Designation: C 1071 00

Standard Specication for

Fibrous Glass Duct Lining Insulation (Thermal and Sound
Absorbing Material)
1
This standard is issued under the xed designation C 1071; 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.
1. Scope
1.1 This specication covers brous glass insulation used as
a thermal and sound absorbing liner for interior surfaces of
ducts, plenums, and other air handling equipment that handle
air up to 250F (121C).
1.2 The values stated in inch-pound units are the standard.
The SI values in parentheses are for information only.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
C 167 Test Methods for Thickness and Density of Blanket
or Batt Thermal Insulations
2
C 168 Terminology Relating to Thermal Insulating Materi-
als
2
C 177 Test Method for Steady-State Heat Flux Measure-
ments and Thermal Transmission Properties by Means of
the Guarded-Hot-Plate Apparatus
2
C 390 Criteria for Sampling and Acceptance of Preformed
Thermal Insulation Lots
2
C 411 Test Method for Hot-Surface Performance of High-
Temperature Thermal Insulation
2
C 423 Test Method for Sound Absorption and Sound Ab-
sorption Coefficients by the Reverberation Room Method
2
C 518 Test Method for Steady-State Heat Flux Measure-
ments and Thermal Transmission Properties by Means of
the Heat Flow Meter Apparatus
2
C 665 Specication for Mineral-Fiber Blanket Thermal In-
sulation for Light Frame Construction and Manufactured
Housing
2
C 1104/C 1104M Test Method for Determining the Water
Vapor Sorption of Unfaced Mineral Fiber Insulation
2
C 1114 Test Method for Steady-State Thermal Transmission
Properties by Means of the Thin-Heater Apparatus
2
C 1304 Test Method for Assessing the Odor Emission of
Thermal Insulation Materials
2
C 1338 Test Method for Determining Fungi Resistance of
Insulation Materials and Facings
2
E 84 Test Method for Surface Burning Characteristics of
Building Materials
3
E 795 Practices for Mounting Test Specimens During
Sound Absorption Tests
2
G 21 Practice for Determining Resistance of Synthetic
Polymer Materials to Fungi
4
G 22 Practice for Determining Resistance of Plastics to
Bacteria
4
2.2 Other Standards:
NAIMA Fibrous Glass Duct Liner Standard
5
SMACNA HVAC Duct Construction Standards
6
UL 723 Test for Surface Burning Characteristics of Building
Materials
7
NFPA 255 Standard Method of Test of Surface Burning
Characteristics of Building Materials
8
NFPA 259 Standard Test Method for Potential Heat of
Building Materials
8
CAN/ULC-S102-M88 Standard Method of Test for Surface
Burning Characteristics of Building Materials and Assem-
blies
9
3. Terminology
3.1 For denitions of terms used in this specication, see
Terminology C 168.
4. Classication
4.1 The insulation covered by this specication shall be of
the following types:
4.1.1 Type IBlanket in roll form up to 200 ft (61 m) in
length, 36 to 72 in. (914 to 1829 mm) in width, and thicknesses
1
This specication is under the jurisdiction of ASTM Committee C16 on
Thermal Insulation and is the direct responsibility of Subcommittee C16.23 on
Blanket and Loose Fill Insulation.
Current edition approved Dec. 10, 2000. Published January 2001. Originally
published as C 1071 86. Last previous edition C 1071 98.
2
Annual Book of ASTM Standards, Vol 04.06.
3
Annual Book of ASTM Standards, Vol 04.07.
4
Annual Book of ASTM Standards, Vol 14.04.
5
Available from North American Insulation Manufacturers Association, 44
Canal Center Plaza, Suite 310, Alexandria, VA 22314.
6
Available from Sheet Metal and Air Conditioning Contractors National
Association, Inc., 4201 Lafayette Center Drive, Chantilly, VA 22021-1209.
7
Available from Underwriters Laboratories Inc., 333 Pngsten Road, North-
brook, Illinois 600622096.
8
Available from National Fire Protection Association, 1 Batterymarch Park, PO
Box 9101, Quincy, MA 022699101.
9
Available from Underwriters Laboratories of Canada, 7 Crouse Road, Scarbor-
ough, Ontario, Canada M1R 3A9.
1
Copyright ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
of
1
2to 3 in. (13 to 76 mm), in
1
2-in. (13-mm) increments.
