1、Designation:F11200(Reapproved 2013)Standard Test Method forSealability of Enveloped Gaskets1This standard is issued under the fixed designation F112;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in
2、 parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the evaluation of the sealingproperties of enveloped gaskets for use with corrosion-resistantprocess equipment.2Enveloped gas
3、kets are described as gas-kets having some corrosion-resistant covering over the internalarea normally exposed to the corrosive environment.Theshield material may be plastic(such as polytetrafluoroethylene)or metal(such as tantalum).A resilient conformable filler isusually used inside the envelope.T
4、he design and constructionof nonmetallic gaskets is covered in Practice F336.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.
5、It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.For specificprecautionary statements,see Section 6.2.Referenced Documents2.1 ASTM Standards:3F37 Test Methods for Sealabi
6、lity of Gasket MaterialsF336 Practice for Design and Construction of NonmetallicEnveloped Gaskets for Corrosive Service2.2 ASTM Adjuncts:Detailed Drawing of Test Fixture43.Summary of Method3.1 An enveloped gasket is compressed between two boltedflanges in a special test fixture.5After the specified
7、load isapplied to the gasket,air at the specified pressure is introducedinto the test chamber and then the test chamber is sealed.Pressure and temperature readings are taken and recorded atspecified intervals.The leakage rate is measured by the changein the test chamber pressure over time.The flange
8、 load on thegasket is increased and the process is repeated.3.2 Results of the sealability test are expressed as a graph ofthe remaining test chamber pressure versus time for thespecified conditions.4.Significance and Use4.1 This test method is designed to evaluate all types ofenveloped gaskets unde
9、r controlled conditions with respect toleakage and to provide measurable leakage rates.4.2 Determining torque required to seal a given gasket isalso part of this test method.By converting the torque atsealing to total bolt load,useful design information may beobtained for other standard and nonstand
10、ard openings.4.3 This test method may be used as an incoming qualitycontrol test to evaluate similar gaskets from different suppliers.This test method may also be used as a quality control testwhen parameters are agreed upon between the producer and theuser.4.4 Leakage through the gasket or over the
11、 gasket,or both,is determined by this test method.5.Apparatus5.1 Leakage Test UnitThe unit5shall contain a suitablepressure gauge to read from 0 to 2.1 MPa(0 to 300 psig)andmounted as shown in Fig.1.5.2 Compressed Air Supply,capable of supplying 621 kPa(90 psig)to the test unit.1This test method is
12、under the jurisdiction of ASTM Committee F03 on Gasketsand is the direct responsibility of Subcommittee F03.10 on Composite Gaskets.Current edition approved May 1,2013.Published May 2013.Originallyapproved in 1970.Last previous edition approved in 2006 as F112 00(2006).DOI:10.1520/F0112-00R13.2This
13、test method is to be used in place of Test Methods F37,which apply onlyto single-component gasket materials and are not applicable to envelope-stylegaskets.This fixture may also be used for other gasket materials or designs,with orwithout modification.Supporting data have been filed atASTM Internati
14、onal Headquarters and may beobtained by requesting Research Report RR:F03-1000.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe
15、ASTM website.4Available from ASTM International Headquarters.Order Adjunct No.ADJF0112.Original adjunct produced in 1970.5The sole source of supply of the apparatus known to the committee at this timeis Pfaudler Co.,1000 West Ave.,Rochester,NY 14603.If you are aware ofalternative suppliers,please pr
16、ovide this information to ASTM InternationalHeadquarters.Your comments will receive careful consideration at a meeting of theresponsible technical committee,1which you may attend.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.3 Temperature Indicating DeviceA thermometer ca-pable of reading in increments of 1C in the ambient tempera-ture range.6.Hazards6.1 Use only a unit suitable for a minimum of 1034 kPa(150 psig).6.2 A metal shie
