ASTM D3296-24

Standard Specification for FEP Resin Tube

ABSTRACT
This specification covers the tubing that is intended for electrical, mechanical, chemical and medical applications manufactured from extrusion resins made from the copolymer of tetrafluoroethylene and hexafluoropropylene. Three types of FEP-fluorocarbon tubing are classified which are differentiated by size schedules: Type I which is tubing based upon the American wire gage, Type II which is tubing based upon fractional inch sizes, and Type III which is tubing of all other sizes. Tubings are further differentiated in accordance to its increasing wall thicknesses in classes which are Class A, Class C, Class D, and Class E. Several properties of tubing such as inside diameter, wall thickness, specific gravity, tensile strength, elongation, dielectric breakdown voltage, dimensional stability, and heat resistance shall be determined by subjecting it to different test methods.
SCOPE
1.1 The tubing is intended for electrical, mechanical, chemical, and medical applications manufactured from extrusion resins made from the copolymer of tetrafluoroethylene and hexafluoropropylene or modified FEP resins containing no more than 2 % by weight of other fluoromonomers. This specification is for virgin material only and does not address recycled material as it is not appropriate for FEP tubing.  
Note 1: Abbreviations are in accordance with Terminology D1600.
Note 2: There is no known ISO equivalent to this standard.  
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
1.3 The following safety hazards caveat pertains only to the test methods 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Mar-2024
• ICS: 23.040.20 - Plastics pipes
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.15 - Thermoplastic Materials

Relations

• Replaces: ASTM D3296-14a(2019) - Standard Specification for FEP-Fluorocarbon Tube
• Effective Date: 01-Apr-2024

