ASTM D2902-21

Standard Specification for Fluoropolymer Resin Heat-Shrinkable Tubing for Electrical Insulation

ABSTRACT
This specification applies to flexible fluoropolymer resin heat-shrinkable extruded tubing made from tetrafluoroethylene resin, copolymer of tetrafluoroethylene and hexafluoropropylene (FEP), and from perfluoroalkoxy (PFA) resin for use as electrical insulation. This specification covers three types of tubings, namely: Type I tubing, normally made by paste extrusion, and Type II and Type III tubings, normally made by melt extrusion. The finished compound shall be free of all foreign matter other than intended formulation additives. The material shall conform to the specified chemical and physical property requirements such as: (1) restricted shrinkage, (2) specific gravity, (3) longitudinal change, (4) tensile modulus at elongation, (5) volume resistivity, (6) dielectric breakdown voltage, (7) heat resistance, (8) low-temperature flexibility, and (9) melting point. The dimensional requirements after unrestrictive shrinkage such as inside diameter, wall thickness, and stock lengths are specified. The sampling and test methods to determine conformance to the specified requirements are given.
SCOPE
1.1 This specification applies to flexible heat-shrinkable extruded tubing made from tetrafluoroethylene resin, copolymer of tetrafluoroethylene and hexafluoropropylene, and from perfluoroalkoxy resin for use as electrical insulation. This specification excludes crosslinked poly(vinylidene fluoride) and poly(vinylidene fluoride) copolymer which are covered under Specification D3144.
Note 1: This standard is similar but not identical to IEC 60684-3-240.  
1.2 The values stated in inch-pound units are to be regarded as standard, except temperature, which shall be stated in degrees Celsius. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 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: 28-Feb-2021
• ICS: 29.035.20 - Plastics and rubber insulating materials
• ICS: 83.140.10 - Films and sheets
• Technical Committee: D09 - Electrical and Electronic Insulating Materials
• Drafting Committee: D09.07 - Electrical Insulating Materials

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:D2902 −21
Standard Specification for
Fluoropolymer Resin Heat-Shrinkable Tubing for Electrical
1
Insulation
This standard is issued under the fixed designation D2902; 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* D3144 Specification for Crosslinked Poly(Vinylidene Fluo-
ride) Heat-Shrinkable Tubing for Electrical Insulation
1.1 This specification applies to flexible heat-shrinkable
D3307 Specification for Perfluoroalkoxy (PFA) Resin Mold-
extruded tubing made from tetrafluoroethylene resin, copoly-
ing and Extrusion Materials
mer of tetrafluoroethylene and hexafluoropropylene, and from
D3636 Practice for Sampling and Judging Quality of Solid
perfluoroalkoxy resin for use as electrical insulation. This
Electrical Insulating Materials
specification excludes crosslinked poly(vinylidene fluoride)
D4895 Specification for Polytetrafluoroethylene (PTFE)
and poly(vinylidene fluoride) copolymer which are covered
Resin Produced From Dispersion
under Specification D3144.
E176 Terminology of Fire Standards
NOTE 1—This standard is similar but not identical to IEC 60684-3-240.
3
2.2 IEC Standards:
1.2 The values stated in inch-pound units are to be regarded
IEC 60684-3-240 Flexible insulating sleeving - Part 3:
as standard, except temperature, which shall be stated in
Specifications for individual types of sleeving - Sheets
degrees Celsius. The values given in parentheses are math-
240 to 243: Heat-shrinkable PTFE sleeving
ematical conversions to SI units that are provided for informa-
tion only and are not considered standard.
3. Terminology
1.3 This international standard was developed in accor-
3.1 Definitions:
dance with internationally recognized principles on standard-
3.1.1 For definitions pertaining to electrical insulation, refer
ization established in the Decision on Principles for the
to Terminology D1711.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical 3.1.2 For definitions pertaining to fire standards, refer to
Barriers to Trade (TBT) Committee.
Terminology E176.
2. Referenced Documents
4. Classification
2
2.1 ASTM Standards:
4.1 Type I—Tubing made from tetrafluoroethylene polymer
C618 Specification for Coal Fly Ash and Raw or Calcined
(TFE) and capable of being heat shrunk at a temperature of
Natural Pozzolan for Use in Concrete
327 °C (621 °F).
D638 Test Method for Tensile Properties of Plastics
4.2 Type II—Tubing made from a copolymer of tetrafluoro-
D1711 Terminology Relating to Electrical Insulation
ethylene and hexafluoropropylene (FEP) and capable of being
D2116 Specification for FEP Resin Molding and Extrusion
Materials heat shrunk at a temperature of 150 °C (302 °F).
D2671 Test Methods for Heat-Shrinkable Tubing for Elec-
4.3 Type III—Tubing made from perfluoroalkoxy resin
trical Use
(PFA) and capable of being heat shrunk at a temperature of
175 °C (347 °F).
1
This specification is under the jurisdiction of ASTM Committee D09 on
5. Ordering Information
Electrical and Electronic Insulating Materials and is the direct responsibility of
Subcommittee D09.07 on Electrical Insulating Materials.
5.1 When ordering to this specification, the purchaser must
Current edition approved March 1, 2021. Published May 2021. Originally
ε1 state the size, and type of the required tubing.
approved in 1970. Last previous edition approved in 2013 as D2902 – 00 (2013) .
DOI: 10.1520/D2902-21.
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 Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.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 ----------------------
D2902−21
TABLE 2 Mandrel Sizes for Low-temperature Flexibility Testing
6. Materials and Manufacture
Nominal Tubing Inside Diameter (Max
6.1 The compound used in the manufacture of this tubing Mandrel Diameter
After Unrestricted Shrinkage)
shall be modified fluoropolymer resin, and the finished com-
in. (mm) in. (mm)
pound shall be free of all foreign matter other than intended
0.015 to 0.125 (0.38 to 3.2)
...

