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    SECTION 15260

    PIPING AND DUCTWORK INSULATION

   PART 1 - GENERAL

   1.01 SECTION INCLUDES

    A. Piping insulation.

    B. Ductwork Insulation.

    C. Jackets and accessories.

   1.02 PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION

    A. Section 15410 - Plumbing Piping: Placement of hangers and hanger inserts.

   1.03 RELATED SECTIONS

    A. Section 09900 - Painting: Painting insulation jacket.

   1.04 REFERENCES

    A. ASTM B209 - Aluminum and Aluminum-Alloy Sheet and Plate.

    B. ASTM C195 - Mineral Fiber Thermal Insulation Cement.

    C. ASTM C335 - Steady-State Heat Transfer Properties of Horizontal Pipe Insulation.

    D. ASTM C518 - Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus.

    E. ASTM C585 - Inner and Outer Diameters of Rigid Thermal Insulation for Nominal Sizes of Pipe and Tubing (NPS System).

    F. ASTM C921 - Properties of Jacketing Materials for Thermal Insulation.

    G. ASTM D1056 - Flexible Cellular Materials - Sponge or Expanded Rubber.

    H. ASTM D2842 - Water Absorption of Rigid Cellular Plastics.

    I. ASTM E84 - Surface Burning Characteristics of Building Materials.

    J. ASTM E96 - Water Vapor Transmission of Materials.

    K. NFPA 255 - Surface Burning Characteristics of Building Materials.

    L. UL 723 - Surface Burning Characteristics of Building Materials.

   1.05 SUBMITTALS

    A. Submit under provisions of Section 01300.

    B. Product Data: Provide product description, list of materials and thickness for each service, and locations.

    C. Manufacturer's Installation Instructions: Indicate procedures which ensure acceptable workmanship and installation standards will be achieved.

   1.06 QUALITY ASSURANCE

    A. Materials: Flame spread/smoke developed rating of 25/50 or less in accordance with ASTM E84, NFPA 255.

   1.07 QUALIFICATIONS

    A. Applicator: Company specializing in performing the work of this section with minimum three years experience.

   1.08 DELIVERY, STORAGE, AND HANDLING

    A. Deliver, store, protect, and handle products to site under provisions of Section 01600.

    B. Deliver materials to site in original factory packaging, labelled with manufacturer's identification, including product density and thickness.

    C. Store insulation in original wrapping and protect from weather and construction traffic.

    D. Protect insulation against dirt, water, chemical, and mechanical damage.

   1.09 ENVIRONMENTAL REQUIREMENTS

    A. Maintain ambient temperatures and conditions required by manufacturers of adhesives, mastics, and insulation cements.

    B. Maintain temperature during and after installation for minimum period of 24 hours.

   PART 2 - PRODUCTS

   2.01 GLASS FIBER

    A. Manufacturers:

    1. Owens-Corning Fiberglass Mfg.

    2. Other acceptable manufacturers offering equivalent products.

    a. Certain Teed Products Corp.

    b. Knauf Fiberglass Corp.

    c. Manville Corporation

    B. Insulation: ASTM C547; rigid molded, noncombustible.

    1. 'K' ('ksi') Value: ASTM C335, 0.24 at 75 degrees F 0.035 at 24 degrees C.

