ASTM D2161-05e1

Standard Practice for Conversion of Kinematic Viscosity to Saybolt Universal Viscosity or to Saybolt Furol Viscosity

SIGNIFICANCE AND USE
At one time the petroleum industry relied on measuring kinematic viscosity by means of the Saybolt viscometer, and expressing kinematic viscosity in units of Saybolt Universal Seconds (SUS) and Saybolt Furol Seconds (SFS). This practice is now obsolete in the petroleum industry.
This practice establishes the official equations relating SUS and SFS to the SI kinematic viscosity units, mm2/s.  
This practice allows for the conversion between SUS and SFS units and SI units of kinematic viscosity.
SCOPE
1.1 This practice covers the conversion tables and equations for converting kinematic viscosity in mm2/s at any temperature to Saybolt Universal viscosity in Saybolt Universal seconds (SUS) at the same temperature and for converting kinematic viscosity in mm2/s at 122 and 210°F (50 and 98.9°C) to Saybolt Furol viscosity in Saybolt Furol seconds (SFS) at the same temperatures. Kinematic viscosity values are based on water being 1.0034 mm2/s (cSt) at 68°F (20°C).
Note 1—A fundamental and preferred method for measuring kinematic viscosity is by use of kinematic viscometers as outlined in Test Method D 445. It is recommended that kinematic viscosity be reported in millimetres squared per second, instead of Saybolt Universal Seconds (SUS) or Saybolt Furol Seconds (SFS). This method is being retained for the purpose of calculation of kinematic viscosities from SUS and SFS data that appear in past literature. One millimetre squared per second (mm2/s) equals one centistoke (cSt), which is another unit commonly found in older literature.  
1.2 The SI unit of kinematic viscosity, mm2/s, and temperature in degrees Fahrenheit are the standard in this practice.

General Information

• Status: Historical
• Publication Date: 31-Mar-2005
• ICS: 17.060 - Measurement of volume, mass, density, viscosity
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.07 - Flow Properties

Relations

• Replaces: ASTM D2161-05 - Standard Practice for Conversion of Kinematic Viscosity to Saybolt Universal Viscosity or to Saybolt Furol Viscosity
• Effective Date: 01-Apr-2005
• Replaced By: ASTM D2161-10 - Standard Practice for Conversion of Kinematic Viscosity to Saybolt Universal Viscosity or to Saybolt Furol Viscosity
• Effective Date: 01-Oct-2010
• Referred By: ASTM D4731-13(2020) - Standard Specification for Hot-Application Filling Compounds for Telecommunications Wire and Cable
• Effective Date: 01-Apr-2005
• Referred By: ASTM D4732-13(2020) - Standard Specification for Cool-Application Filling Compounds for Telecommunications Wire and Cable
• Effective Date: 01-Apr-2005
• Referred By: ASTM D88/D88M-07(2019)e1 - Standard Test Method for Saybolt Viscosity
• Effective Date: 01-Apr-2005
• Referred By: ASTM D117-22 - Standard Guide for Sampling, Test Methods, and Specifications for Electrical Insulating Liquids
• Effective Date: 01-Apr-2005
• Referred By: ASTM D6074-15(2022) - Standard Guide for Characterizing Hydrocarbon Lubricant Base Oils
• Effective Date: 01-Apr-2005
• Referred By: ASTM D8046-21 - Standard Guide for Pumpability of Heat Transfer Fluids
• Effective Date: 01-Apr-2005

