Standard Specification for PTFE Tubing, Miniature Beading and Spiral Cut Tubing

ABSTRACT
This specification covers PTFE tubing, miniature beading and spiral cut tubing-manufactured from PTFE resin produced from dispersion. Five groups of PTFE tubing, miniature beading and spiral cut tubing, differentiated by size and type are presented. The groups are further subdivided into classes based on wall thickness: group 01 - tubing based upon the AWG sizes, group 02 - tubing based upon fractional inch sizes, group 03 - tubing based upon inner diameter and wall thickness, group 04 - tubing cut to form spiral wrap, and group 05 - miniature beading. The types are further differentiated in accordance with increasing wall thickness as follows: class 1 - light wall, class 2 - thin wall, class 3 - standard wall, class 4 - chemical tubing, and class 5 - heavy wall. The tubing and miniature beading shall be made of PTFE meeting the requirements prescribed. The melting point, specific gravity, weight loss, tensile strength, elongation, dielectric breakdown voltage, heat resistance, and dimensional stability shall be tested to meet the requirements specified.
SCOPE
1.1 This specification covers PTFE tubing, miniature beading and spiral cut tubing-manufactured from PTFE resin produced from dispersion specified in Specification D4895.  
Note 1—PTFE tube and rod manufactured from resin specified in Specification D4894 are covered in Specification D1710.
1.2 The values stated in SI units are to be regarded as standard. The inch-pound units given in parentheses are for information only.
1.3 The following hazard caveat pertains only to the test method portion, Section 8, of this specification:  This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.  
1.4 As PTFE resin produced from dispersion is not a true thermoplastic material, any reuse for the specification referenced above is impossible. However, markets do exist for non-virgin PTFE as additives and fillers.
Note 2—There is no known ISO equivalent to this standard.

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Publication Date
31-Jan-2011
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ASTM D3295-06(2011) - Standard Specification for PTFE Tubing, Miniature Beading and Spiral Cut Tubing
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D3295 −06(Reapproved 2011)
Standard Specification for
1
PTFE Tubing, Miniature Beading and Spiral Cut Tubing
This standard is issued under the fixed designation D3295; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript 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 D1708 Test Method forTensile Properties of Plastics by Use
of Microtensile Specimens
1.1 This specification covers PTFE tubing, miniature bead-
D1710 Specification for Extruded Polytetrafluoroethylene
ing and spiral cut tubing-manufactured from PTFE resin
(PTFE) Rod, Heavy Walled Tubing and Basic Shapes
produced from dispersion specified in Specification D4895.
D3892 Practice for Packaging/Packing of Plastics
NOTE 1—PTFE tube and rod manufactured from resin specified in
D4894 Specification for Polytetrafluoroethylene (PTFE)
Specification D4894 are covered in Specification D1710.
Granular Molding and Ram Extrusion Materials
1.2 The values stated in SI units are to be regarded as
D4895 Specification for Polytetrafluoroethylene (PTFE)
standard. The inch-pound units given in parentheses are for
Resin Produced From Dispersion
information only.
3. Terminology
1.3 The following hazard caveat pertains only to the test
method portion, Section 8, of this specification: This standard
3.1 Definitions—The terminology given in Terminologies
does not purport to address all of the safety concerns, if any,
D883 and D1600 is applicable to this specification.
associated with its use. It is the responsibility of the user of this
3.2 Description of Term Specific to This Standard:
standard to establish appropriate safety and health practices
3.2.1 lot—asingleproductionrun,orauniformblendoftwo
and determine the applicability of regulatory limitations prior
or more production runs.
to use.
1.4 As PTFE resin produced from dispersion is not a true
4. Classification
thermoplastic material, any reuse for the specification refer-
enced above is impossible. However, markets do exist for
4.1 This specification provides for five groups of PTFE
non-virgin PTFE as additives and fillers.
tubing, miniature beading and spiral cut tubing, differentiated
NOTE 2—There is no known ISO equivalent to this standard.
bysizeandtype.Thegroupsarefurthersubdividedintoclasses
based on wall thickness.
2. Referenced Documents
4.1.1 Group 01—Tubing based upon the American Wire
2
2.1 ASTM Standards:
Gage (AWG) sizes.
D618 Practice for Conditioning Plastics for Testing
4.1.2 Group 02—Tubing based upon fractional inch sizes.
D638 Test Method for Tensile Properties of Plastics
4.1.3 Group 03—Tubing specified by inner diameter and
D792 Test Methods for Density and Specific Gravity (Rela-
wall thickness in Table 6 referred to as “Custom or Metric.”
tive Density) of Plastics by Displacement
4.1.4 Group 04—Tubing cut to form spiral wrap as in Table
D883 Terminology Relating to Plastics
7.
D1600 Terminology forAbbreviatedTerms Relating to Plas-
4.1.5 Group 05—Miniature beading having diameters as
tics
listed in Table 8.
D1675 Test Methods for Polytetrafluoroethylene Tubing
4.2 The types are further differentiated in accordance with
increasing wall thickness as follows:
1
4.2.1 Class 1—Tubing having walls tabulated in Table 1
This specification is under the jurisdiction of ASTM Committee D20 on
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
listed as light wall.
Materials (Section D20.15.12).
4.2.2 Class 2—Tubing having walls of greater thickness
Current edition approved Feb. 1, 2011. Published March 2011. Originally
than Class 1 listed as thin wall.
approved in 1974. Last previous edition approved in 2006 as D3295 - 06. DOI:
10.1520/D3295-06R11.
4.2.3 Class 3—Tubing having walls tabulated in Table 2
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
listed as standard wall.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
4.2.4 Class 4—Tubing having walls tabulated in Table 3
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. listed as chemical tubing.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D3295−06 (2011)
TABLE 1 Dimensions and Tolerances for Group 01 PTFE Tubing, mm (in.) (Classes 1 and 2)
Class 1
Inside Diameter
AWG Size
Light Wall
Grade
min max nom min max
30 0.25 (0.010) 0.38 (0.015) 0.15 (0.006) 0.10 (0.004) 0.20 (0.008)
28 0.33 (0.013) 0.46 (0.018) 0.15 (0.006) 0.10 (0.004) 0.20 (0.008)
26 0.41 (0.
...

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