ASTM D446-12

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Designation:D446 −12
Designation: 71/2/95
Standard Specifications and Operating Instructions for
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Glass Capillary Kinematic Viscometers
This standard is issued under the fixed designation D446; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript 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* ISO 3105 Glass Capillary Kinematic Viscometers—
Specifications and Operating Instructions
1.1 These specifications cover operating instructions for
ISO5725Basic Methods for the Determination of Repeat-
glasscapillarykinematicviscometersofallthetypesdescribed
ability and Reproducibility of a Standard Measurement
in detail in Annex A1, Annex A2, and Annex A3 as follows:
Method
Modified Ostwald viscometers, Annex A1
ISO17025General Requirements for the Competence of
Suspended-level viscometers, Annex A2
Reverse-flow viscometers, Annex A3 Testing and Calibration Laboratories
ISO Guide25General Requirements for the Calibration and
1.2 The calibration of the viscometers is described in
Testing Laboratories
Section 6.
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2.3 NIST Standards:
1.3 This standard covers some widely used viscometers
NIST1297Guidelines for Evaluating and Expressing the
suitable for use in accordance with Test Method D445. Other
Uncertainty of NIST Measurement Results
viscometers of the glass capillary type which are capable of
measuring kinematic viscosity within the limits of precision
3. Materials and Manufacture
given in Test Method D445 may be used.
3.1 Fully annealed, low-expansion borosilicate glass shall
1.4 The values stated in SI units are to be regarded as
be used for the construction of all viscometers. The size
standard. No other units of measurement are included in this
number,serialnumber,andmanufacturer’sdesignationshallbe
standard.
permanently marked on each viscometer. All timing marks
shall be etched and filled with an opaque color, or otherwise
2. Referenced Documents
made a permanent part of the viscometer. See detailed descrip-
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2.1 ASTM Standards:
tion of each type of viscometer in Annex A1, Annex A2, and
D445Test Method for Kinematic Viscosity of Transparent
Annex A3.
and Opaque Liquids (and Calculation of DynamicViscos-
3.2 With the exception of the FitzSimons and Atlantic
ity)
viscometers, all viscometers are designed to fit through a
D2162Practice for Basic Calibration of MasterViscometers
51-mm hole in the lid of a constant-temperature bath having a
and Viscosity Oil Standards
3 liquid depth of at least 280 mm; and it is assumed that the
2.2 ISO Documents:
surfaceoftheliquidwillbenotmorethan45mmfromthetop
ISO 3104Petroleum Products—Transparent and Opaque
of the bath lid. For certain constant-temperature baths, espe-
Liquids—Determination of Kinematic Viscosity and Cal-
cially at low or high temperatures, it may be necessary to
culation of Dynamic Viscosity
constructtheviscometerswiththeuppermosttubeslongerthan
shown to ensure adequate immersion in the constant-
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These specifications and operating instructions are under the jurisdiction of
temperature bath. Viscometers so modified can be used to
ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and
measure kinematic viscosity within the precision of the test
are the direct responsibility of Subcommittee D02.07 on Flow Properties.
method.Thelengthsoftubesandbulbsonthefiguresshouldbe
Current edition approved Dec. 1, 2012. Published March 2013. Originally
held within 610% or 610 mm, whichever is less, such that
approvedin1966asD2515–66.RedesignatedD446in1977.Lastpreviousedition
approved in 2007 as D446–07. DOI: 10.1520/D0446-12.
the calibration constant of the viscometer does not vary by
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
more than 615% from the nominal value.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3 4
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St., Available from National Institute of Standards and Technology (NIST), 100
4th Floor, New York, NY 10036. Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http://www.nist.gov.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D446−12
4. Nomenclature for Figures eter which is to be calibrated in order that the kinetic energy
correction (see 7.1 and 7.2) may be less than 0.2%.
4.1 The
...