1、Designation:D44612Designation: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
2、,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 These specifications cov
3、er 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 desc
4、ribed 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 value
5、s stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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
6、 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
7、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 Guidel
8、ines 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 ea
9、ch 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
10、 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 temperature
11、s,it may be necessary toconstruct the viscometers with the uppermost tubes longer thanshown 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 fig
12、ures should beheld within 610%or 610 mm,whichever is less,such thatthe calibration constant of the viscometer does not vary bymore than 615%from the nominal value.1These specifications and operating instructions are under the jurisdiction ofASTM Committee D02 on Petroleum Products,Liquid Fuels,and L
13、ubricants andare the direct responsibility of Subcommittee D02.07 on Flow Properties.Current edition approved Dec.1,2012.Published March 2013.Originallyapproved in 1966 as D2515 66.Redesignated D446 in 1977.Last previous editionapproved in 2007 as D446 07.DOI:10.1520/D0446-12.2For referenced ASTM st
14、andards,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 Y
15、ork,NY 10036.4Available from National Institute of Standards and Technology(NIST),100Bureau Dr.,Stop 1070,Gaithersburg,MD 20899-1070,http:/www.nist.gov.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA
16、 19428-2959.United States1 4.Nomenclature for Figures4.1 The figures in the annexes contain letters to designatespecific parts of each viscometer.These letters are also used inthe text of the standard when reference to the viscometers isgiven.The more frequently used letters on the figures in theannexes are as follows:Alower reservoirBsuspended levelbulbC and Jtiming bulbsDupper reservoirE,F,and Itiming marksG and Hfilling marksKoverflow tubeLmounting tubeMlower vent tubeNupper vent tubePconnect
