1、Designation: D 2100 95 (Reapproved 2004)e1Standard Specification forAsbestos Textiles Used for Electrical Insulating Purposes1This standard is issued under the fixed designation D 2100; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revisio
2、n, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.e1NOTEAsbestos warning was added as 1.3 in September 2004.1. Scope1.1 This specification covers asbestos textile m
3、aterials usedfor electrical insulating purposes having a minimum of 80%asbestos fiber, by mass, excluding the mass of other inorganicreinforcing material that may be present.NOTE 1Specifications for other asbestos textile products are coveredin Specifications D 299, D 315, D 375, D 1061, and D 1571.
4、1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.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
5、addition to other precautions, when working with asbestos-cement products, minimize the dust that results. For informa-tion on 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
6、 only to thetest methods, Section 10, described in this specification: Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the appli
7、cability of regulatory limita-tions prior to use. For specific safety hazard, see 1.3.2. Referenced Documents2.1 ASTM Standards:3D 123 Terminology Relating to TextilesD 299 Specification for Asbestos YarnsD 315 Specification for Woven Asbestos TapeD 375 Specification for Asbestos RovingD 1061 Specif
8、ication for Asbestos LapD 1118 Test Method for Magnetic Rating of Asbestos Fiberand Asbestos TextilesD 1571 Specification for Woven Asbestos ClothD 1918 Test Method for Asbestos Content of AsbestosTextilesD 2946 Terminology Relating to Asbestos3. Terminology3.1 For definitions of other textile terms
9、 used in thisspecification, refer to Terminology D 123. For asbestos terms,refer to Terminology D 2946.3.2 Definitions:3.2.1 asbestos, n1. generala group of impure silicateminerals occurring in fibrous form. 2. textilethe hydrousmagnesium silicate serpentine mineral designated as chryso-tile, and ha
10、ving the empirical formula Mg3Si2O5(OH)4.4. Classification4.1 TypesThe types of asbestos textiles used for electricalinsulating purposes are based on the following magnetic ratingas determined by Test Method D 1118:Type Maximum Magnetic RatingII 0.75IV 2.0VI 4.04.2 GradesThe grades of asbestos texti
11、les 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, thehigher the magnetic rati
12、ng, 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 principally as a die
13、lectric.1This specification is under the jurisdiction of ASTM Committee C17 onFiber-Reinforced Cement Products and is the direct responsibility of SubcommitteeC17.03 on Asbestos-Cement Sheet Products and Accessories.Current edition approved June 1, 2004. Published July 2004. Originally approvedin 19
14、62. Discontinued November 1982 and reinstated in 1999 as D 2100-95 (1999).Last previous edition approved in 1999 as D 2100-95 (1999).2Available from The Asbestos Institute, http:/ referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For
15、 Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.3.1.2 Type IV is intended for use where the asbestos is ofsecondary i
16、mportance 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 electr
17、ical cables.4.3.1.3 Type VI is intended for use where the asbestos is ofminor importance as a dielectric, as in fillers for heat- andflame-resistant cables, overall wraps or braids for such cables,and linings for enclosures subject to exposure to electric arcs(arc chutes).4.3.2 The grade of asbestos
18、 textile used is largely dependenton the service temperature required of the insulation. Specifictemperature limits for the various grades cannot be given, asthese will depend on the textile construction. In general, thehigher the asbestos content, the higher the temperature thetextile will withstan
19、d.NOTE 2Where breaking strength retention is important, good service-ability at temperatures up to approximately 540C (1000F) can beexpected using the higher grades. If breaking strength retention is notimportant, asbestos textiles may be used in excess of 815C (1500F),depending on the application.5
20、. Ordering Information5.1 Asbestos textiles used for electrical insulating purposesare normally purchased on the basis of type and grade as wellas the properties listed under the Ordering Information sectionof the ASTM specification applicable to that particular asbestosproduct (see Note 1).6. Mater
21、ials and Manufacture6.1 Asbestos textiles used for electrical insulating purposesshall be free of foreign matter not normally present in textiles,which may be detrimental to performance.7. Chemical Composition7.1 Asbestos textiles that have been treated with materials toimpact certain desirable char
22、acteristics, such as moisture resis-tance, flame resistance, and improved electrical insulatingproperties, shall conform to the requirements of this specifica-tion and also to the ASTM specification applicable to thatparticular asbestos treatment, either prior to treatment, or afterremoval of the tr
23、eating material by appropriate methods.7.2 Asbestos content shall conform to requirements in Table1.8. Physical Properties8.1 The magnetic rating shall comply with requirements in4.1.9. Other Requirements9.1 In addition to the requirements of this specification,asbestos textiles to be used for elect
24、rical insulating purposesshall meet the requirements of the ASTM specification appli-cable to that particular asbestos textile product (see Note 1).10. Test Methods10.1 Magnetic RatingDetermine the magnetic rating asdirected in Test Method D 1118.10.2 Asbestos ContentDetermine the asbestos content o
25、fspecimens from each lot or unit taken for test, as directed inTest Method D 1918.11. Rejection and Rehearing11.1 In the absence of certification, proceed as follows:11.1.1 The buyer and the seller may agree on a procedure toestablish conformance, including control charts furnished bythe seller, a s
26、equential sampling plan, or the double-samplingplan outlined in 11.1.2.11.1.2 In the absence of a control-chart or sequential-sampling plan, proceed as directed in 11.1.2.1 through 11.1.2.3.11.1.2.1 If the test results for the lot conform to thetolerance for all characteristics specified in Sections
27、 6-9,consider the lot a valid delivery.11.1.2.2 If the test results for one or more characteristics donot conform to the tolerance, take a new laboratory samplefrom either the original lot sample or a new lot sample. Test thenew sample for the characteristic(s) that did not conform to thetolerances
28、in the first test, and average the results of the firstand second samples as if all results were from one test ofdouble the original number of specimens. If the new average(s)conform(s) to the specified tolerances, consider the lot a validdelivery.11.1.2.3 If the test results obtained as directed in
29、 11.1.2.2 donot conform to the specified tolerances, consider the lot anonvalid delivery.12. Certification12.1 When agreed upon in writing by the purchaser and theseller, a certification shall be made the basis of acceptance ofthe material. This shall consist of a copy of the manufacturerstest repor
30、t or a statement by the seller, accompanied by a copyof the test results, that the material has been sampled, tested,and inspected in accordance with the provisions of the speci-fication. Each certification so furnished shall be signed by anauthorized agent of the seller or manufacturer.12.2 When th
31、e product origin (original identity) cannot beestablished, certification can be based only on the samplingprocedure provided by the applicable specification.12.3 In the absence of certification, proceed as directed in11.1.1 through 11.1.2.3.13. Keywords13.1 asbestos; asbestos textile; electrical ins
32、ulation; electro-magnetic; textileTABLE 1 Grades of Asbestos Textiles Used for ElectricalInsulating PurposesGrade Asbestos Content, mass percentUnderwriters 80 up to but excluding 85A 85 up to but excluding 90AA 90 up to but excluding 95AAA 95 up to but excluding 99AAAA 99 to 100 inclusiveD 2100 95
33、(2004)e12ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such ri
34、ghts, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additiona
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36、M Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D 2100 95 (2004)e13
