PRESTON HEALTH SERVICES ARCHITECT S NO. 2700

Transcription

1 SECTION PLUMBING INSULATION PART 1 - GENERAL 1.1 DESCRIPTION OF WORK: A. All work covered in this section consists of furnishing all labor, equipment, materials and accessories, and performing all operations required, for the correct fabrication and installation of thermal insulation applied to piping and equipment. 1.2 DEFINITIONS: A. Exposed piping is that which can be seen when the building is complete without opening or removing access door panels, or ceilings tiles. This also includes all mechanical equipment rooms and pipe tunnels. B. Concealed piping are those elements above ceilings, in chases, interstitial space and pipe spaces. Other piping is considered to be exposed. C. Exterior piping is that which is exposed to the weather and/or outside the building envelope. Piping protected by overhangs, areaways, etc., exterior to the building envelope are considered exterior. D. ASJ: All service jacket, white finish facing or jacket. E. Air conditioned space: Space directly supplied with heated or cooled air. F. Cold: Equipment or piping handling media at design temperature of 60 degrees F or below. G. FRK: Foil reinforced kraft facing. H. FSK: Foil-scrim-kraft facing. I. Hot: Equipment or piping handling media above 105 degrees F. J. Pcf: Density, pounds per cubic foot. K. Runout: Branch pipe connection up to one inch nominal size to a one terminal piece of equipment (fan coil, terminal box). L. Thermal conductance: Heat flow rate through materials. 1. Flat surface: BTU per hour per square foot. 2. Pipe or cylinder: BTU per hour per linear foot. 3. Thermal conductivity (k): BTU per inch thickness, per hour, per square foot, per degree Fahrenheit temperature difference. PLUMBING INSULATION

2 1.3 QUALITY ASSURANCE: A. Products of the manufacturers, herein, will be acceptable for use for the specific functions noted. All materials shall be compatible with the materials to which they are applied, and shall not corrode, soften or otherwise attack such materials in either the wet or dry state. B. Materials shall be applied subject to their temperature limits. Any methods of application of insulation materials or finishes not specified in detail herein shall be in accordance with the particular manufacturer's published recommendations. C. Insulation shall be applied by experienced workers regularly employed for this type work. 1.4 RATING: A. All insulation shall have composite surface burning characteristic rating as tested by ASTM E 84, UL 723, or NFPA 255 not exceeding: Flame Spread 25 Smoke Developed 50 B. Composite shall include insulation, jacketing and adhesive used to secure jacketing or facing. All accessory items such as PVC jacketing and fittings, adhesive, mastic, cement, tape and cloth shall have the same component rating as specified above. 1.5 STANDARDS: A. ANSI/ASHRAE Standard Energy Standard for Buildings Except Lowrise Residential Buildings. B. Midwest Insulation Contractors Association Commercial and Industrial Insulation Standards - Third Edition. 1.6 SUBMITTALS: A. Submittals shall include all materials used, including: 1. Insulation 2. Jacketing 3. Tapes 4. Hardware 5. Mastics 6. Adhesives B. Submittals shall be formatted to include a list of materials for each service: C. Submittals shall use pages from Midwest Insulation Contractors Association - Commercial and Industrial Insulation Standards for defining how insulation PLUMBING INSULATION

3 PART 2 - PRODUCTS materials will be applied. 2.1 GLASS FIBER INSULATION: A. Nominal minimum thicknesses are listed in the table at the end of this section. These thicknesses are based on insulation having a thermal resistivity between 4.0 to 4.6 sq. ft.-hr.-f/btu-in. on a flat surface resistivity to maintain equivalent insulation value. B. Insulation shall be 850 deg. F rated as manufactured by Owens Corning, Manville or Knauf. C. Insulation shall have factory-applied, reinforced, flame retardant, vapor barrier jacket equal to Owens-Corning ASJ with selfsealing lap. Butt joints shall be taped with field-applied ASJ tape 3 in. wide. D. Refer to the table at the end of this section for required pipe insulation thicknesses. E. Routed or molded fitting insulation shall be Hamfab. 2.2 CELLULAR GLASS: A. Piping: Cellular glass insulation conforming to ASTM C552 shall be manufactured by Pittsburgh Corning Corporation. B. Fitting insulation shall be fabricated shapes of cellular glass. 2.3 ELASTOMERIC CLOSED CELL INSULATION: A. Tubing and Sheet shall be flexible fire retardant closed cell, conforming to ASTM C 534, and ASTM Thermal resistivity shall be 3.70 sq.ft.-hr-f/btu-in. Insulation shall be Rubatex or Armaflex. 2.4 FINISHES: A. Metal jacketing, smooth.016 in. thick, type T 3003 aluminum with laminated moisture barrier. Jacketing shall be Childers, aluminum roll jacketing with Polykraft moisture barrier. Jacketing shall be embossed "No Asbestos" on a 6 inch spacing. B. Metal fitting covers shall be two piece aluminum. Covers shall be Ell-Jac. C. Foil scrim kraft (FSK) jacket, flame retardant vapor barrier. Jacket shall be Alpha Temp 10651, all service jacket. D. Fitting covers shall be one piece 20 mil PVC, covers shall be Ceel-Tite 550 PVC-UVR by Ceel-Co. Zeston and Proto are approved equals. E. Water based latex enamel equal to Armstrong WB Armaflex Finish. PLUMBING INSULATION

