Division 22 23 Ebook Page 253 Section 23 07 19 HVAC Piping Insulation-Fiberglasí Insulation

HVAC PIPING INSULATION 23 07 19 - 5 HVAC Piping Insulation FIBERGLAS Insulation PART 3 - EXECUTION 3.1 EXAMINATION A. Verify that materials and accessories can be installed in accordance with Contract Documents and material manufacturers' recommendations. B. Verify, by inspecting product labeling, submittal data, and/or certifications which may accompany the shipments, that materials and accessories to be installed on the project comply with applicable specifications and standards and meet specified thermal and physical properties. C. Before starting work under this section, carefully inspect the site and installed work of other trades and verify that such work is complete to the point where installation of materials and accessories under this section can begin. 3.2 PREPARATION A. Ensure that surfaces over which insulation is to be installed are clean and dry. B. Ensure that insulation is clean, dry, and in good mechanical condition with factory-applied vapor or weather barriers intact and undamaged. Wet, dirty, or damaged insulation shall not be acceptable for installation. C. Ensure that pressure testing of piping and fittings has been completed prior to installing insulation. 3.3 SAFETY PRECAUTIONS A. Insulation contractor's employees shall be properly protected during installation of insulation. Protection shall include proper attire when handling and applying insulation materials, and shall include, but not be limited to, disposable dust respirators, gloves, hard hats, and eye protection. 3.4 INSTALLATION A. General: Install insulation materials and accessories in accordance with Contract Documents and manufacturer's published instructions to ensure that it will serve its intended purpose. 1. Install insulation on piping subsequent to painting and acceptance tests. 2. Install insulation materials with smooth and even surfaces. Insulate each continuous run of piping with full-length units of insulation, with single cut piece to complete run. Do not use cut pieces or scraps abutting each other. Butt insulation joints firmly to ensure complete, tight fit over piping surfaces. 3. Maintain the integrity of factory-applied vapor retarder jacketing on pipe insulation, protecting it against puncture, tears or other damage. Seal circumferential joints with butt strips that are compatible with ASJ Max facing. Stapling is not required to complete the closure. 4. On cold systems, seal penetrations of the ASJ Max and exposed ends of insulation with vapor barrier mastic. Coat staples used on cold pipe insulation with suitable sealant to maintain vapor barrier integrity. Mastic pipe section ends at every fourth pipe section joint and at each fitting to provide isolation of water incursion. If humidities in excess of 90% are expected, the ASJ Max shall be protected with either a mastic coating or a suitable vapor retarding outer jacket. 5. When multiple layers are required, all inner layer(s) shall be No Wrap.

Previous Page
Next Page