1、Designation: D3705 14Standard Test Method forMisting Properties of Lubricating Fluids1This standard is issued under the fixed designation D3705; 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
2、 parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This test method covers the determination of the mistingcharacteristics of lubricating fluids.NOTE 1This test method should not be used to eval
3、uate fluidscontaining solid additives such as graphite.1.2 The values stated in SI units are to be regarded asstandard.1.2.1 Inch-pound units are used to describe the various tubefittings shown in Fig. 1.1.2.2 Inch-pound thread is shown in Fig. 2.1.3 This standard does not purport to address all of
4、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 specificwarning statements, see Sections 7 and 8.2. Referenced
5、Documents2.1 ASTM Standards:2D91 Test Method for Precipitation Number of LubricatingOilsD235 Specification for Mineral Spirits (Petroleum Spirits)(Hydrocarbon Dry Cleaning Solvent)D4175 Terminology Relating to Petroleum, PetroleumProducts, and Lubricants3. Terminology3.1 For definitions of terms use
6、d in this test method, refer toTerminology D4175.3.2 Definitions of Terms Specific to This Standard:3.2.1 line condensate, nin a mist lubrication system, oilmist which has coalesced in the distribution lines and is notavailable for lubrication purposes.3.2.2 reclassified oil, nin a mist lubrication
7、system, lubri-cant that has coalesced into larger droplets at the points ofrequired lubrication.3.2.2.1 DiscussionMist lubrication systems are designedso that the oil mist will coalesce in the appropriate area andprovide lubrication in the right place.4. Summary of Test Method4.1 The mist generator
8、is charged with oil and installed inthe mist system. The unit is operated for 19 h; the mistgenerator, line condensate bottles, and reclassified oil collectorare weighed before and after the test. The output from thegenerator and percentages of reclassified oil, line condensate,and stray mist are de
9、termined from changes in weight.NOTE 2Line condensate is the commonly accepted term used todescribe the oil that coalesces in the mist 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 condensa
10、te. Oil thatcoalesces in the vertical 19 mm (34 in.) tubing becomes part of thereclassified oil.5. Significance and Use5.1 This test provides a guide for evaluating the mistingcharacteristics of oils for use in industrial mist lubricationsystems. The degree of correlation between this test and servi
11、ceperformance has not been fully determined.6. Apparatus6.1 The basic system consists of the following:6.1.1 Oil Mist Generator, Alemite No. 383802-B43,4(Fig. 1,item 23) with specialASTM-ASLE mist head 383803B4 (Fig.1, item 22). The oil mist generator is attached to the manifoldso that it may be eas
12、ily disconnected in order to determine itsmass before and after the test.6.1.2 Air Temperature Regulator, Alemite thermo-aire No.383808A44,5(Fig. 1, item 24).1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products, Liquid Fuels, and Lubricants and is the direct respons
13、ibility ofSubcommittee D02.L0.01 on Metal Removal Fluids and Lubricants.Current edition approved Oct. 1, 2014. Published November 2014. Originallyapproved in 1978. Last previous edition approved in 2009 as D3705 86 (2009).DOI: 10.1520/D3705-14.2For referenced ASTM standards, visit the ASTM website,
14、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.3The sole source of supply of known to the committee at this time is AlemiteCo., Stewart Warner, 1826 West Diversey P
15、arkway, Chicago, IL 60614.4If 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.5The sole source of supply of Alemite
16、thermo-aire unit No. 383808-A4 knownto the committee at this time is Alemite Co., Stewart Warner, 1826 West DiverseyParkway, Chicago, IL 60614.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 1942
17、8-2959. United States1(1) 112 C112 in. MPT union (19) Air flow meter (L/s)(2) 112 in. copper tubing, 3 in. long (20) Pressure gage, 7 kPa(3) 112 in. C C Return bend (21) Air filter(4) 112 in. C Union (22) Oil mist head assembly with adjusting screw(5) 112 34 112 in.CCCtee (23) Oilmistgenerator(6) 11