4.1.2 Type IIBoard in sheet form, up to 120 in. (3048 mm)
in length, up to 48 in. (1219 mm) in width, and thicknesses of
1
2to 3 in. (13 to 76 mm) in
1
2-in. (13-mm) increments.
5. Ordering Information
5.1 Purchasers should select the preferred options permitted
herein and include the following information in procurement
documents:
5.1.1 Title, designation, and year of this specication.
5.1.2 Type of insulation (see 4.1).
5.1.3 Length, width, and thickness required (see 4.1).
5.1.4 Packaging required (see 16.1).
5.1.5 Marking required (see 16.2 and 16.3).
5.1.6 Material weight should be obtained from supplier.
6. Materials and Manufacture
6.1 Basic Material The basic material shall be made from
glass processed from the molten state into brous form with a
binder added to form dimensionally stable insulation. Asbestos
shall not be used as an ingredient or component part of the
product.
6.2 Air Stream SurfaceDepending on the insulation sur-
face characteristics and service air velocity, the air stream
surface may be plain or coated with a temperature resistant
coating or faced with a plain or coated brous mat or fabric.
7. Physical Requirements
7.1 Corrosiveness When tested in accordance with 12.3,
the metal plate in contact with the back side (non-air surface
side) of the insulation shall show no corrosion greater than the
comparative plates in contact with sterile cotton which has
been tested in the same manner.
7.2 Water Vapor SorptionWhen tested in accordance with
12.4, the water vapor sorption of the insulation shall not be
more than 3 % by weight.
7.3 Fungi Resistance When tested in accordance with
12.5, the insulation shall be observed as having no fungal
growth.
7.4 Temperature ResistanceWhen tested in accordance
with 12.6, the air stream surface shall have no evidence of
aming, glowing, smoldering, visible smoke, or delamination,
cracking, deformation or reduction in thickness.
7.5 Erosion ResistanceWhen tested in accordance with
12.7, the insulation shall not break away, crack, peel, ake off,
or show evidence of delamination or continued erosion when
air is passed through typical duct sections at a velocity
specied in 12.7.
7.6 Odor Emission When tested in accordance with 12.8,
a detectable odor of objectionable nature recorded by more
than two of the ve panel members shall constitute failure of
the material.
7.7 Surface Burning CharacteristicsWhen tested in ac-
cordance with 12.9, the air stream surface of the insulation
shall have a maximum ame spread index of 25 and a
maximum smoke developed index of 50.
7.8 Apparent Thermal ConductivityWhen tested in accor-
dance with 12.10, the apparent thermal conductivity (k) of the
insulation, expressed as Btuin/hft
2
F or W/mK for the
specied thickness shall not exceed the values shown in Table
1.
7.9 Sound Absorption CoeffcientsWhen tested in accor-
dance with 12.11, the insulation shall have sound absorption
coefficients not less than that in Table 2 at the specied
frequencies.
7.10 Bacteria ResistanceWhen tested in accordance with
12.12, the insulation shall be observed as having no growth.
7.11 Combustion CharacteristicsWhen tested in accor-
dance with 12.13, the material shall have a potential heat value
not exceeding 3500 Btu/lb (8141 kJ/kg).
8. Dimensional Tolerances
8.1 After conditioning for a minimum of 24 h at 706 3F
(21 6 1.6C) and 50 6 5 % relative humidity, the insulation
shall conform to the dimensional tolerances listed in Table 3.
9. Workmanship, Finish, and Appearance
9.1 The insulation units shall indicate good workmanship in
fabrication and shall not have visible defects which adversely
affect their service qualities.
10. Sampling
10.1 The insulation shall be sampled in accordance with
Criteria C 390. Specic provisions for sampling shall be agreed
upon between the purchaser and supplier as part of the
purchase contract.
11. Qualication Requirements
11.1 The following requirements shall be employed for the
purpose of initial material or product qualication:
11.1.1 Corrosiveness,
11.1.2 Water vapor sorption,
11.1.3 Fungi resistance,
11.1.4 Temperature resistance,
11.1.5 Erosion resistance,
11.1.6 Odor emission,
11.1.7 Surface burning characteristics,
11.1.8 Apparent thermal conductivity,
11.1.9 Sound absorption coefficients,
11.1.10 Bacteria resistance, and
11.1.11 Combustion characteristics.
11.2 The manufacturer shall furnish a certicate of compli-
ance for qualication requirements upon request (see Criteria C
390).
