ASTM D2532-2014 Standard Test Method for Viscosity and Viscosity Change After Standing at Low Temperature of Aircraft Turbine Lubricants《飞行器涡轮机润滑剂承受低温后粘度和粘度变化的标准试验方法》.pdf
《ASTM D2532-2014 Standard Test Method for Viscosity and Viscosity Change After Standing at Low Temperature of Aircraft Turbine Lubricants《飞行器涡轮机润滑剂承受低温后粘度和粘度变化的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D2532-2014 Standard Test Method for Viscosity and Viscosity Change After Standing at Low Temperature of Aircraft Turbine Lubricants《飞行器涡轮机润滑剂承受低温后粘度和粘度变化的标准试验方法》.pdf(6页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D2532 10D2532 14Standard Test Method forViscosity and Viscosity Change After Standing at LowTemperature of Aircraft Turbine Lubricants1This standard is issued under the fixed designation D2532; the number immediately following the designation indicates the year oforiginal adoption or, i
2、n the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript 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
3、*1.1 This test method covers the determination of the kinematic viscosity of aircraft turbine lubricants at low temperature, andthe percent change of viscosity after a 3-h3 h and a 72-h72 h standing period at low temperature.1.1.1 The range of kinematic viscosities covered by this test method is fro
4、m 7700 mm2/s to 14 000 mm2/s at 40 C and from7000 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 andreporte
5、d 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 units unit used in this test method for Kinematic Viscosity
6、areis mm2/s. For user reference, 1 mm2/s = 10-6 m2/s= 1 cSt.1.3 WARNINGMercury has been designated by many regulatory agencies as a hazardous material that can cause centralnervous system, kidney and liver damage. Mercury, or its vapor, may be hazardous to health and corrosive to materials. Cautions
7、hould be taken when handling mercury and mercury containing products. See the applicable product Material Safety Data Sheet(MSDS) for details and EPAs websitehttp:/www.epa.gov/mercury/faq.htmfor additional information. Users should be awarethat selling mercury and/or mercury containing products into
8、 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 responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regu
9、latorylimitations prior to use. For specific hazard statements, see Section 67.2. Referenced Documents2.1 ASTM Standards:2D445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)D446 Specifications and Operating Instructions for Glass Capillar
10、y Kinematic ViscometersD6300 Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products and LubricantsE1 Specification for ASTM Liquid-in-Glass ThermometersE563 Practice for Preparation and Use of an Ice-Point Bath as a Reference TemperatureE644 Test Methods
11、 for Testing Industrial Resistance ThermometersE1137 Specification for Industrial Platinum Resistance ThermometersE1750 Guide for Use of Water Triple Point CellsE2593 Guide for Accuracy Verification of Industrial Platinum Resistance ThermometersE2877 Guide for Digital Contact Thermometers2.2 Other D
12、ocuments:MIL-PRF-7808 Lubricating Oil, Aircraft Turbine Engine, Synthetic Base3MIL-PRF-23699 Lubricating Oil, Aircraft Turbine Engine, Synthetic Base, NATO Code Number O-15631 This test method is under the jurisdiction ofASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is t
13、he direct responsibility of SubcommitteeD02.07 on Flow Properties.Current edition approved July 1, 2010Dec. 1, 2014. Published July 2010February 2015. Originally approved in 1966. Last previous edition approved in 20032010 asD2532D2532 10.03. DOI: 10.1520/D2532-10.10.1520/D2532-14.2 For referencedAS
14、TM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section
15、 D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/dodssp.daps.dla.mil.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. Becauseit may not be technically possible to adequatel
16、y depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM Inter
17、national, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13. Terminology3.1 Definitions:3.1.1 digital contact thermometer (DCT), nan electronic device consisting of a digital display and associated temperaturesensing probe.4. Summary of Test Method4.1 Kinematic vi
18、scosity is measuredand percent change is determined at low temperature in accordance with using apparatusdefined in Test Method D445 and Specifications D446 at time intervals of 3 h and 72 h.72 h following an initial measurement at35 min.NOTE 1This test method was developed and the precision establi
19、shed on tests at 53.9C (65F). It is also applied at 40C (40F) and may beused at other temperatures. Viscosities may be measured and reported at other intervals as agreed by the contracting parties.5. Significance and Use5.1 Aircraft turbine lubricants, upon standing at low temperatures for prolonged
20、 periods of time, may show an increase inkinematic viscosity. This increase may cause lubrication problems in aircraft engines. Thus, this test method is used to ensure thatthe kinematic viscosity does not exceed the maximum kinematic viscosity in certain specifications for aircraft turbine lubrican
21、ts.6. Apparatus6.1 Viscometers, drying tubes, low-temperature bath, thermometer, timer, secondary viscosity standard, filter, and cleaningsupplies are described in detail in Test Method D445.6.2 ViscometerThe viscometer shall meet the requirements of Test Method D445 and Specifications D446 and be o
22、f the typein which the sample can be rerun without cleaning the viscometer. Suitable holders should be used. For convenience it isrecommended that the viscometer size be chosen to keep the efflux time between 200200 s and 1000 s.1000 s.NOTE 1Consult Specifications D446 regarding calibration constant
23、 correction for the actual test temperature when using Specifications D446viscometers that are not suspended level types.6.3 Drying TubesFit the viscometer openings with drying tubes filled with indicating silica gel, using cotton at top and bottomto hold the loosely packed desiccant in place. Provi
24、de a cross-connection on the viscometer side of the drying tubes (which canbe closed by a pinch clamp or stopcock while liquid is being drawn into the efflux bulb) so that the restriction to air flow will notcause error. Replace the silica gel when a lavender color is noticeable.6.4 Viscosity Temper
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