ASTM_D_7752_-_18.pdf

Designation:D775218Standard Practice forEvaluating Compatibility of Mixtures of Hydraulic Fluids1This standard is issued under the fixed designation D7752;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.Scope*1.1 This practice covers the compatibility of mixtures ofhydraulic fluids as defined by Specifications D6158,DIN51524,ISO 11158,and ISO 15380.1.2 This practice can be used to evaluate new(unused)lubricant compatibility or the effects of combining new(re-placement)lubricant with in-service(original)lubricant in thesystem.1.3 To evaluate primary compatibility using this method,thereplacement fluid must pass the ISO 13357-1 Stage II filter-ability test.The original fluid is not required to pass ISO13357-1 filterability test,Stage I or II.1.4 Primary testing is conducted on fluid mixtures in 2:98,10:90,and 50:50 ratios using the ISO 13357-1 FilterabilityTest,Stage II.1.5 Secondary testing is suggested when circumstancesindicate the need for additional testing.1.6 This practice does not evaluate the wear preventioncharacteristics,load carrying capacity,or the mechanical shearstability of lubricant mixtures while in service.If anti-wear(AW),extreme pressure(EP),or shear stability are to beevaluated,further testing of these parameters may be required.1.7 This practice does not purport to cover all test methodsthat could be employed.1.8 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.9 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.10 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:2D130 Test Method for Corrosiveness to Copper from Petro-leum Products by Copper Strip TestD445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids(and Calculation of Dynamic Viscos-ity)D664 Test Method for Acid Number of Petroleum Productsby Potentiometric TitrationD665 Test Method for Rust-Preventing Characteristics ofInhibited Mineral Oil in the Presence of WaterD892 Test Method for Foaming Characteristics of Lubricat-ing OilsD974 Test Method for Acid and Base Number by Color-Indicator TitrationD1401 Test Method for Water Separability of Petroleum Oilsand Synthetic FluidsD2270 Practice for Calculating Viscosity Index from Kine-matic Viscosity at 40 C and 100 CD3427 Test Method for Air Release Properties of Hydrocar-bon Based OilsD6158 Specification for Mineral Hydraulic OilsD7042 Test Method for Dynamic Viscosity and Density ofLiquids by Stabinger Viscometer(and the Calculation ofKinematic Viscosity)2.2 ISO Standards:311158:2009 Lubricants,industrial oils and related products(class L)Family H(hydraulic systems)Specificationsfor categories HH,HL,HM,HR,HV and HG13357-1:2002(E)Petroleum ProductsDetermination of thefilterability of lubricating oilsPart 1:Procedure for oilsin the presence of water13357-2:2005(E)Petroleum ProductsDetermination of the1This practice is under the jurisdiction of ASTM Committee D02 on PetroleumProducts,Liquid Fuels,and Lubricants and is the direct responsibility of Subcom-mittee D02.N0 on Hydraulic Fluids.Current edition approved March 1,2018.Published March 2018.Originallyapproved in 2011.Last previous edition approved in 2011 as D7752 11.DOI:10.1520/D7752-18.2For 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.*A Summary of Changes section appears at the 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.1 filterability of lubricating oilsPart 2:Procedure for dryoils15380:2011 Lubricants,industrial oils and related products(class L)Family H(Hydrauli