Standard Practice for Viscosity-Temperature Charts for Liquid Petroleum Products

ABSTRACT
This test method details the standard procedure for plotting viscosity-temperature charts that ascertain the kinematic viscosity of a petroleum oil or liquid hydrocarbon at any temperature within a limited range, provided that the kinematic viscosities at two temperatures are known.
SCOPE
1.1 This practice covers kinematic viscosity-temperature charts (see Figs. 1 and 2), which are a convenient means to ascertain the kinematic viscosity of a petroleum oil or liquid hydrocarbon at any temperature within a limited range, provided that the kinematic viscosities at two temperatures are known.
FIG. 1 Facsimile of Kinematic Viscosity-Temperature Chart I High Range (Temperature in degrees Celsius)  
FIG. 2 Facsimile of Kinematic Viscosity-Temperature Chart II Low Range (Temperature in degrees Celsius)  
1.2 The charts are designed to permit petroleum oil kinematic viscosity-temperature data to plot as a straight line. The charts here presented provide a significant improvement in linearity over the charts previously available under Method D341–43. This increases the reliability of extrapolation to higher temperatures.  
1.3 The values provided in SI units are to be regarded as standard.  
1.3.1 Exception—The values given in parentheses are provided for information only.  
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.

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D341 − 17
Standard Practice for
Viscosity-Temperature Charts for Liquid Petroleum
1
Products
This standard is issued under the fixed designation D341; 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* D445Test Method for Kinematic Viscosity of Transparent
and Opaque Liquids (and Calculation of DynamicViscos-
1.1 This practice covers kinematic viscosity-temperature
ity)
charts (see Figs. 1 and 2), which are a convenient means to
D7042Test Method for Dynamic Viscosity and Density of
ascertain the kinematic viscosity of a petroleum oil or liquid
Liquids by Stabinger Viscometer (and the Calculation of
hydrocarbon at any temperature within a limited range, pro-
Kinematic Viscosity)
vided that the kinematic viscosities at two temperatures are
3
known.
2.2 ASTM Adjuncts:
1.2 The charts are designed to permit petroleum oil kine- Viscosity-Temperature Charts 1–7
matic viscosity-temperature data to plot as a straight line. The
charts here presented provide a significant improvement in
3. Technical Hazard
linearity over the charts previously available under Method
3.1 Warning—Thechartsshouldbeusedonlyinthatrange
D341–43. This increases the reliability of extrapolation to
inwhichthehydrocarbonorpetroleumfluidsarehomogeneous
higher temperatures.
liquids.The suggested range is thus between the cloud point at
1.3 The values provided in SI units are to be regarded as
low temperatures and the initial boiling point at higher tem-
standard.
peratures. The charts provide improved linearity in both low
1.3.1 Exception—The values given in parentheses are pro-
kinematicviscosityandattemperaturesupto340°C(approxi-
vided for information only.
mately 650°F) or higher. Some high-boiling point materials
1.4 This international standard was developed in accor-
can show a small deviation from a straight line as low as
dance with internationally recognized principles on standard-
280°C (approximately 550°F), depending on the individual
ization established in the Decision on Principles for the
sample or accuracy of the data. Reliable data can be usefully
Development of International Standards, Guides and Recom-
plotted in the high temperature region even if it does exhibit
mendations issued by the World Trade Organization Technical
some curvature. Extrapolations into such regions from lower
Barriers to Trade (TBT) Committee.
temperatures will lack accuracy, however. Experimental data
taken below the cloud point or temperature of crystal growth
2. Referenced Documents
will generally not be of reliable repeatability for interpolation
2
2.1 ASTM Standards:
or extrapolation on the charts. It should also be emphasized
that fluids other than hydrocarbons will usually not plot as a
1
This practice is under the jurisdiction ofASTM Committee D02 on Petroleum
straight line on these charts.
Products, Liquid Fuels, and Lubricants and are the direct responsibility of
Subcommittee D02.07 on Flow Properties.
CurrenteditionapprovedJuly1,2017.PublishedJuly2017.Originallyapproved
in 1932. Last previous edition approved in 2015 as D341–09 (2015). DOI:
10.1520/D0341-17.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from ASTM International Headquarters. Order Adjunct No.
the ASTM website. ADJD0341CS. Original adjunct produced in 1965.
*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

