final 23 07 00 HVAC Insulation.pdf

OFFUTT AIR FORCE BASE

(092036) 23 07 00-1 (Repair AHU O-Club, B462)

2010 by FEI

SECTION 23 07 00

HVAC INSULATION

PART 1 - GENERAL

1.1 GENERAL

A. HVAC insulation required by this section is indicated on drawings, and by requirements of this section.

1.2 SUBMITTALS

A. Product Data: Not required.

1.3 QUALITY ASSURANCE

A. Furnish insulation and materials bearing the manufacturer's label. Only mechanics skilled at such work shall apply materials. Insulation and materials shall be by one of the manufacturers listed. Specialty material shall be of the manufacturer indicated or approved equal. Fire and smoke hazard classification ratings on insulation, jacket, and adhesive shall conform to NFPA 255, ASTM E 84, or

UL-723 as follows:

1. Flame Spread Index not exceeding 25.

2. Fuel Contributed not exceeding 50.

3. Smoke Developed Index not exceeding 50.

B. Certifications: Submit certifications or other data as necessary to show compliance with these specifications and governing regulations. Include proof of compliance for test of products for fire rating, corrosiveness, and compressive strength.

C. Manufacturers: Firms regularly engaged in manufacture of HVAC insulation products, of types and sizes required, whose products have been in satisfactory use in similar service for not less than three

(3) years.

D. Subject to compliance with requirements, provide products of one (1) of the following manufacturers:

1. Armacell LLC

2. Dow Chemical Company

3. Johns-Manville Corp.

4. Keene Corp.

5. Knauf Fiber Glass

6. Owens-Corning Fiberglass Corp.

7. Rubatex Corp.

8. Pittsburg Corning Corp.

E. Thermal Conductivity Average Maximum in Btu-in/hr-ft at 75 o F Mean Temperature:

1. Fiberglass Board = 0.26.

2. Fiberglass Blanket = 0.30.

3. Fiberglass Preformed Pipe Insulation = 0.26.

4. Cellular Glass = 0.30.

5. Flexible Elastomeric Cellular = 0.27.

6. Polyisocyanurate = 0.19.

(092036) 23 07 00-2 (Repair AHU O-Club, B462)

7. Calcium Silicate = 0.60 @ 500F.

F. Vapor retarder film and tape shall have a maximum permeance of 0.030 perm.

PART 2 - PRODUCTS

2.1 PIPING SYSTEM INSULATION

A. Piping insulation shall be as scheduled below see insulation schedule on drawings for thicnknesses:

SYSTEM PIPE SIZE AND LOCATION INSULATION AND JACKET

1. Air Conditioning Coil

Condensate Drain

Piping

All above ground piping 1-inch 4-pcf density fiberglass insulation with fire-resistive, ASJ vapor barrier jacket or 1/2-inch fire retardant flexible elastomeric closed-cell plastic foam insulation or

1-inch polyisocyanurate closed cell insulation with vapor retarder film.

2. Hot Water Heating

Supply and Return

Piping (Systems up to

250 F)

Piping in building through

2-inch

1-inch 4-pcf density fiberglass insulation with fire-resistive, ASJ vapor barrier.

3. Hot Water Heating

Piping (Systems up to

250 F)

Piping in building

2-1/2- inch and larger

2–inch 4-pcf density fiberglass insulation with fire-resistive, ASJ vapor barrier jacket.

4. Chilled Water Supply and Return Piping

Piping in building through 4-inch

2-inch 4-pcf density fiberglass insulation with fire-resistive, ASJ vapor barrier jacket or 1-inch polyisocyanurate closed cell

5. Chilled Water Supply and Return Piping

Piping in building 5-inch and larger

2-1/2-inch 4-pcf density fiberglass insulation with fire-resistive, ASJ vapor barrier jacket or 1-1/2-inch polyisocyanurate closed cell

B. All pre-formed fiberglass and elastomeric closed-cell plastic foam pipe insulation shall be provided with self-adhering and self-sealing overlapping flap.

C. Insulation of Piping Specialties on Cold Piping Services: Insulate unions, flanges, strainers, flexible connections, hoses, and expansion joints on cold piping services with flexible elastomeric cellular insulation. Thickness of elastomeric cellular insulation shall be equivalent to thickness of insulation on the piping service as specified in this Section or as shown on the drawings. Insulation shall be sealed to provide a vapor tight barrier. Cold piping services include chilled water systems, and geothermal heat pump water loop systems.

D. Insulation Protection:

(092036) 23 07 00-3 (Repair AHU O-Club, B462)

1. Pipe insulation exposed in finished areas shall be protected with 0.030 inches thick ABS plastic jacketing covers, Ceel-Co 100 Series or approved equal.

2. Pipe insulation exposed in equipment rooms, indoor parking garages and other unfinished areas shall be protected with 0.030 inches thick, ultraviolet resistant, PVC plastic jacketing covers, Ceel-Co 300 Series or approved equal.

3. Pipe insulation exposed to inside air handling unit shall be protected with a pre-fabricated self-adhering and self-sealing sheet type waterproof membrane. Membrane shall be installed according to manufacturer's recommendations for the application at hand. The waterproof membrane shall be Flex-Clad 400 as manufactured by MFM Building Products Corporation of

Coshocton, OH or approved equal.

2.2 DUCT INSULATION

A. Duct insulation shall be as scheduled on the drawings and as follows:

SYSTEM INSULATION

1. Low Velocity Unlined

Ducts (Duct velocities below 2000 fpm)

1-1/2-inch fiberglass flexible insulation, 1.5-pcf density, with heavy duty

FSK vapor barrier. Apply insulation with edges tightly butted secure on

15-inch centers with approved adhesive and pins. Secure joints by overlapping facing or 4-inch wide strips of same material adhered with

Benjamin Foster 85-20 adhesive.

