1、Designation:D2100/D2100M95(Reapproved 2009)1Standard Specification forAsbestos Textiles Used for Electrical Insulating Purposes1This standard is issued under the fixed designation D2100/D2100M;the number immediately following the designation indicates theyear of original adoption or,in the case of r
2、evision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEUnits information was corrected editorially in March 2010.1.Scope1.1 This specification covers asbestos texti
3、le materials usedfor electrical insulating purposes having a minimum of 80%asbestos fiber,by mass,excluding the mass of other inorganicreinforcing material that may be present.NOTE1Specifications for other asbestos textile products are coveredin Specifications D299,D315,D375,D1061,and D1571.1.2 The
4、values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard
5、.1.3 WarningBreathing of asbestos dust is hazardous.Asbestos and asbestos products present demonstrated healthrisks for users and for those with whom they come into contact.In addition to other precautions,when working with asbestos-cement products,minimize the dust that results.For informa-tion on
6、the safe use of chrysoltile asbestos,refer to“Safe Useof Chrysotile Asbestos:A Manual on Preventive and ControlMeasures.”21.4 The following safety hazards caveat pertains only to thetest methods,Section 10,described in this specification:Thisstandard does not purport to address all of the safety con
7、cerns,if any,associated with its use.It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.For specific safety hazard,see 1.3.2.Referenced Documents2.1 ASTM Standards:3D123 Term
8、inology Relating to TextilesD299 Specification for Asbestos YarnsD315 Specification for Woven Asbestos TapeD375 Specification for Asbestos RovingD1061 Specification for Asbestos LapD1118 Test Method for Magnetic Rating of Asbestos Fiberand Asbestos TextilesD1571 Specification for Woven Asbestos Clot
9、hD1918 Test Method for Asbestos Content of Asbestos Tex-tilesD2946 Terminology for Asbestos and AsbestosCementProducts3.Terminology3.1 For definitions of other textile terms used in thisspecification,refer to Terminology D123.For asbestos terms,refer to Terminology D2946.3.2 Definitions:3.2.1 asbest
10、os,n1.general a group of impure silicateminerals occurring in fibrous form.2.textilethe hydrousmagnesiumsilicateserpentinemineraldesignatedaschrysotile,and having the empirical formula Mg3Si2O5(OH)4.4.Classification4.1 TypesThe types of asbestos textiles used for electricalinsulating purposes are ba
11、sed on the following magnetic ratingas determined by Test Method D1118:TypeMaximum Magnetic RatingII0.75IV2.0VI4.01This specification is under the jurisdiction of ASTM Committee C17 onFiber-Reinforced Cement Productsand is the direct responsibility of SubcommitteeC17.03 on Asbestos-Cement Sheet Prod
12、ucts and Accessories.Current edition approved Nov.1,2009.Published March 2010.Originallyapproved in 1962.Last previous edition approved in 2004 as D 2100-95(2004)1.DOI:10.1520/D2100_D2100M-95R09E01.2Available from The Asbestos Institute,http:/ referenced ASTM standards,visit the ASTM website,www.ast
13、m.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 States1 4.2 GradesThe gra
14、des of asbestos textiles used for elec-trical insulating purposes are based on the percentage ofasbestos content by mass as stated in Table 1.4.3 Significance of Types and Grades:4.3.1 The types of asbestos textiles roughly define theelectromagnetic characteristics of the material.Generally,thehighe
15、r the magnetic rating,the poorer the electrical insulatingproperties of the material.The three types have the followingintended applications:4.3.1.1 Type II is intended for applications where the asbes-tos is of primary importance,such as electrical insulation usedon magnetic wire and when used prin
16、cipally as a dielectric.4.3.1.2 Type IV is intended for use where the asbestos is ofsecondary importance as electrical insulation or where,asprimary electrical insulation,it is applied relatively thicklyusually in combination with other materials of comparablyhigh dielectric strength,as in the construction of heat andflame-resistant electrical insulating walls over unit conductorsof electrical cables.4.3.1.3 Type VI is intended for use where the asbestos is ofminor importance as a dielectric,as