1、Designation:D742222Standard Test Method forEvaluation of Diesel Engine Oils in T-12 Exhaust GasRecirculation Diesel Engine1This standard is issued under the fixed designation D7422;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the
2、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.Scope*1.1 This test method covers an engine test procedure forevaluating diesel engine oils for performance characteristics,
3、including lead corrosion and wear of piston rings and cylinderliners in an engine equipped with exhaust gas recirculation andrunning on ultra-low sulfur diesel fuel.2This test method iscommonly referred to as the Mack T-12.1.1.1 This test method also provides the procedure forrunning an abbreviated
4、length test,which is commonly referredto as the T-12A.The procedures for the T-12 and T-12A areidentical with the exception of the items specifically listed inAnnex A9.Additionally,the procedure modifications listed inAnnex A9 refer to the corresponding section of the T-12procedure.1.2 The values st
5、ated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.2.1 ExceptionWhere there is no direct SI equivalent,such as the units for screw threads,National Pipe Threads/diameters,tubing size,and single source supply equipmentspecifications.1.3 This st
6、andard 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.See Annex A6 fo
7、r specific safety precautions.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 Orga
8、nization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3D86 Test Method for Distillation of Petroleum Products andLiquid Fuels at Atmospheric PressureD93 Test Methods for Flash Point by Pensky-MartensClosed Cup TesterD97 Test Method for Pour Point of Petroleum Pro
9、ductsD130 Test Method for Corrosiveness to Copper from Petro-leum Products by Copper Strip TestD235 Specification for Mineral Spirits(Petroleum Spirits)(Hydrocarbon Dry Cleaning Solvent)D287 Test Method for API Gravity of Crude Petroleum andPetroleum Products(Hydrometer Method)D445 Test Method for K
10、inematic Viscosity of Transparentand Opaque Liquids(and Calculation of Dynamic Viscos-ity)D482 Test Method for Ash from Petroleum ProductsD524 Test Method for Ramsbottom Carbon Residue ofPetroleum ProductsD613 Test Method for Cetane Number of Diesel Fuel OilD664 Test Method for Acid Number of Petrol
11、eum Productsby Potentiometric TitrationD976 Test Method for Calculated Cetane Index of DistillateFuelsD1319 Test Method for Hydrocarbon Types in Liquid Petro-leum Products by Fluorescent Indicator AdsorptionD2274 Test Method for Oxidation Stability of Distillate FuelOil(Accelerated Method)D2500 Test
12、 Method for Cloud Point of Petroleum Productsand Liquid FuelsD2622 Test Method for Sulfur in Petroleum Products byWavelength Dispersive X-ray Fluorescence SpectrometryD2709 Test Method for Water and Sediment in MiddleDistillate Fuels by Centrifuge1This test method is under the jurisdiction of ASTM C
13、ommittee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.B0 on Automotive Lubricants.Current edition approved April 1,2022.Published April 2022.Originallyapproved in 2008.Last previous edition approved in 2019 as D7422 19.DOI:10.1520/D7422-22.
14、2The ASTM Test Monitoring Center will update changes in this test method bymeans of Information Letters.Information letters may be obtained from the ASTMTestMonitoringCenter,203ArmstrongDrive,Freeport,PA16229,www.astmtmc.org,Attention:Director.This edition incorporates revisions in allInformation Le
15、tters through No.21-1.3For 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.*A Summary of Changes section appears at the
16、 end of this standardCopyright 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.1D3338 Test Method for Estimation of Net Heat of Combus-t
