ASTM F495-99a(2004)

Standard Test Method for Weight Loss of Gasket Materials Upon Exposure to Elevated Temperatures

SIGNIFICANCE AND USE
Weight loss represents the amount of combustibles and volatiles of the material at various temperatures between 315°C (600°F) and 815°C (1499°F). This procedure should not be used to determine percent of binder content.
SCOPE
1.1 This test method covers the determination of gasket material weight loss upon exposure to elevated temperatures.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 This test method may include hazardous materials, operations, and equipment.
1.4 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.

General Information

• Status: Historical
• Publication Date: 31-Mar-2004
• Technical Committee: F03 - Gaskets
• Drafting Committee: F03.40 - Chemical Test Methods

Relations

• Replaces: ASTM F495-99a - Standard Test Method for Weight Loss of Gasket Materials Upon Exposure to Elevated Temperatures
• Effective Date: 01-Apr-2004
• Replaced By: ASTM F495-99a(2011) - Standard Test Method for Weight Loss of Gasket Materials Upon Exposure to Elevated Temperatures
• Effective Date: 01-May-2011
• Referred By: ASTM E2785-14(2022) - Standard Test Method for Exposure of Firestop Materials to Severe Environmental Conditions
• Effective Date: 01-Apr-2004

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:F495–99a (Reapproved 2004)
Standard Test Method for
Weight Loss of Gasket Materials Upon Exposure to Elevated
Temperatures
ThisstandardisissuedunderthefixeddesignationF495;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 4. Test Specimens
1.1 This test method covers the determination of gasket 4.1 Specimens shall consist ofa5to 10-g quantity of the
material weight loss upon exposure to elevated temperatures. material. The specimens shall be cut into pieces not larger than
1.2 The values stated in SI units are to be regarded as the 12.7 mm ( ⁄2 in.) square to allow all of it to be placed within the
standard. The values given in parentheses are for information crucible.
only.
5. Conditioning
1.3 This test method may include hazardous materials,
operations, and equipment. 5.1 Afterthespecimenhasbeencutorbrokenupandplaced
in the crucible, heat it in the circulating air oven for 1 h at
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 100°C (212°F) and allow it to cool to 21 to 30°C (70 to 86°F)
in the desiccator.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
6. Number of Tests
bility of regulatory limitations prior to use.
6.1 A minimum of three tests shall be run on separate
2. Significance and Use
specimens taken from the same sample with the results
averaged, unless otherwise agreed upon between the producer
2.1 Weight loss represents the amount of combustibles and
volatiles of the material at various temperatures between and the user.
315°C (600°F) and 815°C (1499°F).This procedure should not
7. Procedure
be used to determine percent of binder content.
7.1 Heat a clean crucible for 30 min at the specified test
3. Apparatus
temperature. Cool to 21 to 30°C (70 to 86°F) in a desiccator.
Weigh the crucible on the analytical balance and record as W .
3.1 Muffle Furnace, capable of maintaining a temperature
range between 315°C (600°F) and 815°C (1499°F) with an 7.2 Place the cut or broken-up specimen in the crucible and
condition in accordance with 5.1. Weigh the specimen and
accuracy of 65°C (9°F).
3.2 Porcelain Crucible. crucible and record the weight as W .
7.3 Place the specimen and the crucible in the muffle
3.3 Analytical Balance.
3.4 Desiccator, containing anhydrous calcium chloride or furnace at the temperature level determined for this test for 60
min (recommend 61 min), cool the specimen and the crucible
silica gel.
3.5 Circulating Air Oven, maintained at 100 6 2°C (2126 to 21 to 30°C (70 to 86°F) in a desiccator, weigh the specimen
and crucible and record the weight a
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