4 2.5 MISCELLANEOUS: A. Adhesives: 1. Glass & Mineral Fiber - Foster / Vimasco Cellular Glass - Pittcote 300 / Childers CP-30. B. Mastic (Weather Barrier): 1. Foster Mastic / Vimasco. 2. Childers Vi-Cryl CP10/ Vimasco WC-5. C. Coatings: 1. Foster - Monolar Coating / Vimasco 2. Foster Sealfas / Vimasco 3. Foster Tite-Fit / Vimasco 4. Pittcote 300 D. Vapor Barrier Sealant: Foster Flextra E. FSK tape 3 in. wide, equal to Nashua FSK. F. Roll on Corner bead (2 in. x 2 in., 26 ga. galvanized steel). G. Fiber reinforced tape - Nashua 357, or 398. H. Insulation protection shields - Grinnell fig 167. I. Rigid insulation inserts - Hamfab. J. Reinforcing Cloth - Vimasco, Elastafab 894, conforming to ASTM D1668. K. Bands in., aluminum, ½ in. wide, embossed continuously with the legend "No Asbestos". L. Hexagonal Wire Netting - One inch mesh, 22 ga. galvanized steel. PART 3 - EXECUTION 3.1 GENERAL: A. Insulation shall be applied to clean and dry surfaces after tests and approvals required by this specification have been completed. B. On cold surfaces where a vapor barrier must be maintained, insulation shall be applied with a continuous, unbroken moisture and vapor seal. All hangers, supports, anchors, or other projections that are secured to cold surfaces shall be PLUMBING INSULATION

5 insulated and vapor sealed to prevent condensation. C. All surface finishes shall be extended in such a manner as to protect all raw edges, ends and surfaces of insulation. D. All pipe insulation shall be continuous through walls, ceiling or floor openings, or sleeves; except where firestop or firesafing materials are required. E. Metal shields shall be installed between hangers or supports and the piping insulation. Rigid insulation inserts shall be installed as required between the pipe and the insulation shields. Inserts shall be of equal thickness to the adjacent insulation and shall be vapor sealed as required. F. Size insulation to cover electric heat tracing on piping where it is specified. G. All clevis type pipe supports shall be sized to fit the outside diameter of the insulation. H. Insulate valves, fittings, flanges etc. with the same thickness of insulation as specified for piping. I. Install longitudinal jacketing laps to shed rainwater. J. Repair insulation damaged by work under this contract to match existing work or replace damaged portion with insulation specified for new work. K. Piping covered with metal or P.V.C. jacketing systems shall have the joints made to shed water. Laps shall be positioned in the bottom quadrant on horizontal pipe. 3.2 PLUMBING SYSTEMS: A. Domestic Water Piping: 1. See schedule at the end of the section for thickness. 2. Each section of insulation shall be firmly butted and secured with ASJ or SSL butt strips a minimum 3 inches wide. ASJ jacket laps and butt strips shall be secured with outward clinch staples at 4 inch spacing (hot piping only). 3. All fittings and valves shall be insulated with preformed fiber glass fittings or mitered sections of pipe insulation. Insulation shall be of equal thickness to the adjacent pipe insulation. 4. Insulate flanges and unions![on electric traced piping] with insulation of same thickness as specified for pipe connected to flanges. Do not insulate flanges and unions or low temperature (below 120 deg. F) water systems. 5. Provide rigid insulation inserts per manufacturer's recommendations at each support. PLUMBING INSULATION

6 6. Provide insulation shield at each support. B. Cold Piping (Cellular Glass Only): 1. Insulate horizontal rain leaders (normal and emergency) in ceiling plenums. 2. Thickness: a. All sizes - 1-1/2 inch thick. 3. The insulation shall be applied with all joints buttered full depth with mastic or joint sealant. The insulation sections shall be staggered and tightly butted together, except at contraction joints. Use ½" x 0.015" aluminum bands 12" on center. The mastic or joint sealant shall be white in color. 4. Insulation for fittings, valves, and flanges shall be sized to match adjacent straight run pipe insulation and fabricated from cellular glass. All joints shall be sealed as above. Large voids between the insulation and fitting shall be filled with a polyurethane foam. 5. Insulation shall be covered with field or factory applied All Service Jackets. Overlap on the longitudinal seams shall be sealed with vapor seal adhesive and stapled. Overlap jacket along pipe length and seal with adhesive. 6. Provide at each support a curved insulation protection shield. 7. Cover each staple with vapor seal mastic. C. Elastomeric: 1. Apply closed cell elastomeric insulation to all pipes, equipment and surfaces listed below. 2. Secure insulation with contact adhesive in accordance with manufacturers instructions. 3. Insulate fittings and valves with miter cut pieces of insulation same thickness as piping. 4. Insulated surfaces: a. Roof Drains - 1 in. thick. b. Waste piping from electric cooler - 1 in. thick. c. Waste piping from ice maker - 1 in. thick. d. Cooling coil condensate piping - 1 in. thick. PLUMBING INSULATION

7 e. Waste piping and p-traps from floor drains above ground receiving cooling coil condensate - 1 in. thick. f. Covers and caps for all valve stems and operators, gauge cocks, thermometer wells and other appurtenances subject to sweating. D. Finishes: 1. Paint: a. Exposed or exterior installations of elastomeric closed cell insulation shall be painted with two coats of water base latex enamel. Domestic Water Piping Insulation Thickness for Pipe Sizes (Fiberglass) Temperatures o F Up to 1 1/4 in. (In.) 1-1/2 in and Larger (in.) Cold Water Freeze Protection Insulation Thickness - Heat Tracing Input Ambient Design Temperature - 20 o F Pipe Size Insulation Thickness Heat Loss watts/ft. 3/4-3 in in in. 2 8 NOTE: Do not staple insulation jackets to electric heat tracing lines. END OF SECTION PLUMBING INSULATION

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