18、2 in. C 45 deg ftg Ell (straight ell) (24) Thermo-aire unit(7)34 in. ftg MPT adapter (25) Pressure gage, 4 kPa(8) 112 112 34 in.CCCtee (26) Thermocouple(9)34 in. C 45 deg ftg ell (27) Impingement plate(10) 112 ftg 34 in. C extended bushing (28) Collection box(11)34 in. C Union (29) Lid for collectio
19、n box(12)34 in. ftg C 45 deg ftg ell (30) 112 in. type “M” hard copper tubing, 41.3 mmO.D. 38.3 mm I.D.(13)34 in. ftg C 90 deg ftg ell (31)34 in. type “K” hard copper tubing, 22.2 mmO.D. 18.9 mm. I.D.(14)34 C12 in. FPT adapter (32) Flexible hose(15)12 in. reclassifier fitting(16) Collector bottle, 1
20、 L plastic with34 female NPT top(17) Thermometer(18) Pressure regulator with gage (2 mPa)FIG. 1 Mist Distribution ManifoldD3705 1426.1.3 Mist Distribution Manifold, as shown in Fig. 1.6.1.4 Mist Reclassifier Fitting, (Fig. 1, item 15; Fig. 2). Thefitting must be drilled exactly as shown in Fig. 2. A
21、nydeviations from the given hole size and pattern will negate thetest.6.1.5 Reclassified Oil Collector and Lid, as shown in Fig. 3and Fig. 4.6.2 Impingement Plate, as shown in Fig. 5.6.3 Balance, 20 kg capacity open pan, with 1 g sensitivity.6.4 Air Supply, from a source capable of maintaining an ai
22、rflow rate up to 2 dm3/s. The air should be dry, oil-free, andfiltered througha1mfilter. In order to ensure the driest andcleanest air possible, it is recommended that a drying elementand filtering system such as a desicant cartridge be added to theapparatus. The device chosen should maintain a flow
23、 rate of14 dm3/s and provide air with a dew point not in excess of40 C.NOTE 3The oil mist generator head and mist reclassifier fitting areavailable from the Alemite Co. Orders should specify Special ASTM-ASLE mist head and reclassifier fitting.NOTE 4While not required, the addition of an oil bath te
24、mperatureregulator (Alemite 383807A4) is recommended. Results will be moreconsistent if the oil is kept at a constant temperature.7. Reagents7.1 Stoddard Solvent, as specified in Specification D235(Type 1). (WarningFlammable.)7.2 Precipitation Naphtha, as specified in Test Method D91.(WarningFlammab
25、le.)FIG. 2 Mist Reclassifier FittingFIG. 3 Reclassified Oil CollectorD3705 143FIG. 4 Reclassified Oil Collector LidFIG. 5 Impingement PlateD3705 1448. Preparation of Apparatus8.1 Thorough cleaning of the apparatus with solvent isrequired prior to initiating a test on a new oil. For a duplicatetest o
26、n the same oil, the mist generator should be thoroughlydrained but the apparatus need not be cleaned with solvent.8.2 Drain the oil thoroughly and rinse the generator withStoddard solvent. (WarningCombustible. Vapor harmful.)8.3 Charge the generator with 2 L of clean Stoddard solventand mist the Sto
27、ddard solvent through the manifold for 30 min.(WarningDo not use the air heater while misting theStoddard solvent.)8.4 Drain the Stoddard solvent from the generator, rinse thegenerator with naphtha, and blow dry with compressed air.(WarningExtremely flammable. Harmful if inhaled. Vaporsmay cause fla
28、sh fire.)8.5 Disconnect the mist head and remove the oil adjustmentscrew; rinse the head and screw with naphtha and blow dry.8.6 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.9
29、. Procedure9.1 Break-In Period:9.1.1 Charge the mist generator with 4 L 6 0.1 L of test oil.Assemble the test apparatus.9.1.2 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.9.1.3 Open the air regul
30、ator until a pressure of 3.7 kPa isobtained on the manifold gage (Fig. 1, item 25).9.1.4 Activate the oil heater and inlet air heater and adjustboth to 40 C 6 1 C.9.1.5 Allow the unit to run for1htostabilize.NOTE 5The full open position for the oil flow adjusting screw, that is,the position beyond w
31、hich further opening of the adjusting screw does notincrease oil 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.9.2 Test Start-U
32、p:9.2.1 Following the 1 h break-in, deactivate the air and oilheaters and turn off the air supply.9.2.2 Disconnect and determine the mass of the mist gen-erator (W1) and install clean, tared line condensate bottles(LC1) and reclassified oil collector (RC1).9.2.3 Reassemble the apparatus. Turn on the
33、 inlet air andactivate the air and oil heaters to start the test.9.2.4 Record the air flow rate in dm3/s.9.2.5 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 to3.7 kPa
