ASTM F868-91(1997)e1

Standard Classification for Laminated Composite Gasket Materials

SCOPE
1.1 This classification provides a means for specifying or describing pertinent properties of commercial laminate composite gasket materials (LCGM). These structures are composed of two or more chemically different layers of material. These materials may be organic or inorganic, or combinations with various binders or impregnants. Gasket coatings are not covered since details thereof are intended to be given on engineering drawings, or as separate specifications. Commercial materials designated as enveloped gaskets are excluded from this classification; they are covered in Practice F336.  
1.2 Since all of the properties that contribute to gasket performance are not included, use of this classification as a basis for selecting LCGM is limited.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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-Dec-1996
• ICS: 21.140 - Seals, glands
• Technical Committee: F03 - Gaskets
• Drafting Committee: F03.30 - Classification

Relations

• Replaced By: ASTM F868-02 - Standard Classification for Laminated Composite Gasket Materials
• Effective Date: 10-Oct-2002
• Referred By: ASTM F3270/F3270M-17 - Standard Practice for Compression versus Load Properties of Gasket Materials
• Effective Date: 01-Jan-1997
• Referred By: ASTM F2325-14(2020) - Standard Classification for Multi-Layer Steel (MLS) and Other Metal Layer Gaskets for Transportation Applications
• Effective Date: 01-Jan-1997
• Referred By: ASTM F104-11(2020) - Standard Classification System for Nonmetallic Gasket Materials
• Effective Date: 01-Jan-1997
• Referred By: ASTM F1276-23 - Standard Test Method for Creep Relaxation of Laminated Composite Gasket Materials
• Effective Date: 01-Jan-1997
• Referred By: ASTM F336-02(2023) - Standard Practice for Design and Construction of Nonmetallic Enveloped Gaskets for Corrosive Service
• Effective Date: 01-Jan-1997
• Referred By: ASTM F3149-15(2021) - Standard Practice for Determining the Maintenance Factor (<emph type="bdit">m</emph >) and Yield Factor (<emph type="bdit">y</emph>) Loading Constants Applicable to Gasket Materials and Designs
• Effective Date: 01-Jan-1997
• Referred By: ASTM F2378-05(2023) - Standard Test Method for Sealability of Sheet, Composite, and Solid Form-in-Place Gasket Materials
• Effective Date: 01-Jan-1997

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.
e1
Designation: F 868 – 91 (Reapproved 1997)
Standard Classification for
Laminated Composite Gasket Materials
This standard is issued under the fixed designation F 868; 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.
e NOTE—Section 11 was corrected editorially in March 1997.
1. Scope Composite Gasket Materials
1.1 This classification covers a means for specifying or
3. Terminology
describing pertinent properties of commercial laminate com-
3.1 Definitions of Terms Specific to This Standard:
posite gasket materials (LCGM). These structures are com-
3.1.1 board—the term board is used in the context of a thick
posed of two or more chemically different layers of material.
(generally greater than 1.52 mm (0.060 in.)) and rigid nonme-
These materials may be organic or inorganic, or combinations
tallic material often purchased in sheet or strip form.
with various binders or impregnants. Gasket coatings are not
3.1.2 composite gasket material—a gasket structure com-
covered since details thereof are intended to be given on
posed of two or more different materials joined together in flat,
engineering drawings, or as separate specifications. Commer-
parallel layers.
cial materials designated as enveloped gaskets are excluded
from this classification; they are covered in Practice F 336.
4. Significance and Use
1.2 Since all of the properties that contribute to gasket
4.1 This classification is intended to encourage uniformity
performance are not included, use of this classification as a
in reporting properties; to provide a common language for
basis for selecting LCGM is limited.
communications between producers and users; to guide engi-
1.3 The values stated in SI units are to be regarded as the
neers and designers in the use, construction, and properties of
standard. The values given in parentheses are for information
commercially available materials; and to be versatile enough to
only.
cover new materials and test methods as they are introduced.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Basis of Classification
responsibility of the user of this standard to establish appro-
5.1 This classification is based on the principle that LCGM
priate safety and health practices and determine the applica-
should be described, insofar as possible, in terms of use,
bility of regulatory limitations prior to use.
composition, combining method, and specific physical and
mechanical characteristics. Thus, users of gasket materials can,
2. Referenced Documents
by selecting different combinations of materials and properties,
2.1 ASTM Standards:
2 define various parts. Suppliers, likewise, can report uses,
A 109 Specification for Steel, Strip, Carbon, Cold-Rolled
composition, and properties of available products.
D 2000 Classification System for Rubber Products in Auto-
motive Applications
6. Numbering System
F 104 Classification System for Nonmetallic Gasket Mate-
6.1 To permit line call-out of the description mentioned in
rials
5.1, this classification establishes letter or number symbols to
F 146 Test Methods for Fluid Resistance of Gasket Materi-
describe use, composition, and physical properties and perfor-
als
mance levels of certain properties.
F 336 Practice for Design and Construction of Nonmetallic
6.2 In specifying or describing gasket materials, each line
Enveloped Gaskets for Corrosive Service
call-out shall include the number of this system and a number
F 433 Practice for Evaluating Thermal Conductivity of
and letter series describing the use, composition, and combin-
Gasket Materials
ing method plus suffix call-out, as shown in Table 1.
F 1276 Test Method for Creep Relaxation of Laminated
6.3 To further specify or describe gasket materials, each line
call-out may include one or more suffix letter-numeral sym-
This classification is under the jurisdiction of ASTM Committee F-3 on Gaskets
bols, as listed in Table 2.
and is the direct responsibility of Subcommittee F03.10 on Composite Gaskets.
Current edition approved Aug. 15, 1991. Published October 1991. Originally
7. Physical and Mechanical Properties
published as F 868 – 84. Last previous edition F 868 – 88.
7.1 Gasket materials identified by this classification shall
Annual Book of ASTM Standards, Vol 01.03.
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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.
F 868
have a number and letter call-out for end-use and construction 10. Conditioning
indicated in Table 1 and additional properties by a letter-
10.1 Prior to all tests, specimens shall be conditioned as
numeral call-out shown in Table 2.
follows:
10.1.1 When all Classification F 104 layers of the composite
8. Thickness Requirements
are of the same “type,” condition per that type.
8.1 Gasket materials identified by this classification shall
10.1.2 When the layers of the composite are of different
conform to the thickness specified on the gasket drawing or on
Classification F 104 “types,” the composite shall be condi-
the order.
tioned 22 h in a control
...