1、Designation: D 7317 07An American National StandardStandard Test Method forCoagulated Pentane Insolubles in Used Lubricating Oils byPaper Filtration (LMOA Method)1This standard is issued under the fixed designation D 7317; the number immediately following the designation indicates the year oforigina
2、l adoption or, in the case 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.1. Scope1.1 This test method covers the determination of coagulatedpentane in
3、solubles in used lubricating oils by a paper filtrationmethod.1.2 This test method was originally developed by the Fuels,Lubricants, and Environmental Committee (FL filtration; insolubles; LMOA; lubricating oil;pentane insolubles; used5Supporting data have been filed at ASTM International Headquarte
4、rs and maybe obtained by requesting Research Report RR: D021610.TABLE 1 Calculated Precision at Selected Insolubles LevelsInsolubles Result,%Repeatability,% (same units)Reproducibility,% (same units)0.00 0.11 0.420.20 0.12 0.470.40 0.13 0.510.60 0.14 0.560.80 0.16 0.611.0 0.17 0.661.5 0.20 0.772.0 0
5、.23 0.892.5 0.26 1.03.0 0.29 1.13.5 0.32 1.24.0 0.35 1.44.5 0.38 1.55.0 0.41 1.6D7317074APPENDIX(Nonmandatory Information)X1. TROUBLESHOOTING GUIDEX1.1 During the development of the test method, a numberof observations were made that helped operators recognizeproblems. These are described below.X1.2
6、 Repeatability was found to be best if the samplesfiltered in less than 5 min. With extended filter times, theweights tend to be high, since the insolubles on blocked filterscannot be rinsed enough to remove oil and coagulant residue.X1.3 Residual coagulant will give high results. The follow-ing wer
7、e found to indicate the presence of residual coagulant:curling of the filter edges with drying, a yellow ring around theedge of the insolubles, or a blotchy surface appearance that istacky.X1.4 In humid climates (65 % relative humidity), thecooling caused by pentane evaporation may cause frost to fo
8、rmon both the filter and inside the holder while rinsing. If thishappens, remove the filter after rinsing and dry for at least 1 hin a 100C oven. An oven or compressed air may be used tothoroughly dry out a holder. Warm the dried filter holders ontop of the oven until ready for use. Avoid using any
9、holder thatis still hot or damp.ASTM International takes no 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
10、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 withdrawn. Your comments are invited either for revision of this st
11、andard or for additional standardsand should be addressed to 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
12、 views known to the ASTM Committee on Standards, at the address 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).D7317075
