ASTM D3829-18
(Test Method)Standard Test Method for Predicting the Borderline Pumping Temperature of Engine Oil
Standard Test Method for Predicting the Borderline Pumping Temperature of Engine Oil
SIGNIFICANCE AND USE
5.1 Borderline pumping temperature is a measure of the lowest temperature at which an engine oil can be continuously and adequately supplied to the oil pump inlet of an automotive engine.
SCOPE
1.1 This test method covers the prediction of the borderline pumping temperature (BPT) of engine oils through the use of a 16 h cooling cycle over the temperature range from 0 °C to −40 °C. The precision is stated for temperatures from –34 °C to –15 °C.
1.2 Applicability to petroleum products other than engine oils has not been determined.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3.1 Exception—This test method uses the SI based unit of milliPascal second (mPa·s) for viscosity, which is equivalent to centipoise (cP).
1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 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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Designation: D3829 − 18
Standard Test Method for
Predicting the Borderline Pumping Temperature of Engine
1
Oil
This standard is issued under the fixed designation D3829; 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.
2
1. Scope* 2.2 ISO Standards:
ISO 17025General requirements for the competence of
1.1 This test method covers the prediction of the borderline
testing and calibration laboratories
pumping temperature (BPT) of engine oils through the use of
ISO Guide 34General requirements for the competence of
a 16h cooling cycle over the temperature range from 0°C to
reference material producers
−40°C.Theprecisionisstatedfortemperaturesfrom–34°Cto
–15°C.
3. Terminology
1.2 Applicability to petroleum products other than engine
3.1 Definitions:
oils has not been determined.
3.1.1 apparent viscosity, n—the determined viscosity ob-
1.3 The values stated in SI units are to be regarded as
tained by use of this test method.
standard. No other units of measurement are included in this
3.1.2 digital contact thermometer (DCT), n—an electronic
standard.
device consisting of a digital display and associated tempera-
1.3.1 Exception—This test method uses the SI based unit of
ture sensing probe.
milliPascalsecond(mPa·s)forviscosity,whichisequivalentto
centipoise (cP). 3.1.2.1 Discussion—This device consists of a temperature
sensor connected to a measuring instrument; this instrument
1.4 This standard does not purport to address all of the
measures the temperature-dependent quantity of the sensor,
safety concerns, if any, associated with its use. It is the
computes the temperature from the measured quantity, and
responsibility of the user of this standard to establish appro-
provides a digital output. This digital output goes to a digital
priate safety, health, and environmental practices and deter-
displayand/orrecordingdevicethatmaybeinternalorexternal
mine the applicability of regulatory limitations prior to use.
to the device. These devices are sometimes referred to as
1.5 This international standard was developed in accor-
“digital thermometers.”
dance with internationally recognized principles on standard-
3.1.2.2 Discussion—PET is an acronym for portable elec-
ization established in the Decision on Principles for the
tronic thermometers, a subset of digital contact thermometers
Development of International Standards, Guides and Recom-
(DCT).
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
3.1.3 Newtonian oil or fluid, n—anoilorfluidthatatagiven
temperature exhibits a constant viscosity at all shear rates or
2. Referenced Documents
shear stresses.
2.1 ASTM Standards:
3.1.4 non-Newtonian oil or fluid, n—an oil or fluid that at a
E563Practice for Preparation and Use of an Ice-Point Bath
given temperature exhibits a viscosity that varies with chang-
as a Reference Temperature
ing shear stress or shear rate.
E644Test Methods for Testing Industrial Resistance Ther-
mometers 3.1.5 viscosity, n—the ratio between the applied shear stress
and rate of shear. It is sometimes called the coefficient of
E1137SpecificationforIndustrialPlatinumResistanceTher-
mometers dynamic viscosity. This value is thus a measure of the
resistance to flow of the liquid. The SI unit of viscosity is the
E2877Guide for Digital Contact Thermometers
pascal second (Pa·s).
3.2 Definitions of Terms Specific to This Standard:
1
This test method 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.
CurrenteditionapprovedJune1,2018.PublishedJuly2018.Originallyapproved
2
in 1979. Last previous edition approved in 2017 as D3829–17. DOI: 10.1520/ Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
D3829-18. 4th Floor, New York, NY 10036, http://www.ansi.org.
*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 ----------------------
D3829 − 18
26
3.2.1 borderline pumping temperature, n—the maximum T 5 31.7M 310 (6)
r
temperature at which the critical yield stress or critical viscos-
τ 5 3.5M (7)
ity occurs, whichever is the higher temperature.
3.2.7 test oil, n—any oil for which the apparent viscosity
3.2.2 calibration oils, n—those oils for establishing the
and yield stress are to be determined by use of the test method
instrument’s reference framework of apparent viscosity versus
under description.
speed from
...
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: D3829 − 17 D3829 − 18
Standard Test Method for
Predicting the Borderline Pumping Temperature of Engine
1
Oil
This standard is issued under the fixed designation D3829; 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.
1. Scope*
1.1 This test method covers the prediction of the borderline pumping temperature (BPT) of engine oils through the use of a 16 h
cooling cycle over the temperature range from 0 °C to −40 °C. The precision is stated for temperatures from –34 °C to –15 °C.
1.2 Applicability to petroleum products other than engine oils has not been determined.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3.1 Exception—This test method uses the SI based unit of milliPascal second (mPa·s) for viscosity, which is equivalent to
centipoise (cP).
1.4 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 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
2.1 ASTM Standards:
E563 Practice for Preparation and Use of an Ice-Point Bath as a Reference Temperature
E644 Test Methods for Testing Industrial Resistance Thermometers
E1137 Specification for Industrial Platinum Resistance Thermometers
E2877 Guide for Digital Contact Thermometers
2
2.2 ISO Standards:
ISO 17025 General Requirementsrequirements for the Competencecompetence of Testingtesting and Calibration Laboratories-
calibration laboratories
ISO Guide 34 General Requirementsrequirements for the Competence of Reference Material Producerscompetence of reference
material producers
3. Terminology
3.1 Definitions:
3.1.1 apparent viscosity, n—the determined viscosity obtained by use of this test method.
3.1.2 digital contact thermometer (DCT), n—an electronic device consisting of a digital display and associated temperature
sensing probe.
3.1.2.1 Discussion—
1
This test method 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 May 1, 2017June 1, 2018. Published May 2017July 2018. Originally approved in 1979. Last previous edition approved in 20142017 as
D3829 – 14.D3829 – 17. DOI: 10.1520/D3829-17.10.1520/D3829-18.
2
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
*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 ----------------------
D3829 − 18
This device consists of a temperature sensor connected to a measuring instrument; this instrument measures the temperature-
dependent quantity of the sensor, computes the temperature from the measured quantity, and provides a digital output. This digital
output goes to a digital display and/or recording device that may be internal or external to the device. These devices are sometimes
referred to as “digital thermometers.”
3.1.2.2 Discussion—
PET is an acronym for portable electronic thermometers, a subset of digital contact thermometers (DCT).
3.1.3 Newtonian oil or fluid, n—an oil or fluid that at a given temperature exhibits a constant viscosity at all shear rates or shear
stresses.
3.1.4 non-Newtonian oil or fluid, n—an oil or fluid that at a given temperature exhibits a viscosity that varies with changing
shear stress or shear rate.
3.1.5 viscosity, n—the ratio between the applied shear stress and rate of shear. It is sometimes called the coefficient of dynamic
viscosity. This value is thus a measure of the resistance to flow of the liquid. The SI unit of viscosity is the pascal second (Pa·s).
3.2 Definitions:Defin
...
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