SECTION 15090

INSULATION OF REFRIGERATION SYSTEM

PART 1 - GENERAL

1.01	SCOPE

A.	The work under this section of the specifications shall include the furnishing of all apparatus, tools, labor and materials required for a complete insulation system for all work as specified in Section 15650 - Refrigeration, and as shown on the drawings.

1.02	SUBSTITUTIONS

A.	See Section 15650, Item 1.06, Substitutions.

1.03	MANUFACTURER'S STAMP OR LABEL

A.	Every package or standard container of insulation, jackets, cements,adhesives, and coatings delivered to the project site for use must have the manufacturer's stamp or label attached giving name of manufacturer, brand, and description of material. Insulation packages and containers shall be marked "asbestos-free".

1.04	SUBMITTALS

A.	See Section 15650, Items 1.07, A, B and C. Submit Manufacturer's Data on:

1.	Insulation.

2.	Jackets and casings

3.	Vapor-barrier materials.

4.	Accessory materials.

PART 2 - PRODUCTS

2.01	PIPE AND EQUIPMENT

A.	Insulation shall be expanded polyurethane:

1.	Flame spread, ASTM E-84: less than or equal to 75.

2.	Smoke developed, ASTM E-84: less than or equal to 450.

3.	Density, ASTM D-1622: 1.8 lb./cu.ft. minimum, 2.0 lb./cu.ft. minimum average.

4.	K-Factor, ASTM C-518 At 75`F mean temperature, 0.16 BTU-in./hr.- sq.ft.-`F

5.	Closed Cell Content, ASTM D-1940: Minimum 90%.

B.	Condensate drains insulation shall be cellular rubber, 3/4" thick, over electric heat trace where applicable.

2.02	VAPOR BARRIER

A.	Vapor-Barrier, straight pipe, shall be foil laminate (ASJ).

1.	Permeance, ASTM E-96: Procedure A: Dry cup, 0.02 perms.

2.	Flame spread, ASTM E-84: less than or equal to 5.

3.	Smoke developed, ASTM E-84: less than or equal to 50.

B.	Vapor-Barrier, pipe fittings, valves, and equipment, in order of application:

1.	Coating compound, Foster 60-39 (gray).

2.	Reinforcing fabric, 20 x 20 mesh glass cloth or 6 ounce canvas.

3.	Coating compound, Foster 60-38 (white).

C.	Additional protection, pipe, pipe fittings, valves, and equipment, indoor: PVC.

1.	Flame spread, ASTM E-84: less than or equal to 5.

2.	Thickness: Minimum 0.030 (30 mil).

D.	Additional protection, pipe, pipe fittings, and valves, outdoor: Aluminum.

1.	Thickness: 0.016 to 0.020 inch thick flat.

2.	Finish: Embossed or corrugated.

3.	Type: 3003 (3S), 5005 (5S). or 5010.

4.	Banding: Type 304 stainless, 1/2 inch minimum width, 0.015 inch minimum thickness.

2.03	ADHESIVES, SEALANTS AND COMPOUNDS

A.	For polyurethane insulation, Foster 81-33 (gray).

B.	Between insulation and pipe at 15 foot (maximum) intervals, Foster 95-44 (aluminum).

C.	For ASJ lap joints, Foster 30-35 (white), or Foster 85-75 (off- white).

D.	For PVC joints, clear PVC solvent-adhesive.

E.	For aluminum jacket joints, Foster 95-44 (aluminum).

F.	For attachment of insulation to pressure vessels, Foster 81-33.

PART 3 - EXECUTION

3.01	INSTALLATION

A.	Preparation: Do not apply insulation until surfaces to be covered have been leak tested, have had rust and scale removed, and have been cleaned, dried, and inspected.

B.	Application: Insulation shall be clean and dry when installed and kept dry during finish application. Wetted insulation will not be approved for installation. Install materials neatly with smooth and even surfaces with jackets drawn tight and smoothly cemented down on longitudinal and end laps. Scrap pieces shall not be used where a full- length section will fit. All surface finishes shall be extended to protect all surfaces, ends, and raw edges of insulation. Coatings and adhesives shall be applied at the manufacturer's recommended coverage per gallon.

