1、Designation: D922 11An American National StandardStandard Specification forNonrigid Vinyl Chloride Polymer Tubing1This standard is issued under the fixed designation D922; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of
2、 last revision. 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 Department of Defense.1. Scope*1.1 This specification covers nonrigid
3、tubing of vinyl chlo-ride polymer or its copolymers with other materials for use inelectrical insulation in three grades, as follows:1.1.1 Grade AGeneral-purpose.1.1.2 Grade BLow-temperature.1.1.3 Grade CHigh-temperature.1.2 This standard and IEC-60684-3-100 to -105 address thesame subject matter bu
4、t differ in technical content.1.3 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 This standard does not purport to address all of th
5、esafety concerns, if any, associated with its use. It 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.2. Referenced Documents2.1 ASTM Standards:2D876 Test Methods for Nonri
6、gid Vinyl Chloride PolymerTubing Used for Electrical InsulationD1711 Terminology Relating to Electrical InsulationD3636 Practice for Sampling and Judging Quality of SolidElectrical Insulating MaterialsE176 Terminology of Fire Standards2.2 IEC Standards:IEC-60684-3-100 to -105 Flexible insulating sle
7、eving, Part3, Sheets 100 to 105: Extruded PVC sleeving33. Terminology3.1 Definitions:3.1.1 For definitions pertaining to electrical insulation, referto Terminology D1711.3.1.2 For definitions pertaining to fire standards, refer toTerminology E176.4. Ordering Information4.1 Orders for material covere
8、d by this specification shallinclude the following:4.1.1 Grade of tubing,4.1.2 Size and color,4.1.3 Total length in feet or metres,4.1.4 Length of cut pieces in inches or centimetres, if any,and4.1.5 Amount of tubing on each spool or in each coil, if notstandard packaging with the supplier.5. Color5
9、.1 Clear transparent, black, white, yellow, green, blue, andred shall be considered standard colors. Other colors shall beconsidered special. The color desired shall be specified in thepurchase order.6. Dimensional Requirements6.1 Inside DiameterThe inside diameter of the tubingshall conform to the
10、requirements prescribed in Table 1 orTable 2.6.2 Wall ThicknessThe wall thickness of the tubing shallconform to the requirements prescribed in Table 1 or Table 2.6.3 Commercial LengthsThe tubing shall be supplied incontinuous lengths.1This specification is under the jurisdiction of ASTM Committee D0
11、9 onElectrical and Electronic Insulating Materials and is the direct responsibility ofSubcommittee D09.07 on Flexible and Rigid Insulating Materials.Current edition approved Aug. 1, 2011. Published August 2011. Originallyapproved in 1947. Last previous edition approved in 2006 as D922 00a(2006).DOI:
12、 10.1520/D0922-11.2For referenced ASTM standards, 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.3Available from American National Standards
13、 Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036.1*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.7. Workmanship, Finish, and Appearance7.1 The surface s
14、hall be smooth, free of blisters, cracks, orany other defects that have the potential to detrimentally affectits suitability for the service intended. It shall not be subject topeeling, scaling, or flaking.8. Physical and Electrical Requirements8.1 Tubing shall conform to the following requirements
15、forphysical and electrical properties, using the tests contained inTest Methods D876:8.1.1 FlammabilityThe average duration of burning shallnot exceed 15 s and the paper indicator shall show no evidenceof being affected.8.1.2 Tensile StrengthThe average tensile strength shallbe not less than 2000 ps
16、i 15 MPa for GradesAand C, and notless than 1800 psi 13 MPa for Grade B. The average ultimateelongation shall be not less than 200 % for GradesAand C andnot less than 250 % for Grade B.8.1.3 Effect of Elevated Temperatures When Method A isused, the average loss of ultimate elongation after exposure
17、toelevated temperatures shall be not greater than 35 % for GradesA, B, and C. When Method B is used, the loss of weight afterexposure to elevated temperatures shall be not greater than15 % of the original weight for GradesAand B, and not greaterthan 10 % for Grade C.8.1.4 After immersion in oil, the
18、 average ultimate elonga-tion shall be within the following limits based on the averagetest value for the un-immersed tubing:GradesAandB +5%to20%Grade C 6 20 %8.1.5 Brittleness TemperatureThe brittleness temperatureshall be not above 30 C 22 F for Grade A, 55 C 67F for Grade B, and 10 C +14 F for Gr
