1、Designation: D350 13Standard Test Methods forFlexible Treated Sleeving Used for Electrical Insulation1This standard is issued under the fixed designation D350; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisi
2、on. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope*1.1 These test methods cover procedures for te
3、sting electri-cal insulating sleeving comprising a flexible tubular productmade from a woven textile fibre base, such as cotton, rayon,nylon, or glass, thereafter impregnated, or coated, or impreg-nated and coated, with a suitable dielectric material.1.2 The procedures appear in the following sectio
4、ns:Procedures SectionsBrittleness Temperature 18 to 21Compatibility of Sleeving with Magnet Wire Insulation 45 to 59Conditioning 6Dielectric Breakdown Voltage 12 to 17Dielectric Breakdown Voltage After Short-Time Aging 29 to 33Dimensions 7 to 11Effect of Push-Back After Heat Aging 73 to 78Flammabili
5、ty 22 to 28Hydrolytic Stability 66 to 72Oil Resistance 34 to 37Selection of Test Material 5Solvent Resistance 60 to 65Thermal Endurance 38 to 441.3 The values stated in inch-pound units, except for C, areto be regarded as the standard. The values in parentheses aremathematical conversions to SI unit
6、s that are provided forinformation only and are not considered standard.1.4 This is a fire-test-response standard. See Sections 22through 28, which are the procedures for flammability tests.1.5 This standard measures and describes the response ofmaterials, products, or assemblies to heat and flame u
7、ndercontrolled conditions, but does not by itself incorporate allfactors required for fire hazard or fire risk assessment of thematerials, products or assemblies under actual fire conditions.1.6 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It
8、is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. For specific hazardstatements, see 45.2 and 63.1.1.NOTE 1This standard resembles IEC 60684-2, Specification forFlexible Ins
9、ulating SleevingPart 2 Methods of Test, in a number ofways, but is not consistently similar throughout. The data obtained usingeither standard are not necessarily technically equivalent.1.7 Fire testing is inherently hazardous. Adequate safe-guards for personnel and property shall be employed incond
10、ucting these tests.2. Referenced Documents2.1 ASTM Standards:2D149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power FrequenciesD374 Test Methods for Thickness of Solid Electrical Insu-lation (Withdrawn 2013)3D471 Test Met
11、hod for Rubber PropertyEffect of LiquidsD746 Test Method for Brittleness Temperature of Plasticsand Elastomers by ImpactD876 Test Methods for Nonrigid Vinyl Chloride PolymerTubing Used for Electrical InsulationD1711 Terminology Relating to Electrical InsulationD2307 Test Method for Thermal Endurance
12、 of Film-Insulated Round Magnet WireD3487 Specification for Mineral Insulating Oil Used inElectrical ApparatusD3636 Practice for Sampling and Judging Quality of SolidElectrical Insulating MaterialsD5423 Specification for Forced-Convection Laboratory Ov-ens for Evaluation of Electrical InsulationD605
13、4 Practice for Conditioning Electrical Insulating Mate-rials for Testing (Withdrawn 2012)3E145 Specification for Gravity-Convection and Forced-Ventilation OvensE176 Terminology of Fire Standards1These test methods are under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulatin
14、g Materials and are the direct responsibility ofSubcommittee D09.07 on Flexible and Rigid Insulating Materials.Current edition approved Nov. 1, 2013. Published December 2013. Originallyapproved in 1932. Last previous edition approved in 2009 as D350 09. DOI:10.1520/D0350-13.2For referenced ASTM stan
15、dards, visit the ASTM website, www.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.3The last approved version of this historical standard is referenced onwww.astm.org.*A
16、 Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States12.2 IEEE Standard:IEEE 101 Guide for the Statistical Analysis of Thermal LifeTest Data42.3 IEC Standard:IEC 60684-2 Specifi
17、cation for Flexible InsulatingSleevingPart 2 Methods of Test52.4 ISO Standard:ISO 13943 Fire SafetyVocabulary3. Terminology3.1 Definitions:3.1.1 Use Terminology E176 and ISO 13943 for definitionsof terms used in this test method and associated with fireissues. Where differences exist in definitions,
