DESIGN A/E NOTE - GUIDE SPECIFICATION CONVENTIONS

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Rev 19JUN09 j:\Projects\Active\com-deca_design_criteria_revisions-04071\Guide Specifications\TJG Innformation

SECTION 15260

PIPING INSULATION FOR HVAC AND PLUMBING

PART 1 - GENERAL

1.1SUMMARY

1.1.1.Section Includes:

  1. Piping insulation.
  2. Jackets and accessories.

1.1.2.Related Sections:

  1. Section 01042 - Mechanical, Refrigeration, Food Service Equipment and Electrical Coordination.
  2. Section 01400 - Quality Control.
  3. Section 01720 – [Phased Turnover and] Contract Closeout.
  4. Section 15190 Mechanical Identification.
  5. Section 15410 - Plumbing Piping - Placement of Hangers.
  6. [Section 15535 – Refrigeration Piping and Specialties for HVAC]
  7. [Section 15510 – Hydronic Piping]

1.2PERFORMANCE REQUIREMENTS

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  1. Materials: Flame spread/smoke developed rating of 25/50 or less in accordance with NFPA 255, and UL 723.
  2. All materials and insulating values shall comply with the International Energy Conservation Code.

1.3QUALITY CONTROL

1.3.1.The following publications form a part of this specification to the extent they are applicable:

  1. Section 01400 – Quality Control.
  2. ASTM C534 Preformed Flexible Elastomeric Cellular Thermal Insulation in Sheet and Tubular Form.
  3. ASTM E96 Water Vapor Transmission of Materials.
  4. NFPA 255 Surface Burning Characteristics of Building Materials.
  5. UL 723 Surface Burning Characteristics of Building Materials.
  6. ASTM C177 - Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded Hot Plate Apparatus.
  7. ASTM C195 - Standard Specification for Mineral Fiber Thermal Insulating Cement.
  8. ASTM C449/C449M - Standard Specification for Mineral Fiber Hydraulic-Setting Thermal Insulating and Finishing Cement.
  9. ASTM C518 - Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus.
  10. ASTM C533 - Standard Specification for Calcium Silicate Block and Pipe Thermal Insulation.
  11. ASTM C534 - Standard Specification for Preformed Flexible Elastomeric Cellular Thermal Insulation in Sheet and Tubular Form.
  12. ASTM C547 - Standard Specification for Mineral Fiber Preformed Pipe Insulation.
  13. ASTM C552 - Standard Specification for Cellular Glass Thermal Insulation.
  14. ASTM C578 - Standard Specification for Preformed, Cellular Polystyrene Thermal Insulation.
  15. ASTM C591 - Standard Specification for Unfaced Preformed Rigid Cellular Polyurethane Thermal Insulation.
  16. ASTM C610 - Standard Specification for Expanded Perlite Block and Pipe Thermal Insulation.
  17. ASTM C795 - Standard Specification for Thermal Insulation for Use in Contact with Austenitic Stainless Steel.
  18. ASTM C921 - Standard Practice for Determining the Properties of Jacketing Materials for Thermal Insulation.
  19. ASTM D1056 - Standard Specification for Flexible Cellular Materials - Sponge or Expanded Rubber.
  20. ASTM D1667 - Standard Specification for Flexible Cellular Materials--Vinyl Chloride Polymers and Copolymers (Closed-Cell Foam).
  21. ASTM D1784 - Standard Specification for Rigid Poly(Vinyl Chloride) (PVC) Compounds and Chlorinated Poly(Vinyl Chloride) (CPVC) Compounds.
  22. ASTM D2842 - Standard Test Method for Water Absorption of Rigid Cellular Plastics.
  23. ASTM E84 - Standard Test Method for Surface Burning Characteristics of Building Materials.
  24. ASTM E96 - Standard Test Methods for Water Vapor Transmission of Materials.
  25. NAIMA National Insulation Standards.
  26. NFPA 255 - Standard Method of Test of Surface Burning Characteristics of Building Materials.
  27. UL 723 - Standard for Test for Surface Burning Characteristics of Building Materials.

1.4SUBMITTALS

1.4.1.Submittals for review:

  1. Submit under provisions of Section 01400.
  2. Product Data: Provide product description, list of materials and thickness for each service, and locations.
  3. Operation and Maintenance Data.

1.5DELIVERY, STORAGE, AND HANDLING

  1. Section 01560 – Environmental Protection.
  2. Deliver materials to site in original factory packaging, labeled with manufacturer's identification, including product density and thickness.
  3. Store insulation in original wrapping and protect from weather and construction traffic.
  4. Protect insulation against dirt, water, chemical, and mechanical damage.
  5. Maintain ambient temperatures and conditions required by manufacturers of adhesives, mastics, and insulation cements.
  6. Maintain temperature during and after installation for minimum period of 24 hours.