19、ade C.8.1.6 Resistance to Penetration at Elevated TemperatureThe average temperature of failure shall be not less than thosein Table 3.8.1.7 Volume ResistivityThe volume resistivity shall benot less than 1012Vcm for Grades A and C and not less than1011Vcm for Grade B.8.1.8 Dielectric BreakdownThe av
20、erage dielectric break-down shall be not less than that prescribed for the correspond-ing wall thickness in Table 4.8.1.9 Dielectric Breakdown at High HumidityThe aver-age dielectric breakdown strength at 96 % relative humidityshall be not less than 90 % for GradeA, 75 % for Grade B, and85 % for Gra
21、de C of the dry value obtained on test.8.1.10 Strain ReliefThe change in length (shrinkage) shallnot exceed 18 % for sizes AWG No. 24 to No. 20, inclusive;14 % for sizes AWG No. 18 to 10, inclusive; and 9 % for sizesAWG No. 9 to 2 in. 50 mm, inclusive.8.1.11 Corrosive EffectThe resistance of the cop
22、per wireshall increase by not more than 2 %.9. Sampling9.1 For dimensional and visual tests, lots shall be sampled inaccordance with Inspection Level II of Practice D3636.9.2 To determine conformity with the requirements forphysical and electrical properties, lots shall be sampled inaccordance with
23、Inspection Level II. A quantity large enoughto complete all of the required tests shall be selected at randomfrom one fifth of the units sampled.10. Test Methods10.1 Determine the properties enumerated in this specifica-tion in accordance with Test Methods D876.11. Inspection11.1 The tubing shall be
24、 inspected and tested within 3 weeksof the date of receipt by the purchaser, unless otherwise agreedupon by the purchaser and the seller.12. Rejection12.1 If the number of defects found in the dimensional andvisual examination exceed the rejection number for AQL(acceptable quality level) = 2.5, or s
25、uch levels as otherwiseagreed upon the lot shall be subject to rejection at the option ofthe purchaser.12.2 If the results of any test do not conform to therequirements prescribed in this specification, that test shall berepeated on two additional specimens from the same lot. Ifthese two additional
26、specimens fail to meet the prescribedTABLE 1 Dimensional Tolerances of TubingA,BSpecified SizeInside Diameter, in. Wall Thicknessmax minWall Thick-ness, in.Tolerances,plus orminus, in.No. 24 0.022 in. 0.027 0.020 0.012 0.002No. 22 0.027 in. 0.032 0.025 0.012 0.002No. 20 0.034 in. 0.039 0.032 0.016 0
27、.003No. 18 0.042 in. 0.049 0.040 0.016 0.003No. 16 0.053 in. 0.061 0.051 0.016 0.003No. 14 0.066 in. 0.074 0.064 0.016 0.003No. 12 0.085 in. 0.091 0.081 0.016 0.003No. 11 0.095 in. 0.101 0.091 0.016 0.003No. 10 0.106 in. 0.112 0.102 0.016 0.003No. 9 0.118 in. 0.124 0.114 0.020 0.003No. 8 0.133 in. 0
28、.141 0.129 0.020 0.003No. 7 0.148 in. 0.158 0.144 0.020 0.003No. 6 0.166 in. 0.178 0.162 0.020 0.003No. 5 0.186 in. 0.198 0.182 0.020 0.003No. 4 0.208 in. 0.224 0.204 0.020 0.003No. 3 0.234 in. 0.249 0.229 0.020 0.003No. 2 0.263 in. 0.278 0.258 0.020 0.003No. 1 0.294 in. 0.311 0.289 0.020 0.003No. 0
29、 0.330 in. 0.347 0.325 0.020 0.003516 in. 0.334 0.312 0.025 0.00338 in. 0.399 0.375 0.025 0.003716 in. 0.462 0.438 0.025 0.00312 in. 0.524 0.500 0.025 0.00358 in. 0.655 0.625 0.030 0.00334 in. 0.786 0.750 0.035 0.00578 in. 0.911 0.875 0.035 0.0051 in. 1.036 1.000 0.035 0.005114 in. 1.290 1.250 0.040
30、 0.005112 in. 1.550 1.500 0.045 0.006134 in. 1.812 1.750 0.055 0.0082 in. 2.070 2.000 0.060 0.010AMultiply inches by 25.4 to get millimetres.BFor tubing sizes not listed in this table, the wall thickness of the nearest largerdiameter shall apply.D922 112requirements, the purchaser shall have the opt
31、ion to reject thelot of tubing represented by that specimen.13. Packaging and Package Marking13.1 PackagingAll tubing shall be properly separated bysize when packaged for shipment. In accordance with the bestpractice, all tubing shall be packaged to withstand shipmentand shall be given ample protect
32、ion against damage.13.2 MarkingEach item of the order shall be marked withthe name of the manufacturer, the total length in feet, size, andcolor.14. Keywords14.1 electrical insulation; nonrigid vinyl chloride polymertubingTABLE 2 Metric Dimensional Tolerances of TubingAInside Diameter, mm Thin Wall
33、Standard Wall Thick WallSpecified Size max minWall Thickness,mmTolerances,6 mmWall Thickness,mmTolerances,6 mmWall Thickness,mmTolerances,6 mm0.3 0.4 0.2 0.3 0.1 0.4 0.1 0.5 0.10.5 0.6 0.4 0.3 0.1 0.4 0.1 0.5 0.10.8 0.9 0.7 0.3 0.1 0.4 0.1 0.5 0.11.0 1.15 0.85 0.3 0.1 0.4 0.1 0.5 0.11.5 1.65 1.35 0.
