Work. 1.7 SEQUENCING AND SCHEDULING A. Insulation shall not be installed or applied until the equipment and associated piping and ductwork has been pressure tested and the building is weatherproof. B. Schedule insulation application after installation and testing of heat trace tape. 1.8 QUALIFICATIONS A. Manufacturer: Company specializing in manufacturing products specified in this section with minimum three years experience. B. Contractor: Company and company field staff specializing in performing Work of this section with minimum five years commercial experience. 1.9 PRE-INSTALLATION MEETING A. Convene minimum one week prior to commencing work of this section. 1.10 DELIVERY, STORAGE, AND HANDLING A. Accept materials on site in original factory packaging, labeled with manufacturer's identification, including product density and thickness. B. Protect insulation from weather and construction traffic, dirt, water, chemical, and mechanical damage, by storing in original wrapping. C. Contractor to replace any insulating materials damaged due to water, dirt, chemicals, etc. at no charge to Owner. 1.11 ENVIRONMENTAL REQUIREMENTS A. Do not install insulation outside ambient conditions required by manufacturer of each product. 1.12 FIELD MEASUREMENTS A. Verify field measurements prior to fabrication. 1.13 WARRANTY A. Provide one year manufacturer warranty for man made fiber. Page 4 of 12
PART 2 - PRODUCTS 2.1 MAN MADE MINERAL FIBER Insulation for piping A. Manufacturers: 1. Owens - Corning 2. Manville 3. Certain Teed 4. Knauf B. Provide materials in accordance with Municipality of Las Vegas standards. C. Insulation: Type A. ASTM C547 Mineral Fiber Pipe Insulation, Type I 850, K-factor of0.24 at 75 F, flame spread/smoke developed rating of 25/50 or less. D. Vapor Retarder Jacket: 1. ASTM C921, White Kraft paper with glass fiber yarn, bonded to aluminized film. 2. Moisture vapor transmission: ASTM E96; 0.02 perm-inches. E. Self Sealing Cap: As provided by manufacturer. 2.2 POLYISOCYANURATE FOAM Insulation for piping A. Manufacturer: 1. Hi Therm 2. Dow Corning B. Insulation: Type B. ASTM E-84, HT-300 rigid closed cell pipe insulation having K-factor of 0.165 (aged 180 days at 75 F) meeting flame spread/smoke developed rating of 25/50 or less. C. Vapor Retarder Jacket: 1. ASTM C921, white Kraft paper with glass fiber yarn, bonded to aluminum film, or as otherwise recommended by insulation manufacturer. 2. Meet flame spread/smoke developed rating of 25/50 or less, in accordance with ASTM E-84. D. Insulation: Thickness for foam having K-factor of 0.165 may be reduced from that indicated for mineral fiber insulation having a K-factor of 0.24, as long as the equivalent thermal resistance is maintained. 2.3 MINERAL FIBER, FLEXIBLE Insulation for the exterior of sheet metal ducts A. Manufacturers: 1. Owens - Corning 2. Manville 3. Certain Teed 4. Knauf Page 5 of 12
B. Insulation: Type A. ASTM C553 Mineral Fiber Blanket Thermal Insulation for Commercial and Industrial Applications, Type II. C. Vapor Retardant Jacket: 1. Kraft paper with glass fiber yarn and bonded to aluminized film 0.0032 inch vinyl. 2. Moisture vapor transmission: ASTM E96; 0.02,.3 perm. 3. Secure with pressure sensitive tape and tie wire: 0.048 inch stainless steel with twisted ends on maximum 12 inch centers. D. Vapor Retardant Tape 1. Kraft paper reinforced with glass fiber yarn and bonded to aluminized film, with pressure sensitive rubber based adhesive. 2.4 MINERAL FIBER, RIGID Insulation for the exterior of sheet metal ducts. A. Manufacturers: 1. Owens - Corning 2. Manville 3. Certain Teed 4. Knauf B. Insulation: Type B. ASTM C612 Mineral Fiber Block and Board Insulation, Type IA C. Vapor Retardant Jacket: 1. Kraft paper with glass fiber yarn and bonded to aluminized film 2. Moisture vapor transmission: ASTM E96; 0.04 perm. 3. Secure with two coats of vapor barrier mastic and glass tape. D. Vapor Retardant Tape 1. Kraft paper reinforced with glass fiber yarn and bonded to aluminized film, with pressure sensitive rubber based adhesive. 2.5 INSULATION JACKET A. Pipe Jacket: ASTM D1784, One piece molded type fitting covers and sheet material, offwhite color. 1. Thickness: 20 mil. 2. Connections: Pressure sensitive color matching vinyl tape. B. Aluminum Jacket: ASTM B209 1. Thickness: 0.016 inch thick sheet. 2. Finish: Embossed. 3. Joining: Longitudinal slip joints and 2 inch laps. 4. Fittings: 0.016 inch thick die shaped fitting covers with factory attached protective liner. 5. Metal Jacket Bands: 3/8 inch wide; 0.015 inch thick aluminum. Page 6 of 12
