SASO 2253-2004 Motor Vehicle Tires Temperature Resistance Grading

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1、SASO2253MOTORVEHICLETIRESMETHODOFTESTINGOFTIRETEMPERATURERESISTANCEGRADINGMOTORVEHICLETIRESMETHODOFTESTINGOFTIRETEMPERATURERESISTANCEGRADINGICS:DateofSASOBoardofDirectors’Approval:DateofPublicationintheOfficialGazette:DateofEnforcementofthisStandard:SAUDIARABIANSTANDAR

2、DSASO2253/2004MOTORVEHICLETIRESMETHODOFTESTINGOFTIRETEMPERATURERESISTANCEGRADING1-SCOPEANDFIELDOFAPPLICATIONThisstandardisconcernedwiththemethodsoftestingoftiresfortemperatureresistancegrading.2-COMPLEMENTARYREFERENCES2.1SASO...../....“MotorVehiclesTyres-Treadwear,Trac

3、tionandTemperatureResistanceGrading”.2.2SASO...../....“MotorVehiclesTyres-“MethodsofTestingofTireTreadwear”.2.3SASO...../....“MotorVehiclesTyres-“MethodsofTestingofTireTractionGrading”.3-VISUALINSPECTIONTyresshallbevisuallyinspectedtocheckthefollowing:3.1Theabsenceofan

4、ycracksorcutsinthetreadoroneithersidewalls,andensureitisfreefromanymetalpieces,gravelorotherforeignmatterpinchedorstuckinthetyre.3.2Informationmarkedonthetyresuchastreadweargrade,tractionandtemperaturegrade.3.3Dateofmanufacture.3.4Countryofmanufacture.4-MEASURINGINSTRU

5、MENTS4.1Timemeasuringinstruments:Itshallpermitmeasurementsoftimetoanaccuracyof(±0.001)second.4.2Temperaturemeasuringinstruments:oItshallpermitmeasurementsoftemperaturetoanaccuracyof(±1C).4.3Pressuremeasuringinstruments:Pressuredialgaugestoanaccuracyof±2kPa.1SAUDIARABIA

6、NSTANDARDSASO2253/20045-TEMPERATURERESISTANCEGRADING5.1Preparationoftyre5.1.1ThetyreshallbemountedontherimandinflateittotheapplicablepressurespecifiedinTable1shownbelow.5.1.2Thetyreandtherimassemblyshallbeconditionedforatleast3hoursinaoroomwherethetemperatureisnotlesst

7、han38C.5.1.3Thetyrepressureshallbeadjustedagaintotheapplicableinflationpressurespecifiedinthetable1.5.2Apparatus5.2.1Aflat-facedsteeldrumindiameterandatleastthesamewidthasthesectionwidthofthetiretobetested.o5.2.2Atestroomcontrolledatatemperaturenotlessthan38Cduringthet

8、estperiod.5.2.3Temperaturesensors.5.3Procedure5.3.1Thetyrerimassemblyshallbemountedonthetestaxle.TABLE(1)TestInflatio