1、Designation:D2319/D2319M141Standard Test Method forSoftening Point of Pitch(Cube-in-Air Method)1This standard is issued under the fixed designation D2319/D2319M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revisio
2、n.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEEditorial changes were made throughout the test method in September 2014.1.Scope*1.1 This test method covers the determination of the soft-en
3、ing point above 80 C 176 F of pitch.Test Method D3104gives comparable results.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the oth
4、er.Combiningvalues from the two systems may result in non-conformancewith the 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
5、 determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D61 Test Method for Softening Point of Pitches(Cube-in-Water Method)D3104 Test Method for Softening Point of Pitches(MettlerSoftening Point Method)D4296 Practice for Sampling PitchE1 Specif
6、ication for ASTM Liquid-in-Glass Thermometers3.Summary of Test Method3.1 Two cubes of pitch,supported on wire hooks,are heatedin a standardized air oven at a linear rate.The softening pointis the mean of the temperatures at which the cubes sagdownwards a distance of 60 mm 2.4 in.4.Significance and U
7、se4.1 Pitch does not go through a solid-liquid phase changewhen heated and therefore does not have a true melting point.As the temperature is raised,pitch softens and becomes lessviscous.The softening point is arbitrarily defined and must bedetermined by a closely controlled method that must becaref
8、ully followed if test results are to be reproducible.4.2 This test method is useful in determining the consis-tency of pitch as one element in establishing the uniformity ofshipments and sources of supply.5.Apparatus35.1 Air OvenThe oven shall be cylindrical,150 mm 6 in.in inside diameter by 155 mm
9、6.2 in.in height.It shall havetwo 75 mm 3 in.diameter windows of mica,centeredvertically on opposite sides,and shall be fitted with a coverhaving a central opening 25 mm 1 in.in diameter to hold athermometer,and a concentric ring suspended below to supportthe hooks with attached specimens.The ring s
10、hall be made of6 mm 14in.brass,shall be 54 mm 218in.in outsidediameter,and shall be centrally suspended 30 mm 1.2 in.below the cover.The cover shall have two 3 mm 0.12 in.holes on a diagonal 50 mm 2 in.from the center.On thebottom of the oven,an inner pan 140 mm 5.6 in.in diametershall rest on three
11、 brass legs 5 mm 0.2 in.in height fastenedto the bottom of the pan to provide an air space between thepan and the bottom of the oven.The side wall,cover,and panshall be made of 0.7 mm 0.028 in.thick or 22 gauge(BWG)copper sheet,and the bottom of 0.8 mm 0.032 in.thick or21 gauge copper.5.2 Tripod for
12、 Use with Gas BurnerThe tripod ring shallbe approximately 125 mm 5 in.in inside diameter so that theoven is supported only on its outer edges.It shall be 200 mm8 in.in height.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the
13、 direct responsibility ofSubcommittee D02.05 on Properties of Fuels,Petroleum Coke and Carbon Material.Current edition approved May 1,2014.Published May 2014.Originallyapproved in 1964.Last previous edition approved in 2013 as D2319/D2319M 98(2013).DOI:10.1520/D2319_D2319M-14E01.2For referenced ASTM
14、 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.3The sole source of supply of the softening point apparatus items,obtainable asa unit
15、on special order,known to the committee at this time is HumboldtManufacturing Co.,7302 W.Agatite Ave.,Chicago,IL 60656.If you are aware ofalternative suppliers,please provide this information to ASTM InternationalHeadquarters.Your comments will receive careful consideration at a meeting of therespon
16、sible technical committee,1which you may attend.All other apparatus itemsdescribed may be obtained from any regular laboratory equipment supply house.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.3 Shield for Oven:5.3.1 For Use with Electric HeaterThe shield shall becylindrical,216 mm or 8.64 in.in inside diameter by 181 mmor 714in.in height.It shall have two 76 mm o
