1、Designation: F 147 87 (Reapproved 2003)Standard Test Method forFlexibility of Non-Metallic Gasket Materials1This standard is issued under the fixed designation F 147; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、 revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This test method covers the determinatio
3、n of the flex-ibility of non-metallic gasket materials. It is designed fortesting specimens cut from sheet goods or from the gasket inthe finished form, as supplied for commercial use. Materialsnormally classified as rubber compounds are excluded sincethey are covered in Classification D 2000.1.2 Th
4、e values stated in SI units are to be regarded as thestandard. 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. It is theresponsibility of the user of this standard to establish appro-pri
5、ate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:D 2000 Classification System for Rubber Products in Auto-motive Applications2F 104 Classification System for Nonmetallic Gasket Mate-rials2F 146 Test Meth
6、ods for Fluid Resistance of Gasket Materi-als23. Summary of Test Method3.1 A specimen of the material is bent 180 around amandrel of appropriate size relative to its thickness. Materialswill be tested both with and across grain on material with grainorientation. An elevated-temperature exposure cond
7、itioning isused to simulate shelf life. A low-temperature exposure condi-tioning is used to simulate handling at low-temperature envi-ronments. Tests may also be conducted after immersion invarious fluids in accordance with Test Method F 146.4. Significance and Use4.1 This test method is designed to
8、 measure the ability ofnon-metallic gasket materials to withstand handling, as wouldbe encountered before and during installation of cut gaskets.5. Apparatus5.1 Steel Die, 12.7 by 154.4 mm (0.5 by 6 in.).5.2 Circulating-Hot-Air Oven, maintained at 100 6 1C(212 6 2F).5.3 Cold Box, capable of maintain
9、ing 40 6 1C (40 62F).5.4 Mandrels, a series with diameters ranging from 4.8 to101.6 mm (316 to 4 in.).6. Test Specimens6.1 The specimens shall be cleanly die-cut to provide sharpedges, free of tears, nicks, or abraded particles. The minimumthickness for asbestos (Type 1) and synthetic (Type 7) fiber
10、containing materials shall be 0.4 mm (0.016 in.) and amaximum thickness of 6.3 mm (0.250 in.). The minimumthickness for cork (Type 2) composition shall be 3.2 mm (0.125in.) and 1.6 mm (0.062 in.) for cork-rubber materials, with amaximum thickness of 4.8 mm (0.186 in.). The minimumthickness for cellu
11、lose (Type 3) gasket materials shall be 0.127mm (0.005 in.) and the maximum thickness shall be 1.6 mm(0.062 in.). The minimum thickness for flexible graphite (Type5) shall be 0.127 mm (0.005 in.) and a maximum of 0.8 mm(0.031 in.).7. Conditioning7.1 Condition specimens in accordance with Classificat
12、ionSystem F104.8. Temperature of Test8.1 Tests will be conducted on specimens that are at atemperature of 21 to 29C (70 to 85F) except for thelow-temperature tests, where the specimen will be 40 6 1C(40 6 2F).1This test method is under the jurisdiction of ASTM Committee F03 on Gaskets,and is the dir
13、ect responsibility of Subcommittee F03.20 on Mechanical TestMethods.Current edition approved Oct. 1, 2003. Published October 2003. Originallyapproved in 1972. Last previous edition approved in 1997 as F 147 87 (1997).2Annual Book of ASTM Standards, Vol 09.02.1Copyright ASTM International, 100 Barr H
14、arbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.9. Procedure9.1 Firmly hold the specimen at one point on a circularmandrel and force slowly but firmly under finger pressure tocontact 180 of the full diameter. Repeat this flexure usingdecreasing mandrel diameters on a new le
15、ngth of specimenuntil failure occurs. Failure shall be any cracks, breaks, orsurface separations at the end of the approximate time (5 6 1s) required to flex the specimen.9.2 After exposure for 70 h at 100 6 2C (212 6 3.6F) inthe circulating-hot-air oven, remove the specimens and cool toroom tempera
16、ture in accordance with the conditioning proce-dure in Classification System F104. Cork-containing materialsshall be allowed to cool for 24 6 1 h. Then perform the testprocedure in 9.1 on the artificially aged specimen.9.3 Expose the specimens and the mandrel for6hat4061C (40 6 2F) in a cold chamber
17、. Without removing thespecimens from the cold chamber perform the test procedure in9.1 on the low-temperature specimen.10. Report10.1 Determine the results as the minimum diameter aboutwhich specimen could be flexed without exhibiting any signsof failure. This is to be reported on original, aged, an
18、dlow-temperature tests or whichever are applicable. Both withand across grain will also be reported on grain orientedmaterials. A flexibility factor may be calculated by dividingthis minimum diameter by the nominal original thickness,expressed to the nearest 0.4 mm (0.016 in.).10.2 The report shall
19、include the following:10.2.1 Complete sample description including commercialdesignation, source, manufacturer, and thickness,10.2.2 Date of production, if known, and deviations made inperforming the test method, and10.2.3 Test results expressed as the minimum diameter usedwithout any signs of failu
20、re or as the flexibility factor asdetermined in 9.1, or both.11. Precision and Bias11.1 The results obtained from this test method are based ona visual examination, and the quantitative values associatedwith precision data are not obtainable with this test method.12. Keywords12.1 flexibility; grain
21、orientation; shelf lifeASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringem
22、ent of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or
23、 for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views kn
24、own to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).F 147 87 (2003)2
