1、Designation:D167503(Reapproved 2011)Standard 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
2、in parentheses indicates 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.Scope1.1 These test methods cover procedures for testing poly-tetraflu
3、oroethylene tubing 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 27D876Speci
4、fic Gravity36 40D792,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 ar
5、e for information 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 and health practices and determine the applica-bility of regulatory limitations prior to
6、 use.For specificwarning statements,see Section 5.2.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 Gravity(Rela-tive Den
7、sity)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 Temperatures and En
8、-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 IEC Standards60684
9、2 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 Standard:3.2.1 app
10、arent 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 vaporiza-tion under controlled con
11、ditions.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.1These test methods are under the jurisdiction of ASTM Committee D09 onElectr
12、ical and Electronic Insulating Materials and are the direct responsibility ofSubcommittee D09.07 on Flexible and Rigid Insulating Materials.Current edition approved Aug.1,2011.Published August 2011.Originallyapproved in 1959.Last previous edition approved in 2003 as D1675 03.DOI:10.1520/D1675-03R11.
13、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 ASTM website.3Available from American National Standards Institute(ANSI),25 W.4
14、3rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.2 Variations in these methods or alternate contemporarymethods of measurement may be used to determine the valuesfor the properties i
15、n this standard provided such methodsensure quality levels and measurement accuracy equal to orbetter than those prescribed herein.It is the responsibility ofthe organizations using alternate test methods to be able todemonstrate this condition.In cases of dispute,the methodsspecified herein shall b
16、e used.NOTE2Provision for alternate methods is necessary because of(1)thedesire to simplify procedures for specific applications,and(2)the desireto eliminate redundant testing and use data generated during manufactur-ing process control,including that generated under Statistical ProcessControl(SPC)conditions,using equipment and methods other than thosespecified herein.An example would be the use of laser micrometers oroptical comparators to measure dimensions.5.Hazards5.1 Lethal voltages may be
