ASTM D2532-16
(Test Method)Standard Test Method for Viscosity and Viscosity Change After Standing at Low Temperature of Aircraft Turbine Lubricants
Standard Test Method for Viscosity and Viscosity Change After Standing at Low Temperature of Aircraft Turbine Lubricants
SIGNIFICANCE AND USE
5.1 Aircraft turbine lubricants, upon standing at low temperatures for prolonged periods of time, may show an increase in kinematic viscosity. This increase may cause lubrication problems in aircraft engines. Thus, this test method is used to ensure that the kinematic viscosity does not exceed the maximum kinematic viscosity in certain specifications for aircraft turbine lubricants.
SCOPE
1.1 This test method covers the determination of the kinematic viscosity of aircraft turbine lubricants at low temperature, and the percent change of viscosity after a 3 h and a 72 h standing period at low temperature.
1.1.1 The range of kinematic viscosities covered by this test method is from 7700 mm2/s to 14 000 mm2/s at –40 °C and from 7000 mm2/s to 17 500 mm2/s at –51 °C. The precision has only been determined for those materials, kinematic viscosity ranges, and temperatures as shown in the precision section. Kinematic viscosities and percent change of viscosity may be measured and reported at other temperatures and other thermal soak period intervals as agreed by the contracting parties.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.2.1 The SI unit used in this test method for Kinematic Viscosity is mm2/s. For user reference, 1 mm2/s = 10-6 m2/s = 1 cSt.
1.3 Warning—Mercury has been designated by many regulatory agencies as a hazardous material that can cause central nervous system, kidney and liver damage. Mercury, or its vapor, may be hazardous to health and corrosive to materials. Caution should be taken when handling mercury and mercury containing products. See the applicable product Material Safety Data Sheet (MSDS) for details and EPA’s website—http://www.epa.gov/mercury/faq.htm—for additional information. Users should be aware that selling mercury and/or mercury containing products into your state or country may be prohibited by law.
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 and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 7.
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Designation: D2532 − 16
Standard Test Method for
Viscosity and Viscosity Change After Standing at Low
1
Temperature of Aircraft Turbine Lubricants
This standard is issued under the fixed designation D2532; 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* priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. For specific hazard
1.1 This test method covers the determination of the kine-
statements, see Section 7.
matic viscosity of aircraft turbine lubricants at low
temperature, and the percent change of viscosity after a 3 h and
2. Referenced Documents
a 72 h standing period at low temperature.
2
1.1.1 The range of kinematic viscosities covered by this test 2.1 ASTM Standards:
2 2
D445 Test Method for Kinematic Viscosity of Transparent
method is from 7700 mm /s to 14 000 mm /s at –40 °C and
2 2
from 7000 mm /s to 17 500 mm /s at –51 °C. The precision and Opaque Liquids (and Calculation of Dynamic Viscos-
ity)
has only been determined for those materials, kinematic
viscosity ranges, and temperatures as shown in the precision D446 Specifications and Operating Instructions for Glass
Capillary Kinematic Viscometers
section. Kinematic viscosities and percent change of viscosity
D6300 Practice for Determination of Precision and Bias
may be measured and reported at other temperatures and other
Data for Use in Test Methods for Petroleum Products and
thermal soak period intervals as agreed by the contracting
Lubricants
parties.
E1 Specification for ASTM Liquid-in-Glass Thermometers
1.2 The values stated in SI units are to be regarded as
E563 Practice for Preparation and Use of an Ice-Point Bath
standard. No other units of measurement are included in this
as a Reference Temperature
standard.
E644 Test Methods for Testing Industrial Resistance Ther-
1.2.1 The SI unit used in this test method for Kinematic
2 2 -6 2 mometers
Viscosity is mm /s. For user reference, 1 mm/s=10 m /s =
E1137 SpecificationforIndustrialPlatinumResistanceTher-
1 cSt.
mometers
1.3 Warning—Mercury has been designated by many regu-
E1750 Guide for Use of Water Triple Point Cells
latory agencies as a hazardous material that can cause central
E2593 Guide for Accuracy Verification of Industrial Plati-
nervous system, kidney and liver damage. Mercury, or its
num Resistance Thermometers
vapor, may be hazardous to health and corrosive to materials.
