1、Designation:D534693(Reapproved 2009)Standard Test Method forDetermination of the Pour Point of Petroleum Oil Used inFatliquors and Softening Compounds1This standard is issued under the fixed designation D5346;the number immediately following the designation indicates the year oforiginal adoption or,
2、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.1.Scope1.1 This test method covers the determination of the pourpoint of petroleum oils used in th
3、e softening and stuffing ofleather,and in the manufacture of fatliquors and other soften-ing and stuffing compounds.This test method was derived fromTest Method D97 and ALCA Method H-18.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in this
4、standard.1.3 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.2.Referen
5、ced Documents2.1 ASTM Standards:2D97 Test Method for Pour Point of Petroleum ProductsE1 Specification for ASTM Liquid-in-Glass Thermometers2.2 Other Document:ALCA Method H-18 Cloud and Pour Point33.Significance and Use3.1 This test method is intended to determine the pour pointof petroleum oils used
6、 in the softening and stuffing of leather,as well as those used in the manufacture of products for suchpurpose.The pour point of petroleum oils is measured for thepurpose of quality assurance.4.Apparatus(see Fig.1)4.1 Test Jar,clear cylindrical glass,flat bottom,30 to33.5-mm inside diameter,and 115
7、to 125-mm height.Toindicate sample height the jar should be marked with a line 546 3 mm above the inside bottom.4.2 Thermometers,having ranges shown below and con-forming to the requirements prescribed in Specification E1 forthermometers:TemperatureThermometer NumberThermometerRangeASTMIPHigh cloud
8、and pour38 to+50C5C1CLow cloud and pour80 to+20C6C2CMelting point+32 to+127C61C63C4.2.1 Since separation of liquid column thermometers occa-sionally occurs and may escape detection,thermometersshould be checked immediately prior to the test and used onlyif they prove accurate within 6 1C(for example
9、 ice point).4.3 Cork,to fit the test jar,bored centrally for the testthermometer.4.4 Jacket,metal or glass,watertight,cylindrical,flatbottom,115 mm in depth,42 to 50 mm inside diameter.It mustbe supported firmly in a vertical position in the cooling bath of4.7 so that not more than 25 mm projects ou
10、t of the coolingmedium.4.5 Disk,cork or felt,6 mm thick to fit loosely inside thejacket.4.6 Gasket,to fit snugly around the outside of the test jarand loosely inside the jacket.The gasket may be made ofrubber,leather,or other material that is elastic enough to clingto the test jar and hard enough to
11、 hold its shape.Its purpose isto prevent the test jar from touching the jacket.4.7 Bath or Baths,maintained at prescribed temperatureswith a firm support to hold the jacket vertical.The requiredbath temperatures may be obtained by refrigeration ifavailable,otherwise by suitable freezing mixtures.Fre
12、ezingmixtures commonly used for temperatures down to thoseshown are as follows:For Temperatures DownIce and water9CCrushed ice and sodium chloride crystals12CCrushed ice and calcium chloride crystals27CAcetone or petroleum naphtha(see Section 5)chilledin a covered metal beaker with an ice-salt mixtu
13、reto 12C then with enough solid carbon dioxide togive the desired temperature.57C1This test method is under the jurisdiction of ASTM Committee D31 on Leatherand is the direct responsibility of Subcommittee D31.08 on Fats and Oils.Current edition approved April 1,2009.Published July 2009.Originallyap
14、proved in 1993.Last previous edition approved in 2003 as D5346 93(2003)e1.DOI:10.1520/D5346-93R09.2For 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
15、Summary page onthe ASTM website.3Available from American Leather Chemists Assn.,Texas Tech University,P.O.Box 45300,Lubbock,TX 79409.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 NOTE1There are automatic pour point testers available and
16、 in usewhich may be advantageous in the saving of test time,permit the use ofsmaller samples,and have other factors which may merit their use.Ifautomatic testers are used,the user must ensure that all of the manufac-turers instructions for calibration,adjustment and operation of theinstrument are followed.It must be reported that the pour point wasdetermined by an automatic instrument.Precision of automatic pour pointtesters has not been determined.In any case of dispute,the pour point asdetermi
