ASTM D2532-22

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 substance that can cause serious medical issues. Mercury, or its vapor, has been demonstrated to be hazardous to health and corrosive to materials. Use caution when handling mercury and mercury-containing products. See the applicable product Safety Data Sheet (SDS) for additional information. The potential exists that selling mercury or mercury-containing products, or both, is prohibited by local or national law. Users must determine legality of sales in their location.  
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. For specific hazard statements, see Section 7.  
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

• Status: Published
• Publication Date: 30-Nov-2022
• ICS: 49.025.99 - Other materials
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.07 - Flow Properties

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: D2532 − 22
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* 1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This test method covers the determination of the kine-
responsibility of the user of this standard to establish appro-
matic viscosity of aircraft turbine lubricants at low
priate safety, health, and environmental practices and deter-
temperature, and the percent change of viscosity after a 3 h and
mine the applicability of regulatory limitations prior to use.
a 72 h standing period at low temperature.
For specific hazard statements, see Section 7.
1.1.1 The range of kinematic viscosities covered by this test
1.5 This international standard was developed in accor-
2 2
method is from 7700 mm /s to 14 000 mm /s at –40 °C and
dance with internationally recognized principles on standard-
2 2
from 7000 mm /s to 17 500 mm /s at –51 °C. The precision
ization established in the Decision on Principles for the
has only been determined for those materials, kinematic
Development of International Standards, Guides and Recom-
viscosity ranges, and temperatures as shown in the precision
mendations issued by the World Trade Organization Technical
section. Kinematic viscosities and percent change of viscosity
Barriers to Trade (TBT) Committee.
may be measured and reported at other temperatures and other
thermal soak period intervals as agreed by the contracting
2. Referenced Documents
parties.
2
2.1 ASTM Standards:
1.2 The values stated in SI units are to be regarded as
D445 Test Method for Kinematic Viscosity of Transparent
standard. No other units of measurement are included in this
and Opaque Liquids (and Calculation of Dynamic Viscos-
standard.
ity)
1.2.1 The SI unit used in this test method for Kinematic
D446 Specifications and Operating Instructions for Glass
2 2 -6 2
Viscosity is mm /s. For user reference, 1 mm/s=10 m /s =
Capillary Kinematic Viscometers
1 cSt.
D4175 Terminology Relating to Petroleum Products, Liquid
Fuels, and Lubricants
1.3 Warning—Mercury has been designated by many regu-
D6300 Practice for Determination of Precision and Bias
latory agencies as a hazardous substance that can cause serious
Data for Use in Test Methods for Petroleum Products,
medicalissues.Mercury,oritsvapor,hasbeendemonstratedto
Liquid Fuels, and Lubricants
be hazardous to health and corrosive to materials. Use caution
E1 Specification for ASTM Liquid-in-Glass Thermometers
when handling mercury and mercury-containing products. See
E563 Practice for Preparation and Use of an Ice-Point Bath
the applicable product Safety Data Sheet (SDS) for additional
as a Reference Temperature
information. The potential exists that selling mercury or
E644 Test Methods for Testing Industrial Resistance Ther-
mercury-containing products, or both, is prohibited by local or
mometers
national law. Users must determine legality of sales in their
E1137 SpecificationforIndustrialPlatinumResistanceTher-
location.
mometers
E1750 Guide for Use of Water Triple Point Cells
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
2
Subcommittee D02.07 on Flow Properties. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Dec. 1, 2022. Published December 2022. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1966. Last previous edition approved in 2017 as D2532 – 17. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D2532-22. the ASTM website.
*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 − 22
NOTE 1—Consult Specifications D446 regarding calibration constant
E2593 Guide for Accuracy Verification of Industrial Plati-
correction for the actual test temperature when using Specifications D446
num Resistance Thermometers
...

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 − 17 D2532 − 22
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 7000
2 2
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—Mercury has been designated by many regulatory agencies as a hazardous materialsubstance that can cause central
nervous system, kidney and liver damage. serious medical issues. Mercury, or its vapor, may has been demonstrated to be
hazardous to health and corrosive to materials. Caution should be taken Use caution when handling mercury and mercury
containing 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 (SDS) for additional informa-
tion. The potential exists that selling mercury and/or mercury containing products into your state or country may be prohibited by
law.or mercury-containing products, or both, is prohibited by local or national law. Users must determine legality of sales in their
location.
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. For specific hazard statements, see Section 7.
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.
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, 2017Dec. 1, 2022. Published May 2017December 2022. Originally approved in 1966. Last previous edition approved in 20162017 as
D2532 – 16.D2532 – 17. DOI: 10.1520/D2532-17.10.1520/D2532-22.
*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 − 22
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
D4175 Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
D6300 Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products, Liquid Fuels, 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
...