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ASTM F112-00(2019)

(Test Method)

Standard Test Method for Sealability of Enveloped Gaskets

Standard Test Method for Sealability of Enveloped Gaskets

SIGNIFICANCE AND USE
4.1 This test method is designed to evaluate all types of enveloped gaskets under controlled conditions with respect to leakage and to provide measurable leakage rates.  
4.2 Determining torque required to seal a given gasket is also part of this test method. By converting the torque at sealing to total bolt load, useful design information may be obtained for other standard and nonstandard openings.  
4.3 This test method may be used as an incoming quality control test to evaluate similar gaskets from different suppliers. This test method may also be used as a quality control test when parameters are agreed upon between the producer and the user.  
4.4 Leakage through the gasket or over the gasket, or both, is determined by this test method.
SCOPE
1.1 This test method covers the evaluation of the sealing properties of enveloped gaskets for use with corrosion-resistant process equipment.2 Enveloped gaskets are described as gaskets having some corrosion-resistant covering over the internal area normally exposed to the corrosive environment. The shield material may be plastic (such as polytetrafluoroethylene) or metal (such as tantalum). A resilient conformable filler is usually used inside the envelope. The design and construction of nonmetallic gaskets is covered in Practice F336.  
1.2 The values stated in SI units are to be regarded as 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. For specific precautionary statements, see Section 6.  
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

Status
Published
Publication Date
30-Apr-2019
ICS
21.140 - Seals, glands
Technical Committee
F03 - Gaskets
Drafting Committee
F03.10 - Composite Gaskets
Current Stage
Ref Project

Relations

Replaces
ASTM F112-00(2013) - Standard Test Method for Sealability of Enveloped Gaskets
Effective Date
01-May-2019
Refers
ASTM F37-06(2019) - Standard Test Methods for Sealability of Gasket Materials
Effective Date
01-May-2019
Refers
ASTM F37-06(2013) - Standard Test Methods for Sealability of Gasket Materials
Effective Date
01-May-2013
Refers
ASTM F336-02(2009) - Standard Practice for Design and Construction of Nonmetallic Enveloped Gaskets for Corrosive Service
Effective Date
01-May-2009
Refers
ASTM F37-06 - Standard Test Methods for Sealability of Gasket Materials
Effective Date
15-Nov-2006
Refers
ASTM F336-02 - Standard Practice for Design and Construction of Nonmetallic Enveloped Gaskets for Corrosive Service
Effective Date
10-Oct-2002
Refers
ASTM F37-00 - Standard Test Methods for Sealability of Gasket Materials
Effective Date
10-Apr-2000
Refers
ASTM F336-97 - Standard Practice for Design and Construction of Nonmetallic Enveloped Gaskets for Corrosive Service
Effective Date
10-Nov-1997
Referred By
ASTM F363-99(2018) - Standard Test Method for Corrosion Testing of Gaskets
Effective Date
01-May-2019
Referred By
ASTM F336-02(2023) - Standard Practice for Design and Construction of Nonmetallic Enveloped Gaskets for Corrosive Service
Effective Date
01-May-2019