18、 those containedin Terminology E176 shall be used. Use Terminology D1711for definitions of terms used in this test method and associatedwith electrical insulation materials.3.2 Definitions of Terms Specific to This Standard:3.2.1 size, na numerical designation which indicates thatthe inside diameter
19、 of the sleeving lies within the limitsprescribed in Table 1.3.2.2 wall thickness, none half the difference between theoutside diameter of the sleeving mounted on a loosely fittinggage rod and the diameter of the gage rod when measured inaccordance with 9.2.4. Apparatus and Materials4.1 Ovens used i
20、n these test methods shall meet the require-ments of Specification D5423.5. Selection of Test Material5.1 In the case of sleeving on spools or in coils, not less thanthree turns of the product shall be removed before the selectionof material from which test specimens are to be prepared.5.2 In the ca
21、se of sleeving offered in cut lengths, testspecimens shall not be prepared from material closer than 1 in.(25 mm) from each end.5.3 Specimens for test shall not show obvious defects unlessthe purpose of the test is to determine the effect of such defects.5.4 Specimens shall be prepared from samples
22、selected inaccordance with Practice D3636. The sampling plan andacceptance quality level shall be as agreed upon between theuser and the producer.6. Conditioning6.1 Unless otherwise specified, a standard laboratory atmo-sphere of 50 6 5 % relative humidity and 23 6 2 C (73.4 63.6 F) shall be used in
23、 conducting all tests and for condition-ing specimens for a period of at least 18 h prior to testing.6.2 In the case of dielectric breakdown voltage tests afterhumidity conditioning, specimens shall be conditioned for 96 hin an atmosphere of 93 6 3 % relative humidity and 23 6 2C(73.4 6 3.6 F) befor
24、e testing. If a conditioning cabinet is used,specimens shall be tested for dielectric breakdown voltagewithin 1 min after removal from the cabinet.6.3 For details regarding conditioning, refer to PracticeD6054.DIMENSIONS7. Apparatus7.1 Gage RodsStandard gage rods shall be made of steeland shall have
25、 smooth surfaces and rounded edges. One rod isrequired for each of the maximum and minimum diametersshown in Table 1 for each size. Each rod shall be within60.005 in. (66.012 mm) of the values shown in Table 1.8. Test Specimens8.1 Five test specimens of at least 7 in. (180 mm) in lengthshall be cut
26、from material obtained in accordance with Section5.9. Procedure9.1 Inside DiameterPass the minimum gage rod for thesize sleeving under test into the specimen for a distance of 5 in.(127 mm) without expanding the wall of the sleeving. If the rodhas a snug fit, then consider the specimen as having an
27、insidediameter equal to the diameter of the rod. If the minimum gage4Available from Institute of Electrical and Electronics Engineers, Inc. (IEEE),445 Hoes Ln., P.O. Box 1331, Piscataway, NJ 08854-1331, http:/www.ieee.org.5Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4
28、th Floor, New York, NY 10036, http:/www.ansi.org.TABLE 1 ASTM Standard Sizes for Flexible SleevingSizeInside Diameter, in. (mm)Max Min1 in. 1.036 (26.3) 1.000 (25.4)78 in. 0.911 (23.1) 0.875 (22.2)34 in. 0.786 (20.0) 0.750 (19.1)58 in. 0.655 (16.6) 0.625 (15.9)12 in. 0.524 (13.3) 0.500 (12.7)716 in.
29、 0.462 (11.7) 0.438 (11.1)38 in. 0.399 (10.1) 0.375 (9.5)No. 0 0.347 (8.8) 0.325 (8.3)No. 1 0.311 (7.9) 0.289 (7.3)No. 2 0.278 (7.1) 0.258 (6.6)No. 3 0.249 (6.3) 0.229 (5.8)No. 4 0.224 (5.7) 0.204 (5.2)No. 5 0.198 (5.0) 0.182 (4.6)No. 6 0.178 (4.5) 0.162 (4.1)No. 7 0.158 (4.0) 0.144 (3.7)No. 8 0.141
30、 (3.6) 0.129 (3.3)No. 9 0.124 (3.1) 0.114 (2.9)No. 10 0.112 (2.8) 0.102 (2.6)No. 11 0.101 (2.6) 0.091 (2.31)No. 12 0.091 (2.31) 0.081 (2.06)No. 13 0.082 (2.08) 0.072 (1.83)No. 14 0.074 (1.88) 0.064 (1.63)No. 15 0.067 (1.70) 0.057 (1.45)No. 16 0.061 (1.55) 0.051 (1.30)No. 17 0.054 (1.37) 0.045 (1.14)
31、No. 18 0.049 (1.24) 0.040 (1.02)No. 20 0.039 (0.99) 0.032 (0.81)No. 22 0.032 (0.81) 0.025 (0.64)No. 24 0.027 (0.69) 0.020 (0.51)D350 132rod fits loosely, insert the maximum gage rod into the speci-men. If the maximum gage rod passes freely into the specimenfor a distance of 5 in. with a snug fit, or
32、 if it expands the wallof the specimen, then consider the sleeving to be of that sizewhich falls within the limits of the maximum and minimuminside diameters as represented by the gage rods.9.2 Wall ThicknessInsert in the specimen the largeststandard gage rod that will pass freely into the sleeving.
