Division 22 23 Ebook Page 254 Section 23 07 19 HVAC Piping Insulation-Fiberglasí Insulation

HVAC PIPING INSULATION 23 07 19 - 6 HVAC Piping Insulation FIBERGLAS Insulation B. Support piping so that the insulation is not compromised by the hanger or the effects of the hanger. Provide hanger spacing so that the circumferential joint may be made outside the hanger. Cover the evaporating holes with sealing tape for the length of the metal saddle. 1. Piping systems 3 in (75 mm) in diameter or less, insulated with fiberglass pipe insulation, may be supported by placing saddles of the proper length and spacing under the insulation. 2. For hot or cold piping systems larger than 3 in (75 mm) in diameter, operating at temperatures less than +200F (93C) and insulated with fiberglass, provide inserts such as foam or high-density fiberglass with sufficient compressive strength to support the weight of the piping system. 3. At vertical runs, provide insulation support rings, as indicated on Drawings. C. Fittings: 1. For systems operating below ambient temperature, wrap valves, fittings, and similar items in each piping system with wicking material to ensure a continuous path (100% coverage) for the removal of condensation, prior to installing insulation. 2. Cover valves, fittings, and similar items in each piping system using one of the following: a. Mitered sections of insulation equivalent in thickness and composition to that installed on straight pipe runs. b. Insulation cement, equal in thickness to the adjoining insulation. c. PVC Fitting Covers insulated with material equal in thickness and composition to adjoining insulation. 3. Seal fitting joints with vapor retarder sealing tapes or mastics. 4. Use standard oversizing practices for valves and flanges. D. Penetrations: Extend piping insulation without interruption through walls, floors and similar piping penetrations, except where otherwise specified. E. Joints: Butt pipe insulation against hanger inserts. For hot pipes, stagger joints when operating temperature is over 400F (204C) double layer. Seal jacketing according to type being used. Seal self- sealing laps by firmly rubbing down surface of tape and flap. 1. Taper and seal pipe insulation ends, regardless of service. F. Vertical Piping: Protect vertical piping to a height of 8 ft -0 in (2.4 m) above the floor. Jacket insulated, exposed vertical piping within the building and insulated piping exposed to the outdoors with minimum 0.016 in thick (0.4 mm) aluminum. Note to Specifier: Include the following only in the Midwestern US, where this association's publications are commonly used. G. Accessory Materials: Install in conformance with the current edition of the Midwest Insulation Contractors Association (MICA) "Commercial & Industrial Insulation Standards." 3.5 FIELD QUALITY ASSURANCE A. Upon completion of insulation work, visually inspect the work and verify that it has been correctly installed. This may be done while work is in progress, to assure compliance with requirements herein to cover and protect insulation materials during installation.

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