ASTM E773-97
(Test Method)Standard Test Method for Accelerated Weathering of Sealed Insulating Glass Units
Standard Test Method for Accelerated Weathering of Sealed Insulating Glass Units
SCOPE
1.1 This test method covers procedures for testing the performance of preassembled permanently sealed insulating glass units against accelerated weathering.
1.2 This test method is applicable only to sealed insulating glass units, with one or two airspaces, fabricated for vision glass areas for use in buildings, such as sliding doors, windows, wall systems, and picture windows.
1.3 The unit construction used in this test method contains dimensions that are an essential component of the test. Deviations of glass or airspace sizes, or both, will affect the test results.
1.4 This test method is not applicable to sealed insulating glass units that are constructed from exterior vision materials other than glass.
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.6 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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. A specific hazard statement is given in Note 2.
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: E 773 – 97 An American National Standard
Standard Test Method for
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Accelerated Weathering of Sealed Insulating Glass Units
This standard is issued under the fixed designation E 773; 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.
NOTE 1—The temperature as indicated by the temperature indicator of
1. Scope
frost point apparatus when constructed and used in accordance with test
1.1 This test method covers procedures for testing the
procedures described in Test Method E 546.
performance of preassembled permanently sealed insulating
3.1.2 frost point—the temperature (Note 1) below freezing
glass units against accelerated weathering.
point of water (0°C (32°F)) at which visible frost begins to
1.2 This test method is applicable only to sealed insulating
deposit on the interior glass surface of a sealed insulating glass
glass units, with one or two airspaces, fabricated for vision
unit.
glass areas for use in buildings, such as sliding doors, win-
dows, wall systems, and picture windows.
4. Significance and Use
1.3 The unit construction used in this test method contains
4.1 This test method is intended to provide a means for
dimensions that are an essential component of the test. Devia-
evaluating the durability of the sealing system of sealed
tions of glass or airspace sizes, or both, will affect the test
insulating glass units. A round-robin test has been conducted,
results.
and additional data are being collected. The suitability of these
1.4 This test method is not applicable to sealed insulating
test methods will be further evaluated as the analysis of test
glass units that are constructed from exterior vision materials
results is completed.
other than glass.
1.5 The values stated in SI units are to be regarded as the
5. Apparatus
standard. The values given in parentheses are for information
5.1 For High Humidity Testing:
only.
5.1.1 High-Humidity Test Chamber—A chamber of conve-
1.6 This standard does not purport to address all of the
nient dimensions capable of maintaining 60 6 3°C (140 6
safety concerns, if any, associated with its use. It is the
5°F) and 95 6 5 % relative humidity.
responsibility of the user of this standard to establish appro-
5.2 For Accelerated Weather Cycle Test:
priate safety and health practices and determine the applica-
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5.2.1 Accelerated Weather Cycle Test Apparatus —The ac-
bility of regulatory limitations prior to use. A specific hazard
celerated weather cycle test apparatus shall be essentially that
statement is given in Note 2.
shown in Figs. 1-3 to provide the cycle conditions and time
frame indicated in Section 8.
2. Referenced Documents
5.2.2 Ultraviolet Light Source:
2.1 ASTM Standards:
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C 1036 Specification for Flat Glass
NOTE 2—Warning: Ultraviolet light sources used in this test method
E 546 Test Method for Frost Point of Sealed Insulating are harmful, especially to the eyes. Appropriate protective measures must
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be observed.
Glass Units
E 774 Specification for the Classification of the Durability
5.2.2.1 The source shall consist of two fluorescent black
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5,6
of Sealed Insulating Glass Units
light lamps, Type F72T12BL/HO (Note 3), for each test
specimen located as shown in Fig. 3.
3. Terminology
5.2.2.2 Each lamp must be replaced when its ultraviolet
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3.1 Definitions of Terms Specific to This Standard:
light intensity falls below 10 kW/m when measured with a
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3.1.1 chemical dew point—the temperature (Note 1) at
long-wave ultraviolet meter in direct contact with the lamp.
which organic vapor or other chemical begins to condense on
the interior glass surface of a sealed insulating glass unit.
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The apparatus is a modification of the device developed by the Division of
Building Research of the National Research Council of Canada. The modifications
include two black light lamps for each test specimen. Construction details are
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This test method is under the jurisdiction of ASTM Committee E-6 on
available from SIGMA (Sealed Insulating Glass Manufacturer’s Association), 111
Performance of Buildings and is the direct responsibility of Subcommittee E06.22 E. Wacker Drive, Chicago, IL 60601.
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on Durability Performance of Building Constructions. The sole source of supply of the apparatus known to the committee at this time
Current edition approved June 10, 1997. Published August 1997. Originally is General Electric Co., Nela Park, Cleveland, OH 44112. If you are aware of
published as E 773 – 81. Last previous edition E 773 – 83 (1995). alternative suppliers, please provide this information to ASTM Headquarters. Your
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Annual Book of ASTM Standards, Vol 1
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