1、Designation:D167518Standard Test Methods forPolytetrafluoroethylene Tubing1This standard is issued under the fixed designation D1675;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 parentheses in
2、dicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 These test methods cover procedures for testing poly-tetrafluoroethylene tubi
3、ng for use as electrical insulation.Theprocedures appear in the following sections:ProcedureSectionsASTMMethodsConditioning7.Dielectric Breakdown Voltage28 30D149,D876Inside Diameter8 13D876Mandrel Bend Test46 52D149,D876Melting Point41 45D3418,D4895Penetration Test26 and 27D876Specific Gravity36 40
4、D792,D1505Strain Relief31 35.Volatile Loss20 25.Wall Thickness14 19.NOTE1These test methods are similar but not identical to those inIEC 606842.1.2 The values stated in inch-pound units are the standardexcept for temperature,which is stated in degrees Celsius.Values in parentheses are for informatio
5、n only.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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to u
6、se.For specific warning statements,see Section 5.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by t
7、he World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power FrequenciesD792 Test Methods for Density and Specific Gr
8、avity(Rela-tive Density)of Plastics by DisplacementD876 Test Methods for Nonrigid Vinyl Chloride PolymerTubing Used for Electrical InsulationD1505 Test Method for Density of Plastics by the Density-Gradient TechniqueD1711 Terminology Relating to Electrical InsulationD3418 Test Method for Transition
9、Temperatures and En-thalpies of Fusion and Crystallization of Polymers byDifferential Scanning CalorimetryD3487 Specification for Mineral Insulating Oil Used inElectrical ApparatusD4895 Specification for Polytetrafluoroethylene(PTFE)Resin Produced From DispersionE176 Terminology of Fire Standards2.2
10、 IEC Standards606842 Flexible Insulating SleevesPart 2:Methods ofTest33.Terminology3.1 Definitions:3.1.1 For definitions pertaining to electrical insulation,referto Terminology D1711.3.1.2 For definitions pertaining to fire standards,refer toTerminology E176.3.2 Definitions of Terms Specific to This
11、 Standard:1These test methods are under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and are the direct responsibility ofSubcommittee D09.07 on Electrical Insulating Materials.Current edition approved May 1,2018.Published May 2018.Originallyapproved in 1959
12、.Last previous edition approved in 2011 as D1675 03(2011).DOI:10.1520/D1675-18.2For 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 Summary page onthe
13、ASTM website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.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
14、 StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to
15、 Trade(TBT)Committee.1 3.2.1 apparent melting point,nthe temperature at whichthe appearance of the plastic changes from opaque to transpar-ent.3.2.2 strain relief,na dimensional change brought aboutby subjecting the tubing to an elevated temperature.3.2.3 volatile loss,nthe reduction in weight by va
16、poriza-tion under controlled conditions.4.Significance and Use4.1 The test methods in this standard are considered impor-tant to characterize polytetrafluoroethylene tubing.They areintended primarily for,but not limited to polytetrafluoroethyl-ene tubing.4.2 Variations in these methods or alternate contemporarymethods of measurement may be used to determine the valuesfor the properties in this standard provided such methodsensure quality levels and measurement accuracy equal to orbetter than tho