1、Designation: D6867 03 (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
2、 revision. 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 documen
3、t specifies 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 ap
4、propriate for PFA tubing.NOTE 1Abbreviations are in accordance with Terminology D1600.NOTE 2There 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 cave
5、at pertains only to 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 t
6、he applicability of regulatory 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 Termino
7、logy forAbbreviated Terms Relating to Plas-ticsD1675 Test Methods for Polytetrafluoroethylene TubingD3307 Specification for Perfluoroalkoxy (PFA)-Fluorocarbon Resin Molding and Extrusion MaterialsD4894 Specification for Polytetrafluoroethylene (PTFE)Granular Molding and Ram Extrusion MaterialsIEEE/A
8、STM SI 10 Standard for Use of 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 o
9、f one size sheet ormolded basic shape.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
10、7.1.3.1 and 7.1.3.2.4.3 The specific 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 tub
11、ing shall remain free from cracks and exhibit 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 consideredsuffic
12、ient for testing each batch. The average result 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 editi
13、on approved Oct. 1, 2014. Published October 2014. 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
14、of ASTMStandards volume information, refer to the standards 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
15、, PA 19428-2959. United States17. Test Methods7.1 The properties 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 bee
16、n exposed to temperatures below 20Cwithin 24 h prior to test, the conditioning 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
17、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 ThicknessDetermine the wall thickness inacco
18、rdance with the procedures described in Test MethodD1675, except that no individual measurements shall beallowed to exceed the tolerances specified in Table 1.7.1.4 Specific GravityDetermine the specific gravity inaccordance with MethodAof Test Methods D792.Add 2 dropsof wetting agent (liquid deterg
19、ent) to the water in order toreduce the surface tension and ensure complete wetting of thespecimen.7.1.5 Tensile Strength and ElongationDetermine the ten-sile strength and elongation as specified in 7.1.5.1 7.1.5.3 onfive transverse specimens, using a testing speed of 50.8 mm (2in.)/min. Average the
20、 test results for the longitudinal and thetransverse specimens separately. Discard specimens that breakin the jaws of the tension tester, and make new tests.7.1.5.1 Tubing Having an Inside Diameter of 15.9 mm(0.625 in.) and OverDetermine the tensile strength andelongation in both the longitudinal an
21、d transverse directions inaccordance with Specification D4894.7.1.5.2 Tubing Having an Inside Diameter less than 15.9mm (0.625 in.) to 2.3 mm (0.090 in.) InclusiveDetermine thetensile strength and elongation in the longitudinal direction inaccordance with Specification D4894. For longitudinalspecime
22、ns, slit the tubing parallel to the axis and flatten out,prior to punching out specimens.7.1.5.3 Tubing Having an Inside Diameter less than 2.3 mm(0.090 in.)Test specimens as filaments. Make nonsliptypeloop knots in each end of the specimen so that there are 34.9mm (138 in.) between the knots of the
23、 loops (see Fig. 1). Placeloops over the drum of a standard wire specimen holder in thetension-testing machine and pull in this position.7.1.6 Dimensional StabilityCut three specimens each 305mm (12 in.) long, measured to the nearest 1.6 mm (116 in.).Place the specimens in a circulating-air oven at
24、200 6 2C for3 h. Then remove the specimens from the oven and allow tocool to 23 6 2C (73.4 6 3.6F). Again measure the length tothe nearest 1.6 mm (116 in.). Calculate the change in length asa percentage of the original length.8. Inspection and Certification8.1 The tubing shall be visually and dimens
25、ionally in-spected to verify compliance with the requirements of thisspecification.8.2 For all products, the purchaser shall be furnished acertification that this lot is made from only virgin PFA and thatthe sample representing each lot has been either tested orinspected as directed in this specific
26、ation and the requirementsTABLE 1 Dimensions and Tolerances for PFA-Fluorocarbon Tubing-Dimensions, mm (in.)Inside Diameter Wall ThicknessNominal Inside Diameter,mm (in.)Inside Diameter Tolerance,mm (in.)Nominal Thickness,mm (in.)Thickness Tolerance,mm (in.)0 to 0.25 (0.000 to 0.010) 0.03 (0.001) 0
27、to 0.13 (0.000 to 0.005) 0.030 (0.001)0.26 to 0.50 (0.011 to 0.020) 0.05 (0.002) 0.14 to 0.30 (0.006 to 0.012) 0.050 (0.002)0.51 to 0.75 (0.021 to 0.030) 0.08 (0.003) 0.31 to 0.48 (0.013 to 0.019) 0.080 (0.003)0.76 to 2.54 (0.031 to 0.100) 0.10 (0.004) 0.49 to 0.74 (0.020 to 0.029) 0.100 (0.004)2.55
28、 to 4.32 (0.101 to 0.170) 0.13 (0.005) 0.75 and (0.030 and ) 0.130 (0.005)4.33 to 6.35 (0.171 to 0.250) 0.15 (0.006)6.36 to 19.05 (0.251 to 0.750) 0.18 (0.007)19.06 to 25.39 (0.751 to 0.999) 0.25 (0.010)25.4 and (1.000 and ) 0.38 (0.015)FIG. 1 Tension Specimen for Tubing Less Than 2.29 mm (0.090 in.
29、)D6867 03 (2014)2have been met. When specified in the purchase order orcontract, a report of the test results shall be furnished.9. Packaging and Package Marking9.1 PackagingThe material shall be packaged in standardcommercial containers so constructed as to ensure acceptanceby common or other carri
30、er for safe transportation at the lowestrate to the point of delivery, unless otherwise specified in thecontract or order.10. Keywords10.1 extruded material; fluoropolymers; fluoropolymer tub-ing; melt-processible fluorocarbon polymer; PFA extrudedtubing; polytetrafluoroethylene (TFE) copolymersASTM
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