1、Designation:D686703(Reapproved 2014)Standard Specification forPerfluoroalkoxy(PFA)-Fluoropolymer Tubing1This standard is issued under the fixed designation D6867;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revisi
2、on.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 tubing produced from PFAFluoropolymer resins which are cited in Specification D3307.This document specifies
3、tubing dimensional tolerances,tensileproperties and related electrical properties as noted in theappropriate tables when tested in accordance with the methodscited in this specification.This specification is for virginmaterial only and does not address recycled material,as it isnot appropriate for P
4、FA tubing.NOTE1Abbreviations are in accordance with Terminology D1600.NOTE2There is no known ISO equivalent to this standard.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.3 The following safety hazards caveat pertains only t
5、o thetest methods portion,Section 7,of 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 applicability of reg
6、ulatory require-ments prior to use.2.Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD792 Test Methods for Density and Specific Gravity(Rela-tive Density)of Plastics by DisplacementD883 Terminology Relating to PlasticsD1600 Terminology forAbbreviated Terms
7、Relating to Plas-ticsD1675 Test Methods for Polytetrafluoroethylene TubingD3307 SpecificationforPerfluoroalkoxy(PFA)-Fluorocarbon Resin Molding and Extrusion MaterialsD4894 Specification for Polytetrafluoroethylene(PTFE)Granular Molding and Ram Extrusion MaterialsIEEE/ASTM SI 10 Standard for Use of
8、the InternationalSystem of Units(SI):The Modern Metric System33.Terminology3.1 Definitions:3.1.1 Definitions are in accordance with Terminology D883unless otherwise specified.3.1.2 lot,none continuous production run or a uniformblend of two or more production runs of one size sheet ormolded basic sh
9、ape.4.Physical Requirements4.1 The tubing shall be made of PFA-fluoropolymer resinmeeting the requirements of Specification D3307.4.2 The inside diameter and wall thickness and tolerances ofthe tubing shall be as shown in Table 1,when determined inaccordance with 7.1.3.1 and 7.1.3.2.4.3 The specific
10、 gravity of the tubing shall be between 2.12and 2.17 inclusive when determined in accordance with 7.1.4.4.4 The tubing shall have a minimum tensile strength of10.0 MPa(1500 psi)and a minimum elongation of 200%when determined in accordance with 7.1.5.4.5 The tubing shall remain free from cracks and e
11、xhibit nosplitting when tested for dimensional stability in accordancewith 7.1.6.5.Sampling5.1 Sampling shall be statistically adequate to satisfy therequirements of 8.2.6.Number of Tests and Retests6.1 One set of five test specimens shall be consideredsufficient for testing each batch.The average r
12、esult of thespecimens tested shall conform to the requirements of thisspecification.1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.15 on ThermoplasticMaterials.Current edition approved Oct.1,2014.Published October 2
13、014.Originallyapproved in 2003.Last previous edition approved in 2009 as D6867-03(2014).DOI:10.1520/D6867-03R14.2For 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 stand
14、ards Document Summary page onthe ASTM website.3Available from ASTM International Headquarters,100 Barr Harbor Drive,POBox C700,West Conshohocken,PA 194282959.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 7.Test Methods7.1 The properties
15、 enumerated in this specification shall bedetermined in accordance with the following methods.7.1.1 ConditioningCondition the test specimens at 23 62C(73.4 6 3.6F)for a period of at least 4 h prior to test.Ifthe test material has been exposed to temperatures below 20Cwithin 24 h prior to test,the co
16、nditioning shall be for at least24 h and as outlined in Practice D618.7.1.2 Test ConditionsConduct tests at the standard labo-ratory temperature of 23 6 2C(73.4 6 3.6F),in referee casesthe standard laboratory atmosphere including 50 6 5%RHshall apply.7.1.3 Dimensions and Tolerances:7.1.3.1 Inside DiameterDetermine the inside diameter inaccordance with Test Method D1675,except that no individualmeasurements shall be allowed to exceed the tolerancesspecified in Table 1.7.1.3.2 Wall ThicknessDeterm