---------------------- Page: 1 ----------------------
D341 − 17
2
FIG. 1 Facsimile of Kinematic Viscosity-Temperature Chart I High Range (Temperature in degrees Celsius)

---------------------- Page: 2 ----------------------
D341 − 17
3
FIG. 2 Facsimile of Kinematic Viscosity-Temperature Chart II Low Range (Temperature in degrees Celsius)

---------------------- Page: 3 ----------------------
D341 − 17
4. Description provided for convenience in connection with reports and data
evaluation.ChartsIIIandIVarethesameasChartsIandIIand
4.1 The charts are designed to permit kinematic viscosity-
are provided in greatly reduced scale for convenience in
temperature data for a petroleum oil or fraction, and hydrocar-
connection with reports or quick evaluation of data. These
bons in general, to plot as a straight line over a wide range.
latter charts a
...

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: D341 − 09 (Reapproved 2015) D341 − 17
Standard Practice for
Viscosity-Temperature Charts for Liquid Petroleum
1
Products
This standard is issued under the fixed designation D341; 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*
1.1 This practice covers kinematic viscosity-temperature charts (see Figs. 1 and 2), which are a convenient means to ascertain
the kinematic viscosity of a petroleum oil or liquid hydrocarbon at any temperature within a limited range, provided that the
kinematic viscosities at two temperatures are known.
1.2 The charts are designed to permit petroleum oil kinematic viscosity-temperature data to plot as a straight line. The charts
here presented provide a significant improvement in linearity over the charts previously available under Method D341–43. This
increases the reliability of extrapolation to higher temperatures.
1.3 The values provided in SI units are to be regarded as standard. The values given in parentheses are provided for information
only.
1.3.1 Exception—The values given in parentheses are provided for information only.
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
2
2.1 ASTM Standards:
D445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)
D7042 Test Method for Dynamic Viscosity and Density of Liquids by Stabinger Viscometer (and the Calculation of Kinematic
Viscosity)
3
2.2 ASTM Adjuncts:
Viscosity-Temperature Charts 1–7
3. Technical Hazard
3.1 Warning—WarningThe—The charts should be used only in that range in which the hydrocarbon or petroleum fluids are
homogeneous liquids. The suggested range is thus between the cloud point at low temperatures and the initial boiling point at
higher temperatures. The charts provide improved linearity in both low kinematic viscosity and at temperatures up to 340 °C
(approximately 650 °F) or higher. Some high-boiling point materials can show a small deviation from a straight line as low as
280 °C (approximately 550 °F), depending on the individual sample or accuracy of the data. Reliable data can be usefully plotted
in the high temperature region even if it does exhibit some curvature. Extrapolations into such regions from lower temperatures
will lack accuracy, however. Experimental data taken below the cloud point or temperature of crystal growth will generally not
be of reliable repeatability for interpolation or extrapolation on the charts. It should also be emphasized that fluids other than
hydrocarbons will usually not plot as a straight line on these charts.
1
This practice is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and are the direct responsibility of Subcommittee
D02.07 on Flow Properties.
Current edition approved June 1, 2015July 1, 2017. Published June 2015July 2017. Originally approved in 1932. Last previous edition approved in 20092015 as
D341 – 09.D341 – 09 (2015). DOI: 10.1520/D0341-09R15.10.1520/D0341-17.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 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
Available from ASTM International Headquarters. Order Adjunct No. ADJD0341CS. Original adjunct produced in 1965.
*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

---------------------- Page: 1 ----------------------
D341 − 17
2
FIG. 1 Facsimile of Kinematic Viscosity-Temperature Chart I High Range (Temperature in degrees Celsius)

---------------------- Page: 2 ----------------------
D341 − 17
3
FIG. 2 Facsimile of Kinematic Viscosity-Temperature Chart II Low Range (Temperature in degrees Celsius)

---------------------- Page: 3 ----
...

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