33、 Applya micrometer over the specimen and make thickness measure-ments as specified in Method C of Test Methods D374 exceptthat the force on the pressor foot shall be 3 oz (85 g). Obtainthe average of five thickness readings taking the micrometerreadings at approximately 90 intervals about the circum
34、fer-ence of the specimen and spaced lineally approximately 0.25in. (6 mm). Methods A and B of Test Methods D374 can beused as alternative methods where agreed upon between themanufacturer and purchaser. Compute wall thickness as halfthe distance between the outside diameter of the mountedsleeving an
35、d the diameter of the gage rod.10. Report10.1 Report the following information:10.1.1 Identification of the sleeving,10.1.2 Method of measurement if other than Method C,10.1.3 Size of sleeving, and10.1.4 Wall thickness.11. Precision and Bias11.1 PrecisionThe overall estimates of the precisionwithin
36、laboratories (Sr)jand the precision between laboratories(SR)jfor the determination of wall thickness are given in Table2 for three selected materials. These estimates are based on around robin of the three materials with six laboratories partici-pating.611.2 BiasThis test method has no bias because
37、the valuefor wall thickness is determined solely in terms of this testmethod itself.DIELECTRIC BREAKDOWN VOLTAGE12. Significance and Use12.1 The dielectric breakdown voltage of the sleeving is ofimportance as a measure of its ability to withstand electricalstress without failure. This value does not
38、 correspond to thedielectric breakdown voltage expected in service, but is ofvalue in comparing different materials or different lots, incontrolling manufacturing processes or, when coupled withexperience, for a limited degree of design work. The compari-son of dielectric breakdown voltage of the sa
39、me sleevingbefore and after environmental conditioning (moisture, heat,and the like) gives a measure of its ability to resist these effects.For a more detailed discussion, refer to Test Method D149.13. Apparatus13.1 Inner ElectrodeAstraight suitable metallic conductorwhich fits snugly into the sleev
40、ing, without stretching the wall,in such a manner that one end of the wire is exposed and canbe used to support the specimen.13.1.1 For specimens having an inside diameter greater thanabout size 8, the use of stranded conductors or of a bundle ofwires of smaller size, is recommended, instead of usin
41、g a solidconductor.13.2 Outer ElectrodeStrips of soft metal foil 1-in. (25-mm) wide and not more than 0.001 in. (0.03 mm) in thickness.14. Procedure AStraight Specimens14.1 Test SpecimensTen specimens 7 in. (180 mm) longshall be prepared for each conditioning test (see Section 6)from material select
42、ed in accordance with Section 5.14.2 Procedure:14.2.1 After conditioning in accordance with 6.1, determinethe dielectric breakdown voltage in accordance with TestMethod D149 except as specified in 14.2.2 and 14.2.3.14.2.2 Mount a sleeving specimen on the inner electrode.Wrap the outer electrode tigh
43、tly on the outside of the sleevingat a distance of not less than 1 in. (25 mm) from the ends of thespecimens. Snugly wrap the foil over the sleeving. Wind twomore turns of foil over the first turn, leaving a free end of about0.5 in. (13 mm) to which an electrical contact can be made.14.2.3 Determine
44、 the breakdown voltage, in accordancewith Test Method D149 by the short time method, increasingthe voltage from zero at a rate of 0.5 kV/s. Calculate theaverage breakdown voltage for the ten tests.15. Procedure B90 Bent Specimens15.1 Test SpecimensTen specimens 4 in. (100 mm) longshall be prepared f
45、or each conditioning test (see Section 6)from material selected in accordance with Section 5.15.2 Procedure:15.2.1 Mount a sleeving specimen on the inner electrode.15.2.2 Bend the specimen through an angle of 90 6 2 overa smooth mandrel having a diameter of ten times the nominalinside diameter of th
46、e specimen. Arrange the bend so that it iscentrally located on the specimen.15.2.3 Condition the samples as specified in 6.1.15.2.4 Determine the dielectric breakdown voltage of thebent specimen using the following procedure:15.2.4.1 Carefully wrap a strip of metal foil as in 14.2.2snugly over the s
47、pecimens at the bend. In accordance with TestMethod D149 apply a voltage starting at zero and increasing ata constant rate of 0.5 kV/s until breakdown. Calculate theaverage breakdown voltage of the ten specimens.15.2.4.2 Apply the foil electrode after exposure to condi-tioning.6Supporting data have
48、been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR: RR:D09-1024.TABLE 2 Estimated Precision of Wall Thickness MeasurementSleeving TypeNominal Value,in. (mm)(Sr)j,in. (mm)(SR)j,in. (mm)Acrylic 0.0213 (0.54) 0.0007 (0.018) 0.0017 (0.043)PVC 0.0237 (0.60)
49、0.0007 (0.018) 0.0021 (0.053)Silicone Rubber 0.0331 (0.84) 0.0012 (0.030) 0.0019 (0.048)D350 13316. Report16.1 Report the following information:16.1.1 Identification of the sleeving,16.1.2 Conditioning before test,16.1.3 Voltage breakdown for each puncture,16.1.4 Average, minimum, and maximum voltagebreakdown,16.1.5 Procedure used (Method A or B), and16.1.6 Temperature and relative humidity of test, if differentfrom 6.1.17. Precision and Bias17.1 PrecisionThe overall estimates of the precisionwithin laboratories (Sr)jand the precision between lab
