ASTM F145-72(2023)
(Practice)Standard Practice for Evaluating Flat-Faced Gasketed Joint Assemblies
Standard Practice for Evaluating Flat-Faced Gasketed Joint Assemblies
SIGNIFICANCE AND USE
4.1 Gasket compressions produced by bolt loads in a flanged joint are important in the application engineering of a joint assembly. They are related to the ability of a gasket to seal, to maintain tightness on assembly bolts, and to a variety of other gasket properties that determine the service behavior of a joint assembly. Thus, being able to determine the degree of compression in a gasket under the bolt loading will permit one to make qualitative predictions of the behavior of a joint assembly when it comes in contact with the application or service environment. With the plug test, bending of a flange facing between bolt centers can be measured; however, in a few highly distortable flanges the maximum bending between bolt centers may not be detected.
4.2 The variation in gasket compressions at selected points in a flat-face joint assembly reveals the degree of flange distortion or the ability of the flange to distribute satisfactorily the compressive forces from bolt loads throughout the gasket.
SCOPE
1.1 This practice permits measurement of gasket compression resulting from bolt loading on a flat-face joint assembly at ambient conditions.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: F145 − 72 (Reapproved 2023)
Standard Practice for
Evaluating Flat-Faced Gasketed Joint Assemblies
This standard is issued under the fixed designation F145; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Significance and Use
1.1 This practice permits measurement of gasket compres- 4.1 Gasket compressions produced by bolt loads in a
sion resulting from bolt loading on a flat-face joint assembly at flanged joint are important in the application engineering of a
ambient conditions. joint assembly. They are related to the ability of a gasket to
seal, to maintain tightness on assembly bolts, and to a variety
1.2 The values stated in SI units are to be regarded as the
of other gasket properties that determine the service behavior
standard. The values given in parentheses are for information
of a joint assembly. Thus, being able to determine the degree of
only.
compression in a gasket under the bolt loading will permit one
1.3 This standard does not purport to address all of the
to make qualitative predictions of the behavior of a joint
safety concerns, if any, associated with its use. It is the
assembly when it comes in contact with the application or
responsibility of the user of this standard to establish appro-
service environment. With the plug test, bending of a flange
priate safety, health, and environmental practices and deter-
facing between bolt centers can be measured; however, in a
mine the applicability of regulatory limitations prior to use.
few highly distortable flanges the maximum bending between
1.4 This international standard was developed in accor-
bolt centers may not be detected.
dance with internationally recognized principles on standard-
4.2 The variation in gasket compressions at selected points
ization established in the Decision on Principles for the
in a flat-face joint assembly reveals the degree of flange
Development of International Standards, Guides and Recom-
distortion or the ability of the flange to distribute satisfactorily
mendations issued by the World Trade Organization Technical
the compressive forces from bolt loads throughout the gasket.
Barriers to Trade (TBT) Committee.
5. Apparatus (see Fig. 1)
2. Referenced Documents
5.1 Test Assembly, any flat-face flange design.
2.1 ASTM Standards:
5.2 Torque Indicating Device, for bolt loading.
E171 Practice for Conditioning and Testing Flexible Barrier
Packaging
5.3 Dial Gage Indicator, graduated in 0.00254 mm (0.0001
in.) to measure thickness of the solder plugs and the uncom-
3. Summary of Practice
pressed gasket.
3.1 The gasket compression and flange distortion are ob-
5.4 Leather Punch, for punching holes in the gasket and
tained from compressed-thickness measurements on cylindri-
fabricating the solder plugs.
cally shaped soft-solder plugs (50-50 lead-tin by weight)
5.5 Tweezers, to conveniently handle the solder plugs.
inserted into holes, drilled or punched through the gasket in the
thickness direction. Initial compression is accomplished in the
5.6 Solder Plugs—The solder must be made into a flat strip.
flanged-joint assembly when the bolts are loaded at ambient
This can be done by compressing wire in a vise, a pair of
temperature. Solder, being inelastic, will remain at the com-
flanges, pliers, or passing it between two calender rolls. The
pressed thickness of the gasket after the joint is subsequently
solder plugs are punched from the strip by means of the leather
disassembled.
punch. Recommended plug diameter is 0.8 mm ( ⁄32 in.) and
the height need only be such that the plug is compressed by the
flanges when the gasket is also compressed. The initial
This practice is under the jurisdiction of ASTM Committee F03 on Gaskets and
thickness of the plug and gasket before compression need not
is the direct responsibility of Subcommittee F03.20 on Mechanical Test Methods.
be equal.
Current edition approved April 1, 2023. Published April 2023. Originally
approved in 1972. Last previous edition approved in 2016 as F145 – 72 (2016).
6. Test Specimens
DOI: 10.1520/F0145-72R23.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.1 Three gasket specimens shall be tested. The size and
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
shape of the specimens must be such as to fit the particular
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. flange design.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F145 − 72 (2023)
FIG. 1 Equipment for Performing the Solder-Plug Test of Gasket Compressions
7. Conditioning These measurements are equal to the compressed thickness
exhibited by the gasket when it was loaded in the test assembly.
7.1 When th
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.