ASTM F1087-88(1997)

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

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

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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.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