1、Designation: D2903 11An American National StandardStandard Specification forCrosslinked Chlorinated Polyolefin Heat-Shrinkable Tubingfor Electrical Insulation1This standard is issued under the fixed designation D2903; the number immediately following the designation indicates the year oforiginal ado
2、ption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers flexible crosslinked chlori-nated polyolefin
3、 heat-shrinkable tubing used for electricalinsulating purposes. It is supplied in an expanded form and willshrink to the specified diameter when heated.NOTE 1This standard does not have a similar or equivalent IECstandard.1.2 The values stated in inch-pound units are to be regardedas standard. The v
4、alues given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.2.1 In some cases, temperatures are described in degreesCelsius only.2. Referenced Documents2.1 ASTM Standards:2D412 Test Methods for Vulcanized Rubber and Therm
5、o-plastic ElastomersTensionD1711 Terminology Relating to Electrical InsulationD2671 Test Methods for Heat-Shrinkable Tubing for Elec-trical UseD3636 Practice for Sampling and Judging Quality of SolidElectrical Insulating MaterialsE176 Terminology of Fire Standards2.2 Military Standards:3MIL-H-5606 H
6、ydraulic Fluid Petroleum Base, Aircraft,Missile and OrdnanceMIL-T-5624 Turbine Fuel, Aviation, Grades JP4 and JP5MIL-L-7808 Lubrication Oil, Aircraft, Turbine Engine,Synthetic BaseMIL-L-23699 Lubrication Oil, Aircraft, Turbine Engines,Synthetic BaseMIL-A-8243 Anti-Icing and De-Icing Defrosting Fluid
7、MIL-G-5572 Fuel, Aviation, Grades 100 and 1302.3 Federal Standards:SS-S-550 Sodium Chloride, Technical, for Water SofteningUnits33. Terminology3.1 Definitions:3.1.1 For definitions pertaining to electrical insulation, referto Terminology D1711.3.1.2 For definitions pertaining to fire issues, refer t
8、o Ter-minology E176.3.2 Definitions of Terms Specific to This Standard:3.2.1 chlorinated polyolefin, na polymer or polymerblend based on chlorinated polyolefin(s), chlorinated olefincopolymer(s) or chlorinated polybutadiene polymer(s).4. Classification4.1 Type INormal operating temperature.4.2 Type
9、IIExtended operating temperature.5. Ordering Information5.1 When ordering to this specification the purchaser muststate the type, class, and size of the tubing required.6. Materials and Manufacture6.1 The compound used in the manufacture of this heat-shrinkable tubing shall be based on chlorinated p
10、olyolefin asdefined in Section 3, Terminology. The finished compoundshall be free of foreign matter other than antioxidants, flameretardants, processing aids, crosslinking agents, pigments orother additives as appropriate.6.2 The tubing shall be extruded, crosslinked and thenexpanded to the required
11、 dimensions.7. Chemical Property Requirements Chemical PropertyRequirements7.1 The material shall conform to the chemical requirementsspecified in Tables 1 and 2.1This specification is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and is the direct res
12、ponsibility ofSubcommittee D09.07 on Flexible and Rigid Insulating Materials.Current edition approved Aug. 1, 2011. Published August 2011. Originallyapproved in 1970. Last previous edition approved in 2003 as D2903 03. DOI:10.1520/D2903-11.2For referenced ASTM standards, visit the ASTM website, www.