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
´1
Designation:D2161–05
Standard Practice for
Conversion of Kinematic Viscosity to Saybolt Universal
1
Viscosity or to Saybolt Furol Viscosity
This standard is issued under the fixed designation D2161; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number 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 Department of Defense.
1 2
´ NOTE—Corrected SFS at 122°F for Kin Vis of 491 mm /s in Table 3 editorially in October 2008.
4
1. Scope* 2.2 ASTM Adjunct:
2 ADJD2161 Viscosity Extrapolation Tables to Zero Degrees
1.1 This practice covers the conversion tables and equa-
2
Fahrenheit (SSU)
tions for converting kinematic viscosity in mm /s at any
temperature to Saybolt Universal viscosity in Saybolt Univer-
3. Summary of Practice
sal seconds (SUS) at the same temperature and for converting
2
3.1 The Saybolt Universal viscosity equivalent to a given
kinematicviscosityinmm /sat122and210°F(50and98.9°C)
kinematic viscosity varies with the temperature at which the
toSayboltFurolviscosityinSayboltFurolseconds(SFS)atthe
determination is made. The basic conversion values are those
same temperatures. Kinematic viscosity values are based on
2
given in Table 1 for 100°F. The Saybolt Universal viscosity
water being 1.0034 mm /s (cSt) at 68°F (20°C).
equivalent to a given kinematic viscosity at any temperature
NOTE 1—Afundamentalandpreferredmethodformeasuringkinematic
may be calculated as described in 4.3. Equivalent values at
viscosity is by use of kinematic viscometers as outlined in Test Method
210°F are given in Table 1 for convenience.
D445. It is recommended that kinematic viscosity be reported in millime-
3.2 The Saybolt Furol viscosity equivalents are tabulated in
tres squared per second, instead of Saybolt Universal Seconds (SUS) or
Table 3 for temperatures of 122°F and 210°F only.
Saybolt Furol Seconds (SFS). This method is being retained for the
3.3 ExamplesforusingthetablesaregiveninAppendixX1.
purpose of calculation of kinematic viscosities from SUS and SFS data
2
that appear in past literature. One millimetre squared per second (mm /s)
4. Significance and Use
equals one centistoke (cSt), which is another unit commonly found in
older literature.
4.1 At one time the petroleum industry relied on measuring
2
kinematic viscosity by means of the Saybolt viscometer, and
1.2 The SI unit of kinematic viscosity, mm /s, and tempera-
ture in degrees Fahrenheit are the standard in this practice. expressing kinematic viscosity in units of Saybolt Universal
Seconds(SUS)andSayboltFurolSeconds(SFS).Thispractice
2. Referenced Documents
is now obsolete in the petroleum industry.
3
2.1 ASTM Standards: 4.2 This practice establishes the official equations relating
2
D445 Test Method for Kinematic Viscosity of Transparent SUS and SFS to the SI kinematic viscosity units, mm /s.
and Opaque Liquids (and Calculation of Dynamic Viscos- 4.3 This practice allows for the conversion between SUS
ity) and SFS units and SI units of kinematic viscosity.
D2270 Practice for Calculating Viscosity Index from Kine-
5. Procedure for Conversion to Saybolt Universal
matic Viscosity at 40 and 100°C
Viscosity
5.1 Convert kinematic viscosities between 1.81 and 500
1
This practice is under the jurisdiction of ASTM Committee D02 on Petroleum 2 2
mm /s (cSt) at 100°F, and between 1.77 and 139.8 mm /s (cSt)
Products and Lubricants and is the direct responsibility of Subcommittee D02.07 on
at210°F,toequivalentSayboltUniversalsecondsdirectlyfrom
Flow Properties.
Current edition approved April 1, 2005. Published April 2005. Originally
Table 1 (see Appendix X1, Example 1).
approved in 1963, replacing former D446 and D666. Last previous edition approved
´2
NOTE 2—Obtain viscosities not listed, but which are within the range
in 1999 as D2161 – 93 (1999) . DOI: 10.1520/D2161-05E01.
2
This practice, together with Practice D2270, replaces Compilation of ASTM given in Table 1, by linear interpolation (see Appendix X1, Example 2).
Viscosity Tables for Kinematic Viscosity Conversions.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
4
Standards volume information, refer to the standard’s Document Summary page on Available from ASTM International Headquarters. Order Adjunct No.
the ASTM website. ADJD2161. Original adjunct produced in 1998.
*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.
1

