1、Designation:D134914(Reapproved 2019)Standard Practice forRubberStandard Conditions for Testing1This standard is issued under the fixed designation D1349;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A numb
2、er in 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 Reliable comparisons between different rubber com-pounds a
3、nd between different laboratories is an essentialcomponent of effective testing.1.2 It is necessary to standardize the temperature andhumidity conditions to which materials are subjected prior toand during testing.1.3 Section 2 of this practice includes the definition of termscommonly used to descri
4、be the conditions of testing.1.4 Section 3 of this practice covers a list of standard testtemperatures for testing from which selection may be made fora specification,procedure,practice,standard or method.1.4.1 Any specification,procedure,practice,standard ormethod that specifies test temperatures s
5、hall take precedenceover this practice.1.4.2 The standard test temperatures for testing do not applyto preparation,mixing,processing,or vulcanizing temperaturesfor rubber compounds.1.5 Section 4 of this practice covers a list of standardrelative humidity conditions for testing from which selectionma
6、y be made for a specification,procedure,practice,standardor method.1.5.1 Any specification,procedure,practice,standard ormethod that specifies relative humidity shall take precedenceover this practice.1.5.2 The standard relative humidity conditions for testingdo not apply to preparation,mixing,proce
7、ssing,or vulcanizingof rubber compounds,but may serve as a guide when thecondition is not specified.1.6 Section 5 of this practice covers the standard condition-ing of materials for testing.1.6.1 Any specification,procedure,practice,standard ormethod that specifies the conditioning of materials for
8、testingshall take precedence over this practice.1.7 Section 6 of this practice includes the keywords associ-ated with this document which may be used in standarddocument or internet searches.1.8 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for i
9、nformationonly.1.9 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-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations pr
10、ior to use.1.10 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization Technical
11、Barriers to Trade(TBT)Committee.2.Terminology2.1 Definitions:2.1.1 room temperature,na temperature in the range from20 to 30C(68 to 86F).2.1.2 standard laboratory atmosphere,nan atmospherehaving a temperature of 23 6 2C(73.4 6 3.6F)and a relativehumidity of 50 6 10%RH(40 to 60%RH)shall be thestandar
12、d laboratory atmosphere.2.1.3 standard laboratory temperature,na temperature of23 6 2C(73.4 6 3.6F)shall be the standard laboratorytemperature.3.Temperatures for Testing3.1 When data are to be obtained for comparison purposesat a specific temperature,select the test temperature andassociated toleran
13、ce from Table 1.3.1.1 The temperatures in Table 1 are not to be consideredexclusive.If agreed upon between customer and supplier,temperatures within the range shown in Table 1 may beemployed,that is,where 195C was found to be a desiredtemperature for testing,it would be used with a 62.0Ctolerance.Th
14、e temperature shall be recorded and reported.3.1.2 Unless otherwise specified,tolerance for temperatureshall be as given in Table 1.1This practice is under the jurisdiction ofASTM Committee D11 on Rubber andRubber-like Materials and is the direct responsibility of Subcommittee D11.10 onPhysical Test
15、ing.Current edition approved Nov.1,2019.Published December 2019.Originallyapproved in 1954.Last previous edition approved in 2014 as D1349 14.DOI:10.1520/D1349-14R19.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standar
16、d was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 3.1.3 A tolerance of 61C(61.8F)or less,may berequired by a specification,procedure,practice,standard ormethod,or as agreed upon between customer and supplier andshall be recorded and reported.Refer to 4.3.1.4.R