NOAA Standard Specification AMC-635-2 Thermal Insulation for Compartments.pdf
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- MO FY27 Thomas Jefferson Drydock REFERENCES and ATTACHMENTS Federal contract opportunity
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This is a Standard Specification for thermal insulation installation on NOAA ships, issued by the National Oceanic and Atmospheric Administration (NOAA) Atlantic Marine Center in October 1989.
The specification establishes requirements for removing, renewing, and installing thermal insulation on shell plating, bulkheads, overheads, and other structural components in NOAA ship compartments. All existing insulation must be removed and properly disposed of, with special compliance required for asbestos-containing materials per Section 4.11.7 of the referenced General Requirements for Ship Repair Contract Work. Required materials include fibrous glass faced thermal insulation board (MIL-I-742, Type I), fibrous glass tape (MIL-C-20079, Type II, Class 1), fibrous glass insulation felt (MIL-I-22023, Type I, Class 6), epoxy adhesive (MIL-A-24456), latex adhesive (MIL-A-3316, Class 1, Grade A), and vapor barrier coating compound (MIL-C-19993). Installation requirements specify 3/16-inch diameter studs with press-fit metal caps, with aluminum studs for aluminum surfaces and cadmium-plated steel studs for steel surfaces. Studs must be spaced approximately 12 inches apart (maximum 14 inches) on centers, with edge studs placed no more than 4 inches from board edges. Vertical insulation extends from 6 inches above deck to overhead with a metal buffer plate at the lower edge. All seams, joints, and edges must be covered with fibrous glass tape using latex adhesive. Insulation in laundries, sculleries, galleys, drying rooms, and on warm sides of refrigerated spaces requires a three-coat vapor barrier of alternating white and orange coating compound. Installation details for beams, frames, and stiffeners are provided in Appendix A.
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Text version
AMC-635-2
OCTOBER 1989
NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION (NOAA)
ATLANTIC MARINE CENTER
STANDARD SPECIFICATION AMC-635-2
THERMAL INSULATION FOR COMPARTMENTS
1. SCOPE. This specification contains the general requirements for renewing and installing thermal insulation on shell plating, bulkheads, overheads, and other structure in compartments of NOAA ships.
2. REFERENCES.
a. NOAA Standard Specification AMC-000-1 (latest revision), General Requirements for Ship Repair Contract Work on NOAA Ships"
3. REQUIREMENTS.
3.1 Whenever removal or renewal of existing insulation is
necessary to accomplish the required work, the contractor shall remove and properly dispose of all existing insulation. If the existing insulation contains asbestos materials, comply with Section 4.11.7 of reference 2.a. All suspect materials shall be considered to contain asbestos unless proven to be otherwise.
The contractor may have samples analyzed by a qualified laboratory to prove or disprove the presence of asbestos.
3.2 Materials.
3.2.1 Fibrous glass faced thermal insulation board, complying with MIL-I-742, Type I, shall be used.
3.2.2 Fibrous glass tape shall comply with MIL-C-20079, Type II, Class 1.
3.2.3 Fibrous glass insulation felt shall comply with MIL-I-
22023, Type I, Class 6.
3.2.4 Epoxy adhesive shall comply with MIL-A-24456.
3.2.5 Latex adhesive shall comply with MIL-A-3316, Class 1, Grade A.
3.2.6 Vapor barrier coating compound shall comply with MIL-C- 19993.
3.3 Installation.
3.3.1 Secure insulation board to the specified surfaces using 3/16-inch diameter studs and press-fit metal caps. Aluminum studs shall be used if the specified surface is aluminum and cadmium-plated steel studs shall be used on steel surfaces.
3.3.2 In areas accessible for a stud gun, weld studs shall be used. In areas that are inaccessible for a stud gun, studs welded to a perforated pad may be bonded to ship's structure using epoxy adhesive. A maximum of 25-percent of the total number of studs required to secure insulation on each plane area bounded by stiffeners or bulkheads may be attached using adhesive.
3.3.3 Studs shall be spaced approximately 12 inches (maximum of 14 inches) apart on centers. Studs at the edges of each piece of insulation board shall be placed not more than 4 inches from the edge at maximum intervals of 12 inches. Sufficient studs must be used to hold the insulation board firmly and evenly against the surface.
3.3.4 Insulation on vertical surfaces shall extend from 6 inches above the deck to the overhead. Do not apply insulation to the vertical surface within 6 inchess of the deck. Along the lower edge of the insulation, install a metal buffer plate tack-welded to the surface and extending out from surface a distance equal to the insulation thickness.
3.3.5 Insulation board shall be cut and neatly fitted around
surface protrusions.
3.3.6 Install insulation on beams, frames, and stiffeners as
shown on attached Appendix A.
3.3.7 Cover all seams, joints, and edges of thermal insulation with fibrous glass tape using latex adhesive.
3.3.8 To all insulation installed in laundries, sculleries, galleys, drying rooms, and to all insulation installed on the warm side of refrigerated stores spaces, apply a vapor barrier consisting of three alternate brush coatings of white, orange, and white vapor barrier coating compound.
APPENDIX A
INSULATION INSTALLATION ON BEAMS, FRAMES AND STIFFENERS
END OF SPECIFICATION
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