Amen. 3- WAPA Construction Standard on piping insulation.docx

Please provide specification for Insulation requirements.

22 07 19 PLUMBING PIPING INSULATION:

1. GENERAL:

Performance Requirements: Provide noncombustible thermal-insulation system materials, as defined by NFPA 220. Provide adhesives, coatings, sealants, facings, jackets and thermal-insulation materials, except cellular elastomers, with a flame-spread classification (FSC) of 25 or less, and a smoke-developed classification (SDC) of 50 or less. Determine these maximum values in accordance with NFPA 255. Provide coatings and sealants that are nonflammable in their wet state. Provide adhesives, coatings and sealants with published or certified temperature ratings suitable for the entire range of working temperatures normal for the surfaces to which they are to be applied.

Submittals: Submit in accordance with Section 01 00 00, “General Requirements”.

2. PRODUCTS:

Provide compatible materials which do not contribute to corrosion, soften or otherwise attack surfaces to which applied, in either the wet or dry state. ASTM C795 requirements for materials to be used on stainless steel surfaces. Provide materials that are asbestos free.

Insulation Materials: Provide materials with maximum value conductance as tested at any point, not an average. Replace or augment insulation conductance found by test to exceed the specified maximum by an additional thickness to bring it to the required maximum conductance and a complete finishing system.

Adhesives:

1) Cloth Adhesives: Provide adhesives for adhering, sizing and finishing lagging cloth, canvas and open-weave glass cloth with a pigmented polyvinyl acetate emulsion conforming to the requirements of ASTM C916, Type I.

2) Vapor-Barrier Material Adhesives: Provide adhesives for attaching laps of vapor-barrier materials and presized glass cloth for attaching insulation to itself, to metal, and to various other substrates, of nonflammable solvent-base, synthetic-rubber type conforming to the requirements of ASTM C916, Type I, for attaching fibrous-glass insulation to metal surfaces.

3) Cellular Elastomer Insulation Adhesive: For cellular elastomer insulation adhesive, provide a solvent cutback chloroprene elastomer conforming to ASTM C916, Type I, and be of a type approved by the manufacturer of the cellular elastomer for the intended use.

Insulating Cement:

1) General Purpose Insulating Cement: Provide general purpose insulating cement, conforming to ASTM C195. Ensure composite is rated for 1800-degrees Fahrenheit service, with a thermal-conductivity maximum of 0.85-Btu by inch per hour per square foot for each degree Fahrenheit temperature differential at 200-degrees Fahrenheit mean temperature for 1-inch thickness.

2) Finishing Insulating Cement: Provide finishing insulating cement of a mineral-fiber, hydraulic-setting type conforming to ASTM C 449

Caulking:

Provide elastomeric joint sealant for caulking specified insulation materials in accordance with ASTM C920, Type S, Grade NS, Class 25, Use A.

Corner Angles:

Provide nominal 0.016-inch aluminum 1- by 1-inch corner angle piping insulation with factory applied kraft backing. Ensure aluminum conforms to ASTM B209, Alloy.

Jacketing:

1) Aluminum Jacket: Provide aluminum jackets conforming to ASTM B209, Temper H14, minimum thickness of 0.016-inch, with factory-applied polyethylene and kraft paper moisture barrier on inside surface. Provide smooth surface jackets for jacket outside diameters less than 8-inches. Provide corrugated surface jackets for jacket outside diameters 8-inches and larger. Provide stainless steel bands, minimum width of 0.5-inch. Provide factory prefabricated aluminum covers for insulation on fittings, valves and flanges.

2) Asphalt-Saturated Felt: Provide asphalt-saturated felt conforming to ASTM D226/D226M, without perforations, minimum weight of 10-pounds per 100-squarefeet.

3) Stainless Steel Jacket: Provide stainless steel jackets conforming to ASTM A167 or ASTM A240/A240M; Type 304, minimum thickness of 0.010-inch, smooth surface with factory-applied polyethylene and kraft paper moisture barrier on inside surface.

Provide stainless steel bands, minimum width of 0.5-inch. Provide factory prefabricated stainless steel covers for insulation on fittings, valves and flanges.

4) Glass Cloth Jacket: Provide plain-weave glass cloth conforming to ASTM D579, Style 141, weighing not less than 7.23-ounces per square yard before sizing. Factory apply cloth wherever possible. Provide leno weave glass reinforcing cloth, 26-end and 12-pick thread conservation, with a warp and fill tensile strength of 45- and 30-pounds per inch of width, respectively, and a weight of not less than 1.5-ounces per square yard.

