ASTM D2903-21

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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
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Designation: D2903 − 18 D2903 − 21
Standard Specification for
Crosslinked Chlorinated Polyolefin Heat-Shrinkable Tubing
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for Electrical Insulation
This standard is issued under the fixed designation D2903; 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*
1.1 This specification covers flexible crosslinked chlorinated polyolefin heat-shrinkable tubing used for electrical insulating
purposes. It is supplied in an expanded form and will shrink to the specified diameter when heated.
NOTE 1—This standard does not have a similar or equivalent IEC standard.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.2.1 In some cases, temperatures are described in degrees Celsius only.
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
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2.1 ASTM Standards:
D412 Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—Tension
D1711 Terminology Relating to Electrical Insulation
D2671 Test Methods for Heat-Shrinkable Tubing for Electrical Use
D3636 Practice for Sampling and Judging Quality of Solid Electrical Insulating Materials
E176 Terminology of Fire Standards
D8355 Test Methods for Flammability of Electrical Insulating Materials Used for Sleeving or Tubing
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2.2 Military Standards:
MIL-H-5606 Hydraulic Fluid Petroleum Base, Aircraft, Missile and Ordnance
MIL-T-5624 Turbine Fuel, Aviation, Grades JP4 and JP5
MIL-L-7808 Lubrication Oil, Aircraft, Turbine Engine, Synthetic Base
MIL-L-23699 Lubrication Oil, Aircraft, Turbine Engines, Synthetic Base
MIL-A-8243 Anti-Icing and De-Icing Defrosting Fluid
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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 May 1, 2018Jan. 1, 2021. Published May 2018February 2021. Originally approved in 1970. Last previous edition approved in 20112018 as
D2903 – 11.D2903 – 18. DOI: 10.1520/D2903-18.10.1520/D2903-21.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
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Available from Naval Publications and Forms Center, 5801 TaborDLA Document Services, Building 4/D, 700 Robbins Ave., Philadelphia, PA 19120.19111-5094,
http://quicksearch.dla.mil.
*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
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D2903 − 21
MIL-G-5572 Fuel, Aviation, Grades 100 and 130
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2.3 Federal Standards:
SS-S-550 Sodium Chloride, Technical, for Water Softening Units
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 issues, refer to Terminology E176.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 chlorinated polyolefin, n—a polymer or polymer blend based on chlorinated polyolefin(s), chlorinated olefin copolymer(s)
or chlorinated polybutadiene polymer(s).
4. Classification
4.1 Type I—Normal operating temperature.
4.2 Type II—Extended operating temperature.
5. Ordering Information
5.1 When ordering to this specification the purchaser must state the type, class, and size of the tubing required.
6. Materials and Manufacture
6.1 The compound used in the manufacture of this heat-shrinkable tubing shall be based on chlorinated polyolefin as defined in
Section 3, Terminology. The finished compound shall be free of foreign matter other than antioxidants, flame retardants, processing
aids, crosslinking agents, pigments or other additives as appropriate.
6.2 The tubing shall be extruded, crosslinked and then expanded to the re
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