1、Designation:D134914Standard 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 number in parentheses
2、 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 and between differ
3、ent 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 describe the conditions
4、 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 shall take precede
5、nceover 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 selectionmay be made for a s
6、pecification,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,processing,or vulcaniz
7、ingof 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 testingshall take
8、 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 informationonly.1.
9、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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Terminology2.1 Def
10、initions: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 thestandard laboratory atmosphere.2.1.3 standard laboratory te
11、mperature,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 tolerance from Table 1.3.1.1 The temperatures in Table 1 ar
12、e 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.The temperature shall be recorded and reported.3.1.2 U
13、nless otherwise specified,tolerance for temperatureshall be as given in Table 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 4.3.1.1This practic
14、e is under the jurisdiction ofASTM Committee D11 on Rubber andis the direct responsibility of Subcommittee D11.10 on Physical Testing.Current edition approved July 1,2014.Published August 2014.Originallyapproved in 1954.Last previous edition approved in 2009 as D1349 09.DOI:10.1520/D1349-14.Copyrigh
15、t ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.Relative Humidity for Testing4.1 When the tolerance for temperature is 63C,the toler-ance for relative humidity shall be no greater than 50 6 15%RH(35 to 65%RH).4.2 When the tolerance for temperat
16、ure is 62C,the toler-ance for relative humidity shall be no greater than 50 6 10%RH(40 to 60%RH).4.3 When the tolerance for temperature is 61C,the toler-ance for relative humidity shall be no greater than 50 6 5%RH(45 to 55%RH).4.3.1 While a tolerance of 61C is not given in Table 1,itis used in many specifications,procedures,practices,standardsor methods and it,as well as the tolerance for relative humidity,is presented for guidance in those instances.4.4 The relative humidity ranges are not to