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D3296 − 24
Standard Specification for
1
FEP Resin Tube
This standard is issued under the fixed designation D3296; 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.
1. Scope* D792 Test Methods for Density and Specific Gravity (Rela-
tive Density) of Plastics by Displacement
1.1 The tubing is intended for electrical, mechanical,
D883 Terminology Relating to Plastics
chemical, and medical applications manufactured from extru-
D1600 Terminology for Abbreviated Terms Relating to Plas-
sion resins made from the copolymer of tetrafluoroethylene and
3
tics (Withdrawn 2024)
hexafluoropropylene or modified FEP resins containing no
D1675 Test Methods for Polytetrafluoroethylene Tubing
more than 2 % by weight of other fluoromonomers. This
D2116 Specification for FEP Resin Molding and Extrusion
specification is for virgin material only and does not address
Materials
recycled material as it is not appropriate for FEP tubing.
IEEE/ASTM SI 10 American National Standard for Use of
NOTE 1—Abbreviations are in accordance with Terminology D1600.
the International System of Units (SI): The Modern Metric
NOTE 2—There is no known ISO equivalent to this standard.
System
1.2 The values stated in SI units are to be regarded as the
3. Terminology
standard. The values given in parentheses are for information
only.
3.1 Definitions—Definitions of terms used in this specifica-
1.3 The following safety hazards caveat pertains only to the tion shall be in accordance with Terminology D883.
test methods portion, Section 8, of this specification: This
3.2 Definitions of Terms Specific to This Standard:
standard does not purport to address all of the safety concerns,
3.2.1 lot, n—one production run or uniform blend of two or
if any, associated with its use. It is the responsibility of the user
more production runs.
of this standard to establish appropriate safety, health, and
environmental practices and determine the applicability of
4. Classification
regulatory limitations prior to use.
4.1 This specification provides for three types of FEP tubing
1.4 This international standard was developed in accor-
differentiated by size schedules as follows:
dance with internationally recognized principles on standard-
4.1.1 Type I—Tubing based upon the American Wire Gage
ization established in the Decision on Principles for the
(AWG) sizes.
Development of International Standards, Guides and Recom-
4.1.2 Type II—Tubing based upon fractional inch sizes (see
mendations issued by the World Trade Organization Technical
Note 2).
Barriers to Trade (TBT) Committee.
4.1.3 Type III—Tubing of all other sizes, as agreed by buyer
and seller. This type shall conform to the Dimensional Toler-
2. Referenced Documents
ances for FEP Tubing, as listed inTable 3.
2
2.1 ASTM Standards:
4.2 The types are further differentiated in accordance with
D149 Test Method for Dielectric Breakdown Voltage and
increasing wall thicknesses as follows:
Dielectric Strength of Solid Electrical Insulating Materials
4.2.1 Class A—Tubing having walls tabulated in Table 1
at Commercial Power Frequencies
listed as light-weight wall.
D618 Practice for Conditioning Plastics for Testing
4.2.2 Class C—Tubing having walls tabulated in Table 1
listed as standard wall (see Note 3).
4.2.3 Class D—Tubing having walls tabulated in Table 2
1
This specification is under the jurisdiction of ASTM Committee D20 on
listed as chemical tubing.
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
Materials (Section 20.15.12).
4.2.4 Class E—Tubing having walls listed as heavy or
Current edition approved April 1, 2024. Published April 2024. Originally
conforming to the Dimensional Tolerances for FEP Tubing as
approved in 1974. Last previous edition approved in 2019 as D3296 - 14a(2019).
listed in Table 3.
DOI: 10.1520/D3296-24.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D3296 − 24
TABLE 1 Dimensions and Toleran
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D3296 − 14a (Reapproved 2019) D3296 − 24
Standard Specification for
1
FEP-Fluorocarbon FEP Resin Tube
This standard is issued under the fixed designation D3296; 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.
1. Scope Scope*
1.1 The tubing is intended for electrical, mechanical, chemical, and medical applications manufactured from extrusion resins made
from the copolymer of tetrafluoroethylene and hexafluoropropylene (FEP-fluorocarbon). or modified FEP resins containing no
more than 2 % by weight of other fluoromonomers. This specification is for virgin material only and does not address recycled
material as it is not appropriate for FEP tubing.
NOTE 1—Abbreviations are in accordance with Terminology D1600.
NOTE 2—There is no known ISO eqivalentequivalent to this standard.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 The following safety hazards caveat pertains only to the test methods 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, health, and environmental practices and determine the applicability of regulatory
limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at
Commercial Power Frequencies
D618 Practice for Conditioning Plastics for Testing
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D883 Terminology Relating to Plastics
3
D1600 Terminology for Abbreviated Terms Relating to Plastics (Withdrawn 2024)
D1675 Test Methods for Polytetrafluoroethylene Tubing
D2116 Specification for FEP Resin Molding and Extrusion Materials
IEEE/ASTM SI 10 American National Standard for Use of the International System of Units (SI): The Modern Metric System
1
This specification is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic Materials
(Section 20.15.12).
Current edition approved May 1, 2019April 1, 2024. Published May 2019April 2024. Originally approved in 1974. Last previous edition approved in 20142019 as
D3296 - 14a.D3296 - 14a(2019). DOI: 10.1520/D3296-14AR19.10.1520/D3296-24.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
The last approved version of this historical standard is referenced on www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D3296 − 24
TABLE 1 Dimensions and Tolerances for Type I FEP-FluorocarbonFEP Tubing—Dimensions, mm (in.)
Wall Thickness
Inside Diameter Class A Class C
AWG Size
Lightweight Wall Standard Wall
min max nom min max nom min max
24 0.51 (0.020) 0.69 (0.027) 0.152 (0.006) 0.102 (0.004) 0.203 (0.008) 0.305 (0.012) 0.254 (0.010) 0.356 (0.014)
22 0.64 (0.025) 0.81 (0.032) 0.152 (0.006) 0.102 (0.004) 0.203 (0.008) 0.305 (0.012) 0.254 (0.010) 0.356 (0.014)
20 0.81 (0.032) 1.02 (0.040) 0.152 (0.006) 0.102 (0.004) 0.203 (0.008) 0.406 (0.016) 0.330 (0.013) 0.483 (0.019)
19 0.91 (0.036) 1.12 (0.044) 0.152 (0.006) 0.102 (0.004) 0.203 (0.008) 0.406 (0.016) 0.330 (0.013) 0.483 (0.019)
18 1.02 (0.040) 1.25 (0.049) 0.152 (0.006) 0.102 (0.004) 0.203 (0.008) 0.406 (0.016) 0.330 (0.013) 0.483 (0.019)
17 1.14 (0.045) 1.37 (0.054) 0.152 (0.006) 0.102 (0.004) 0.203 (0.008) 0.406 (0.016) 0.330 (0.013) 0.483 (0.019)
16 1.30 (0.051) 1.55 (0.061) 0.152 (0.006) 0.102 (0.004) 0.203
...