1、Designation:D116808AnAmerican National StandardStandard Test Methods forHydrocarbon Waxes Used for Electrical Insulation1This standard is issued under the fixed designation D1168;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the ye
2、ar 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.Scope*1.1 These test methods cover a compendium of tests thatapply to mineral waxes of petroleum origin in general,butmore spe
3、cifically to the so-called microcrystalline types usedas either electrical insulation or moisture-proofing mediums,orboth,for treating,impregnating,coating,and filling electricalapparatus.These test methods are also applicable to otherwaxes of natural or synthetic origin,provided that theircharacter
4、istics are similar to those of the so-called microcrys-talline waxes.NOTE1There is no equivalent ISO or IEC standard.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses are mathematicalconversions to inch-pound units that are provided for informa-tion only
5、 and are not considered 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 limitation
6、s prior to use.For specificprecautions,see Section 5.2.Referenced Documents2.1 ASTM Standards:2D6 Test Method for Loss on Heating of Oil and AsphalticCompoundsD70 Test Method for Density of Semi-Solid BituminousMaterials(Pycnometer Method)D87 Test Method for Melting Point of Petroleum Wax(Cooling Cu
7、rve)D88 Test Method for Saybolt ViscosityD92 Test Method for Flash and Fire Points by ClevelandOpen Cup TesterD94 Test Methods for Saponification Number of PetroleumProductsD127 Test Method for Drop Melting Point of PetroleumWax,Including PetrolatumD176 Test Methods for Solid Filling and Treating Co
8、m-pounds Used for Electrical Insulation(Withdrawn 0)3D445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids(and Calculation of Dynamic Viscos-ity)D664 Test Method for Acid Number of Petroleum Productsby Potentiometric TitrationD937 Test Method for Cone Penetration of PetrolatumD93
9、8 Test Method for Congealing Point of PetroleumWaxes,Including PetrolatumD974 Test Method for Acid and Base Number by Color-Indicator TitrationD1321 Test Method for Needle Penetration of PetroleumWaxesD1500 Test Method for ASTM Color of Petroleum Products(ASTM Color Scale)D1711 Terminology Relating
10、to Electrical InsulationD2161 Practice for Conversion of Kinematic Viscosity toSaybolt Universal Viscosity or to Saybolt Furol ViscosityE28 Test Methods for Softening Point of Resins Derivedfrom Naval Stores by Ring-and-Ball Apparatus3.Terminology3.1 Definitions For definitions of terms used in thes
11、e testmethods,refer to Terminology D1711.4.Significance and Use4.1 The significance and use of the individual test methodsare to be found in the individual methods referenced.Forsignificance specifically applicable to electrical insulationmaterials,refer to Test Methods D176.5.Safety Precautions5.1
12、Heat waxes in ovens with low-temperature heatingelements,forced exhaust,and safety door latches to minimizethe hazard of explosion of vapors.1These methods are under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and are the direct responsibility ofD09.01Elec
13、trical Insulating Varnishes,Powders and Encapsulating Compounds.01on Electrical Insulating Varnishes,Powders,and Encapsulating Compounds.Current edition approved May 1,2008.Published June 2008.Originallyapproved in 1951.Last previous edition approved in 2003 as D1168 99(2003).DOI:10.1520/D1168-08.2F
14、or 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 Summary page onthe ASTM website.3The last approved version of this historical standard is referenced
15、 onwww.astm.org.*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 StatesNOTICE:This standard has either been superseded and replaced by a new version or withdrawn.Contact ASTM Interna
16、tional(www.astm.org)for the latest information16.Test Methods6.1 Use the following methods for testing hydrocarbonwaxes as specified for the individual material:6.1.1 ColorTest Method D1500.6.1.2 Melting and Softening Properties:6.1.2.1 Determine melting point by Test Method D127.6.1.2.2 Determine softening point by the ring-and-ball TestMethod E28.Make three measurements.If any measurementdiffers from the average by more than 1 C,the significance ofthe test is doubtful.6.1.2.3 Use Test Method D