1、Designation:D329515Standard Specification forPTFE Tubing,Miniature Beading and Spiral Cut Tubing1This standard is issued under the fixed designation D3295;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A nu
2、mber in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This specification covers PTFE tubing,miniature bead-in
3、g and spiral cut tubing-manufactured from PTFE resinproduced from dispersion specified in Specification D4895.NOTE1PTFE tube and rod manufactured from resin specified inSpecification D4894 are covered in Specification D1710.1.2 The values stated in SI units are to be regarded asstandard.The inch-pou
4、nd units given in parentheses are forinformation only.1.3 The following hazard caveat pertains only to the testmethod portion,Section 8,of this specification:This standarddoes not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the user of thi
5、sstandard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations priorto use.1.4 As PTFE resin produced from dispersion is not a truethermoplastic material,any reuse for the specification refer-enced above is impossible.However,markets do exist
6、fornon-virgin PTFE as additives and fillers.NOTE2There is no known ISO equivalent to this standard.2.Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD638 Test Method for Tensile Properties of PlasticsD792 Test Methods for Density and Specific Gravity(Rela-t
7、ive Density)of Plastics by DisplacementD883 Terminology Relating to PlasticsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD1675 Test Methods for Polytetrafluoroethylene TubingD1708 Test Method for Tensile Properties of Plastics by Useof Microtensile SpecimensD1710 Specification for Ext
8、ruded Polytetrafluoroethylene(PTFE)Rod,Heavy Walled Tubing and Basic ShapesD3892 Practice for Packaging/Packing of PlasticsD4894 Specification for Polytetrafluoroethylene(PTFE)Granular Molding and Ram Extrusion MaterialsD4895 Specification for Polytetrafluoroethylene(PTFE)Resin Produced From Dispers
9、ion3.Terminology3.1 DefinitionsThe terminology given in TerminologiesD883 and D1600 is applicable to this specification.3.2 Description of Term Specific to This Standard:3.2.1 lota single production run,or a uniform blend of twoor more production runs.4.Classification4.1 This specification provides
10、for five groups of PTFEtubing,miniature beading and spiral cut tubing,differentiatedby size and type.The groups are further subdivided into classesbased on wall thickness.4.1.1 Group 01Tubing based upon the American WireGage(AWG)sizes.4.1.2 Group 02Tubing based upon fractional inch sizes.4.1.3 Group
11、 03Tubing specified by inner diameter andwall thickness in Table 6 referred to as“Custom or Metric.”4.1.4 Group 04Tubing cut to form spiral wrap as in Table7.4.1.5 Group 05Miniature beading having diameters aslisted in Table 8.4.2 The types are further differentiated in accordance withincreasing wal
12、l thickness as follows:4.2.1 Class 1Tubing having walls tabulated in Table 1listed as light wall.4.2.2 Class 2Tubing having walls of greater thicknessthan Class 1 listed as thin wall.4.2.3 Class 3Tubing having walls tabulated in Table 2listed as standard wall.4.2.4 Class 4Tubing having walls tabulat
13、ed in Table 3listed as chemical tubing.1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.15 on ThermoplasticMaterials(Section D20.15.12).Current edition approved Sept.1,2015.Published September 2015.Originallyapproved
14、in 1974.Last previous edition approved in 2011 as D3295-06(2011).DOI:10.1520/D3295-15.2For 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
15、 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 4.2.5 Class 5Tubing having walls tabulated in Table 2 andTable 3 listed as heavy wall.4.3 A one-line syst
16、em may be used to specify materialscovered by this specification.The system uses predefined cellsto refer to specific aspects of this specification,as illustratedbelow.SpecificationStandard Number:BlockGroup:Class:Grade:Special NotesExample:SpecificationD3295 0101124For this example,the line callout would be SpecificationD3295 01,01124 and would specify tubing having wallsTABLE 1 Dimensions and Tolerances for Group 01 PTFE Tubing,mm(in.)(Classes 1 and 2)AWG SizeGradeInside DiameterClass 1Light W
