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TranSystems Corporation - LGM Construction

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501070099 Federal Express Oakland Sort Expansion Issued for Bid 10/11<br />

support. Saddle thickness shall be identical to adjacent pipe insulation and shall be furnished with<br />

jacketing material identical with jacket of adjacent pipe insulation. Saddle jacketing shall be<br />

adhered to adjacent pipe insulation jacketing utilizing adhesive compatible with overall insulation<br />

system maintaining complete vapor barrier integrity where so required. Saddle shall project 4<br />

inches beyond each edge of specified sheet metal shield.<br />

E. Pipe insulation saddles for services insulated with flexible elastomeric pipe insulation shall be<br />

made in accordance with the insulation manufacturer's recommendation of 1" diameter wooden<br />

plugs cemented in place and sealed. The wooden plugs shall be in pairs set at 45 angles from the<br />

vertical within the saddle on 3" centers with a minimum of 6 plugs per saddle.<br />

PART 3 - EXECUTION<br />

3.1 INSTALLATION<br />

A. Surfaces to receive insulation shall be free of rust, scale or dust, and be clean and dry.<br />

B. Insulation shall be applied with tightly butted joints, free of voids and gaps. All fasteners and<br />

bands shall be neatly aligned and overall appearance of work shall be subject to Engineer's<br />

approval.<br />

3.2 INSULATION SPECIFICATION NO. 1 FLEXIBLE ELASTOMER - PIPE<br />

A. Insulation shall be slipped onto the pipe without slitting wherever possible. All slits and end joints<br />

shall be completely sealed using the specified contact adhesive to provide a perfect vapor seal.<br />

Contact adhesive shall be applied to both surfaces to be joined and shall be dry to light touch<br />

before joining surfaces to assure proper seal and adhesion.<br />

B. Fitting, valve, and flange insulation shall be field mitered from the same material and thickness as<br />

adjacent pipe insulation and shall be applied to the fitting using the specified contact adhesive for<br />

flexible elastomer material. Valves may be insulated with sheet insulation secured with contact<br />

adhesive.<br />

3.3 INSULATION SPECIFICATION NO. 2 FIBERGLASS - PIPE<br />

A. One piece fiberglass pipe insulation shall be snapped on the pipe and butted tightly to the adjacent<br />

piece of insulation. The self-sealing lap shall be neatly and snugly secured using a sealing tool to<br />

thoroughly rub the pressure sensitive self-sealing lap joints. Care must be exercised to make<br />

certain that the jacket surfaces to be sealed are dry and free from dust. End butt joints between<br />

sections of insulation shall be sealed similarly with pressure sensitive butt strips. Self-sealing lap<br />

shall only be applied when the ambient temperature is between 35 Deg F and 110 Deg F.<br />

B. Pre-molded PVC fittings shall be applied by first selecting the proper size insulation insert and<br />

neatly applying it to the fitting. Ends shall be tucked in and the edges adjacent to the pipe<br />

covering shall be tufted and tucked in, completely filling the void and insulating the fitting. The<br />

PVC cover shall then be applied. For heated service, the cover may be stapled, or taped in place.<br />

For cold or chilled water service, the PVC cover shall be taped in place with the specified tape to<br />

completely vapor seal the insulation. Staples and tacks shall not be permitted.<br />

3.4 INSULATION SPECIFICATION NO. 9 FIBERGLASS DUCT WRAP<br />

INSULATION 15250-4

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