ASTM_D_1742_-_06_2013.pdf

Designation:D174206(Reapproved 2013)Standard Test Method forOil Separation from Lubricating Grease During Storage1This standard is issued under the fixed designation D1742;the number immediately following the designation indicates the year oforiginal adoption or,in 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.Scope1.1 This test method covers the determination of the ten-dency of a lubricating grease to separate oil during storage inboth normally filled and partially filled containers.1.2 This test method is not suitable for greases softer thanNLGI No.1 grade.1.3 The values stated in SI units are to be regarded asstandard,except for the dimensions in Fig.2 and Fig.5,whereinch-pound units are standard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.For a specifichazard statement,see 7.1.2.Referenced Documents2.1 ASTM Standards:2E11 Specification for Woven Wire Test Sieve Cloth and TestSieves2.2 Other Standard:NLGI Grease Consistency Classification33.Terminology3.1 Definitions:3.1.1 lubricating grease,na semi-fluid to solid product ofa thickener in a liquid lubricant.3.1.1.1 DiscussionThe dispersion of the thickener forms atwo-phase system and immobilizes the liquid lubricant bysurface tension and other physical forces.Other ingredients arecommonly included to impart special properties.3.1.2 thickener,nin lubricating grease,a substance com-posed of finely-divided particles dispersed in a liquid lubricantto form the products structure.3.1.2.1 DiscussionThe thickeners can be fibers(such asvarious metallic soaps)or plates or spheres(such as certainnon-soap thickeners),which are insoluble or,at most,only veryslightly soluble in the liquid lubricant.The general require-ments are that the solid particles be extremely small,uniformlydispersed,and capable of forming a relatively stable,gel-likestructure with the liquid lubricant.3.1.3 oil separation,nthe appearance of a liquid fractionfrom an otherwise homogeneous lubricating composition.4.Summary of Test Method4.1 The sample of grease,supported on a 75-m(No.200)sieve,is subjected to 1.72 kPa(0.25 psi)air pressure for 24 hat 25C(77F).Any oil seepage that occurs drains into a beakerand is weighed.5.Significance and Use5.1 When a lubricating grease separates oil,the remainingcomposition increases in consistency.This can affect the abilityof the product to function as designed.5.2 It has been found that the results of this test correlatedirectly with the oil separation that occurs in 35-lb pails ofgrease during storage.5.3 This test method is not intended to predict oil separationtendencies of the grease under dynamic conditions.6.Apparatus6.1 Test Apparatus4-6The assembled apparatus consists ofa tightly fitting cup and cover which contains a 75-m(No.1This test method is under the jurisdiction of the ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.G0.03 on Physical Tests.Current edition approved Dec.1,2013.Published December 2013.Originallyapproved in 1960.Last previous edition approved in 2006 as D1742 06.DOI:10.1520/D1742-06R13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from NLGI,4635 Wyandotte St.,Kansas City,MO 64112.4The sole source of supply of Pressure Bleeding Test Cell A known to thecommittee at this time is Koehler Instrument Company,Inc.1595 SycamoreAvenue,Bohemia,NY 11716.If you are aware of alternative suppliers,pleaseprovide this information to ASTM International Headquarters.Your comments willreceive careful consideration at a meeting of the responsible technical committee,1which you may attend.5The sole source of supply of the Pressure Bleeding Test Cell B known to thecommittee at this time is Stanhope-Seta,London Street,Chertsey,Surrey,KT168AP,UK.If you are aware of alternative suppliers,please provide this informationto ASTM International Headquarters.Your comments will receive careful consid-eration at a meeting of the responsible technical committee,1which you may attend.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 200)sieve strainer for supporting the grease,a funnel forcollecting separated oil,and a 20-mL beaker for retaining theseparated oil.A fitting is provided in the cover for inlet air(1.72 kPa(0.25 psi)and a hole is provided in the side of thecu