ASTM_F_1909_-_98_2012.pdf

Designation:F190998(Reapproved 2012)Standard Specification forPreformed OpenCell Sponge Rubber Pail and DrumGaskets1This standard is issued under the fixed designation F1909;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers preformed opencell spongerubber gaskets of the following classes for use in new orreconditioned pails or drums.1.1.1 Class ANonOil Resistant.1.1.2 Class BOil Resistant.1.2 The values stated in SI units are to be regarded as thestandard.1.3 The following safety hazards caveat pertains only toSection 10,General Test Methods.This standard does notpurport to address all of the safety concerns,if any,associatedwith its use.It is the responsibility of the user of this standardto establish appropriate safety and health practices anddetermine the applicability of regulatory limitations prior touse.NOTE1ISO Equivalency StatementThis proposed specification wasfound to be not equivalent.2.Referenced Documents2.1 ASTM Standards:2D395 Test Methods for Rubber PropertyCompression SetD471 Test Method for Rubber PropertyEffect of LiquidsD573 Test Method for RubberDeterioration in an AirOvenD575 Test Methods for Rubber Properties in CompressionD1056 Specification for Flexible Cellular MaterialsSponge or Expanded RubberD3182 Practice for RubberMaterials,Equipment,and Pro-cedures for Mixing Standard Compounds and PreparingStandard Vulcanized SheetsD3183 Practice for RubberPreparation of Pieces for TestPurposes from Products3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 cellular materiala generic term for materials con-taining many open cells dispersed throughout the mass.3.1.2 flexible cellular materiala flexible,cellular materialthat will not rupture within 60 s when a specimen 200 by 25 by25 mm(8 by 1 by 1 in.)is bent around a 25 mm(1 in.)diametermandrel at a uniform rate of one lap in 5 s in the form of a helixat a temperature between 18 and 29C(65 and 85F).3.1.3 natural skina relatively dense layer at the surface ofa cellular material.Normally,this natural skin is formed bycontact with the mold during manufacture.Parts made bycutting from opencell(sponge rubber)sheets usually havenatural skin on two faces and open cells at the cut edges.3.1.4 rubbera material that is capable of recovering fromlarge deformations quickly and forcibly.3.1.5 sponge rubbercellular rubber consisting of predomi-nantly open cells made from a solid rubber compound.4.Classification4.1 ClassesCellular rubbers are divided into two classes,which are designated by the letters A and B added to thenumber prefix.4.1.1 Class ACellular rubbers made from natural rubber,reclaimed rubber,synthetic rubber,or rubber-like materials,alone or in combination,where specific resistance to the actionof petroleumbase oils is not required.4.1.2 Class BCellular rubbers made from synthetic rubberor rubber-like materials,alone or in combination,havingspecific requirements for oil resistance.4.2 GradesEach class is divided into three differentgrades.Each grade is based on a specific range of firmness asexpressed by a 25%compression.Grades are designated bydigit,the softer grades being identified with the lower numbersand the harder grades being identified with the higher numbers.4.2.1 Grade 1A compression deflection range from 15 to50 kPa(2 to 7 psi).4.2.2 Grade 2A compression deflection range from 50 to85 kPa(7 to 12 psi).4.2.3 Grade 3A compression deflection range from 85 to120 kPa(12 to 17 psi).1This specification is under the jurisdiction ofASTM Committee F03 on Gasketsand is the direct responsibility of Subcommittee F03.60 on Specifications for GasketMaterials.Current edition approved Aug.1,2012.Published November 2012.Originallyapproved in 1998.Last previous edition approved in 2004 as F1909 98(2004).DOI:10.1520/F1909-98R12.2For 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 ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.Materials and Manufacture5.1 Sponge rubber gaskets are made by incorporating ablowing agent into the compound,such as sodium bicarbonate,that gives off a gas which expands the mass during thevulcanization process.5.2 Sponge rubber gaskets are manufactured to specifieddimensions.Unless otherwise specified,gasket sponge rubbershall have a natural skin on both the top and bottom surfaces.Fabric surface impressions are not objectionable.6.Physical Properties6.1 The various grades of cellular rubber shall conform tothe requirements as to physical properties in Table 1 and Table2.6.2 ColorUnless othe