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MECHANICAL INSULATION <br />Section 15250 <br />15-1207 <br />PART 3 - EXECUTION <br />3.01 GENERAL <br />A. Insulation to be stored on jobsite in clean / dry location. Any insulation exposed to water <br />must be discarded immediately and removed from jobsite. <br />3.02 INSTALLATION OF PIPING INSULATION <br />A. Install piping insulation products in accordance with manufacturer's written instructions and <br />in accordance with recognized industry practices. <br />B. Installation to be installed after installation of heat tracing, testing, acceptance of testing, and <br />cleaning of pipe. <br />C. Insulate each continuous run of piping with full-length units of insulation. Cut pieces to size <br />as required. Do not use multiple cut pieces and/or scraps abutting each other. <br />D. Clean and dry piping surfaces prior to insulating. Butt insulation joints firmly together to <br />ensure complete and type fit over surface to be covered. <br />E. Install piping insulation without interruption through walls and floors except where otherwise <br />indicated. <br />F. Taper raw ends of insulation and seal with canvas and sealant as noted for fittings. <br />G. Install pipe hangers on the outside of the insulation. <br />3.03 INSTALLATION OF CONCEALED DUCTWORK INSULATION: <br />A. Install ductwork insulation products in accordance with manufacturer's written instructions <br />and in accordance with recognized industry practices. <br />B. Prior to applying duct wrap, sheet metal duct shall be clean, dry and tightly sealed at all <br />joints and seams. <br />C. Wrap insulation around duct with facing to the outside so the 2" flap completely overlaps <br />facing and insulation at the other end of stretch out. Insulation shall be snugly butted. <br />D. Secure seams with outward clinching staples on 6" centers. <br />E. Neatly cut insulation at all volume control dampers. <br />F. Tape all seams and loose edges with scrim backed foil tape. <br />G. For ducts which are greater than 24" wide, provide mechanical fasteners at bottom of duct <br />spaced at a maximum of 18" on center. <br />a. Fasteners to be weld pins or clinch pins. Adhesive type pins shall not be <br />used. <br />rd <br />