1.6QUALIFICATIONS

  1. Applicator: Company specializing in performing the work of this section with minimum three years experience.

PART 2 - PRODUCTS

2.1GLASS FIBER

2.1.1.Insulation:

  1. ASTM C547; rigid molded, noncombustible.
  2. 'K' value: ASTM C177, 0.24 at 75 degrees F.
  3. Maximum service temperature: 850 degrees F.

2.1.2.Vapor Barrier Jacket:

  1. ASTM C921, White kraft paper with glass fiber yarn, bonded to aluminized film.
  2. Moisture vapor transmission: ASTM E96; 0.02 perm-inches.

2.1.3.Tie Wire:

  1. 0.048 inch stainless steel with twisted ends on maximum 12 inch centers.

2.1.4.Vapor Barrier Lap Adhesive:

  1. Compatible with insulation.

2.1.5.Fibrous Glass Fabric:

  1. Cloth: Untreated; 9 oz/sq yd weight.
  2. Blanket: 1.0 lb/cu ft density.

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2.2JACKETS

2.2.1.PVC Plastic.

  1. Jacket: ASTM D1784, One piece molded type fitting covers and sheet material, off-white color.

(1)Minimum service temperature: 0 degrees F.

(2)Maximum service temperature: 150 degrees F.

(3)Moisture vapor transmission: ASTM E96; 0.002 perm-inches.

(4)Thickness: 10 mil.

(5)Connections: Brush on welding adhesive or Pressure sensitive color matching vinyl tape.

2.3CELLULAR FOAM

  1. Insulation: ASTM C534; flexible, cellular elastomeric, molded or sheet.

(1)'K' ('ksi') Value: ASTM C177 or C518; 0.27 at 75 degrees F (0.04 at 24 degrees C).

(2)Minimum Service Temperature: 40 degrees F (40 degrees C).

(3)Maximum Service Temperature: 220 degrees F (104 degrees C).

(4)Maximum Moisture Absorption: ASTM D1056; 1.0 percent (pipe) by volume, 1.0 percent (sheet) by volume.

(5)Moisture Vapor Transmission: ASTM E96; 0.20 perm inches.

(6)Maximum Flame Spread: ASTM E84; 25.

(7)Maximum Smoke Developed: ASTM E84; 50.

(8)Connection: Waterproof vapor barrier adhesive.

  1. Elastomeric Foam Adhesive

(1)Air dried, contact adhesive, compatible with insulation.

***FOR AREAS OF EXTREME HUMIDITY***

2.4WICKING PIPE INSULATION

  1. Insulation: ASTM C547 and ASTM C795; rigid molded, noncombustible.

(1)‘K’ (‘Ksi’) value: ASTM C177, 0.24 at 75 degrees F (0.035 at 24 degrees C).

(2)Service temperature: 35 to 70ºF pipe temperature.

(3)Maximum moisture absorption: 0.2 percent by volume.

(4)Flame spread/smoke developed – 25/50.

(5)Wicking material lining core and extending to the surface of the pipe facing.

  1. Jacket:

(1)White all serviceable jacket with evaporation holes, cap seal joints and butt strips, no staples.

(2)Permeance – 0.4 perms maximum.

  1. Premolded Fittings:

(1)Insulation shall be “Permawick” by Knauf or equal.

2.5JACKET FOR EXTERIOR PIPE INSULATION

  1. Fiberglass insulation installed outdoors and subject to water damage shall be provided with an additional 0.5 mm (0.016”) aluminum jacket with lock seam longitudinal joint and stainless steel “Bandit” straps for butted joints as required for a water-tight installation.

PART 3 - EXECUTION

3.1EXAMINATION

  1. Verify that piping has been tested before applying insulation materials.
  2. Verify that surfaces are clean, foreign material removed, and dry.

3.2INSTALLATION

3.2.1.General:

  1. Install materials in accordance with manufacturer's instructions.
  2. On exposed piping, locate insulation and cover seams in least visible locations.
  3. Finish insulation at supports, protrusions, and interruptions.
  4. For exterior applications, finish insulation with two coats of ultraviolet resistant finish as recommended by the manufacturer.
  5. Continue insulation through walls, sleeves, pipe hangers, and other pipe penetrations.
  6. Insulate entire system including fittings, valves, unions, flanges, strainers, flexible connections, pump bodies, and expansion joints.
  7. Finish at supports, protrusions, and interruptions.
  8. Pipe Exposed in Mechanical Equipment Rooms or Finished Spaces less than 10 feet above finished floor: Finish with [canvas jacket sized for finish painting] [PVC jacket and fitting covers] [ABS jacket and fitting covers] [aluminum jacket] [stainless steel jacket].
  9. Install aluminum jacket on piping out of doors.

