ASTM F1087-02

Standard Test Method for Linear Dimensional Stability of a Gasket Material to Moisture

SIGNIFICANCE AND USE
Gasket materials undergo several processing steps from point of manufacture to installation in a flange. Many applications require close control of dimensional change. An accurate test method for determining the relative stability of various materials is needed for design and quality assurance purposes. This test method is useful towards that end. It simulates the extreme storage conditions that a material may undergo prior to installation. Samples are allowed unrestricted expansion or contraction, and so this test method should not be used to predict behavior clamped in a flange or other applications, or during specific processing steps.
This test method measures linear change, and may need to be modified if the test specimen is not flat, homogeneous, or free of voids.
SCOPE
1.1 This test method covers a procedure to determine the stability of a gasket material to linear dimensional change due to hygroscopic expansion and contraction. It subjects a sample to extremes, that is, oven drying and complete immersion in water, that have shown good correlation to low and high relative humidities.
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 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: 09-Mar-2002
• ICS: 21.140 - Seals, glands
• Technical Committee: F03 - Gaskets
• Drafting Committee: F03.20 - Mechanical Test Methods

Relations

• Replaces: ASTM F1087-88(1997) - Standard Test Method for Linear Dimensional Stability of a Gasket Material to Moisture
• Effective Date: 10-Mar-2002
• Replaced By: ASTM F1087-02(2009) - Standard Test Method for Linear Dimensional Stability of a Gasket Material to Moisture
• Effective Date: 01-May-2009
• Referred By: ASTM D4869/D4869M-16a(2021) - Standard Specification for Asphalt-Saturated Organic Felt Underlayment Used in Steep Slope Roofing
• Effective Date: 10-Mar-2002
• Referred By: ASTM D6757/D6757M-18(2023) - Standard Specification for Underlayment Felt Containing Inorganic Fibers Used in Steep-Slope Roofing
• Effective Date: 10-Mar-2002

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:F1087–02
Standard Test Method for
Linear Dimensional Stability of a Gasket Material to
1
Moisture
This standard is issued under the fixed designation F 1087; 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 3.2 This test method measures linear change, and may need
to be modified if the test specimen is not flat, homogeneous, or
1.1 This test method covers a procedure to determine the
free of voids.
stability of a gasket material to linear dimensional change due
to hygroscopic expansion and contraction. It subjects a sample
4. Apparatus
to extremes, that is, oven drying and complete immersion in
4.1 This test method allows individual laboratories to select
water, that have shown good correlation to low and high
2 measuring devices of their own choice, but requires that the
relative humidities.
device be able to measure with a precision of 60.025 mm
1.2 The values stated in SI units are to be regarded as the
(0.001 in.).
standard. The values given in parentheses are for information
only.
5. Sampling
1.3 This standard does not purport to address all of the
5.1 At least six test specimens should be taken for each
safety concerns, if any, associated with its use. It is the
sample material, three for the high humidity and three for the
responsibility of the user of this standard to establish appro-
low humidity tests. The samples should be cut 2.54 cm (1.00
priate safety and health practices and determine the applica-
in.) wide, and between 20 and 30 cm (8 and 12 in.) in length.
bility of regulatory limitations prior to use.
The long direction should be in the direction that experiences
2. Summary of Test Method the greatest dimensional change, generally the cross machine
or against the grain direction. If there is doubt, both directions
2.1 A series of samples are preconditioned to a stable
should be sampled, and the results of the direction with the
starting point, measured, and then conditioned to a second
greatest change reported.
exposure condition, either wet or dry. These changes are then
determined and recorded, and the results presented as percent
6. Conditioning
change.
6.1 Test specimens should be preconditioned at least 20 h in
a controlled environment maintained between 21 to 30°C (70
3. Significance and Use
to 85°F) and 50 to 55 % relative humidity.
3.1 Gasket materials undergo several processing steps from
point of manufacture to installation in a flange. Many applica-
7. Procedure
tions require close control of dimensional change.An accurate
7.1 Measure test specimens to 60.025 mm (60.001 in.) and
test method for determining the relative stability of various
record values as initial readings. If the test specimen is marked
materials is needed for design and quality assurance purposes.
for identification or measurement, be certain that the mark is
This test method is useful towards that end. It simulates the
easily visible and will withstand exposure to heat and immer-
extremestorageconditionsthatamaterialmayundergopriorto
sion in water.
installation. Samples are allowed unrestricted expansion or
7.2 Testing for Dimensional Stability to Low Humidity—
contraction, and so this test method should not be used to
Expose three prepared specimens in a forced hot-air oven set at
predict behavior clamped in a flange or other applications, or
100 6 2°C (212 6 4°F) for 5 h. Remove specimens and allow
during specific processing steps.
to cool between 21 to 30°C (70 to 85°F) in a desiccator
containing anhydrous-calcium chloride or suitable desiccant
1
This test method is under the jurisdiction ofASTM Committee F03 on Gaskets
material. Remeasure and record measurements as final read-
and is the direct responsibility of Subcommittee F03.20 on Mechanical Test
ings.
Methods.
Current edition approved Mar. 10, 2002. Published April 2002. Originally
7.3 Testing for Dimensional Stability to High Humidity—
published as F 1087 - 88. Last previous edition F 1087 - 88 (1997).
Immerse three prepared specimens into a tray of deionized
2
Since this test method takes a “worst case” approach, actual dimensional
water to a depth of 1.2 cm (0.5 in.) for a 22 h period. For
change due to atmospheric conditions would be expected to be less.
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F1087
TABLE 2 Change to Wet Condition
materials that are buoyant in water, a supported wire screen or
expanded metal cover should be used with adequate weights to Repeat- Reproduc- Test Method
Average
...