ASTM_D_8015_-_15_2019.pdf

Designation:D801515(Reapproved 2019)Standard Test Method forDimensional Changes of Elastomer and Rubber MaterialsDue to Exposure to Gaseous Hydrocarbon Environments1This standard is issued under the fixed designation D8015;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 standard gives the testing procedure to determinethe change in dimensions of specimens of rubber or elasto-meric materials,or both,resulting from exposure to gaseoushydrocarbon environments.The size of the specimens is suchto facilitate preparation from as molded component configura-tions such as gaskets and seals.Where agreed to by both partiesmolded specimens may be used.Dimensional measurementsare made prior to and after conditioning in a formulated testgas.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.3 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 prior to use.1.4 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 TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1418 PracticeforRubberandRubberLaticesNomenclatureD1566 Terminology Relating to Rubber3.Terminology3.1 DefinitionsFor definitions of technical terms pertain-ing to rubber used in this specification,see TerminologyD1566.3.2 DefinitionsThe nomenclature and abbreviations usedfor natural and synthetic rubbers are in accordance withPractice D1418.3.3 Abbreviations:3.3.1 Abbreviations used in the description of natural gascomposition:3.3.2 mmscfmillion standard cubic foot3.3.3 ppmparts per million3.3.4 ppmvparts per million volume3.3.5 scfstandard cubic foot4.Summary of Test Method4.1 The dimensions for specimens prepared from elastomeror rubber samples are measured and specimens conditioned invarious gaseous environments for a given length of time.At theend of this time the specimens are again measured and thechange in dimension recorded.5.Significance and Use5.1 The information provided by this test method is usefulfor manufacturing quality control,technical service,and re-search purposes;and is required by various material specifica-tions.5.2 This method is suitable for all elastomer or rubbermaterials.6.Apparatus6.1 A device to measure the required dimensions to anaccuracy of 0.0025 mm(0.0001 in.)shall be used.This mayinclude a thermal mechanical analyzer,dilatometer,or constantcoordinate measuring machine(CMM).6.2 A cutting die capable of preparing cube shaped testspecimens with edge dimensions of 4.5 6 0.4 mm(0.177 60.016 in.)shall be used.A typical die and cutting sequence areillustrated in Fig.1.Where agreed to between parties,speci-mens may be molded.1This test method is under the jurisdiction of ASTM Committee D11 on Rubberand Rubber-like Materials and is the direct responsibility of Subcommittee D11.15on Degradation Tests.Current edition approved Nov.1,2019.Published December 2019.Originallyapproved in 2015.Last previous edition approved in 2015 as D8015 15.DOI:10.1520/D8015-15R19.2For 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 StatesThis international standard 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.6.3 A stainless steel pressure vessel of 415 kPa(60 psi)capability with the basic features as shown in Fig.2,shall beused.6.4 A needle valve for metering gas flow at a rate of 1cc/min or less,shall be used.7.Reagents and Materials7.1 A conditioning gas of known formulation shall be used.7.2 The conditioning gas composition shall be as given inTable 1 with non-methane components concentrations at 62%of the listed value and methane constituting the balance of thecomposition.Table 2 lists suggested trace constituents thatshould be present in the gas.The concentrations listed in Table2 are recommended levels and should be prepared at 610%ofthe l