1、Designation:D112220Standard Test Method forDensity or Relative Density of Engine Coolant Concentratesand Engine Coolants By The Hydrometer1This standard is issued under the fixed designation D1122;the number immediately following the designation indicates the year oforiginal adoption or,in the case
2、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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This test met
3、hod covers the determination of the relativedensity of glycols,glycerin,heat transfer fluids,engine coolantconcentrates,and aqueous engine coolants.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses after SI units areprovided for information only and are
4、not considered standard.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 limit
5、ations 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 T
6、echnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1176 Practice for Sampling and Preparing Aqueous Solu-tions of Engine Coolants orAntirusts for Testing PurposesE100 Specification for ASTM HydrometersE230/E230M Specification for Temperature-ElectromotiveForce(emf)Tab
7、les for Standardized Thermocouples3.Terminology3.1 Definitions:3.1.1 relative density,nthe ratio of the density of amaterial at a stated temperature to the density of water at thesame stated temperature.4.Significance and Use4.1 The relative density of an engine coolant may be used todetermine the a
8、pproximate percent glycol,freezing point,andboiling point,provided the glycol type is known.4.2 The relative density of an engine coolant concentratecan be used as a production control test.4.3 ASTM specifications normally state the temperaturesfor relative density of fluids;25 C,20 C,and 15.6 C are
9、commonly used temperatures.5.Apparatus5.1 HydrometersHydrometers shall be of glass,graduatedin specific gravity range as listed in Table 1,and shall conformto Specification E100.5.2 Hydrometer CylinderThe hydrometer cylinder inwhich the sample for the relative density test is confined shallbe made o
10、f clear glass and shall be cylindrical in shape.Forconvenience in pouring,it may have a lip on the rim.Theinside diameter of the cylinder shall be at least 25.4 mm(1.0 in.)greater than the outside diameter of the hydrometer.The height of the cylinder shall be such that the length of thecolumn of sam
11、ple it contains is greater by at least 25.4 mm(1.0 in.)than the portion of the hydrometer which is immersedbeneath the surface of the sample after a state of equilibriumhas been reached.5.3 Temperature Measuring Instrument(environmentallysafe thermometer or thermocouple)capable of monitoring theobse
12、rved test temperature to within an accuracy of 60.05 C,Specification E230/E230M.If a liquid-in-glass thermometer isused,it shall be calibrated and graduated to 0.1 C.Thethermometer shall be calibrated at least annually against acertified and traceable standard.See Section 8,Precision andBias.The dat
13、a presented in this subsection are derived usingmercury-in-glass thermometers only.5.4 Water BathA water bath capable of maintaining asample temperature to 60.3 C(60.5 F)during the test.1This test method is under the jurisdiction of ASTM Committee D15 on EngineCoolants and Related Fluids and is the
14、direct responsibility of SubcommitteeD15.03 on Physical Properties.Current edition approved April 1,2020.Published May 2020.Originallyapproved in 1950.Last previous edition approved in 2017 as D1122-16(2017)1.DOI:10.1520/D1122-20.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orc
15、ontact 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 end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Con
16、shohocken,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.Sampling6.1 Sample the coolant in accordance with Practice D1176,except as specified in this test method.7.Procedure7.1 If the coolant has a small
