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HomeMy WebLinkAbout15250.pdf BICKFORD OF CARMEL, IN 12/12/2012 MECHANICAL INSULATION 15250-1 SECTION 15250 MECHANICAL INSULATION 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 work of this section. 1.2 QUALITY ASSURANCE 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 E 84 (NFPA 255) method. B. Storage and Handling Store insulation in dry place and protect from water and or moisture damage in accordance with manufacturer’s recommendations. The contractor shall remove from the project any insulation which becomes subjected to water, moisture or otherwise becomes ”wet” prior to or post installation. “Wet” insulation shall be removed from the project and not be “dried” and reused. 1.3 SUBMITTALS A. Product Data Submit manufacturer's technical product data and installation instructions for each type of mechanical insulation. Submit schedule showing manufacturer's product number, k- value, thickness, and furnished accessories for each mechanical system requiring insulation. PART 2 - PRODUCTS 2.1 ACCEPTABLE MANUFACTURERS A. Subject to compliance with requirements, provide products of one of the following: Insulation: Armstrong CertainTeed Corp. Knauf Fiber Glass Manville Products Corp. Owens-Corning Fiberglass Corp. Pittsburgh Corning Corp. 2.2 PIPING INSULATION MATERIALS A. Fiberglass Piping Insulation: ASTM C 547, Class 1 unless otherwise indicated. B. Flexible Unicellular Piping Insulation: ASTM C 534, Type I. 2.3 DUCTWORK INSULATION MATERIALS A. Flexible Fiberglass Ductwork Insulation: ASTM C 533, Type I, Class B-4. B. Rigid Fiberglass Ductwork Insulation: ASTM C 612, Class 1. C. Flexible Fire Protection Wrap Insulation: (Fire Temp Wrap Duct Installation as ASTM E 119/UL 263 manufactured by Johns-Manville or equal) ASTM 814/UL 1479 BICKFORD OF CARMEL, IN 12/12/2012 MECHANICAL INSULATION 15250-2 ASTM E 84/UL 723 2.4 EQUIPMENT INSULATION MATERIALS A. Rigid Fiberglass Equipment Insulation: ASTM C 612, Class 2. B. Flexible Fiberglass Equipment Insulation: ASTM C 533, Type I, Class B-4. C. Flexible Unicellar Equipment Insulation: ASTM C 534, Type II. PART 3 - EXECUTION 3.1 PIPING SYSTEMS INSULATION A. FIBERGLASS INSULATION Fiberglass insulation factory-wrapped with a kraft reinforced foil vapor barrier jacket. Minimum thermal resistance (R-value) shall be 4.6 ft.2-Hr.-F/BTU-In. at mean temperature of 75oF. Piping system, location and insulation thickness shall be as scheduled below. 1. Domestic Hot and Cold Water & Domestic Hot Water Recirculation: In building to 2 inches; one half (1/2) inch. 2. Cooling Coil Metallic Pipe Condensate Drains: In building-all sizes; ½ -inch. 3. Domestic hot and cold water: In-building; 2 ½-inch and larger; one (1) inch. B. FLEXIBLE ELASTOMERIC CLOSED-CELL INSULATION Minimum thermal resistance (R-value) shall be 3.9 Ft.2-Hr-F/BTU-In at mean temperature of 75°F. Piping system, location and insulation thickness shall be as scheduled below. 1. Refrigerant Suction. Outside of building and inside building; 1-inch thick. 2. Refrigerant Hot Gas. Outside of building and inside building; 1-inch thick. 3. Refrigerant Liquid. Outside of building and inside of building; 1-inch thick. C. DUCTWORK SYSTEMS INSULATION 1. Insulate ductwork in accordance with the following type and thickness of insulation. System Insulation Rectangular and Round Exhaust Air, 1 ½ -inch Flexible Fiberglass Concealed Round Supply Air, Outside Air Duct Insulation with FSK Vapor Ductwork Barrier Jacket Rectangular Supply and Return Air Ductwork 1-inch Fiberglass Acoustical Duct Liner Kitchen Hood Exhaust Ductwork 2 Layers Fire Wrap Insulation D. EQUIPMENT INSULATION BICKFORD OF CARMEL, IN 12/12/2012 MECHANICAL INSULATION 15250-3 1. Insulate each item of equipment with the following type and thickness of insulation. EQUIPMENT INSULATION Domestic Water Heaters Factory Insulated 3.2 DUCTWORK A. 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. Clean and dry ductwork prior to insulating. Butt insulation joints firmly together to ensure complete and tight fit over surfaces to be covered. Maintain integrity of vapor-barrier on ductwork insulation, and protect it to prevent puncture and other damage. Extend ductwork insulation without interruption through walls, floors and similar ductwork penetrations, except where otherwise indicated. Install duct liner in accordance with SMACNA HVAC Duct Construction Standards. 3.3 FIBERGLASS INSULATION INSTALLATION A. PIPING Apply insulation to clean, dry piping with joints tightly butted. Adhere "factory applied vapor barrier jacket lap" smoothly and securely at longitudinal laps with a white vapor barrier adhesive. Provide similar lap where new insulation butts to existing pipe insulation, three-inch wide. Adhere three-inch wide self-sealing butt joint strips over end joints. B. FITTINGS 1. Insulate fittings with same type and thickness of insulation as pipe, with ends of insulation tucked snugly into throat of fitting and edges adjacent to pipe insulation tufted and tucked in. Cover insulation with one piece PVC fitting cover secured by taping ends to adjacent pipe covering. 2. Contractor option - built-up to equivalent thickness with insulating cement. Finish jacket to match adjacent piping. Jacket to extend two inches onto adjacent insulation. C. VALVES Insulate and finish by one of the following: 1. With hydraulic setting insulating cement, or equal, to a thickness equal to adjoining pipe insulation. 2. With segments of molded insulation securely wired in place. 3. With prefabricated covers made from molded pipe insulation finished with vapor barrier adhesive. 4. One-piece PVC insulated cover with cover secured by taping the ends to adjacent pipe covering. 5. Finish all valves with four (4) ounce canvas jacket and coat with vapor barrier adhesive unless using one-piece PVC insulated covers. 3.4 FLEXIBLE ELASTOMERIC CLOSED-CELL INSULATION INSTALLATION A. PIPING BICKFORD OF CARMEL, IN 12/12/2012 MECHANICAL INSULATION 15250-4 1. Insulation shall fit in snug contact with pipe and be installed in accordance with manufacturer’s recommendations. Stagger joints on layered insulation. Slip insulation on tubing before tubing sections and fittings are assembled keeping slitting of insulation to a minimum. Seal joints in insulation. A. FITTINGS 1. Insulate fittings with sheet insulation and as recommended by manufacturer. 3.5 EQUIPMENT INSULATION INSTALLATION A. 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. 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. Maintain integrity of vapor-barrier on equipment insulation and protect it to prevent puncture and other damage. END OF SECTION