2.6 GLASS FIBER DUCT LINER, FLEXIBLE Insulation for the Interior of sheet metal ducts. A. Manufacturers: 1. Owens - Corning 2. Manville 3. Certain Teed 4. Knauf B. Insulation: Type C ASTM C1071 Thermal and Acoustical Insulation (Glass Fiber, Duct Lining Material), Type I C. Adhesive: 1. Waterproof, ASTM E162 fire-retardant type. D. Liner Fasteners: Galvanized steel impact applied or welded with press-on head. 2.7 CALCIUM SILICATE A. Manufacturers: 1. Owens-Corning 2. Manville 3. Certain Tead 4. Knauf B. Insulation: Type 1 ASTM C533, inorganic, hydrous calcium silicate, non-asbestos fibrous reinforcement, incombustible. C. Form: Preformed pipe sections. D. Thermal Conductivity: 0.60 at 500 degrees F. E. Dry Density: 15.0 pcf maximum. F. Compressive Strength: 100 psi minimum at 5 percent deformation. 2.8 IMS 22, KITCHEN EXHAUST DUCT INSULATION A. The kitchen exhaust ductwork shall be insulated in a three layer process. The first two layers shall consist of two 2" thick blankets of ceramic fiber insulation impaled over weld pins. The third layer shall consist of a 1" thick layer of Fiberglas blanket insulation impaled over the same stick pins and installed in accordance with IMS 11. B. Material (First Two Layers): Two 2" thick layers of ceramic fiber blanket insulation with K-value of 0.31 at 400 deg. F, 6 PCF average density; Fiberfrax Durablanket or approved equal by Owner. PART 3 - EXECUTION Page 7 of 12
3.1 EXAMINATION A. Verify that piping, equipment and ductwork has been tested before applying insulation materials. B. Verify that surfaces are clean and dry, with foreign material removed. 3.2 INSTALLATION A. Install in accordance with NAIMA National Insulation Standards. B. Exposed Piping: Locate insulation and cover seams in least visible locations. C. Insulated pipes conveying fluids below ambient temperature: Insulate entire system including fittings, valves, unions, flanges, strainers, flexible connections, and expansion joints. D. Man made mineral fiber insulated pipes conveying fluids below ambient temperature: 1. Provide factory-applied or field-applied vapor retardant jackets. Secure factoryapplied jackets with pressure sensitive adhesive self-sealing longitudinal laps and butt strips. Secure field-applied jackets with outward clinch expanding staples and seal all staple penetrations with vapor retardant mastic. 2. Insulate fittings, joints, and valves with molded insulation of like material and thickness as adjacent pipe. Finish with glass cloth and vapor retardant adhesive or PVC fitting covers. 3. Furnish calcium silicate inserts at piping supports. E. For hot piping conveying fluids over 140 degrees F insulate flanges and unions at equipment. F. Man made mineral fiber insulated pipes conveying fluids above ambient temperature: 1. Provide factory-applied or field-applied standard jackets. Secure with outward clinch expanding staples or the pressure sensitive adhesive system on standard factory-applied jacket and butt strips or both. 2. Insulate fittings, joints, and valves with insulation of like material and thickness as adjoining pipe. Finish with glass cloth and adhesive or PVC fitting covers. G. Inserts and Shields: 1. Application: Piping or Equipment 1-1/2 inches diameter or larger. 2. Shields: Galvanized steel between pipe hangers or pipe hanger rolls and inserts. 3. Insert location: Between support shield and piping and under the finish jacket. 4. Insert configuration: Minimum 6 inches long, of same thickness and contour as adjoining insulation; may be factory fabricated. 5. Insert material: Compression resistant insulating material suitable for the planned temperature range and service. Page 8 of 12
