1、Designation:D290321Standard Specification forCrosslinked Chlorinated Polyolefin Heat-Shrinkable Tubingfor Electrical Insulation1This standard is issued under the fixed designation D2903;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision
2、,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.1.Scope*1.1 This specification covers flexible crosslinked chlori-nated polyolefin heat-shrinkable tubing used for electr
3、icalinsulating purposes.It is supplied in an expanded form and willshrink to the specified diameter when heated.NOTE1This standard does not have a similar or equivalent IECstandard.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematica
4、lconversions to SI units that are provided for information onlyand are not considered standard.1.2.1 In some cases,temperatures are described in degreesCelsius only.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established
5、 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:2D412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTens
6、ionD1711 Terminology Relating to Electrical InsulationD2671 Test Methods for Heat-Shrinkable Tubing for Elec-trical UseD3636 Practice for Sampling and Judging Quality of SolidElectrical Insulating MaterialsE176 Terminology of Fire StandardsD8355 Test Methods for Flammability of Electrical Insulat-in
7、g Materials Used for Sleeving or Tubing2.2 Military Standards:3MIL-H-5606 Hydraulic Fluid Petroleum Base,Aircraft,Mis-sile and OrdnanceMIL-T-5624 Turbine Fuel,Aviation,Grades JP4 and JP5MIL-L-7808 Lubrication Oil,Aircraft,Turbine Engine,Syn-thetic BaseMIL-L-23699 Lubrication Oil,Aircraft,Turbine Eng
8、ines,Synthetic BaseMIL-A-8243 Anti-Icing and De-Icing Defrosting FluidMIL-G-5572 Fuel,Aviation,Grades 100 and 1302.3 Federal Standards:4SS-S-550 Sodium Chloride,Technical,for Water SofteningUnits3.Terminology3.1 Definitions:3.1.1 For definitions pertaining to electrical insulation,referto Terminolog
9、y D1711.3.1.2 For definitions pertaining to fire issues,refer to Ter-minology E176.3.2 Definitions of Terms Specific to This Standard:3.2.1 chlorinated polyolefin,na polymer or polymerblend based on chlorinated polyolefin(s),chlorinated olefincopolymer(s)or chlorinated polybutadiene polymer(s).4.Cla
10、ssification4.1 Type INormal operating temperature.4.2 Type IIExtended operating temperature.5.Ordering Information5.1 When ordering to this specification the purchaser muststate the type,class,and size of the tubing required.6.Materials and Manufacture6.1 The compound used in the manufacture of this
11、 heat-shrinkable tubing shall be based on chlorinated polyolefin as1This specification is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and is the direct responsibility ofSubcommittee D09.07 on Electrical Insulating Materials.Current edition approved J
12、an.1,2021.Published February 2021.Originallyapproved in 1970.Last previous edition approved in 2018 as D2903 18.DOI:10.1520/D2903-21.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume informati
13、on,refer to the standards Document Summary page onthe ASTM website.3Available from DLA Document Services,Building 4/D,700 Robbins Ave.,Philadelphia,PA 19111-5094,http:/quicksearch.dla.mil.4Available from U.S.Government Printing Office,Superintendent ofDocuments,732 N.Capitol St.,NW,Washington,DC 204
14、01-0001,http:/www.access.gpo.gov.*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 princi
15、ples 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.1defined in Section 3,Terminology.The finished compoundshall be free of foreign
16、matter other than antioxidants,flameretardants,processing aids,crosslinking agents,pigments orother additives as appropriate.6.2 The tubing shall be extruded,crosslinked and thenexpanded to the required dimensions.6.3 Conditioning:6.3.1 Unless otherwise specified,all testing for thisstandard,except flammability,shall be conducted at 23 65 C(73 6 9 F)and a relative humidity of 50 610%RH.Flammability testing shall be conducted in still air at atemperature of 15 to 35 C(59 to 95 C)and a relativehum
