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ASTM F145-72(2009)

(Practice)

Standard Practice for Evaluating Flat-Faced Gasketed Joint Assemblies

Standard Practice for Evaluating Flat-Faced Gasketed Joint Assemblies

SIGNIFICANCE AND USE
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.
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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
30-Sep-2009
ICS
21.140 - Seals, glands
Technical Committee
F03 - Gaskets
Drafting Committee
F03.20 - Mechanical Test Methods
Current Stage
Ref Project

Relations

Replaces
ASTM F145-72(2003) - Standard Practice for Evaluating Flat-Faced Gasketed Joint Assemblies
Effective Date
01-Oct-2009

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ASTM F145-72(2009) - Standard Practice for Evaluating Flat-Faced Gasketed Joint AssembliesASTM F145-72(2009) - Standard Practice for Evaluating Flat-Faced Gasketed Joint Assemblies
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ASTM F145-72(2009) - Standard Practice for Evaluating Flat-Faced Gasketed Joint Assemblies
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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: F145 − 72(Reapproved 2009)
Standard Practice for
Evaluating Flat-Faced Gasketed Joint Assemblies
ThisstandardisissuedunderthefixeddesignationF145;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
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 of other gasket properties that determine the service behavior
of a joint assembly.Thus, being able to determine the degree of
1.1 This practice permits measurement of gasket compres-
compression in a gasket under the bolt loading will permit one
sion resulting from bolt loading on a flat-face joint assembly at
to make qualitative predictions of the behavior of a joint
ambient conditions.
assembly when it comes in contact with the application or
1.2 The values stated in SI units are to be regarded as the
service environment. With the plug test, bending of a flange
standard. The values given in parentheses are for information
facing between bolt centers can be measured; however, in a
only.
few highly distortable flanges the maximum bending between
1.3 This standard does not purport to address all of the
bolt centers may not be detected.
safety concerns, if any, associated with its use. It is the
4.2 The variation in gasket compressions at selected points
responsibility of the user of this standard to establish appro-
in a flat-face joint assembly reveals the degree of flange
priate safety and health practices and determine the applica-
distortion or the ability of the flange to distribute satisfactorily
bility of regulatory limitations prior to use.
the compressive forces from bolt loads throughout the gasket.
2. Referenced Documents
5. Apparatus (see Fig. 1)
2.1 ASTM Standards:
5.1 Test Assembly, any flat-face flange design.
E171 Practice for Conditioning and Testing Flexible Barrier
5.2 Torque Indicating Device, for bolt loading.
Packaging
5.3 Dial Gage Indicator, graduated in 0.00254 mm (0.0001
3. Summary of Practice
in.) to measure thickness of the solder plugs and the uncom-
pressed gasket.
3.1 The gasket compression and flange distortion are ob-
tained from compressed-thickness measurements on cylindri-
5.4 Leather Punch, for punching holes in the gasket and
cally shaped soft-solder plugs (50-50 lead-tin by weight)
fabricating the solder plugs.
inserted into holes, drilled or punched through the gasket in the
5.5 Tweezers, to conveniently handle the solder plugs.
thickness direction. Initial compression is accomplished in the
5.6 SolderPlugs—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
4. Significance and Use
the height need only be such that the plug is compressed by the
flanges when the gasket is also compressed. The initial
4.1 Gasket compressions produced by bolt loads in a
thickness of the plug and gasket before compression need not
flanged joint are important in the application engineering of a
be equal.
joint assembly. They are related to the ability of a gasket to
seal, to maintain tightness on assembly bolts, and to a variety
6. Test Specimens
6.1 Three gasket specimens shall be tested. The size and
This practice is under the jurisdiction ofASTM Committee F03 on Gaskets and
shape of the specimens must be such as to fit the particular
is the direct responsibility of Subcommittee F03.20 on Mechanical Test Methods.
flange design.
Current edition approved Oct. 1, 2009. Published March 2010. Originally
approved in 1972. Last previous edition approved in 2003 as F145 – 72 (2003).
7. Conditioning
DOI: 10.1520/F0145-72R09.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7.1 When the test is performed on an assembly line or in a
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
service environment, sufficient time should elapse for the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. flanges,bolts,andgaskettoreachequilibriumwiththeambient
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F145 − 72 (2009)
FIG. 1 Equipment for Performing the Solder-Plug Test of Gasket Compressions
temperature and humidity conditions before assembly. (Heavy where:
castings or forgings may require 8 to 24 h or more, contrasted
C = percentage compression in the gasket,
to a brief period fo
...

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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.  
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SCOPE
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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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
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