1、Designation: D 3705 86 (Reapproved 2003)e1An American National StandardStandard Test Method forMisting Properties of Lubricating Fluids1This standard is issued under the fixed designation D 3705; the number immediately following the designation indicates the year oforiginal adoption or, in the case
2、of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.e1NOTEWarning notes were editorially moved into the standard text in June 2003.1. Scope1.1 This test met
3、hod covers the determination of the mistingcharacteristics of lubricating fluids.NOTE 1This test method should not be used to evaluate fluidscontaining solid additives such as graphite.1.2 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is the
4、responsibility 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 specificwarning statements, see Sections 6 and 7.2. Referenced Documents2.1 ASTM Standards:D91 Test Method for Precipitation
5、Number of LubricatingOils2D 235 Specification for Mineral Spirits (Petroleum Spirits)(Hydrocarbon Dry Cleaning Solvent)33. Summary of Test Method3.1 The mist generator is charged with oil and installed inthe mist system. The unit is operated for 19 h; the mistgenerator, line condensate bottles, and
6、reclassified oil collectorare weighed before and after the test. The output from thegenerator and percentages of reclassified oil, line condensate,and stray mist are determined from changes in weight.NOTE 2Line condensate is the commonly accepted term used todescribe the oil that coalesces in the mi
7、st distribution lines. In this test, theoil that coalesces in the 38-mm (112-in.) tubing and the diagonal 19-mm(34-in.) tubing is collected and weighed as line condensate. Oil thatcoalesces in the vertical 19-mm (34-in.) tubing becomes part of thereclassified oil.4. Significance and Use4.1 This test
8、 provides a guide for evaluating the mistingcharacteristics of oils for use in industrial mist lubricationsystems. The degree of correlation between this test and serviceperformance has not been fully determined.5. Apparatus5.1 The basic system consists of the following:5.1.1 Oil Mist Generator,4,5w
9、ith specialASTM-ASLE misthead assembly.5.1.2 Air Temperature Regulator.5,65.1.3 Mist Distribution Manifold, as shown in Fig. 1.5.1.4 Mist Reclassifier Fitting, as shown in Fig. 2.5.1.5 Reclassified Oil Collector, as shown in Fig. 3.5.2 Balance, 20-kg capacity open pan, with 1-g sensitivity.5.3 Air S
10、upply, from a source capable of maintaining an airflow rate up to 2 dm3/s. The air should be dry, oil-free, andfiltered through a 1-m filter.NOTE 3The oil mist generator head and mist reclassifier fitting areavailable from the Alemite Co. Orders should specify Special ASTM-ASLE mist head and reclass
11、ifier fitting.6. Reagents6.1 Stoddard Solvent, as specified in Specification D 235(Type 1). (WarningFlammable.)6.2 Precipitation Naphtha, as specified in Test MethodD91.(WarningFlammable.)7. Preparation of Apparatus7.1 Thorough cleaning of the apparatus with solvent isrequired prior to initiating a
12、test on a new oil. For a duplicate1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.L0 on Industrial Lubricants.Current edition approved May 10, 2003. Published July 2003. Originallyapproved in 19
13、78. Last previous edition approved in 1998 as D 370586 (1998).2Annual Book of ASTM Standards, Vol 05.01.3Annual Book of ASTM Standards, Vol 06.04.4The sole source of supply of Alemite No. 383802-4 known to the committee atthis time isAlemite Co., Stewart Warner, 1826 West Diversey Parkway, Chicago,
14、IL60614.5If you are aware of alternative suppliers, please provide this information toASTM International Headquarters. Your comments will receive careful consider-ation at a meeting of the responsible technical committee1, which you may attend.6The sole source of supply of Alemite thermo-aire unit N