    2. Minimum Service Temperature: -20 degrees F -28.9 degrees C.

    3. Maximum Service Temperature: 300 degrees F 150 degrees C.

    4. Maximum Moisture Absorption: 0.2 percent by volume.

    C. Vapor Barrier Jacket

    1. ASTM C921, White kraft paper reinforced with glass fiber yarn and bonded to aluminized film.

    2. Moisture Vapor Transmission: ASTM E96; 0.02 perm inches.

    3. Secure with self sealing longitudinal laps and butt strips.

    4. Secure with outward clinch expanding staples and vapor barrier mastic.

    D. Tie Wire: 18 gage (1.2 mm) stainless steel with twisted ends on maximum 12 inch (300 mm) centers.

    E. Vapor Barrier Lap Adhesive

    1. Compatible with insulation.

    F. Insulating Cement/Mastic

    1. ASTM C195; hydraulic setting on mineral wool.

    G. Fibrous Glass Fabric

    1. Cloth: Untreated; 9 oz/sq yd (305 g/sq m) weight.

    2. Blanket: 1.0 lb/cu ft (16 kg/cu m) density.

    H. Indoor Vapor Barrier Finish

    1. Vinyl emulsion type acrylic, compatible with insulation, white color.

   PART 3 - EXECUTION

   3.01 EXAMINATION

    A. Verify that piping has been tested and approved before applying insulation materials.

    B. Verify that surfaces are clean, foreign material removed, and dry.

   3.02 INSTALLATION

    A. Install materials in accordance with manufacturer's instructions.

    B. On exposed piping, locate insulation and cover seams in least visible locations.

    C. Inserts and Shields:

    1. Application: Piping 1-1/2 inches (40 mm) diameter or larger.

    2. Shields: Stainless steel between pipe hangers and inserts.

    3. Insert Location: Between support shield and piping and under the finish jacket.

    4. Insert Configuration: Minimum 12 inches (305 mm) long, of same thickness and contour as adjoining insulation; may be factory fabricated.

    5. Insert Material: Other heavy density insulating material suitable for the planned temperature range.

    D. Finish insulation at supports, protrusions, and interruptions.

    E. For heat traced piping, insulate fittings, joints, and valves with insulation of like material, thickness, and finish as adjoining pipe. Size large enough to enclose pipe and heat tracer. Cover with [aluminum] [stainless steel] jacket with seams located on bottom side of horizontal piping.

    F. Insulate piping and equipment less than 8 foot above finished floors in locations accessible to personnel contact so that temperatures of exposed surfaces do not exceed 180 degrees F (82 degrees C).

    G. Carry vapor barriers down and seal to the cold surface at not more than 50 foot (15 meters) intervals on horizontal runs and at not more than 10 foot (3 meters) intervals on vertical runs.

    H. Seal hanger rod on pipes carrying fluids of less than 70 degrees F (21 degrees C) to a point of 2 inches (51 mm) minimum above the top of the insulation where the insulation is penetrated.

    I. Overlaps may be secured with outward clinch staples on maximum 4 inch (102 mm) centers. Provide minimum 4 inch (102 mm) wide fiberglass strips applied over the stapled seams with adhesive and seal with a vapor barrier mastic.

    J. Apply vapor barrier jackets on duct work carrying air at temperatures below 75 degrees F (24 degrees C) and on all piping carry fluids below 70 degrees F (21 degrees C).

    K. Vapor barrier jackets may be all purpose jackets, foil-scrim-kraft jacket, minimum 3 mil plastic sheeting, or spray on plastic coatings.

    L. Provide a factory or field applied fiberglass cloth jacket over all vapor barriers, except all purpose jackets, on all piping and ductwork exposed to view or specified to be painted.

    M. Provide a factory or field applied fiberglass cloth jacket over all thermal insulation exposed to view or specified to be painted, except all purpose jackets. Size all insulation exposed to view in accordance with section painting.

    N. Adhesives and fasteners used to secure jackets and covers on insulation to be vermin, rodent and mildew resistant and have a smoke and flame spread rating equal to or greater than the insulation on which applied.

   3.03 TOLERANCE

    A. Substituted insulation materials shall provide thermal resistance within 10 percent at normal conditions, as materials indicated.

   3.04 GLASS FIBER INSULATION SCHEDULE

    PIPING SYSTEMS PIPE SIZE THICKNESS

    Inch (mm) Inch (mm)

    A. Plumbing Systems - Inside Heated Structures

    1. Domestic Hot Water 2 (51) or less 1 (25)

    2. Domestic Cold Water All 1 (25)

    3. Plumbing vent within 10 feet

    (3 meters) of the exterior All 1 (25)

    4. Roof Draw Bodies All 1 (25)

    5. Roof Drain, Storm Water, Piping

    within 10 Ft. (3 meters) of the

    Exterior All 1 (25)

    6. Roof Drain, Storm Water Piping

    Horizontal Runs All 1 (25)

    DUCT SIZE THICKNESS

    Inch (mm) Inch (mm)

    B. Ductwork Systems - Inside Heated Structures

    1. Exhaust and Foul Air Pipes Ducts

    within 10 Ft. (3m) of Exterior

    Openings All 1 (25)

    2. Ducts (Outdoor Intakes) and Air

    Filter Housings Exposed to Outdoor

    Air Temperatures All 2 (51)

    END OF SECTION