ASTM_D_2671_-_21.pdf

Designation:D267121Standard Test Methods forHeat-Shrinkable Tubing for Electrical Use1This standard is issued under the fixed designation D2671;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 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.Scope*1.1 These test methods cover the testing of heat-shrinkabletubing used for electrical insulation.Materials used includepoly(vinyl chloride),polyolefins,fluorocarbon polymers,sili-cone rubber,and other plastic or elastomeric compounds.1.2 These test methods appear in the following sections:ProcedureSection(s)TestMethod(s)Adhesive Peel Strength94 100Brittleness Temperature40D746Color55 and 56D1535Color Stability57 62D1535Conditioning7D618Copper Stability89Corrosion Testing85 91Dielectric Breakdown20 25D149Dimensions8 13D876Flammability68D8355(Methods A,C,or D)Fluid Resistance63 67Fungus Resistance100 104Heat Resistance49 54Heat Shock26 30Low-temperature Properties36 43Restricted Shrinkage14 19Selection of Test Specimens6Secant Modulus77 80D882Storage Life31 35Specific Gravity69 and 70D792Stress Modulus81 84D412Tensile Strength and Ultimate Elongation44 48D412Thermal Endurance92 and 93Volume Resistivity71 74D257Water Absorption75 and 76D570Melting Point100 104D34181.3 The values stated in inch-pound units are to be regardedas standard,except for temperature,which shall be expressedin degrees Celsius.The values given in parentheses aremathematical conversions to SI units that are provided forinformation only and are not considered standard.1.4 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 use.For specific hazard statements,see Section 5 and for fire testsafety caveats see Test Methods D8355.NOTE1These test methods are similar,but not identical to,those inIEC 60684-2(see also Note 9).1.5 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 the 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 FrequenciesD257 Test Methods for DC Resistance or Conductance ofInsulating MaterialsD412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD570 Test Method for Water Absorption of PlasticsD618 Practice for Conditioning Plastics for TestingD746 Test Method for Brittleness Temperature of Plasticsand Elastomers by ImpactD792 Test Methods for Density and Specific Gravity(Rela-tive Density)of Plastics by DisplacementD876 Test Methods for Nonrigid Vinyl Chloride PolymerTubing Used for Electrical InsulationD882 Test Method for Tensile Properties of Thin PlasticSheetingD1535 Practice for Specifying Color by the Munsell SystemD1711 Terminology Relating to Electrical InsulationD3418 Test Method for Transition Temperatures and En-thalpies of Fusion and Crystallization of Polymers by1These 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 Jan.1,2021.Published February 2021.Originallyapproved in 1967.Last previous edition approved in 2013 as D2671 13.DOI:10.1520/D2671-21.2For 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.*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 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 Trade(TBT)Committee.1Differential Scanning CalorimetryE176 Terminology of Fire StandardsD8355 Test Methods for Flammability of Electrical Insulat-ing Materials Used for Sleeving or Tubing2.2 IEC Standards:3IEC 216 Guide for the Determination of Thermal EnduranceProperties of Electrical Insulating MaterialsIEC 60684 Specification for Flexible Insulating Sl