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This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
An American National Standard
´1
Designation:D2161 –04 Designation: D 2161 – 05
Standard Practice for
Conversion of Kinematic Viscosity to Saybolt Universal
1
Viscosity or to Saybolt Furol Viscosity
This standard is issued under the fixed designation D 2161; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number 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 Department of Defense.
1 2
´ NOTE—Corrected SFS at 122°F for Kin Vis of 491 mm /s in Table 3 editorially in October 2008.
1. Scope*
2
2
1.1 This practice covers the conversion tables and equations for converting kinematic viscosity in mm /s at any temperature
to Saybolt Universal viscosity in Saybolt Universal seconds (SUS) at the same temperature and for converting kinematic viscosity
2
in mm /s/s at 122 and 210°F (50 and 98.9°C) to Saybolt Furol viscosity in Saybolt Furol seconds (SFS) at the same
2
temperatures. Kinematic viscosity values are based on water being 1.0034 mm /s (cSt) at 68°F (20°C).
NOTE 1—Afundamental and preferred method for measuring kinematic viscosity is by use of kinematic viscometers as outlined inTest Method D 445.
. It is recommended that kinematic viscosity be reported in millimetres squared per second, instead of Saybolt Universal
Itisrecommendedthatkinematicviscositybereportedinmm
Seconds(SUS)orSayboltFurolSeconds(SFS).ThismethodisbeingretainedforthepurposeofcalculationofkinematicviscositiesfromSUSandSFSdatathatappearinpastliterature.Onemillimetre
2
squared per second (mm /s , instead of Saybolt Universal Seconds (SUS) or Saybolt Furol Seconds (SFS). This method is being retained for the purpose
2
of calculation of kinematic viscosities from SUS and SFS data which appear in past literature. One millimetre squared per second (mm /s) equals
one centistoke (cSt), which is another unit comonly found in older literature. /s) equals one centistoke (cSt), which is another unit commonly found in
older literature.
2
1.2 The SI unit of kinematic viscosity, mm /s, and temperature in degrees Fahrenheit are the standard in this practice.
2. Referenced Documents
3
2.1 ASTM Standards:
D445Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and the Calculation of Dynamic Viscosity)
D 2270Practice for Calculating Viscosity Index from Kinematic Viscosity at 40 and 100°C 445 Test Method for Kinematic
Viscosity of Transparent and Opague Liquids
D 2270 Practice for Calculating Viscosity Index from Kinematic Viscosity at 40 and 100°C
2.2 ASTM Adjunct:
ADJD2161 Viscosity Extrapolation Tables to Zero Degrees Fahrenheit (SSU)
3. Summary of Practice
3.1 The Saybolt Universal viscosity equivalent to a given kinematic viscosity varies with the temperature at which the
determination is made. The basic conversion values are those given in Table 1 for 100°F. The Saybolt Universal viscosity
equivalent to a given kinematic viscosity at any temperature may be calculated as described in 4.3. Equivalent values at 210°F are
given in Table 1 for convenience.
3.2 The Saybolt Furol viscosity equivalents are tabulated in Table 3 for temperatures of 122°F and 210°F only.
3.3 Examples for using the tables are given in Appendix X1.
4. Significance and Use
4.1 At one time the petroleum industry relied on measuring kinematic viscosity by means of the Saybolt viscometer, and
expressing kinematic viscosity in units of Saybolt Universal, Seconds (SUS) and Saybolt Furol Seconds (SFS). This practice is
now obsolete in the petroleum industry.
1
This practice is under the jurisdiction ofASTM Committee D02 on Petroleum Products and Lubricants and is the direct responsibility of Subcommittee D02.07 on Flow
Properties.
Current edition approved Dec.April 1, 2004.2005. Published JanuaryApril 2005. Originally approved in 1963, replacing former D 446 and D 666. Last previous edition
´2
approved in 1999 as D 2161 – 93 (1999) .
2
This practice, together with Practice D 2270, replaces Compilation of ASTM Viscosity Tables for Kinematic Viscosity Conversions.
3
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book ofASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard.
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