ASTM D2903-21

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Designation: D2903 − 18 D2903 − 21
Standard Specification for
Crosslinked Chlorinated Polyolefin Heat-Shrinkable Tubing
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
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
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
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.
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.
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
D2903 − 21
MIL-G-5572 Fuel, Aviation, Grades 100 and 130
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 required dimensions.
6.3 Conditioning:
6.3.1 Unless otherwise specified, all testing for this standard, except flammability, shall be conducted at 23 65°C65 °C (73 6
9°F) 9 °F) and a relative humidity of 50 610 % RH. Flammability testing shall be conducted in still air at a temperature of 15
– 35°C (59 – 95°C) to 35 °C (59 to 95 °C) and a relative humidity of <75 %. All samples shall be preconditioned at 23 6 5°C
5 °C (73 6 9°F) 9 °F) and a relative humidity of 50 6 10 % RH. for a minimum of 30 minutes prior to test.
7. Chemical Property Requirements
7.1 The material shall conform to the chemical requirements specified in Tables 1 and 2.
7.2 Every lot of material manufactured requires testing for flammability, but testing for all the other chemical property
requirements shall be conducted less frequently or at a frequency agreed upon by the purchaser and seller.
8. Other Property Requirements
8.1 The material shall conform to the mechanical, thermal, and electrical requirements of Table 3.
8.2 Every lot of material manufactured shall be tested for heat shock, tensile strength, and elongation, but testing for all other
requirements shall be conducted less frequently or at a frequency agreed upon by the purchaser and seller.
Available from U.S. Government Printing Office, Superintendent of Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http://www.access.gpo.gov.
D2903 − 21
TABLE 1 Sampling Table for Lot Acceptance Tests
Require- Inspection Sampling Unit of
Property AQL
ment Level Sleeving, ft (m)
Require- Inspection Sampling Unit of
Property AQL
ment Level Sleeving, ft (m)
Inside diameter as supplied Table 4 S-3 1.0 4 (1.2)
Inside diameter as supplied Table 4 S-3 1.0 4 (1.2)
Inside diameter after unre- Table 4 S-3 1.0 4 (1.2)
stricted shrinkage
Inside diameter Table 4 S-3 1.0 4 (1.2)
after
unrestricted shrinkage
Wall thickness after Table 4 S-3 1.0 4 (1.2)
shrinkage
Wall thickness after Table 4 S-3 1.0 4 (1.2)
shrinkage
Longitudinal change Table 4 S-2 1.0 4 (1.2)
Straight length size, min 16.1 herein S-3 1.0 single straight
length
Workmanship 10.1 herein I 4.0 4 (1.2)
9. Dimensional Requirements
9.1 Both Type I and Type II tubing shall conform to the dimensional requirements of Tables 4 and 5.
10. Workmanship
10.1 Chlorinated polyolefin heat-shrinkable tubing shall be homogeneous and free from flaws and defects and from foreign matter
that have the potential to compromise its performance.
11. Sampling
11.1 A lot is defined as that material which is processed at the same time and under essentially the same conditions in accordance
with this specification and submitted for inspection at one time.
11.2 Inspect a quantity of the end item selected at random from each lot in accordance with Practice D3636 and Table 1.
12. Tests and Retests
12.1 If the results of any test do not conform to the requirements prescribed in this specification, make two additional tests on
different specimens from the same lot.
12.2 If the results of either of the two additional tests do not conform to the requirements, the purchaser is entitled to reject the
lot of material. A notice of nonconformance of material based on tests made according to this specification shall be reported to the
manufacturer promptly and in writing.
12.3 It is acceptable to replace or rework rejected tubing to correct the nonconformances and then resubmit for inspection. Before
resubmitting, furnish to the inspector full particulars concerning previous rejection and action taken to correct the nonconfor-
mances.
13. Test Methods
13.1 Use the test methods described in Test Methods D2671 unless stated otherwise in Table 2 or Table 3.
13.2 To recover heat-shrinkable tubing in this specification, use a time of 10 min and a temperature of 175 6 1°C 1 °C (347 6
2°F).2 °F).
14. Inspection
14.1 The manufacturer or purchaser, or both, shall have available all the facilities to enable the complete testing to this
specification.
D2903 − 21
TABLE 2 Chemical Requirements
Requirement
Property
Type I Type II
Corrosion
Method A (copper mirror) 16 h at 150 ± 2°C (302 ± 4°F) no corrosion no corrosion
Method A (copper mirror) 16 h at 150 ± 2 °C (3
...