ASTM_D_1305_-_16_2022.pdf

Designation:D130516(Reapproved 2022)Standard Specification forElectrical Insulating Paper and PaperboardSulfate(Kraft)Layer Type1This standard is issued under the fixed designation D1305;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.1.Scope1.1 This specification covers electrical grade unsized,un-bleached sulfate paper and paperboard for use as layer insula-tion in coils,transformers,and similar apparatus.Other appli-cations include,but are not limited to,turn insulation,slotliners,wedges,phase insulation,and separator papers instranded wire/cable constructions.Tissue for the manufactureof capacitors is not included in this specification.Othercommonly used designations include:1.1.1 Soft Coil Wrap,1.1.2 Dense Coil Wrap,1.1.3 Kraft Coil Insulation,1.1.4 Dry-Finished Kraft,and1.1.5 Water-Finished Kraft.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 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:2D202 Test Methods for Sampling and Testing UntreatedPaper Used for Electrical InsulationD1711 Terminology Relating to Electrical Insulation3.Terminology3.1 DefinitionsFor definitions of terms used in thisstandard,refer to Terminology D1711.4.Classification4.1 Four types of paper and paperboard are covered by thisspecification,as shown in Table 1.The material is available insheets,pads,or rolls.5.Ordering Information5.1 Orders shall specify the type,including whether waterfinish or not(see Note 1),nominal thickness,form,width,length(for sheets),nominal outside diameter,and core insidediameter(for rolls).NOTE1Water finish is not available with certain combinations ofKraft type and thickness.In general,water finish is restricted to paper andpaperboard in the higher density ranges,that is,Types III and IV.6.Materials6.1 The material shall be natural unbleached sulfate paper orpaperboard,free of dyes,pigments,fillers,or sizing.It isfurnished either with water-finish or without.7.Detail Requirements7.1 The material shall conform to the chemical,physical,and electrical requirements specified in Tables 1-4,when testedin accordance with the methods prescribed in Section 11.8.Interpretation of Numerical Requirements8.1 Unless otherwise stated,all specified limits in thisspecification apply to the average of determinations applicableto a sample as defined.9.Workmanship,Finish,and Appearance9.1 The material shall be uniform in thickness,density,formation,and texture.The material shall be as free of welts,wrinkles,creases,holes,slime spots,stains,shives,weak spots,blisters,tears,cuts,and other defects;and from resin,dirt,carbon,rubber,metal particles,corrosive substances,or otherforeign material,as consistent with good manufacturing pro-cesses and in keeping with the requirements of this specifica-tion.Rolls and pads shall be compactly wound.Splices shall be1This specification is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and is the direct responsibility ofSubcommittee D09.01 on Electrical Insulating Products.Current edition approved May 1,2022.Published May 2022.Originallyapproved in 1954.Last previous edition approved in 2016 as D1305 16.DOI:9910.1520/D1305-16R22.2For 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.Copyright 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.1kept to a minimum.Splicing compounds shall be noncorrosiveand shall have no deleterious effect on the insulating ordielectric values of the paper.10.Sampling10.1 Sample the paper in accordance with Test MethodsD202.11.Test Methods11.1 The properties of the paper shall be determined inaccordance with Test Methods D202,except workmanship andappearance shall be visually judged.12.Packaging and Package Marking12.1 PackagingThe material shall be wound on a one-piece