2. VAV Terminal Units

Reheat Coils

Same as low velocity unlined supply ducts.

3. Flexible Duct

Connections

Same as low velocity unlined ductwork.

PART 3 - EXECUTION

3.1 INSTALLATION OF PIPING INSULATION

A. General: Install insulation products in accordance with manufacturer's written instructions, and in accordance with the MICA National Commercial and Industrial Insulation Standards to ensure that insulation serves its intended purpose.

B. Install insulation on pipe systems subsequent to testing and acceptance of tests.

C. 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. The appearance of the completed insulation shall be a significant factor in determining the acceptability of the work.

D. Clean and dry pipe surfaces prior to insulating. Butt insulation joints firmly together to ensure complete and tight fit over surfaces to be covered.

E. Maintain integrity of vapor-barrier jackets on pipe insulation, and protect to prevent puncture or other damage.

F. Where vapor retarders are specified, elbows and fittings shall be wrapped with vapor retarder tape 3-inches wide or shall have PVC jacketing.

(092036) 23 07 00-4 (Repair AHU O-Club, B462)

G. Cover valves, fittings and similar items in each piping system with equivalent thickness and composition of insulation applied to adjoining pipe run. Install factory-molded, pre-cut or job-fabricated units (at installer's option) except where specific form or type is indicated.

H. Extend piping insulation without interruption through walls, floors and similar piping penetrations, except where otherwise indicated.

I. Insulated piping systems shall be supported on the exterior of the insulation surface. Install protective metal shields and insulated inserts wherever needed to prevent compression of insulation.

J. Metal shields: Conform to table below for minimum length of shield:

PIPE SIZE INSULATION THICKNESS LENGTH OF SHIELD

Less than 1” Up to 1” 3”

1” – 2” 1” 4 1/2”

1” – 2” 1 1/2” 5 1/2”

2 1/2” – 4” 1” 6 1/2”

2 1/2” – 4” 1 1/2” 7 1/2”

2 1/2” – 4” 2” 8 1/2”

2 1/2” – 4” 2 1/2” 9 1/2”

5” and Larger 1” 13”

5” and Larger 1 1/2” 14”

5” and Larger 2” 15”

5” and Larger 2 1/2” 16”

5” and Larger 3” and Larger 18”

K. Pipe Hanger, Trapeze, and Roller Support Insulation Inserts: Butt pipe insulation against pipe hanger insulation inserts. Apply wet coat of vapor barrier lap cement on butt joints and seal joints with 3-inch wide vapor barrier tape or band.

3.2 INSTALLATION OF EQUIPMENT INSULATION

A. General: Install equipment thermal insulation products in accordance with manufacturer's written instructions, and in compliance with the MICA National Commercial and Industrial Insulation Standards to ensure that insulation services intended purpose.

B. Install insulation materials with smooth and even surfaces and on clean and dry surfaces. Redo poorly fitted joints. Do not use mastic or joint sealer as filler for gapping joints and excessive voids resulting from poor workmanship.

C. Maintain integrity of vapor-barrier on equipment insulation and protect it to prevent puncture and other

D. Do not apply insulation to hot equipment.

E. Apply insulation using the staggered joint method for both single and double layer construction, where feasible. Apply each layer of insulation separately.

F. Coat insulated surfaces with layer of insulating cement, troweled in workmanlike manner, leaving smooth continuous surface. Fill in scored block, seams, chipped edges and depressions, and cover over wire netting and joints with cement of sufficient thickness to remove surface irregularities.

(092036) 23 07 00-5 (Repair AHU O-Club, B462)

G. Cover insulated surfaces with glass cloth jacketing neatly fitted and firmly secured. Lap seams at least two inches. Apply over vapor barrier where applicable.

H. Do not insulate boiler manholes, handholes, cleanouts, ASME stamp, and manufacturer's nameplate.

Provide neatly beveled edge at interruptions of insulation.

I. Provide removable insulation sections to cover parts of equipment which must be opened periodically for maintenance; include metal vessel covers, fasteners, flanges, frames and accessories.

J. Remove equipment nameplate and re-install on exterior insulation surface or provide duplicate nameplate for field installation on exterior insulation surface.

3.3 INSTALLATION OF DUCTWORK INSULATION

A. General: Install insulation products in accordance with manufacturer's written instructions, and in accordance with the MICA National Commercial and Industrial Insulation Standards to ensure that insulation serves its intended purpose.

B. Install insulation materials with smooth and even surfaces.

C. Clean and dry ductwork prior to insulating. Butt insulation joints firmly together to ensure complete and tight fit over surfaces to be covered.

D. Maintain integrity of vapor-barrier on ductwork insulation, and protect it to prevent puncture and other

E. Extend ductwork insulation without interruption through walls, floors and similar ductwork penetrations, except where otherwise indicated.

F. Lined Ductwork: Except as otherwise indicated, omit insulation on ductwork where internal insulation or sound absorbing linings have been installed.

G. Corner Angles: Except for oven and hood exhaust duct insulation, install corner angles on external corners of insulation on ductwork in exposed finished spaces before covering with jacketing.

H. Flexible Duct Connections: Install insulation materials on flexible duct connections wherever ductwork connects to vibration isolated equipment. Provide adequate flexibility to allow for thermal, axial, transverse, and torsional movement, and also capable of absorbing vibrations of connected equipment.

3.4 PROTECTION AND REPLACEMENT

A. Replace damaged insulation which cannot be repaired satisfactorily, including units with vapor barrier damage and moisture saturated units.

B. Protection: Insulation installer shall advise Contractor of required protection for insulation work during remainder of construction period, to avoid damage and deterioration.

END OF SECTION