ASTM C916-85(1996)e1
(Specification)Standard Specification for Adhesives for Duct Thermal Insulation
Standard Specification for Adhesives for Duct Thermal Insulation
SCOPE
1.1 This specification covers minimum material requirements, and safety precautions in application, for adhesives to bond thermal insulation duct liner on the interior surfaces of sheet metal air conditioning ducts; and for coating exposed edges and joints of duct liner thermal insulation to minimize erosion of insulation fibers by air movement.
1.2 This standard does not purport to address all of the safetyconcerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements, see Sections 7 and 9.
General Information
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
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e1
Designation: C 916 – 85 (Reapproved 1996)
Standard Specification for
Adhesives for Duct Thermal Insulation
This standard is issued under the fixed designation C 916; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
e NOTE—Keywords were added editorially in October 1996.
1. Scope 3. Terminology
1.1 This specification covers minimum material require- 3.1 Definitions:
ments, and safety precautions in application, for adhesives to 3.1.1 threshold limit value (TLV)—the concentration in
bond thermal insulation duct liner on the interior surfaces of parts of vapor per million parts of air, by volume at 25°C and
sheet metal air conditioning ducts; and for coating exposed 101.3 kPa (1 atm) pressure. This value is an indication of the
edges and joints of duct liner thermal insulation to minimize relative inhalation toxicity hazard of vapors from volatile
erosion of insulation fibers by air movement. solvents used in adhesives. Data on TLV of materials are
1.2 This standard does not purport to address all of the published annually by ACGIH.
safety concerns, if any, associated with its use. It is the 3.1.2 For definitions of other terms on thermal insulating
responsibility of the user of this standard to establish appro- materials used in this specification, see Terminology C 168.
priate safety and health practices and determine the applica- 3.2 Definitions of Terms Specific to This Standard:
bility of regulatory limitations prior to use. For specific 3.2.1 flammable vehicle—in an adhesive, the liquid portion
precautionary statements, see Sections 7 and 9. having a flash point as determined by Test Methods D 93.
3.2.2 nonflammable vehicle—in an adhesive, the liquid
2. Referenced Documents
portion having no flash point as determined by Test Methods
2.1 ASTM Standards: D 93.
C 168 Terminology Relating to Thermal Insulating Materi-
4. Classification of Adhesives
als
D 93 Test Methods for Flash Point by Pensky-Martens 4.1 Adhesives supplied under this specification are classi-
Closed Cup Tester fied as follows:
D 903 Test Method for Peel or Stripping Strength of Adhe- 4.1.1 Type I—An adhesive in which the vehicle is nonflam-
sive Bonds mable in the liquid (wet) state and which will pass the
D 1151 Test Method for Effect of Moisture and Temperature edge-burning test of 6.2.
on Adhesive Bonds 4.1.2 Type II—An adhesive in which the vehicle is nonflam-
E 84 Test Method for Surface Burning Characteristics of mable in the liquid (wet) state and which will not pass the
Building Materials edge-burning test of 6.2.
2.2 Other Standards: 4.1.3 Type III—An adhesive in which the vehicle is flam-
NFPA No. 30, Flammable and Combustible Liquids Code mable in the liquid (wet) state and which will pass the
SMACNA Duct Liner Application Standard edge-burning test of 6.2.
ACGIH Threshold Limit Values 4.1.4 Type IV—An adhesive in which the vehicle is flam-
mable in the liquid (wet) state and which will not pass the
edge-burning test of 6.2.
This specification is under the jurisdiction of ASTM Committee C-16 on
Thermal Insulation and is the direct responsibility of Subcommittee C16.33 on
5. Ordering Information
Thermal Insulation Finishes and Thermal Transmission.
Current edition approved July 26, 1985. Published September 1985. Originally
5.1 Attention of the purchaser is directed to the fact that four
published as C 916 – 79. Last previous edition C 916 – 79.
types of adhesives are available under this specification. If the
Annual Book of ASTM Standards, Vol 04.06.
purchaser does not specify which type is desired, the supplier
Annual Book of ASTM Standards, Vol 05.01.
Annual Book of ASTM Standards, Vol 15.06.
shall furnish Type I only. Other purchaser options are described
Annual Book of ASTM Standards, Vol 04.07.
in 6.1.4 and 6.1.5.