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.
´1
Designation: D2902 − 00 (Reapproved 2013) D2902 − 21 An American National Standard
Standard Specification for
Fluoropolymer Resin Heat-Shrinkable Tubing for Electrical
1
Insulation
This standard is issued under the fixed designation D2902; 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
ε NOTE—Language was changed editorially in January 2013.
1. Scope Scope*
1.1 This specification applies to flexible heat-shrinkable extruded tubing made from tetrafluoroethylene resin, copolymer of
tetrafluoroethylene and hexafluoropropylene, and from perfluoroalkoxy resin for use as electrical insulation. This specification
excludes crosslinked poly(vinylidene fluoride) and poly(vinylidene fluoride) copolymer which are covered under Specification
D3144.
NOTE 1—This standard is similar but not identical to IEC 60684–3–240 to –243.60684-3-240.
1.2 The values stated in inch-pound units are to be regarded as the standard standard, except temperature, which shall be stated
in degrees Celsius. Values The values given in parentheses are for information only. mathematical conversions to SI units that are
provided for information only and are not considered standard.
1.3 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:
C618 Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete
D638 Test Method for Tensile Properties of Plastics
D1711 Terminology Relating to Electrical Insulation
D2116 Specification for FEP Resin Molding and Extrusion Materials
D2671 Test Methods for Heat-Shrinkable Tubing for Electrical Use
D3144 Specification for Crosslinked Poly(Vinylidene Fluoride) Heat-Shrinkable Tubing for Electrical Insulation
D3307 Specification for Perfluoroalkoxy (PFA) Resin Molding and Extrusion Materials
D3636 Practice for Sampling and Judging Quality of Solid Electrical Insulating Materials
D4895 Specification for Polytetrafluoroethylene (PTFE) Resin Produced From Dispersion
E176 Terminology of Fire Standards
1
This specification is under the jurisdiction of ASTM Committee D09 on Electrical and Electronic Insulating Materials and is the direct responsibility of Subcommittee
D09.07 on Electrical Insulating Materials.
Current edition approved Jan. 15, 2013March 1, 2021. Published February 2013May 2021. Originally approved in 1970. Last previous edition approved in 20062013 as
ε1
D2902 – 06.D2902 – 00 (2013) . DOI: 10.1520/D2902-00R13E01.10.1520/D2902-21.
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.
*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 ----------------------
D2902 − 21
3
2.2 IEC Standards:
60684–3–240 to –243IEC 60684-3-240 Flexible insulating sleeving, Part 3, sleeving - Part 3: Specifications for individual types
of sleeving - Sheets 240 to 243: Heat-shrinkable PTFE sleeving
3. Terminology
3.1 Definitions:
3.1.1 For definitions pertaining to electrical insulation, refer to Terminology D1711.
3.1.2 For definitions pertaining to fire standards, refer to Terminology E176.
3.1 Definitions:
3.1.1 For definitions pertaining to electrical insulation, refer to Terminology D1711.
3.1.2 For definitions pertaining to fire standards, refer to Terminology E176.
4. Classification
4.1 Type I—Tubing made from tetrafluoroethylene polymer (TFE) and capable of being heat shrunk at a temperature of 327°C
[621°F].327 °C (621 °F).
4.2 Type II—Tubing made from a copolymer of tetrafluoroethylene and hexafluoropropylene (FEP) and capable of being heat
shrunk at a temperature of 150°C [302°F].150 °C (302 °F).
4.3 Type III—Tubing made from perfluoroalkoxy resin (PFA) and capable of being heat shrunk at a temperature of 175°C
[347°F].175 °C (347 °F).
5. Ordering Information
5.1 When ordering
...