34、6 0.1 kPa and the inlet air temperature to 40 C.9.2.6 At the end of the 19 h test, deactivate the heaters andturn off the air supply. Disconnect and determine the mass ofthe mist generator (W2), line condensate bottles (LC2), andreclassified oil collector (RC2) within 15 min.10. Calculation and Repo
35、rt10.1 Calculate and report the oil output from the mistgenerator after break-in in grams per hour as follows:oil output 5W12 W219(1)where:W1= mass of the mist generator at the start of the test, g, andW2= mass of the mist generator after 19 h, g.10.2 Calculate and report the percent of reclassified
36、 oil asfollows:% reclassified oil 5RC22 RC1W12 W23100 (2)where:RC1= mass of the reclassified oil collector at the start of thetest, g,RC2= mass of the reclassified oil collector at the end of thetest, g.10.3 Calculate and report the percent of line condensate asfollows:% line condensate 5LC22 LC1W12
37、 W23100 (3)where:LC1= mass of the line condensate bottles at the start of thetest, g, andLC2= mass of the line condensate bottles at the end of thetest, g.10.4 Calculate and report the percent of stray mist asfollows:% stray mist 5 100 2 % reclassified oil1% line condensate! (4)NOTE 6For design cons
38、iderations, it may be desirable to calculate theoutput oil mist density or effective oil mist density, or 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/m35reclassified oil RC22 RC1! 31000air
39、flow rate dm3/s! 368.4(6)11. Precision and Bias611.1 The precision of this test method as determined bystatistical examination of interlaboratory results is as follows:11.1.1 RepeatabilityThe difference between successiveresults obtained by the same operator with the same apparatusunder constant ope
40、rating conditions on identical test materialwould, in the long run, in the normal and correct operation ofthe test method, exceed the following values only in one casein twenty:6Supporting data (derived from results of the cooperative tests on oils L-II-3-M,N, O, P, Q, R, S, T, U, V, W, and X) have
41、been filed at ASTM InternationalHeadquarters and may be obtained by requesting Research Report RR:D02-1056.D3705 145Oil output, g/h 8 %Percent reclassified oil 6 %Percent line condensate 22 %11.1.2 ReproducibilityThe difference between two singleand independent results obtained by different operator
42、s work-ing in different laboratories on identical 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 %11.2 BiasThe procedure in this test method has no biasbecause the values of Oil Ou
43、tput, percent Reclassified Oil, andpercent Line Condensate can be defined only in terms of a testmethod.NOTE 7The percent of stray mist is obtained by calculation rather thanby a direct determination. Therefore, no precision data are included forpercent of stray mist.APPENDIX(Nonmandatory Informatio
44、n)X1. METHOD FOR HANDLING STRAY MISTX1.1 Fig. X1.1 shows a container that has been foundsatisfactory 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 obtaine
45、d using an air jet exhauster or othersuitable means; the exhaust can be fed into the laboratoryexhaust system.X1.3 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
46、started, the vent hole should be enlarged or discon-nect the exhaust system drop leg from the container exhaustport and place it within an inch or two of the exhaust port.X1.4 The baffles must be included as an integral part of thecontainer to prevent air flow directly across the top of thereclassif
47、ied oil collector.X1.5 It is recommended that the container be placed in anarea with a non-slip floor.X1.6 Provisions such as gasketing must be used to seal thedoor so that the air flow to the exhaust port will not bedisturbed by air entering from other sources.SUMMARY OF CHANGESSubcommittee D02.L0
48、has identified the location of selected changes to this standard since the last issue(D3705 86 (2009) that may impact the use of this standard. (Approved Oct. 1, 2014.)(1) Revised subsection 1.2, Section 6, and Appendix X1.(2) Added new Section 3, Terminology.(3) Revised/updated all figures.ASTM Int
49、ernational takes no position respecting the validity of any patent rights asserted in connection with any item mentioned inthis 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 responsibility.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 wit