12. Test Methods
12.1 Conduct tests for temperature resistance, erosion resis-
tance, surface burning characteristics, and sound absorption on
the air stream surface side.
12.2 DimensionsThe thickness shall be measured in ac-
cordance with Test Methods C 167. Length and width shall be
measured with a steel tape or ruler to 6
1
16 in. (62 mm).
TABLE 1 Apparent Thermal Conductivity (maximum),
Btuin/hft
2
F (W/mK)
Mean
Temperature,
F (C)
Type I Type II
75 (24) 0.31 (0.045) 0.27 (0.039)
C 1071
2
12.3 Corrosiveness The corrosiveness shall be tested in
accordance with the method for testing the corrosiveness of
mineral ber batt and blanket insulation in Specication C 665.
12.4 Water Vapor SorptionThe water vapor sorption shall
be determined in accordance with Test Method C 1104/
C 1104M.
12.5 Fungi Resistance The fungi resistance shall be
determined in accordance with Test Method C 1338 and
Standard Practice G 21.
12.6 Temperature ResistanceThe temperature resistance
shall be determined in accordance with Test Method C 411,
with the air stream surface exposed to 250F (121C). Test at
the maximum thickness supplied.
12.7 Erosion Resistance Test:
12.7.1 ScopeThis method covers the evaluation of brous
glass duct lining insulation for damage and progressive erosion
due to contact with a moving air stream.
12.7.2 Signicance and UseThis method provides a rela-
tively simple and short term evaluation of in-use performance
utilizing a multiplier (safety factor) of at least 2.56 5 % times
the rated maximum velocity of the material to account for
variations in installation and for long term effects.
12.7.2.1 Initial blow-out of construction debris is speci-
cally excluded from the evaluation.
12.7.3 ProcedureFor material intended for rectangular
duct, install a sample of 1-in. (25-mm) thick insulation in a 12
by 12-in. (305 by 305-mm) sheet metal duct in an L-shaped
assembly. For material intended for circular duct, install a
sample of 1-in. (25-mm) thick insulation in a 14-in. (356-mm)
diameter metal duct in an L-shaped assembly. The length of the
upstream and downstream legs of the assembly shall be
between 6 and 9 ft (1.8 m and 2.7 m). The 90 bend shall be
made with an elbow as employed for installation. Because the
installation details will affect the test results, the installation
shall be in accordance with the NAIMA Fibrous Glass Duct
Liner Standard or SMACNA HVAC Duct Construction Stan-
dards. Connect the assembly to a fan by means of a transfor-
mation piece to provide for uniform air entry to the test
specimen. The fan must be able to generate the required test
velocities.
12.7.3.1 The air velocity for purposes of the test is to be
measured by a pitot tube and draft gage, or direct reading
velometer, positioned in the center of the outlet end of the
sample. Room air handled by the fan ranging in temperature
between 40F (4C) and 100F (38C), may be employed.
12.7.3.2 The inlet of the fan used for the test shall be
covered with a double layer of cheesecloth (14 to 15 square
yards per pound (26 to 28 m
2
/kg) and known to the trade as
count of 32 by 24).
12.7.3.3 A damper, if employed for regulating velocity in
the duct system, is to be located ahead of the test section.
12.7.3.4 For a collecting screen, use a double layer of
cheesecloth (the same type of cheesecloth as specied for the
fan inlet) stretched taut on a frame sized to provide for an area
not less than ve times the inside cross-sectional area of the
test section.
12.7.3.5 The test sample should not be exposed to a relative
humidity greater than 70 % for 24 h prior to the test.
12.7.3.6 The air velocity for the test is dependent upon the
use of the product. For this procedure the test velocity depends
on the manufacturers rated velocity for the product. The test
air velocity is 2.5 6 5 % times the product rated maximum use
velocity.
12.7.3.7 Before installing the collecting screen, pass air
through the lined test section at the test velocity for 1 h.
12.7.3.8 Then install the collecting screen 12 in. (305 mm)
from the outlet end of the test section.
12.7.3.9 The test then is to proceed at test velocity and to
continue for a period of 4 h. Examine the collecting screen for
macroscopic particles at the end of each hour during the test
period by taping the screen with the adhesive side of transpar-
ent tape, or tapes, in order to remove and record any eroded
particles. At the end of the test period, there is to be no
evidence of continued erosion, and interior surfaces of the
sample are not to show evidence of cracking, aking, peeling,
or delamination. For the purpose of this requirement, continued
erosion is considered to be either a constant or increasing rate
of erosion.