3.2.2.Installation: Glass fiber insulated pipes conveying fluids below ambient temperature:

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  1. Provide vapor barrier jackets, factory-applied or field-applied. Secure with self-sealing longitudinal laps and butt strips with pressure sensitive adhesive. Secure with outward clinch expanding staples and vapor barrier mastic.
  2. Insulate fittings, joints, and valves with molded insulation of like material and thickness as adjacent pipe. Finish with glass cloth and vapor barrier adhesive or PVC fitting covers.

3.2.3.Installation: Hot piping conveying fluids 140 degrees F or less, insulate flanges and unions at equipment completely. Bevel and seal ends of insulation.

  1. For hot piping conveying fluids over 140 degrees F, insulate flanges and unions at equipment.
  2. Glass fiber insulated pipes conveying fluids above ambient temperature:

(1)Provide standard jackets, with or without vapor barrier, factory-applied or field-applied. Secure with self-sealing longitudinal laps and butt strips with pressure sensitive adhesive. Secure with outward clinch expanding staples.

(2)Insulate fittings, joints, and valves with insulation of like material and thickness as adjoining pipe. Finish with glass cloth and adhesive or PVC fitting covers.

3.2.4.Cellular foam insulation:

  1. All longitudinal and butt joints shall be fully glued and sealed.

3.2.5.Installation: Wicking pipe insulation:

  1. Install in accordance with NAIMA National Insulation Standards and Knauf installation instructions.
  2. Where insulation is indicated to be replaced, remove existing insulation. Allow piping to warm to above the dew point and to dry thoroughly before applying new insulation. Coordinate with the Commissary Officer to schedule work for times when the Commissary is closed.
  3. Insulate fittings, joints, and valves with insulation of like material and thickness as adjoining pipe. Finish with PVC fitting covers. Install wicking material as directed by manufacturer.
  4. Continue insulation through walls, sleeves, pipe hangers, and other pipe penetrations. Finish at supports, protrusions, and interruptions. At fire separations, refer to Section 07270.
  5. Install jacket with evaporation holes aligned with wicking material at the bottom of the pipe.

3.2.6.Inserts and Shields:

  1. Application: Piping 2 diameter or larger.

(1)Shields: Galvanized steel between pipe hangers or pipe hanger rolls and inserts.

(2)Insert location: Between support shield and piping and under the finish jacket.

(3)Insert configuration: Minimum 6 inches long, of same thickness and contour as adjoining insulation; may be factory fabricated.

(4)Insert material: Hydrous calcium silicate insulation or other heavy density insulating material suitable for the planned temperature range.

3.3TOLERANCE

  1. Substituted insulation materials shall provide thermal resistance within 10 percent at normal conditions, as materials indicated.

3.4CELLULAR FOAM INSULATION SCHEDULE

PIPING SYSTEMSPIPE SIZE THICKNESS

InchInch

  1. Air Conditioning Refrigeration Piping

Above 40 degrees F (5 degrees C)To 2 ¾“

Larger1”

Below 40 degrees F (5 degrees C) To 1 1”

Larger1.5”

Condensate Inside BuildingsAll ¾”

  1. Plumbing Piping

Domestic Hot Water, HotOver 2"1.5"

Recirculated, Over 1”1.0”

1” and Less½”

Domestic Cold water2” and larger1”

Under 2”½”

Roof drainsAll½”

  1. [Hydronic Heating Piping]

Below 140 degrees F4” and up1.0” 1-1/2” to 3” 0.75 “

1-1/4” and less0.5”

Above 140ºF, below 200ºF4” and larger1.5”

Under 4”1.0”

3.5GLASS FIBER INSULATION SCHEDULE

  1. Roof drain bodies, horizontal downspouts above

grade, and vertical downspouts from drains to

horizontal downspoutsAll 1

3.6GLASS FIBER INSULATION SCHEDULE

PIPING SYSTEMSPIPE SIZE THICKNESS

Inch (mm)Inch (mm)

  1. Heating system

Heating Water Supply and Return4” and larger1.5”

Under 4”1.0”

3.7EXTERIOR PIPE INSULATION

Insulation installed outdoors shall be provided with an additional 0.5 mm (0.016”) aluminum jacket with lock seam longitudinal joint and stainless steel “Bandit” straps for butted joints as required for a water-tight installation.

3.8PRODUCT REFRIGERATION SYSTEM

  1. See Section 15651.

3.9SCHEDULES – WICKING PIPE INSULATION

  1. Cooling Systems: Chilled water

(1)1 ½” diameter and less1’ thickness

(2)2” diameter and larger1.5” thickness

END OF SECTION

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