13、astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Naval Publications and Forms Center, 5801 Tabor Ave.,Philadelphia, PA 19120.1*A Summary of Changes sectio
14、n appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.2 Every lot of material manufactured requires testing forflammability, but testing for all the other chemical propertyrequirements shall be conduc
15、ted less frequently or at a fre-quency agreed upon by the purchaser and seller.8. Other Property Requirements8.1 The material shall conform to the mechanical, thermal,and electrical requirements of Table 3.8.2 Every lot of material manufactured shall be tested forheat shock, tensile strength, and el
16、ongation, but testing for allother requirements shall be conducted less frequently or at afrequency agreed upon by the purchaser and seller.9. Dimensional Requirements9.1 Both Type I and Type II tubing shall conform to thedimensional requirements of Tables 4 and 5.10. Workmanship10.1 Chlorinated pol
17、yolefin heat-shrinkable tubing shall behomogeneous and free from flaws and defects and from foreignmatter that have the potential to compromise its performance.11. Sampling11.1 A lot is defined as that material which is processed atthe same time and under essentially the same conditions inaccordance
18、 with this specification and submitted for inspectionat one time.11.2 Inspect a quantity of the end item selected at randomfrom each lot in accordance with Practice D3636 and Table 1.12. Tests and Retests12.1 If the results of any test do not conform to therequirements prescribed in this specificati
19、on, make two addi-tional tests on different specimens from the same lot.12.2 If the results of either of the two additional tests do notconform to the requirements, the purchaser is entitled to rejectthe lot of material. A notice of nonconformance of materialbased on tests made according to this spe
20、cification shall bereported to the manufacturer promptly and in writing.12.3 It is acceptable to replace or rework rejected tubing tocorrect the nonconformances and then resubmit for inspection.Before resubmitting, furnish to the inspector full particularsconcerning previous rejection and action tak
21、en to correct thenonconformances.13. Test Methods13.1 Use the test methods described in Test Methods D2671unless 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 1C (347 62F).14. Inspection14.1 The man
22、ufacturer or purchaser, or both, shall haveavailable all the facilities to enable the complete testing to thisspecification.15. Certification15.1 When agreed upon in writing by the purchaser and aseller, a certification consists of the lot number and a copy ofthe manufacturers test report or a state
23、ment by the seller,accompanied by a copy of the test results, that the material wassampled, tested and inspected in accordance with the provi-sions of the specification. An authorized agent of the seller andmanufacturer shall sign each certification.15.2 When original identity cannot be established,
24、 certifi-cation can only be based on the sampling procedure as definedin Section 11.16. Packaging, Marking, and Shipping16.1 Supply the tubing on spools in lengths of 10 ft (3 m)minimum for all sizes unless otherwise specified.16.2 Package the tubing in conformance with standardcommercial practice u
25、nless otherwise specified. Box each sizeseparately.16.3 Distinctly identify each container of tubing by a tag orlabel. Show the name of the manufacturer, the expanded andrecovered dimensions of the tubing, the length, quantity andother appropriate information.TABLE 1 Sampling Table for Lot Acceptanc
26、e TestsPropertyRequire-mentInspectionLevelAQLSampling Unitof Sleeving, ft(m)Inside diameter as suppliedInside diameter after unre-stricted shrinkageTable 4Table 4S-3S-31.01.04 (1.2)4 (1.2)Wall thickness after shrinkage Table 4 S-3 1.0 4 (1.2)Longitudinal change Table 4 S-2 1.0 4 (1.2)Straight length
27、 size, min 16.1 herein S-3 1.0 single straightlengthWorkmanship 10.1 herein I 4.0 4 (1.2)TABLE 2 Chemical RequirementsPropertyRequirementType I Type IICorrosionMethod A (copper mirror) 16 h at 150 6 2C(302 6 4F)no corrosion no corrosionMethod B (copper contact) 168 h at 1216 2C (250 6 4F)no pitting