E2877 Guide for Digital Contact Thermometers
Caution should be taken when handling mercury and mercury
2.2 Other Documents:
containing products. See the applicable product Material
MIL-PRF-7808 Lubricating Oil, Aircraft Turbine Engine,
Safety Data Sheet (MSDS) for details and EPA’s website—
3
Synthetic Base
http://www.epa.gov/mercury/faq.htm—for additional informa-
MIL-PRF-23699 Lubricating Oil, Aircraft Turbine Engine,
tion. Users should be aware that selling mercury and/or
3
Synthetic Base, NATO Code Number O-156
mercury containing products into your state or country may be
prohibited by law.
3. Terminology
1.4 This standard does not purport to address all of the
3.1 Definitions:
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1
This test method is under the jurisdiction of ASTM Committee D02 on contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Standards volume information, refer to the standard’s Document Summary page on
Subcommittee D02.07 on Flow Properties. the ASTM website.
3
Current edition approved Dec. 1, 2016. Published January 2017. Originally Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
approved in 1966. Last previous edition approved in 2014 as D2532 – 14. DOI: Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
10.1520/D2532-16. dodssp.daps.dla.mil.
*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 ----------------------
D2532 − 16
3.1.1 digital contact thermometer (DCT), n—an electronic 6.5.1 When using liquid-in-glass thermometers, use a mag-
1
device consisting of a digital display and associated tempera- nifying device to read the thermometer to the nearest ⁄5
ture sensing probe.
d
...
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: D2532 − 14 D2532 − 16
Standard Test Method for
Viscosity and Viscosity Change After Standing at Low
1
Temperature of Aircraft Turbine Lubricants
This standard is issued under the fixed designation D2532; 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*
1.1 This test method covers the determination of the kinematic viscosity of aircraft turbine lubricants at low temperature, and
the percent change of viscosity after a 3 h and a 72 h standing period at low temperature.
2 2
1.1.1 The range of kinematic viscosities covered by this test method is from 7700 mm /s to 14 000 mm /s at –40 °C and from
2 2
7000 mm /s to 17 500 mm /s at –51 °C. The precision has only been determined for those materials, kinematic viscosity ranges,
and temperatures as shown in the precision section. Kinematic viscosities and percent change of viscosity may be measured and
reported at other temperatures and other thermal soak period intervals as agreed by the contracting parties.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
2 2 -6 2
1.2.1 The SI unit used in this test method for Kinematic Viscosity is mm /s. For user reference, 1 mm /s = 10 m /s = 1 cSt.
1.3 Warning—WARNINGMercury—Mercury has been designated by many regulatory agencies as a hazardous material that
can cause central nervous system, kidney and liver damage. Mercury, or its vapor, may be hazardous to health and corrosive to
materials. Caution should be taken when handling mercury and mercury containing products. See the applicable product Material
Safety Data Sheet (MSDS) for details and EPA’s website—http://www.epa.gov/mercury/faq.htm—for additional information.
Users should be aware that selling mercury and/or mercury containing products into your state or country may be prohibited by
law.
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 and health practices and determine the applicability of regulatory
limitations prior to use. For specific hazard statements, see Section 7.
2. Referenced Documents
2
2.1 ASTM Standards:
D445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)
D446 Specifications and Operating Instructions for Glass Capillary Kinematic Viscometers
D6300 Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products and Lubricants
E1 Specification for ASTM Liquid-in-Glass Thermometers
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
E1750 Guide for Use of Water Triple Point Cells
E2593 Guide for Accuracy Verification of Industrial Platinum Resistance Thermometers
E2877 Guide for Digital Contact Thermometers
2.2 Other Documents:
3
MIL-PRF-7808 Lubricating Oil, Aircraft Turbine Engine, Synthetic Base
3
MIL-PRF-23699 Lubricating Oil, Aircraft Turbine Engine, Synthetic Base, NATO Code Number O-156
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 Dec. 1, 2014Dec. 1, 2016. Published February 2015January 2017. Originally approved in 1966. Last previous edition approved in 20102014 as
D2532 – 10.D2532 – 14. DOI: 10.1520/D2532-14.10.1520/D2532-16.
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 Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://dodssp.daps.dla.mil.
*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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