15、o. 383808-A4 knownto the committee at this time is Alemite Co., Stewart Warner, 1826 West DiverseyParkway, Chicago, IL 60614.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.test on the same oil, the mist generator should be thoroughl
16、ydrained but the apparatus need not be cleaned with solvent.7.2 Drain the oil thoroughly and rinse the generator withStoddard solvent. (WarningCombustible. Vapor harmful.)7.3 Charge the generator with 2 L of clean Stoddard solventand mist the Stoddard solvent through the manifold for 30 min.(Warning
17、Do not use the air heater while misting theStoddard solvent.)7.4 Drain the Stoddard solvent from the generator, rinse thegenerator with naphtha, and blow dry with compressed air.(WarningExtremely flammable. Harmful if inhaled. Vaporsmay cause flash fire.)7.5 Disconnect the mist head and remove the o
18、il adjustmentscrew; rinse the head and screw with naphtha and blow dry.7.6 Remove the reclassifier fitting and rinse it with naphtha;examine the orifices for deposits or buildup. If necessary, theorifices may be cleaned with a fine pipe cleaner.8. Procedure8.1 Break-In Period:8.1.1 Charge the mist g
19、enerator with 4 6 0.1 L of test oil.Assemble the test apparatus.8.1.2 Turn the oil flow adjusting screw clockwise to a fullyclosed position and then open the screw by turning it counter-clockwise to a full open position.8.1.3 Open the air regulator until a pressure of 37 millibars(37 KPa) is obtaine
20、d on the manifold gage.8.1.4 Activate the oil heater and inlet air heater and adjustboth to 40 6 1C.8.1.5 Allow the unit to run for1htostabilize.NOTE 4The full open position for the oil flow adjusting screw, that is,the position beyond which further opening of the adjusting screw does notincrease oi
21、l output from the mist generator, should be determined for eachmist test unit. The full open position on most test units is attained byturning the adjusting screw counterclockwise 2-12 turns from the fullyclosed position.8.2 Test Start-Up:8.2.1 Following the 1-h break-in, deactivate the air and oilh
22、eaters and turn off the air supply.MIST MANIFOLD (12)34 in. Fig 3 C 45 deg Fig. ellProposed ASTM Bill of Materials (13)34 in. Fig 3 C 90 deg Fig ell(1) 112 C 3 112 in. MPT union (14)34 C 312 in. F adapter(2) 112 in. Copper tubing, 3 in. Long (15)12 in. Reclassifier fitting 12 holes(3) 112 in. C 3 C
23、Return bend (16) Collector bottles(4) 112 in. C Union (17) Thermometer(5) 112 334 3 112 in. C 3 C 3 C tee (18) Pressure regulator with gage(6) 112 in. C 45 deg Fig. ell (straight ell) (19) Flow meter(7)34 in. Fig 3 MPT adapter (20) Pressure gage(8) 112 3 112 334 in. C 3 C 3 C tee (21) Air filter(9)3
24、4 in. C 45 deg Fig. ell (22) Oil mist head assembly special ASTM-ASLE(10) 112 in. Fig. 334 in. C extended bushing (23) Oil mist generator(11)34 in. C Union (24) Thermo-aire unitFIG. 1 Mist Test ApparatusD 3705 86 (2003)e12FIG. 2 Mist Reclassifier FittingFIG. 3 Reclassified Oil CollectorD 3705 86 (20
25、03)e138.2.2 Disconnect and weigh the mist generator (W1) andinstall clean, tared line condensate bottles (LC1) and reclassi-fied oil collector (RC1).8.2.3 Reassemble the apparatus. Turn on the inlet air andactivate the air and oil heaters to start the test.8.2.4 Record the air flow rate in dm3/s.8.2
26、.5 Check the inlet air temperature, oil reservoir tempera-ture and manifold temperature. Make adjustments, if necessary,30 min after starting the test to bring the manifold pressure to37 6 1 millibars, (3.7 6 0.1 KPa) and the inlet air temperatureto 40C.8.2.6 At the end of the 19-h test, deactivate
27、the heaters andturn off the air supply. Disconnect and weigh the mist generator(W2), line condensate bottles (LC2), and reclassified oil collec-tor ( RC2) within 15 min.9. Calculation and Report9.1 Calculate and report the oil output from the mistgenerator after break-in in grams per hour as follows
