ASTM F1909-1998(2004) Specification for Preformed Open-Cell Sponge Rubber Pail and Drum Gaskets《预制开口泡沫橡胶桶和桶衬垫规范》.pdf
《ASTM F1909-1998(2004) Specification for Preformed Open-Cell Sponge Rubber Pail and Drum Gaskets《预制开口泡沫橡胶桶和桶衬垫规范》.pdf》由会员分享,可在线阅读,更多相关《ASTM F1909-1998(2004) Specification for Preformed Open-Cell Sponge Rubber Pail and Drum Gaskets《预制开口泡沫橡胶桶和桶衬垫规范》.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: F 1909 98 (Reapproved 2004)Standard Specification forPreformed OpenCell Sponge Rubber Pail and DrumGaskets1This standard is issued under the fixed designation F 1909; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the
2、 year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 or
3、reconditioned 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 safe
4、ty 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.NOTE 1ISO Equivalency StatementThis proposed specification wasfound to be not eq
5、uivalent.2. Referenced Documents2.1 ASTM Standards:2D 395 Test Methods for Rubber PropertyCompressionSetD 471 Test Method for Rubber PropertyEffect of LiquidsD 573 Test Method for RubberDeterioration in an AirOvenD 575 Test Methods for Rubber Properties in CompressionD 1056 Specification for Flexibl
6、e Cellular MaterialsSponge or Expanded RubberD 3182 Practice for RubberMaterials, Equipment, andProcedures for Mixing Standard Compounds and Prepar-ing Standard Vulcanized SheetsD 3183 Practice for RubberPreparation of Pieces for TestPurposes from Products3. Terminology3.1 Definitions of Terms Speci
7、fic 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
8、 (1 in.) diametermandrel at a uniform rate of one lap in5sintheform 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
9、 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 pre-dominantly open cells made from
10、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 comb
11、ination, 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.
12、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 (
13、2 to 7 psi).1This specification is under the jurisdiction of ASTM Committee F03 on Gasketsand is the direct responsibility of Subcommittee F03.60 on Specifications for GasketMaterials.Current edition approved April 1, 2004. Published April 2004. Originallyapproved in 1998. Last previous edition appr
14、oved in 1998 as F 190998.2For 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.1Copyright ASTM International, 100 B
15、arr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.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).5. Materials and Manufacture5.1 Sponge rubber gaskets are made by inc
16、orporating 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
17、 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 otherwise specified, the color of cellularrubber gaskets shall be
18、 tan or black.7. Tolerances on Dimensions7.1 Tolerances on dimensions of cellular rubber gasketsshall be as specified in Table 2.7.2 Measurements of Test SpecimensThickness and widthshall be measured using a dialtype gage3, having a maximumstem and circular foot mass of 25 g and a circular foot 31.8
19、 mm(1.250 in.) in diameter.8. Workmanship, Finish and Appearance8.1 Cellular rubber gaskets under this specification shall bemanufactured from natural rubber, synthetic rubber, or rubber-like materials, together with added compounding ingredients ofsuch nature and quality that the finished product c
20、omplies withthe specification requirements. In permitting choice in the useof materials by the producer, it is not intended to imply that thedifferent rubber materials are equivalent in respect to allphysical properties. Any special characteristics that may bedesired for specific applications other
21、than those prescribed inthis specification, shall be stated in the product specificationsas they may influence the choice of the type of rubber materialor other ingredients used. All materials and workmanship shallbe in accordance with good commercial practice, and theresulting cellular rubbers shal
22、l be free from defects affectingserviceability.9. Sampling9.1 When possible, the completed manufactured productshall be used for the tests specified. Representative samples ofthe lot being examined shall be selected at random as required.9.2 When the finished product does not lend itself to testingo
23、r to the taking of test specimens because of complicated shapeor other reasons, standard test slabs shall be prepared. Whendifferences due to the difficulty in obtaining suitable testspecimens from the finished part arise, manufacturer andpurchaser may agree on acceptable deviations. Agreement onacc
24、eptable deviations can be achieved by comparing results ofstandard test specimens with those obtained on actual parts.10. General Test Methods10.1 Except as otherwise specified in these test methods foropen-cell rubber, the following test methods shall be compliedwith as required and are hereby made
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