ASTM F118-04

Standard Definitions of Terms Relating to Gaskets

SCOPE
1.1 This standard is a compilation of terminology, related definitions, and descriptions of terms used in the gasket industry. Included terms are those used to define materials, testing technology, and testing results related to gaskets.

General Information

• Status: Historical
• Publication Date: 31-Mar-2004
• ICS: 01.040.21 - Mechanical systems and components for general use (Vocabularies)
• ICS: 21.140 - Seals, glands
• Technical Committee: F03 - Gaskets
• Drafting Committee: F03.94 - Terminology

Relations

• Replaces: ASTM F118-97 - Definitions of Gaskets
• Effective Date: 01-Apr-2004
• Referred By: ASTM F913-02(2021) - Standard Specification for Thermoplastic Elastomeric Seals (Gaskets) for Joining<brk/> Plastic Pipe
• Effective Date: 01-Apr-2004
• Referred By: ASTM D6497/D6497M-02(2021) - Standard Guide for Mechanical Attachment of Geomembrane to Penetrations or Structures
• 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:F118 −04
StandardDefinitions of Terms Relating to
1
Gaskets
This standard is issued under the fixed designation F118; the number immediately following the designation indicates the year of original
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.
1. Scope compressive yield—the point which the slope of the relation-
ship between applied stress and deformation of a gasket
1.1 This standard is a compilation of terminology, related
material changes. F1574
definitions, and descriptions of terms used in the gasket
industry. Included terms are those used to define materials,
creep—a transient stress-strain condition in which the strain
testing technology, and testing results related to gaskets.
increases as the stress remains constant. (This condition is
approached in flat-face gasketing joints in which the bolt
2. Terminology
undergoes a high elongation relative to any creep that might
take place in the gasket.) F38
adhesion—the measurable attraction or bonding of a gasket
material to a surface after the application of temperature, or
creep relaxation—a transient stress-strain condition in which
compressive stress, or both. F607
the strain increases concurrently with the decay of stress.
(This is the most common condition existing in flat-face
annulus—a cut gasket shape consisting of two concentric
gasketing assemblies in which the bolt exhibits a relatively
circles of known geometry.
large amount of elongation.) F38
binder—a component of certain gasket materials, which so-
cross-sectional area—the area of a gasket specimen defined as
lidifies the structure, imparts uniform adhesion to surfaces,
the width times the thickness.
and has an impact on the pore structure.
deflection—gasket material deformation in the "thickness
blowout, gasket—the sudden release of internal pressure by a
direction" caused by the application of stress. F1276
gasket sealing a flange with a given stress applied. The
internal pressure needed to create a blowout is also known as
deformation—the percentage by which a gasket material is
the blowout pressure. F434
deformed under stress or after the application of stress.
F1574
classification—a means of specifying categories of gasket
materials according to composition and physical character-
density—the mass per unit volume for a given gasket material
istics. F104
measured under defined conditions. F1315
combustibles—components of gasket material which are lost
description/line call out—an alphanumeric term used to
on ignition at a given temperature. F495
define the composition and physical properties of a gasket
compressed thickness—the measured thickness of a gasket material. F104, F868
material with a known compressive stress applied.
disintegration—the process by which a gasket material breaks
compressibility—in compressibility/recovery testing of gasket up into components or fragments after exposure to a given
materials, the difference between the specimen thickness fluid and/or environment. F148
under preload and thickness under total load, divided by the
durability—the resistance to disintegration of a gasket mate-
thickness under preload, expressed as a percent. F36, F806
rial after exposure to a given fluid and/or environment. F148
compressive strength/crush extrusion resistance—
flange—the members of a gasketed joint that compress the
maximum compressive stress before crush occurs at a
gasket.
specified temperature without regard for leakage. F1574
flange distortion—deviation of a contact surface from a
perfect plane.
1
These definitions are under the jurisdiction of ASTM Committee F03 on
flanged joint—see gasketed joint, which is a preferred term.
Gaskets and are the direct responsibility of Subcommittee F03.94 on Terminology.
Current edition approved April 1, 2004. Published May 2004. Originally
flat faced joint—a joint or flange with no raised contact
approved in 1970. Last previous edition approved in 1997 as F118 – 97. DOI:
10.1520/F0118-04. surface.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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F118−04
flexibility—the ratio of mandrel size a gasket material can be ness and thickness under total load, divided by the difference
bent 180 degrees around without cracking to the thickness of between the thickness under preload and thickness under
said gasket material. F147 total load, expressed as a percent.
resiliency—in compressibility/recovery testing of gasket ma-
fluid—a gas or liquid used for immersion and sealability
testing of gasket materials. F37, F146 terials, the difference between the specimen recovered thick-
ness and thickness
...