1、Designation:D376703(Reapproved 2014)Standard Practice forRubberMeasurement of Dimensions1This standard is issued under the fixed designation D3767;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
2、parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This practice is intended for use in determining thegeometrical
3、dimensions of rubber products and specimens forphysical tests.This practice describes procedures for determin-ing length,width,thickness,diameter,and circumference.Thispractice does not cover sampling of materials or products,orlocations where a sample is to be taken.1.2 The values stated in either
4、acceptable metric units or inother units shall be regarded separately as a standard.Thevalues stated in each system may not be exact equivalents;therefore,each system must be used independently of the other,without combining values in any other way.1.3 This standard does not purport to address all o
5、f thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility or regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1415 Test Method for Rubbe
6、r PropertyInternationalHardnessD3183 Practice for RubberPreparation of Pieces for TestPurposes from Products3.Summary of Practice3.1 Specific procedures are outlined depending upon size,texture,and shape of the test specimens undergoing measure-ment.3.1.1 Procedure A encompasses linear dimensions up
7、 to 30mm using a flat-footed micrometer on flat sheets and testspecimens.3.1.2 Procedure A1 encompasses thickness dimensions upto 30 mm using a micrometer with contact members that aredomed surfaces.This procedure is employed on irregularlyshaped test specimens and compression set test specimens.3.1
8、.3 Procedure A2 encompasses thickness measurementsof flexible cellular test specimens up to 30 mm using amicrometer with large area flat contact members.3.1.4 Procedure B encompasses linear dimensions between30 and 100 mm using a vernier caliper.3.1.5 Procedure C encompasses linear dimensions above1
9、00 mm using a tape or linear scale.3.1.6 Procedure D encompasses thickness measurements onsoft thin materials using a microscope.3.1.7 Procedure E encompasses circumference measure-ments by cone.4.Significance and Use4.1 Dimensional measurements specified in this practice aremade for one of the foll
10、owing purposes:(1)to determineconformance with specification requirements regarding geo-metrical properties of whole units,such as the size of rubbergloves,or the diameter and circumference of rubber hose,(2)to determine conformance with specification requirementsregarding particular functional part
11、s of units,such as thethickness of the soles of boots,or(3)to determine geometricalvalues that are necessary in the calculation of test results forphysical properties for which requirements are specified,suchas the thickness of a test specimen for tensile strength.Themethod to be used shall be as sp
12、ecified in the detail specifica-tion or appropriate test method.4.2 Pressure applied by measuring instruments has a signifi-cant effect on the observed thickness of soft flexible materials,and it is therefore necessary to specify the pressure imposed bythe foot of the instrument on the test piece fo
13、r accuratecomparative measurements of such materials.5.Test Specimens5.1 Test specimens shall consist of a product,in whole or inpart,for which the geometric dimensions are sought,asdescribed in a detail specification or test method.Material,asreferenced herein,shall be interpreted as the substance(
14、s)ofwhich a product is comprised.1This practice is under the jurisdiction ofASTM Committee D11 on Rubber andis the direct responsibility of Subcommittee D11.10 on Physical Testing.Current edition approved Nov.1,2014.Published December 2014.Originallyapproved in 1979.Last previous edition approved in
15、 2008 as D3767 03(2008).DOI:10.1520/D3767-03R14.2For 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 Int
16、ernational,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.Number of Measurements6.1 Unless otherwise specified in the detail specification ortest method,three measurements shall be made on each testspecimen or product and the median value taken.7.Buffing7.1 If the test specimen has uneven surfaces,such as fabricimpression or corrugations,that may interfere with the test,forexample,on the tube or cover of hose,the material may bebuffed lightly so that the surfa