5) PVC Jacket: Provide 0.010-inch thick, factory-premolded, 1-piece fitting, pipe-barrel sheeting vapor-barrier jacketing polyvinylchloride that is self-extinguishing, high-impact strength, moderate chemical resistance with a permeability rating of 0.01-grain per hour per square foot per inch of mercury pressure difference, determined in accordance with ASTM E96. Provide manufacturer's standard solvent-weld type vapor-barrier joint adhesive. Conform to ASTM C1136 for, Type I, low-vapor transmission, high-puncture resistance vapor barrier for use on insulation for piping, ducts and equipment.

Coatings:

1) Outdoor Vapor-Barrier Finishing: For coatings for outdoor vapor-barrier finishing of insulation surfaces, such as fittings and elbows, provide a non-asphaltic, hydrocarbon polymer, solvent-base mastic containing a blend of nonflammable solvents. Conform to the requirements of ASTM C1136 and ASTM C921 for coatings.

2) Indoor Vapor-Barrier Finishing: Provide pigmented resin and solvent compound coatings for indoor vapor-barrier finishing of insulation surfaces conforming to ASTM C1136, Type II.

3) Outdoor and Indoor Non Vapor-Barrier Finishing (NBF): Provide pigmented polymer-emulsion type NBF recommended by the insulation material manufacturer for outdoor and indoor NBF coating of insulation surfaces for the surface to be coated and applied to specified dry-film thickness.

4) Cellular-Elastomer Insulation Coating: Provide a polyvinylchloride lacquer approved by the manufacturer of the cellular elastomer finish coating.

5) Coating Color: Conform to the color code specified for the coating color.

Tape: Provide a knitted elastic cloth glass lagging specifically suitable for continuous spiral wrapping of insulated pipe bends and fittings and produce a smooth, tight, wrinkle-free surface. Conform to requirements of SAE AMS 3779, SAE AMS 3779, ASTM D579 and ASTM C921 for tape, weighing not less than10-ounces per square yard.

Hot-Water and Condensate-Return Piping: Provide mineral fiber insulation with glass cloth jacket, Type T-2. Insulate aboveground pipes, valve bodies, fittings, unions, flanges and miscellaneous surfaces.

Cold-Water and Condensate-Drain Piping:

1) Insulate aboveground pipes, valve bodies, fittings, unions, flanges and miscellaneous surfaces.

2) Provide 3/8-inch mineral fiber insulation with glass cloth jacket, Type T-2.

3) Provide cellular-elastomer insulation conforming to ASTM C534, with water-vapor permeability not exceeding 0.1-grain per square foot per hour per inch mercury pressure-differential for 1-inch thickness.

4) Provide flexible unicellular-elastomeric thermal insulation for cold water piping, Type T-3. Use expanded, closed-cell pipe insulation only aboveground, not for underground piping.

Refrigerant Suction Piping:

Provide cellular-elastomer insulation, Type T-3, with a nominal thickness of 3/4-inch. Insulate surfaces, including valve, fittings, unions and flanges.

Condensate Piping, 350 PSIG: Provide calcium silicate insulation with glass cloth jacket, Type T-5 based on an 80-degrees Fahrenheit ambient temperature in still air with an insulation “K” factor of 0.37 at 200-degrees Fahrenheit mean temperature.

Condensate, Weather-Exposed: Provide calcium silicate insulation with weatherproof jacket, Type T-17. Insulate all systems.

3. EXECUTION:

Installation of Insulation Systems:

1) Install smooth and continuous contours on exposed work. Smoothly and securely paste down cemented laps, flaps, bands and tapes. Apply adhesives on a full-coverage basis.

2) Apply insulation only to system or component surfaces that have been tested and approved.

3) Install insulation lengths tightly butted against each other at joints. Where lengths are cut, provide smooth and square and without breakage of end surfaces. Where insulation terminates, neatly taper and effectively seal ends or finish as specified.

Direct longitudinal seams of exposed insulation away from normal view.

4) Apply materials in conformance with the recommendations of the manufacturer.

5) Clean surfaces free of oil and grease before insulation adhesives or mastics are applied. Provide solvent cleaning required to bring metal surfaces to such condition.

6) Submit installation drawings for pipe insulation, conforming with the adhesive manufacturer's written instructions for installation. Submit installation manual clearly stating the manufacturer's instructions for insulation materials.