ASTM D3829-20a
(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.
General Information
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Standards Content (Sample)
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.
Designation: D3829 − 20a
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-
tained by use of this test method.
1.3 The values stated in SI units are to be regarded as
3.1.2 digital contact thermometer (DCT), n—an electronic
standard. No other units of measurement are included in this
standard. device consisting of a digital display and associated tempera-
ture sensing probe.
1.3.1 Exception—This test method uses the SI based unit of
3.1.2.1 Discussion—This device consists of a temperature
milliPascalsecond(mPa·s)forviscosity,whichisequivalentto
sensor connected to a measuring instrument; this instrument
centipoise (cP).
measures the temperature-dependent quantity of the sensor,
1.4 This standard does not purport to address all of the
computes the temperature from the measured quantity, and
safety concerns, if any, associated with its use. It is the
provides a digital output. This digital output goes to a digital
responsibility of the user of this standard to establish appro-
displayand/orrecordingdevicethatmaybeinternalorexternal
priate safety, health, and environmental practices and deter-
to the device.
mine the applicability of regulatory limitations prior to use.
3.1.2.2 Discussion—The devices are often referred to as a
1.5 This international standard was developed in accor-
“digitalthermometers,”howeverthetermincludesdevicesthat
dance with internationally recognized principles on standard-
sense temperature by means other than being in physical
ization established in the Decision on Principles for the
contact with the media.
Development of International Standards, Guides and Recom-
3.1.2.3 Discussion—PET is an acronym for portable elec-
mendations issued by the World Trade Organization Technical
tronic thermometers, a subset of digital contact thermometers
Barriers to Trade (TBT) Committee.
(DCT).
3.1.3 Newtonian oil or fluid, n—anoilorfluidthatatagiven
2. Referenced Documents
temperature exhibits a constant viscosity at all shear rates or
2.1 ASTM Standards: shear stresses.
D8278Specification for Digital Contact Thermometers for
3.1.4 non-Newtonian oil or fluid, n—an oil or fluid that at a
Test Methods Measuring Flow Properties of Fuels and
given temperature exhibits a viscosity that varies with chang-
Lubricants
ing shear stress or shear rate.
E563Practice for Preparation and Use of an Ice-Point Bath
3.1.5 viscosity, n—the ratio between the applied shear stress
as a Reference Temperature
and rate of shear which is sometimes called the coefficient of
dynamic viscosity and is a measure of the resistance to flow of
the liquid.
1
This test method is under the jurisdiction of ASTM Committee D02 on
3.2 Definitions of Terms Specific to This Standard:
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.07 on Flow Properties.
Current edition approved Nov. 1, 2020. Published November 2020. Originally
2
approved in 1979. Last previous edition approved in 2020 as D3829–20. DOI: Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
10.1520/D3829-20A. 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 − 20a
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 oi
...
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 − 20 D3829 − 20a
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, 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.
2. Referenced Documents
2.1 ASTM Standards:
D8278 Specification for Digital Contact Thermometers for Test Methods Measuring Flow Properties of Fuels and Lubricants
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 requirements for the competence of testing and calibration laboratories
ISO Guide 34 General requirements for the competence of reference material producers
3. Terminology
3.1 Definitions:
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 June 1, 2020Nov. 1, 2020. Published June 2020November 2020. Originally approved in 1979. Last previous edition approved in 20182020 as
D3829 – 18.D3829 – 20. DOI: 10.1520/D3829-20.10.1520/D3829-20A.
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 − 20a
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—
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—
The devices are often referred to as a “digital thermometers,” however the term includes devices that sense temperature by means
other than being in physical contact with the media.
3.1.2.3 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 sh
...
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