C.	Name Plates and Access Plates: Do not insulate name plates or ASME labels. Bevel insulation around name plates and ASME stamps.

D.	Pipe Insulation: Install with joints tightly butted. Apply vapor- barrier per 2.02 A. Overlap longitudinal jacket laps not less than 1- 1/2 inches. Wrap butt joints with 3-inch wide strips of the same material as jacket. Cement jacket laps and butt strips with joint sealer.

E.	Flanges, Unions, Valves, and Fittings: Use premolded, precut, or job- fabricated insulation of the same thickness and conductivity as used on adjacent piping. When segments of insulation are used, provide elbows with not less than three segments. For other fittings and valves, cut segments to required curvature, or use nesting size sectional insulation. Place and join the segments of the insulation with adhesive. After the segments are in place, apply vapor-barrier per 2.02.B. Where unions, flanges, and valves are indicated not to be insulated, terminate the covering neatly at the ends with insulation cement trowelled on a bevel. Apply a vapor-barrier coating to the beveled ends. Cover control valves and strainers with removable sections of insulation vapor-barrier-sealed inside and out with adjacent insulation ends neatly finished and vapor-barrier-sealed.

F.	Long runs of pipe: Vapor barriers shall be provided in long runs of pipe at intervals not to exceed l5 feet.

G.	Hangers and Anchors: Continue insulation through pipe hangers and pipe sleeves. Where anchors or hangers are secured to chilled piping to be insulated, insulate hangers or anchors same as piping for a distance not less than four times insulation thickness to prevent condensation.

H.	Sleeves and Wall Chases: Provide a metal jacket over the insulation on pipe passing through sleeves and walls. Where penetrating interior walls, extend the metal jacket 2 inches out on either side of the wall and secure on each end with a band.

I.	Equipment: Insulate cooling and refrigeration equipment, and accessories and cold surfaces as shown on the Drawings.

J.	Equipment Insulation: Apply equipment insulation to fit as closely as possible to equipment. Insulation shall be grooved or scored where necessary to fit the contours of equipment. Stagger end joints where possible. Bevel the edges of the insulation for cylindrical surfaces to provide tight joints. Attach sections of insulation to pressure vessels with adhesive. After the insulation is in place on areas to be insulated, fill joints, seams, chipped edges, or depressions with bedding compound to form a smooth surface. Bevel insulation around name plates, ASME Stamp, and access plates. Insulation on equipment that must be opened periodically for inspection, cleaning, and repair shall be constructed so insulation can be removed and replaced without damage. Apply vapor-barrier per 2.02.B.

3.02	ADDITIONAL VAPOR BARRIER PROTECTIVE COVERING AND JACKETS

A.	Indoor: Install PVC vapor-barrier covering over all insulated and vapor-barrier sealed pipe, fittings, valves, and equipment. Control valve and strainer PVC covering shall be sealed to adjacent PVC covering with white silicone sealant such that, for access, the silicone bead can be cut and resealed after the vapor-barrier sealed control valve and strainer insulation segments are re-installed.

B.	Outdoor: Install aluminum vapor-barrier covering over all insulated and vapor-barrier sealed pipe, fittings, valves, and equipment. Metal jackets shall have side and end laps at least 2 inches wide with the cut edge of the side lap turned under one inch to provide a smooth edge. Place laps to shed water. Seal laps with vapor barrier and weatherproof coating. Secure jackets in place with stainless steel band. Control valve and strainer aluminum covering shall be sealed to adjacent aluminum covering with gray silicone sealant such that, for access, the silicone bead can be cut and resealed after the vapor-barrier sealed control valve and strainer insulation segments are re-installed.

3.03	FIELD INSPECTION

A.	Visually inspect to insure that materials used conform with specifications. Inspect installations progressively for compliance with requirements.

END OF SECTION