28、orblackeningno pitting orblackeningFollowed by test for:Ultimate elongation, min, %, 150Solvent resistance:Type IImmerse 24 h at 246 3C (756 5.4F)Type IIImmerse 24 h at 50 6 2C (122 64F)MIL-T-5624Grade JP-4 fuelMIL-L-7808Lubricating oilMIL-H-5606Hydraulic fluidSS-S-550 Sodium chloride, 5 % solutionM
29、IL-A-8243Anti-icing fluidMIL-L-23699Lubricating oilMIL-G-5572Aviation gasoline 100/130AFollowed by tests for:Tensile strength, min, psi (MPa) 900 (6.2) 1000 (6.9)Ultimate elongation, min, %, 150 200Weight increase, % 25 25Flammability (Procedure A):Time of burning, max, sBurning distance, max, in.15
30、3153Water absorption24 h at 24 6 3C (75 65.4F) by lot, max, %1.0 1.0APerform in gasoline at room temperature (24C) only.D2903 11217. Keywords17.1 crosslinked chlorinated polyolefin heat-shrinkable tub-ing; electrical insulation; heat-shrinkable tubingTABLE 3 Other Property RequirementsPropertyRequir
31、ementType I Type IIRestricted shrinkage, Procedure A1356 2C (275 6 4F) for 30 min2000 Vno cracking, no dielectric breakdown no cracking, no dielectric breakdownDielectric strength, V/mil (V/mm):14 in. through 134 in.2 in. and largerHeat shock:300 (11 800)200 (7870)300 (11 800)200 (7870)Type I at 150
32、 6 2C (302 6 4F) no cracking, flowing, or drippingType II at 200 6 2C (392 6 4F) no cracking, flowing, or drippingLow-temperature flexibility:Procedure A for sizes14 through58Procedure C for sizes34 through 4Mandrels specified in Table 5Type I at 556 2C (67 6 4F)Type II at 706 2C (94 6 4F)no cracksn
33、o cracksTensile strength, min, psi (MPa):Full sections of tubing for sizes14 through12 : 1500 (10.3) 1500 (10.3)Die D, Test Methods D412, for all larger sizesSpeed 20 in./min (500 mm/min)Ultimate elongation, min, % (Class 1) 225 225Simultaneous with tensile strengthHeat resistance:Type I at 100 6 2C
34、 (212 6 4F) for 96 hType II at 121 6 2C (250 6 4F) for 168 hFollowed by tests for:Tensile strength, min, psi (MPa):Elongation, min, %:1200 (8.3)1501200 (8.3)175Volume resistivity, min Vcm,ASpecific gravity, max10101.510111.5Stress modulus (at 200 % strain), max,psi (MPa) 2500 (17.2) 2500 (17.2)Shelf
35、 lifeBmeet Table 4 requirements meet Table 4 requirementsACondition the specimens for 24 h before making the volume resistivity measurement.BThe tubing shall meet Table 4 requirements under the following conditions: 1 month at 40C (104F), 4 months at 30C (86F), and 12 months at 21C (70F).TABLE 4 Dim
36、ensional Requirements (1.75 to 1 Shrink Ratio)As Supplied After Unrestricted ShrinkageNominal Size,in.Inside Diameter, min,in. (mm)Eccentricity,max, %Inside Diameter, max,in. (mm)Wall Thickness,in. (mm)Longitudinal Change,max, %14 0.250 (6.35) 40 0.143 (3.63) 0.035 6 0.010 (0.89 6 0.25) + 1, 1038 0.
37、375 (9.52) 40 0.214 (5.44) 0.040 6 0.010 (1.02 6 0.25) + 1, 1012 0.500 (12.7) 40 0.286 (7.26) 0.048 6 0.015 (1.22 6 0.38) + 1, 1058 0.625 (15.9) 40 0.357 (9.07) 0.052 6 0.015 (1.32 6 0.38) + 1, 1034 0.750 (19.0) 40 0.428 (10.9) 0.057 6 0.015 (1.45 6 0.38) + 1, 1078 0.875 (22.2) 40 0.500 (12.7) 0.065
38、 6 0.015 (1.65 6 0.38) + 1, 101 1.00 (25.4) 40 0.570 (14.5) 0.0706 0.020 (1.78 6 0.51) + 1, 10114 1.25 (31.8) 40 0.714 (18.1) 0.087 6 0.020 (2.21 6 0.51) + 1, 10112 1.50 (38.1) 40 0.857 (21.8) 0.095 6 0.020 (2.41 6 0.51) + 1, 10134 1.75 (44.4) 40 1.000 (25.4) 0.107 6 0.020 (2.72 6 0.51) + 1, 102 2.0
39、0 (50.8) 40 1.140 (29.0) 0.1106 0.020 (2.79 6 0.51) + 1, 103 3.00 (76.2) 40 1.710 (43.4) 0.1256 0.020 (3.18 6 0.51) + 1, 104 4.00 (101.6) 40 2.280 (57.9) 0.1406 0.020 (3.56 6 0.51) + 1, 10TABLE 5 Mandrel Sizes for Low-Temperature FlexibilityNominal Tubing Size, in. Mandrel Diameter, in. (mm)14516 (8
40、)38 to1238 (10)34 to 2716 (11)3to478 (22)D2903 113SUMMARY OF CHANGESCommittee D09 has identified the location of selected changes to this specification since the last issue,D6096 03, that may impact the use of this specification. (Approved August 1, 2011.)(1) Revised Units statement. (2) Revised tex
41、t in sections 7.2, 8.2, 10.1, 12.2, and 12.3.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, an
42、d the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revisi
43、on of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you sh
44、ouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D2903 114
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