ASTM_D_446_-_12_2017.pdf

Designation:D44612(Reapproved 2017)Designation:71/2/95Standard Specifications and Operating Instructions forGlass Capillary Kinematic Viscometers1This standard is issued under the fixed designation D446;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 These specifications cover operating instructions forglass capillary kinematic viscometers of all the types describedin detail in Annex A1,Annex A2,and Annex A3 as follows:Modified Ostwald viscometers,Annex A1Suspended-level viscometers,Annex A2Reverse-flow viscometers,Annex A31.2 The calibration of the viscometers is described inSection 6.1.3 This standard covers some widely used viscometerssuitable for use in accordance with Test Method D445.Otherviscometers of the glass capillary type which are capable ofmeasuring kinematic viscosity within the limits of precisiongiven in Test Method D445 may be used.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 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:2D445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids(and Calculation of Dynamic Viscos-ity)D2162 Practice for Basic Calibration of Master Viscometersand Viscosity Oil Standards2.2 ISO Documents:3ISO 3104 Petroleum ProductsTransparent and OpaqueLiquidsDetermination of Kinematic Viscosity and Cal-culation of Dynamic ViscosityISO 3105 Glass Capillary Kinematic ViscometersSpecifications and Operating InstructionsISO 5725 Basic Methods for the Determination of Repeat-ability and Reproducibility of a Standard MeasurementMethodISO 17025 General Requirements for the Competence ofTesting and Calibration LaboratoriesISO Guide 25 General Requirements for the Calibration andTesting Laboratories2.3 NIST Standards:4NIST 1297 Guidelines for Evaluating and Expressing theUncertainty of NIST Measurement Results3.Materials and Manufacture3.1 Fully annealed,low-expansion borosilicate glass shallbe used for the construction of all viscometers.The sizenumber,serial number,and manufacturers designation shall bepermanently marked on each viscometer.All timing marksshall be etched and filled with an opaque color,or otherwisemade a permanent part of the viscometer.See detailed descrip-tion of each type of viscometer in Annex A1,Annex A2,andAnnex A3.3.2 With the exception of the FitzSimons and Atlanticviscometers,all viscometers are designed to fit through a51-mm hole in the lid of a constant-temperature bath having aliquid depth of at least 280 mm;and it is assumed that thesurface of the liquid will be not more than 45 mm from the topof the bath lid.For certain constant-temperature baths,espe-cially at low or high temperatures,it may be necessary toconstruct the viscometers with the uppermost tubes longer than1These specifications and operating instructions are under the jurisdiction ofASTM Committee D02 on Petroleum Products,Liquid Fuels,and Lubricants andare the direct responsibility of Subcommittee D02.07 on Flow Properties.Current edition approved Dec.1,2017.Published December 2017.Originallyapproved in 1966 as D2515 66.Redesignated D446 in 1977.Last previous editionapproved in 2012 as D446 12.DOI:10.1520/D0446-12R17.2For 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 10036.4Available from National Institute of Standards and Technology(NIST),100Bureau Dr.,Stop 1070,Gaithersburg,MD 20899-1070,http:/www.nist.gov.Copyright 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 shown to ensure adequate immersion in the constant-temperature bath.Viscometers so modified can be used tomeasure kinematic viscosity within the precision of the testmethod.The lengths of tubes and bulbs on the figures should beheld within 610%or 610 mm,which