H. Continue insulation through penetrations of building assemblies or portions of assemblies having a fire resistance rating of one hour or less. Provide intumescent firestopping when continuing insulation through assembly. Finish at supports, protrusions, and interruptions. Section 07840 for penetrations of assemblies with a fire resistance rating greater than one hour. I. Pipe Exposed in Finished Spaces: Finish with PVC jacket and fitting covers. J. Exterior Applications: Provide vapor retardant jacket. Insulate fittings, joints, and valves with insulation of like material and thickness as adjoining pipe, and finish with glass mesh reinforced vapor retardant cement. Cover with aluminum fitting covers and aluminum jacket with seams located at the 3 or 9 o clock position on the side of horizontal piping with the overlap facing down to shed water or on the bottom side of horizontal equipment. K. Buried Piping: Insulate only where the manufacturer of a specific insulation recommends that their product may be installed either in a trench, tunnel or direct buried. Provide factory fabricated assembly with inner all-purpose service jacket with self-sealing lap, and asphalt impregnated open mesh glass fabric, with 1 mil thick aluminum foil sandwiched between three layers of bituminous compound; outer surface faced with a polyester film. L. Heat Traced Piping: Insulate fittings, joints, and valves with insulation of like material, thickness, and finish as adjoining pipe. Provide a size large enough to enclose pipe and heat tracer. Cover with aluminum jacket with seams located at the 3 or 9 o clock position on the side of horizontal piping with the overlap facing down to shed water. M. Factory Insulated Equipment: Do not insulate. N. Finish insulation at supports, protrusions, and interruptions. O. Nameplates and ASME Stamps: Bevel and seal insulation around; do not insulate over. P. Insulated ductwork conveying air below ambient temperature: 1. Provide insulation with jackets. 2. Finish with tape and jacket. 3. Continue insulation through walls, sleeves, hangers, and other duct penetrations. 4. Insulate entire system including fittings, joints, flanges, fire dampers, flexible connections, and expansion joints. Q. Insulated ductwork conveying air above ambient temperature: 1. Provide insulation with jacket. 2. Insulate fittings and joints- where service access is required, bevel and seal ends of insulation. R. Ductwork Exposed in Finished Spaces- finish with canvas jacket sized for finish painting. S. Exterior Applications: Provide insulation with vapor retardant jacket. Cover with caulked aluminum jacket with seams located on bottom side of horizontal duct section. Page 9 of 12
T. External Duct Insulation Application: 1. Secure insulation with vapor retardant with wires and seal jacket joints with vapor retardant adhesive or tape to match jacket. 2. Secure insulation without vapor retardant with staples, tape, or wires. Secure jacketed insulation with wire ties at 12 inch on center and tape joints 3 inch on center at fittings. 3. Install without sag on underside of ductwork. Use adhesive or mechanical fasteners where necessary to prevent sagging. Lift ductwork off trapeze hangers and insert spacers. 4. Seal vapor retardant penetrations by mechanical fasteners with vapor retardant adhesive. 5. Stop and point insulation around access doors and damper operators to allow operation without disturbing wrapping. U. Duct Liner Application: 1. Adhere insulation with adhesive for 100 percent coverage. 2. Secure insulation with mechanical liner fasteners. SMACNA Standards for spacing. 3. Seal and smooth joints- seal and coat transverse joints. 4. Seal liner surface penetrations with adhesive. 5. Duct dimensions indicated are net inside dimensions required for airflow. Increase duct size to allow for insulation thickness. Page 10 of 12
3.3 SCHEDULES INSULATION PIPING TYPE PIPE SIZE THICKNESS Inch (mm) Inch (mm) Domestic Cold Water Supply Hot Water Supply and Hot Water A or B Up to 2 0.75 Recirculating 2½ and larger 1" Hot Water Piping Exposed B Up to 2 1½ To Freezing (Outdoors) 2½ and larger 2" Chilled Water Piping Exposed B Up to 2 1 To Freezing (Outdoors) 2½ and larger 1½" Heating Hot Water Supply and Return A or B Up to 2 1½ 2½ and larger 2" Chilled Water Supply and Return B Up to 2 1 2½ and larger 1½" Condensate Drains Exposed to B All 1 Outdoor Conditions Storm Drains (Horizontal Runs Only) A All 1 Notes: Fiberglass insulation shall not be used for chilled water supply and return piping. INSULATION DUCTWORK TYPE THICKNESS DENSITY (#/C.F.) Concealed Supply Ducts A 1-1/2" 3/4 Supply Ducts in Vertical Shaft A 1-1/2" 3/4 Concealed Return Ducts in Unconditioned Space A 1-1/2" 3/4 Outside Air Ducts A 1-1/2 3/4 Exposed Ducts In Fan Rooms or Unconditioned Spaces B 1-1/2 1-1/2 Ducts, Where Noted C 1-1/2" 1-1/2 Note: External insulation is not required where internal duct liner (Type C) has been furnished. END OF SECTION Page 11 of 12
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