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ASTM F112-00(2019) - Standard Test Method for Sealability of Enveloped GasketsASTM F112-00(2019) - Standard Test Method for Sealability of Enveloped Gaskets
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ASTM F112-00(2019) - Standard Test Method for Sealability of Enveloped Gaskets
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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: F112 − 00 (Reapproved 2019)
Standard Test Method for
Sealability of Enveloped Gaskets
ThisstandardisissuedunderthefixeddesignationF112;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 F336 Practice for Design and Construction of Nonmetallic
Enveloped Gaskets for Corrosive Service
1.1 This test method covers the evaluation of the sealing
propertiesofenvelopedgasketsforusewithcorrosion-resistant 2.2 ASTM Adjuncts:
2 4
process equipment. Enveloped gaskets are described as gas- Detailed Drawing of Test Fixture
kets having some corrosion-resistant covering over the internal
area normally exposed to the corrosive environment. The
3. Summary of Method
shieldmaterialmaybeplastic(suchaspolytetrafluoroethylene)
3.1 An enveloped gasket is compressed between two bolted
or metal (such as tantalum). A resilient conformable filler is
flanges in a special test fixture. After the specified load is
usually used inside the envelope. The design and construction
applied to the gasket, air at the specified pressure is introduced
of nonmetallic gaskets is covered in Practice F336.
into the test chamber and then the test chamber is sealed.
1.2 The values stated in SI units are to be regarded as
Pressure and temperature readings are taken and recorded at
standard. The values given in parentheses are for information
specified intervals. The leakage rate is measured by the change
only.
in the test chamber pressure over time. The flange load on the
gasket is increased and the process is repeated.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3.2 Results of the sealability test are expressed as a graph of
responsibility of the user of this standard to establish appro-
the remaining test chamber pressure versus time for the
priate safety, health, and environmental practices and deter-
specified conditions.
mine the applicability of regulatory limitations prior to use.
For specific precautionary statements, see Section 6.
4. Significance and Use
1.4 This international standard was developed in accor-
4.1 This test method is designed to evaluate all types of
dance with internationally recognized principles on standard-
enveloped gaskets under controlled conditions with respect to
ization established in the Decision on Principles for the
leakage and to provide measurable leakage rates.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
4.2 Determining torque required to seal a given gasket is
Barriers to Trade (TBT) Committee.
also part of this test method. By converting the torque at
sealing to total bolt load, useful design information may be
2. Referenced Documents
obtained for other standard and nonstandard openings.
2.1 ASTM Standards:
4.3 This test method may be used as an incoming quality
F37 Test Methods for Sealability of Gasket Materials
control test to evaluate similar gaskets from different suppliers.
This test method may also be used as a quality control test
whenparametersareagreeduponbetweentheproducerandthe
This test method is under the jurisdiction ofASTM Committee F03 on Gaskets
user.
and is the direct responsibility of Subcommittee F03.10 on Composite Gaskets.
Current edition approved May 1, 2019. Published June 2019. Originally
4.4 Leakage through the gasket or over the gasket, or both,
approved in 1970. Last previous edition approved in 2013 as F112 – 00 (2013).
is determined by this test method.
DOI: 10.1520/F0112-00R19.
This test method is to be used in place of Test Methods F37, which apply only
to single-component gasket materials and are not applicable to envelope-style
gaskets. This fixture may also be used for other gasket materials or designs, with or
without modification. Available from ASTM International Headquarters. Order Adjunct No.
Supporting data have been filed atASTM International Headquarters and may be ADJF0112. Original adjunct produced in 1970.
obtained by requesting Research Report RR:F03-1000. The sole source of supply of the apparatus known to the committee at this time
For referenced ASTM standards, visit the ASTM website, www.astm.org, or is Pfaudler Co., 1000 West Ave., Rochester, NY 14603. If you are aware of
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM alternative suppliers, please provide this information to ASTM International
Standards volume information, refer to the standard’s Document Summary page on Headquarters.Your comments will receive careful consideration at a meeting of the
the ASTM website. responsible technical committee, which you may attend.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F112 − 00 (2019)
5. Apparatus
5.1 Leakage Test Unit—The unit shall contain a suitable
pressure gauge to read from 0 to 2.1 MPa (0 to 300 psig) and
mounted as shown in Fig. 1.
5.2 Compressed Air Supply, capable of supplying 621 kPa
(90 psig) to the test unit.
5.3 Temperature Indicating Device—A thermometer ca-
pable of reading in increments of 1°C in the ambient tempera-
ture range.
6. Hazards
6.1 Use only a unit suitable for a minimum of 1034 kPa
(150 psig).
6.2 Ametal shield box with access doors is suggested as an
added safety factor.
NOTE 1—Tighten bolts evenly; follow numerical sequence.
6.3 Prior to performing any tests, inspect the unit for
FIG. 2 Bolt Tightening Progression
damage, corrosion, and also for metal fatigue cracks that may
have developed.
7. Test Specimen
enveloped gaskets and the components used in their construc-
tion would not be affected by aging under normal storage
7.1 Commercial 102-mm (4-in.) nominal size enveloped
conditions.
gasket with a shield 102 mm (4 in.) in inside diameter
(minimum) and inserts 114 mm (4.5 in.) in inside diameter by
9. Procedure
175 mm (6.88
...

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3.1 This test method is designed to compare all types of gaskets under simulated field operating conditions. Performance of a gasket can thus be measured prior to the start-up of chemical processes.5 The design of the test unit provides maximum range of corrosion resistance so that meaningful results are possible. This test method may be used as a routine test when agreed upon between the purchaser and the seller.
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1.1 This test method covers the evaluation of gaskets under corrosive conditions at varying temperature and pressure levels. The test unit may be glass lined if the flanges are sufficiently plane (industry accepted), thus providing resistance to all chemicals, except hydrofluoric acid, from cryogenic temperatures to 260°C (500°F) at pressures from full vacuum to the allowable pressure rating of the unit, or made of other suitable material. The test unit described (Fig. 1) has an internal design pressure rating of 1034 kPa (150 psi) at 260°C (500°F).
FIG. 1 Test Unit  
1.2 The values stated in SI units are to be regarded as the standard.  
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. For specific hazards statements, see Section 5.  
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