34、3 0.1 0.4 0.1 0.5 0.12.0 2.15 1.85 0.3 0.1 0.4 0.1 0.5 0.12.5 2.65 2.35 0.3 0.1 0.4 0.1 0.5 0.13 3.15 2.85 0.3 0.1 0.4 0.1 0.5 0.14 4.25 3.75 0.3 0.1 0.5 0.1 0.6 0.15 5.25 4.75 0.3 0.1 0.5 0.1 0.6 0.16 6.25 5.75 0.3 0.1 0.5 0.1 0.6 0.18 8.25 7.75 0.5 0.1 0.7 0.1 0.8 0.1510 10.5 9.5 0.5 0.1 0.7 0.1 0
35、.8 0.1512 12.5 11.5 0.5 0.1 0.7 0.1 0.8 0.1516 16.5 15.5 0.5 0.1 0.85 0.15 1.2 0.220 20.5 19.5 0.5 0.1 0.85 0.15 1.2 0.225 25.5 24.5 0.5 0.1 0.85 0.15 1.2 0.230 30.5 29.5 0.5 0.1 0.85 0.15 1.2 0.240 41 39 0.5 0.1 0.85 0.15 1.35 0.1550 51 49 0.5 0.1 0.85 0.15 1.55 0.25AFor tubing sizes not listed in
36、this table, the wall thickness of the nearest larger diameter shall apply.TABLE 3 Average Temperature of FailureGrade Nominal Wall Thickness, in. (mm)Temperature,C, minA all sizes 75B all sizes 80C H0.016 and 0.020 0.406 and 0.508!0.025, 0.030 and 0.035 0.635, 0.762, and 0.889!0.040, 0.045, 0.055 an
37、d 0.060 1.016, 1.143, 1.397, and 1.524!707585TABLE 4 Dielectric Breakdown RequirementsABWall Thickness, in.(mm)Dielectric Breakdown forGrades A and C, kV, minDielectric Breakdown forGrade B, kV, min0.012 (0.305) 10.8 9.30.016 (0.406) 12.5 10.40.020 (0.508) 14.0 11.00.025 (0.635) 15.7 12.00.030 (0.76
38、2) 17.1 12.90.035 (0.889) 18.0 13.50.040 (1.016) 19.2 14.00.045 (1.143) 20.4 14.50.050 (1.270) 21.5 15.00.055 (1.397) 22.8 15.50.060 (1.524) 24.0 16.0AFor a wall thickness not listed in this table, the dielectric breakdown value shallbe that prescribed for the nearest smaller thickness.BFor tubing s
39、izes not listed in this table, the wall thickness of the nearest largerdiameter shall apply.D922 113SUMMARY OF CHANGESCommittee D09 has identified the location of selected changes to this specification since the last issue,D6096 00AR06, that may impact the use of this specification. (Approved August
40、 1, 2011.)(1) Revised Units statement.(2) Added 1.3.(3) Revised text throughout.(4) Revised measurements in Table 3 and Table 4.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
41、 expressly advised that determination of the validity of any such patent rights, and 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 r
42、evised, either reapproved or withdrawn. Your comments are invited either for revision 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
43、 may attend. If you feel that your comments have not received a fair hearing you shouldmake 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
44、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/).D922 114
