ASTM_D_5642_-_09.pdf

Designation:D564209Standard Test Method forSealed Tube Chemical Compatibility Test1This standard is issued under the fixed designation D5642;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.Scope*1.1 This test method covers procedures for evaluating theinteraction of electrical insulation components used,or in-tended to be used,in electrical insulation systems.1.2 This test method is useful for determining compatibilitybut additional testing may be required depending upon appli-cation.1.3 This test method may also provide useful informationabout the behavior of selected insulating materials whencompared to a reference value as opposed to a referencesystem.1.4 This test method does not cover systems which operatein liquids or gases other than air.1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.6 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 and health practices and determine the applica-bility of regulatory limitations prior to use.See also 8.2.4,8.3.1 and 8.3.2.12.Referenced Documents2.1 ASTM Standards:2D149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power FrequenciesD1676 Test Methods for Film-Insulated Magnet WireD1711 Terminology Relating to Electrical Insulation3.Terminology3.1 Definitions:3.1.1 magnet wireSee Terminology D1711 for the defini-tion of this term.3.2 Definitions of Terms Specific to This Standard:3.2.1 aging test,na process of exposure,to a specified setof conditions for a defined period of time,which results in anirreversible change in one or more physical,chemical,electrical,or thermal characteristics of a material.3.2.2 candidate system,nthe proposed electrical insula-tion system to be evaluated.3.2.3 electrical insulation system,nan intimate combina-tion of insulating materials with conductors,as used in elec-trical equipment.3.2.4 insulation system class,na standardized designationof the temperature capability of the electrical insulation sys-tem.It is expressed by both numbers and letters as follows:SystemClass105(A)120(E)130(B)155(F)180(H)200(N)220(R)240(S)3.2.5 reference system,nan electrical insulation systemwhich has been previously evaluated and found acceptable.3.2.6 twisted pair,nfilm-insulated round magnet wire thathas been prepared in accordance with Test Methods D1676.4.Summary of Test Method4.1 Acombination of specific materials is sealed in a limitedspace and subjected to a specific elevated temperature for aspecified time.Following this exposure the dielectric break-down voltage of the insulated conductors is used as a basis forjudging the compatibility of the candidate system.5.Significance and Use5.1 This test method is useful for evaluating a combinationof materials for potential use in an electrical insulation system.6.Apparatus6.1 Oven,capable of maintaining the required exposuretemperature within 63 C.1This test method is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and is the direct responsibility ofSubcommittee D09.17 on Thermal Characteristics.Current edition approved Oct.1,2009.Published November 2009.Originallyapproved in 1994.Last previous edition approved in 2004 as D5642 99(2004).DOI:10.1520/D5642-09.2For 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 States1 6.2 Glass Tubes with inside volume not exceeding 900 mLthat can be sealed.Two general types are described as follows:6.2.1 Flanged High Temperature Glass Tubes which aredesigned to be sealed with metal rings and gaskets arepreferred.6.2.2 Glass Tubes,which can be fusion sealed after theaddition of all materials are acceptable alternatives.6.3 Gasket Materials for use with tubes described in 6.2.1.6.3.1 Type TFE(Tetrafluoroethylene)or FEP(Perfluoroeth-ylene Propylene)Fluorocarbon.6.3.2 Hexafluoropropylenevinylidene fluoride elastomercan be used for exposure temperatures not exceeding 155 C.6.4 Apparatus in conformance with Test Method D149 tomeasure dielectric breakdown voltage.7.Material Specimens7.1 The specific list of materials to be tested is to beestablished by agreement between interested parties.7.2 Represent each of the non-metallic components of theelectrical insulation sy