National Fire Protection Assn., Batterymarch Park, Quincy, MA 02269.
Sheet Metal and Air Conditioning Contractors National Assn., 4201 Lafayette
6. Physical Requirements
Center Drive, Chantilly, VA 22021.
American Conference of Governmental Industrial Hygienists, 1330 Kemper
6.1 Requirements Applicable to All Types:
Meadow Dr., Cincinnati, OH 45240.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
C 916
6.1.1 Bonding Strength—The adhesive shall have a bonding machine shall be 2 in. (50 mm)/min.
strength of not less than 0.5 lb/in. (9.0 g/mm) of width after
7.3 Bonding Strength at High Humidity—Prepare the speci-
testing under each condition of room temperature, high humid-
mens as described in 7.1 except that after the 24-h conditioning
ity, and heating, as specified in 7.2, 7.3, and 7.4.
period specified, further condition the specimens by exposure
6.1.2 Bond Retention After Heat-Aging—Duct liner fiber
to a relative humidity of 95 % minimum at 73.4 6 2°F (23 6
shall remain bonded to at least 75 % of the total area of each
1°C) for 24 h. Conduct the testing as specified in Test
specimen after testing as specified in 7.5.
Method D903 immediately after removal of the test specimens
6.1.3 Flame Spread and Smoke Developed—Adhesive for
from the conditioning atmosphere and preferably under the
duct liner shall have a fire hazard classification not to exceed
same conditions. The rate of jaw separation of the testing
25 for flame spread and 50 for smoke developed. Classification
machine shall be 2 in. (50 mm)/min.
shall be determined by Test Method E 84. A report from a
7.4 Bonding Strength While Heated—Prepare the specimens
qualified testing laboratory to indicate that fire hazard classi-
as described in 7.1 except that after the 24-h conditioning
fication does not exceed that specified is acceptable. Tests shall
period specified, further condition the specimens for 7 days in
be conducted as stated in 7.6.
a circulating air oven maintained at a temperature of 158 6 2°F
6.1.4 Storage Stability—The adhesive shall meet the re-
(70 6 1°C). Conduct the testing as specified in Test Method
quirements specified herein after completion of storage for a
D 903 at a temperature of 158 6 2°F (706 1°C) at 2 in. (50
period of 6 months under the conditions specified in 7.8. If
mm)/min jaw separation speed.
acceptable to the purchaser, and instead of performing a
7.5 Bond Retention After Heat Aging—Prepare a flat piece
storage stability test on each shipment, the manufacturer shall
of 18-gage (0.05-in., 1.3-mm) galvanized steel 6 by 16 in. (150
provide evidence that previous commercial lots of the adhesive
by 400 mm) by cleaning with solvent and drying. Apply the
have met satisfactorily the 6 months storage stability require-
adhesive to one side by brushing or spraying in accordance
ment.
with the manufacturer’s recommendation for thickness. As
6.1.5 Other Physical Requirements—Other requirements
soon as the adhesive has become tacky, as determined by finger
may be mutually agreed upon between the purchaser and the
pressure, bond to it a single thickness of 1-in. (25-mm) thick by
seller. These requirements may include viscosity, bonding time,
6 by 16-in. (150 by 400-mm) duct liner insulation of 3-lb/ft
solids content, color, and odor.
(48-kg/m ) nominal density conforming to SMACNA Duct
6.2 Edge Burning Test for Types I and III Adhesives—In
Liner Application Standard. Immediately after bonding, use the
addition to the general requirements stated above, Types I and
hand roller on the duct liner as described in 7.2.2 to ensure
III adhesives shall meet the following requirement: When
uniform contact between adherends. Using a sheet metal break
tested by the method described in 7.7, there shall be no residual
or other suitable forming technique, after1hat room tempera-
flame or continuous burning of any specimen for more than 3
ture, bend the specimen to a rectangular tubular shape with the
s after the test flame is extinguished.
duct liner on the inside, thus forming a hollow duct 4 by 4 by
6 in. (100 by 100 by 150 mm). Prepare two such specimens.
7. Test Methods
Allow the formed specimens to age for 24 h at room tempera-
7.1 Significance and Use—The tests described herein are
ture. Using test exposure No. 11 of Test Method D 1151,
intended to evaluate the suitability of the adhesive for service
expose the specimens for 90 day
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