28、:oil output 5W12 W219(1)where:W1= weight of the mist generator at the start of the test, g,andW2= weight of the mist generator after 19 h, g.9.2 Calculate and report the percent of reclassified oil asfollows:% reclassified oil 5RC22 RC1W12 W23 100 (2)where:RC1= weight of the reclassified oil collect
29、or at the start ofthe test, g,RC2= weight of the reclassified oil collector at the end ofthe test, g.9.3 Calculate and report the percent of line condensate asfollows:% line condensate 5LC22 LC1W12 W23 100 (3)where:LC1= weight of the line condensate bottles at the start ofthe test, andLC2= weight of
30、 the line condensate bottles at the end ofthe test.9.4 Calculate and report the percent of stray mist as follows:% stray mist 5 1002% reclassified oil 1 % line condensate!(4)NOTE 5For design considerations, it may be desirable to calculate theoutput oil mist density or effective oil mist density, or
31、 both. Thesecalculations are made as follows:Oil output mist density, mg/m35oil output g/h!31000air flow rate dm3/s!33.6(5)Effective oil mist density, mg/m3(6)5reclassified oil RC22 RC1! 3 1000air flow rate dm3/s! 3 68.410. Precision and Bias710.1 The precision of this test method as determined byst
32、atistical examination of interlaboratory results is as follows:10.1.1 RepeatabilityThe difference between successiveresults obtained by the same operator with the same apparatusunder constant operating conditions on identical test materialwould, in the long run, in the normal and correct operation o
33、fthe test method, exceed the following values only in one casein twenty:Oil output, g/h 8 %Percent reclassified oil 6 %Percent line condensate 22 %10.1.2 ReproducibilityThe difference between two singleand independent results obtained by different operators work-ing in different laboratories on iden
34、tical test material would, inthe long run, exceed the following values only in one case intwenty:Oil output, g/h 41 %Percent reclassified oil 57 %Percent line condensate 73 %10.2 BiasThe procedure in this test method has no biasbecause the values of Oil Output, percent Reclassified Oil, andpercent L
35、ine Condensate can be defined only in terms of a testmethod.NOTE 6The percent of stray mist is obtained by calculation ratherthan by a direct determination. Therefore, no precision data are includedfor percent of stray mist.7Supporting data (derived from results of the cooperative tests on oils L-II
36、-3-M,N, O, P, Q, R, S, T, U, V, W, and X) have been filed at ASTM InternationalHeadquarters and may be obtained by requesting Research Report RR: D02-1056.D 3705 86 (2003)e14APPENDIX(Nonmandatory Information)X1. METHOD FOR HANDLING STRAY MISTX1.1 Fig. X1.1 shows a container that has been foundsatisf
37、actory for handling the stray mist generated during thetest.X1.2 The stray mist is sucked from the container through afilter-coalescer unit which removes approximately 99 % of theoil. The suction is obtained using an air jet exhauster; theexhaust can be fed into the laboratory exhaust system.5,8X1.3
38、 The exhaust system should be started after a mist testhas been initiated and must not affect the manifold pressure. Ifa decrease in manifold pressure is noted when the exhaustsystem is started, the vent hole should be enlarged.X1.4 The baffles must be included as an integral part of thecontainer to
39、 prevent air flow directly across the top of thereclassified oil collector.8The sole source of supply of the Figure 431 1-in. jet exhauster known to thecommittee at this time is Schulte and Koerting, State Rd and Traylor Ave.,Cornwells Heights, PA 19020.D 3705 86 (2003)e15ASTM International takes no
40、 position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own respons
41、ibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed t
42、o ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the add
43、ress shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).FIG. X1.1 Apparatus For Removing Stray MistD 3705 86 (2003)e16
