ASTM_F_2838_-_10.pdf

Designation:F283810Standard Practice forAccelerated Laboratory Aging of Radial Passenger Car andLight Truck Tires through Load Range E for the LaboratoryGeneration of Belt Separation1This standard is issued under the fixed designation F2838;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 practice describes a method to laboratory age a newtire in an oven to produce changes in certain chemical andphysical properties at the belt edges similar to those of tiresin-service(see Appendix X1).1.2 This practice is a precursor to conducting an ASTMstandard roadwheel test method for laboratory generation ofbelt separation in radial passenger car and light truck tires.1.3 This practice may not produce representative chemicaland physical property changes in any part of the tire except thebelt edge.1.4 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.5 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.For specificprecautionary statements,see Section 8.2.Referenced Documents2.1 ASTM Standards:2ASTM SI10-02 IEEE/ASTM SI 10 American NationalStandard for Use of the International System of Units(SI):The Modern Metric SystemF538 Terminology Relating to the Characteristics and Per-formance of TiresG128 Guide for Control of Hazards and Risks in OxygenEnriched Systems2.2 Other Standards:ANSI/ISO/IEC 17025 General requirements for the compe-tence of testing and calibration laboratories3Compressed Gas Association(CGA)Standard for ValveConnections V-14EIGA IGA 04/09/E Fire Hazards of Oxygen and OxygenEnriched AtmospheresRMA Volume 4 Tire Service Manual5Tire and Rim Association(T&RA)Year Book6European Tyre and Rim Technical Organisation(ETRTO)Standards ManualJapan Automobile Tyre Manufacturers Association Inc.(JATMA)Year BookISO 4000 Passenger Car Tyres and Rims73.Terminology3.1 Definitions:3.1.1 age,vto apply conditions so as to promote change ofmaterial properties.3.1.1.1 DiscussionFor a tire,this can be done on aroadwheel,in a laboratory oven,in service,etc.3.1.2 aging,accelerated laboratory(also:aging,labora-tory),nincreased rate of tire material property changes underspecified conditions,including temperature,inflation pressure,oxygen concentration in the filling gas,and time.3.1.3 aging,in-service,nmaterial property changes withintires due to consumer usage.3.1.3.1 DiscussionSee Appendix X1 for more details.3.1.4 aging,oven,naccelerated laboratory aging in anelevated temperature environment.1This practice is under the jurisdiction of ASTM Committee F09 on Tires and isthe direct responsibility of Subcommittee F09.30 on Laboratory(Non-Vehicular)Testing.Current edition approved May 1,2010.Published June 2010.DOI:10.1520/F2838-10.2For 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.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from Compressed Gas Association(CGA),4221 Walney Rd.,5thFloor,Chantilly,VA 20151-2923,http:/.5Available from Rubber Manufacturers Association(RMA),1400 K St.,NW,Suite 900,Washington,DC 20005,http:/www.rma.org.6Available from Tire and RimAssociation,Inc.(TRA),175 Montrose WestAve.,Suite 150,Copley,OH 44313,http:/www.us-tra.org.7Available from International Organization for Standardization(ISO),1,ch.dela Voie-Creuse,Case postale 56,CH-1211,Geneva 20,Switzerland,http:/www.iso.ch.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.5 aging,thermal oxidative,nthe process wherebychemical and physical material properties of a tire change withexposure to heat and oxygen.3.1.6 belt,in a tire,na breaker that substantially restrictsthe carcass in a circumferential direction.F5383.1.7 belt separation,na breakdown of bonding betweenthe belts or plies or tread,or combination thereof.F5383.1.8 cold inflation pressure,nthe gauge pressure of a tire,measured after equilibration at ambient temperature.3.1.9 inflation gas,nthe specific filling medium used topressurize the tire cavity and maintain a specified gaugepressure(for example,oxygen/nitrogen gas mixture,air).3.1.10 hot inflation pressure,nthe gauge pressure of a tireafter equilibration in an oven,measured between 60 and 80min after removal from oven.3.1.11 measured inflation pressure,ngauge pressure