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ASTM F112-00(2013)

(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 and health practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements, see Section 6.

General Information

Status
Historical
Publication Date
30-Apr-2013
ICS
21.140 - Seals, glands
Technical Committee
F03 - Gaskets
Drafting Committee
F03.10 - Composite Gaskets
Current Stage
Ref Project

Relations

Replaces
ASTM F112-00(2006) - Standard Test Method for Sealability of Enveloped Gaskets
Effective Date
01-May-2013
Replaced By
ASTM F112-00(2019) - Standard Test Method for Sealability of Enveloped Gaskets
Effective Date
01-May-2019
Referred By
ASTM F363-99(2018) - Standard Test Method for Corrosion Testing of Gaskets
Effective Date
01-May-2013
Referred By
ASTM F336-02(2023) - Standard Practice for Design and Construction of Nonmetallic Enveloped Gaskets for Corrosive Service
Effective Date
01-May-2013

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ASTM F112-00(2013) - Standard Test Method for Sealability of Enveloped GasketsASTM F112-00(2013) - Standard Test Method for Sealability of Enveloped Gaskets
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ASTM F112-00(2013) - Standard Test Method for Sealability of Enveloped Gaskets
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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: F112 − 00 (Reapproved 2013)
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 3. Summary of Method
1.1 This test method covers the evaluation of the sealing 3.1 An enveloped gasket is compressed between two bolted
propertiesofenvelopedgasketsforusewithcorrosion-resistant flanges in a special test fixture. After the specified load is
process equipment. Enveloped gaskets are described as gas- applied to the gasket, air at the specified pressure is introduced
kets having some corrosion-resistant covering over the internal into the test chamber and then the test chamber is sealed.
area normally exposed to the corrosive environment. The Pressure and temperature readings are taken and recorded at
shieldmaterialmaybeplastic(suchaspolytetrafluoroethylene) specified intervals. The leakage rate is measured by the change
or metal (such as tantalum). A resilient conformable filler is in the test chamber pressure over time. The flange load on the
usually used inside the envelope. The design and construction gasket is increased and the process is repeated.
of nonmetallic gaskets is covered in Practice F336.
3.2 Results of the sealability test are expressed as a graph of
1.2 The values stated in SI units are to be regarded as the remaining test chamber pressure versus time for the
standard. The values given in parentheses are for information specified conditions.
only.
4. Significance and Use
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4.1 This test method is designed to evaluate all types of
responsibility of the user of this standard to establish appro-
enveloped gaskets under controlled conditions with respect to
priate safety and health practices and determine the applica-
leakage and to provide measurable leakage rates.
bility of regulatory limitations prior to use. For specific
4.2 Determining torque required to seal a given gasket is
precautionary statements, see Section 6.
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.
F336 Practice for Design and Construction of Nonmetallic
This test method may also be used as a quality control test
Enveloped Gaskets for Corrosive Service
whenparametersareagreeduponbetweentheproducerandthe
2.2 ASTM Adjuncts:
user.
Detailed Drawing of Test Fixture
4.4 Leakage through the gasket or over the gasket, or both,
is determined by this test method.
This test method is under the jurisdiction ofASTM Committee F03 on Gaskets
5. Apparatus
and is the direct responsibility of Subcommittee F03.10 on Composite Gaskets.
Current edition approved May 1, 2013. Published May 2013. Originally
5.1 Leakage Test Unit—The unit shall contain a suitable
approved in 1970. Last previous edition approved in 2006 as F112 – 00 (2006).
pressure gauge to read from 0 to 2.1 MPa (0 to 300 psig) and
DOI: 10.1520/F0112-00R13.
2 mounted as shown in Fig. 1.
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
5.2 Compressed Air Supply, capable of supplying 621 kPa
gaskets. This fixture may also be used for other gasket materials or designs, with or
(90 psig) to the test unit.
without modification.
Supporting data have been filed atASTM International Headquarters and may be
obtained by requesting Research Report RR:F03-1000.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM The sole source of supply of the apparatus known to the committee at this time
Standards volume information, refer to the standard’s Document Summary page on is Pfaudler Co., 1000 West Ave., Rochester, NY 14603. If you are aware of
the ASTM website. alternative suppliers, please provide this information to ASTM International
Available from ASTM International Headquarters. Order Adjunct No. Headquarters.Your comments will receive careful consideration at a meeting of the
ADJF0112. Original adjunct produced in 1970. 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 (2013)
9.2 Assemble the gasket in the test unit.
NOTE 1—Tighten bolts evenly; follow numerical sequence.
FIG. 2 Bolt Tightening Progression
9.3 Lubricate the bolt threads well using molydisulfide dry
film or grease. Sanding the bottom of the bolt heads and the
FIG. 1 Test Unit
washers will minimize torque variables and ensure duplication
of results.
9.4 Gradually and evenly tighten the bolts to 39 N·m (29
5.3 Temperature Indicating Device—A thermometer ca-
pable of reading in increments of 1°C in the ambient tempera- lbf·ft) following the sequence indicated by the numbers in Fig.
2. Progression of the tightening on each bolt should be in
ture range.
approximately 7-N·m (5-lbf·ft) increments.
6. Hazards
9.5 Apply 621 kPa (90 psig) of air pressure into the test unit
6.1 Use only a unit suitable for a minimum of 1034 kPa
and seal. Record the pressure readings every hour for4hand
(150 psig).
then at the end of 20 h, but since the readings are temperature
dependent, take and record the temperature within the oil-filled
6.2 Ametal shield box with access doors is suggested as an
thermowell to coincide
...

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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.  
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