ASTM D2161-17

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

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.  
4.2 This practice establishes the official equations relating SUS and SFS to the SI kinematic viscosity units, mm2/s.  
4.3 This practice allows for the conversion between SUS and SFS units and SI units of kinematic viscosity.
SCOPE
1.1 This practice2 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 °F and 210 °F (50 °C 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 D445. Kinematic viscosity results from Test Method D7042 may be used provided they are bias-corrected by the application of the correction described in Test Method D7042 for the specific sample type. In case of dispute, Test Method D445 shall be the referee method. 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 values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for reference information purposes only. The SI unit of kinematic viscosity is mm2/s.  
1.2.1 Exception—Fahrenheit temperature units are used in this practice because they are accepted by industry for the type of legacy conversions described in this practice.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Historical
• Publication Date: 30-Jun-2017
• ICS: 17.060 - Measurement of volume, mass, density, viscosity
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.07 - Flow Properties

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
Designation: D2161 − 17
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.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* 1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
2
1.1 This practice covers the conversion tables and equa-
2 ization established in the Decision on Principles for the
tions for converting kinematic viscosity in mm /s at any
Development of International Standards, Guides and Recom-
temperature to Saybolt Universal viscosity in Saybolt Univer-
mendations issued by the World Trade Organization Technical
sal seconds (SUS) at the same temperature and for converting
Barriers to Trade (TBT) Committee.
2
kinematic viscosity in mm /s at 122°F and 210°F (50°C and
98.9°C) to Saybolt Furol viscosity in Saybolt Furol seconds
2. Referenced Documents
(SFS)atthesametemperatures.Kinematicviscosityvaluesare
2
3
based on water being 1.0034mm /s (cSt) at 68°F (20°C).
2.1 ASTM Standards:
D445Test Method for Kinematic Viscosity of Transparent
NOTE1—Afundamentalandpreferredmethodformeasuringkinematic
and Opaque Liquids (and Calculation of DynamicViscos-
viscosity is by use of kinematic viscometers as outlined in Test Method
ity)
D445. Kinematic viscosity results from Test Method D7042 may be used
provided they are bias-corrected by the application of the correction
D2270Practice for Calculating Viscosity Index from Kine-
described in Test Method D7042 for the specific sample type. In case of
matic Viscosity at 40°C and 100°C
dispute,TestMethodD445shallbetherefereemethod.Itisrecommended
D7042Test Method for Dynamic Viscosity and Density of
that kinematic viscosity be reported in millimetres squared per second,
Liquids by Stabinger Viscometer (and the Calculation of
instead of Saybolt Universal Seconds (SUS) or Saybolt Furol Seconds
Kinematic Viscosity)
(SFS). This method is being retained for the purpose of calculation of
kinematicviscositiesfromSUSandSFSdatathatappearinpastliterature.
4
2 2.2 ASTM Adjunct:
One millimetre squared per second (mm /s) equals one centistoke (cSt),
ADJD2161Viscosity Extrapolation Tables to Zero Degrees
which is another unit commonly found in older literature.
Fahrenheit (SSU)
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are provided for
3. Summary of Practice
reference information purposes only. The SI unit of kinematic
2
viscosity is mm /s. 3.1 The Saybolt Universal viscosity equivalent to a given
1.2.1 Exception—Fahrenheit temperature units are used in kinematic viscosity varies with the temperature at which the
determination is made. The basic conversion values are those
this practice because they are accepted by industry for the type
of legacy conversions described in this practice. given in Table 1 for 100°F. The Saybolt Universal viscosity
equivalent to a given kinematic viscosity at any temperature
1.3 This standard does not purport to address all of the
may be calculated as described in 4.3. Equivalent values at
safety concerns, if any, associated with its use. It is the
210°F are given in Table 1 for convenience.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
3.2 The Saybolt Furol viscosity equivalents are tabulated in
bility of regulatory limitations prior to use.
Table 3 for temperatures of 122°F and 210°F only.
3.3 ExamplesforusingthetablesaregiveninAppendixX1.
1
This practice is under the jurisdiction ofASTM Committee D02 on Petroleum
Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcom-
3
mittee D02.07 on Flow Properties. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
CurrenteditionapprovedJuly1,2017.PublishedJuly2017.Originallyapproved contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
in 1963, replacing former D446 and D666. Last previous edition approved in 2016 Standards volume information, refer to the standard’s Document Summary page on
as D2161 – 10 (2016). DOI: 10.1520/D2161-17. the ASTM website.
2 4
This practice, together with Practice D2270, replaces Compilation of ASTM Available from ASTM International Headquarters. Order Adjunct No.
Viscosity Tables for Kinematic Viscosity Conversions. ADJD2161. Original adjunct produced in 1998.
*A Summary of Changes
...

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.
Designation: D2161 − 10 (Reapproved 2016) D2161 − 17
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 U.S. Department of Defense.
1. Scope 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 at 122 °F and 210 °F (50 °C 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—A fundamental and preferred method for measuring kinematic viscosity is by use of kinematic viscometers as outlined in Test Method D445.
Kinematic viscosity results from Test Method D7042 may be used provided they are bias-corrected by the application of the correction described in Test
Method D7042 for the specific sample type. In case of dispute, Test Method D445. shall be the referee method. 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
2
for the purpose of calculation of kinematic viscosities from SUS and SFS data that appear in past literature. One millimetre squared per second (mm /s)
equals one centistoke (cSt), which is another unit commonly found in older literature.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for reference
2
information purposes only. The SI unit of kinematic viscosity is mm /s.
1.2.1 Exception—Fahrenheit temperature units are used in this practice because they are accepted by industry for the type of
legacy conversions described in this practice.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
3
2.1 ASTM Standards:
D445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)
D2270 Practice for Calculating Viscosity Index from Kinematic Viscosity at 40 °C and 100 °C
D7042 Test Method for Dynamic Viscosity and Density of Liquids by Stabinger Viscometer (and the Calculation of Kinematic
Viscosity)
4
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.
1
This practice is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.07 on Flow Properties.
Current edition approved July 1, 2016July 1, 2017. Published July 2016July 2017. Originally approved in 1963, replacing former D446 and D666. Last previous edition
ɛ1
approved in 20102016 as D2161 – 10 . (2016). DOI: 10.1520/D2161-10R16.10.1520/D2161-17.
2
This practice, together with Practice D2270, replaces Compilation of ASTM 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 A
...