12.7.4 Precision and BiasNo information is presented
about either the precision or bias of this method for measuring
erosion resistance since the test result is nonquantitative.
12.8 Odor Emission The odor emission shall be deter-
mined in accordance with Test Method C 1304.
12.9 Surface Burning CharacteristicsThe surface burning
characteristics shall be determined in accordance with Test
Method E 84, UL 723, or NFPA 255. For Canada, the surface
burning characteristics shall be determined in accordance with
Test Method CAN/ULC-S102-M88.
12.10 Apparent Thermal ConductivityThe apparent ther-
mal conductivity shall be determined in accordance with Test
Method C 177, Test Method C 518, or Test Method C 1114 at
75F (24C) mean temperature and with a minimum tempera-
ture difference of 40F (22C). If Test Method C 518 is used
TABLE 2 Sound Absorption Coefficients (min) Using a Type A
Mounting
NOTE 1This data is based on round-robin tests. Data on Type A
mounting is for comparison only and is not meant to indicate character-
istics in duct service.
Thick-
ness,
in. (mm)
Frequency, Hz
NRC
A
125 250 500 1000 2000 4000
Type I
1
2 (13) 0.02 0.07 0.18 0.37 0.52 0.67 0.30
1 (25) 0.04 0.19 0.35 0.55 0.69 0.72 0.45
1
1
2 (38) 0.08 0.31 0.58 0.75 0.82 0.81 0.60
2 (51) 0.16 0.42 0.76 0.85 0.85 0.83 0.70
Type II 1 (25) 0.02 0.20 0.52 0.72 0.82 0.84 0.55
1
1
2 (38) 0.05 0.40 0.77 0.88 0.88 0.86 0.75
2 (51) 0.12 0.57 0.90 0.95 0.95 0.92 0.85
A
Noise Reduction Coefficient.
TABLE 3 Dimensional Tolerance, in. (mm)
Length Width Thickness
Type I 0, + 2 % 0, +
1
4(0, +6) 6
1
8 (63)
of length
Type II
1
8, +
3
8 6
1
8 (63) 6
1
8 (63)
(3, +10)
C 1071
3
the manufacturer shall certify that recent calibrations have been
made.
12.11 Sound Absorption CoeffcientsThe sound absorp-
tion coefficients shall be determined in accordance with Test
Method C 423, with a type A mounting as specied in
Practice E 795.
12.12 Bacteria ResistanceThe bacteria resistance shall be
determined in accordance with Standard Practice G 22.
12.13 Combustion CharacteristicsThe materials potential
heat value shall be determined in accordance with NFPA 259.
13. Inspection
13.1 The following requirements shall be employed for the
purpose of acceptance sampling of lots or shipment of qualied
materials:
13.1.1 Dimensions,
13.1.2 Workmanship,
13.1.3 Packaging, and
13.1.4 Marking.
13.2 Inspection of the materials shall be made as agreed
upon between the purchaser and the supplier as part of the
purchase contract.
14. Rejection and Rehearing
14.1 Material that fails to conform to the requirements of
the agreed upon specication may be rejected. Rejection
should be reported to the producer or supplier promptly and in
writing.
14.2 Upon the request of the purchaser in the contract or
order the certication of an independent third party indicating
conformance to the requirements of this specication may be
accepted instead of the manufacturers certication.
15. Certication
15.1 When specied in the purchase order or contract, a
producers or suppliers certication shall be furnished to the
purchaser that the material was manufactured, sampled, tested,
and inspected in accordance with this specication and has
been found to meet the requirements. When specied in the
purchase order or contract, a report of the test result shall be
furnished. (Refer to Criteria C 390 certication.)
16. Packaging and Package Marking
16.1 PackagingUnless otherwise specied, the insulation
shall be packed in the manufacturers standard commercial
container. The insulation shall be packed to insure carrier
acceptance and safe delivery at destination in containers
complying with the rules and regulations applicable to the
mode of transportation.
16.2 Container MarkingUnless otherwise specied, each
container shall be plainly marked with the suppliers name,
type, dimensions, and quantity.
16.3 Material Marking As a minimum, the face of the
liner shall be marked with the following: type, thickness, and
manufacturer.
17. Keywords
17.1 duct; duct lining; brous glass; plenum; sound absorb-
ing insulation; thermal insulation
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C 1071
4