ASTM D922-2000a(2006) Standard Specification for Nonrigid Vinyl Chloride Polymer Tubing《非硬质聚氯乙烯管系的标准规范》.pdf
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1、Designation: D 922 00a (Reapproved 2006)An American National StandardStandard Specification forNonrigid Vinyl Chloride Polymer Tubing1This standard is issued under the fixed designation D 922; the number immediately following the designation indicates the year oforiginal adoption or, in the case of
2、revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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. Scope1.1 This specifica
3、tion covers nonrigid 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.NOTE 1This standard is similar but not identical to IEC-60
4、684-3-100to -105.2. Referenced Documents2.1 ASTM Standards:2D 876 Test Methods for Nonrigid Vinyl Chloride PolymerTubing Used for Electrical InsulationD 1711 Terminology Relating to Electrical InsulationD 3636 Practice for Sampling and Judging Quality of SolidElectrical Insulating MaterialsE 176 Ter
5、minology of Fire Standards2.2 IEC Standards:IEC-60684-3-100 to -105 Flexible insulating sleeving, Part3, Sheets 100 to 105: Extruded PVC sleeving33. Terminology3.1 Definitions:3.1.1 For definitions pertaining to electrical insulation, referto Terminology D 1711.3.1.2 For definitions pertaining to fi
6、re standards, refer toTerminology E 176.4. Ordering Information4.1 Orders for material covered 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
7、of tubing on each spool or in each coil, if notstandard packaging with the supplier.5. Color5.1 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. Dime
8、nsional Requirements6.1 Inside DiameterThe inside diameter of the tubingshall conform to the 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 sup
9、plied incontinuous lengths.7. Workmanship, Finish, and Appearance7.1 The surface shall be smooth, free of blisters, cracks, orany other defects that may detrimentally affect its suitability forthe service intended. It shall not be subject to peeling, scaling,or flaking.8. Physical and Electrical Req
10、uirements8.1 Tubing shall conform to the following requirements forphysical and electrical properties: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
11、less than 2000 psi 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 elongatio
12、n after exposure toelevated temperatures shall be not greater than 35 % for Grades1This specification is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and is the direct responsibility ofSubcommittee D 09.07 on Flexible and Rigid Insulating Materials.Cu
13、rrent edition approved April 1, 2006. Published April 2006. Originallyapproved in 1947. Last previous edition approved in 2000 as D 922 00a.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volum
14、e information, refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States
15、.A, 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 average ultimate elonga-tion shall be within the following limi
16、ts 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 Grade C.8.1.6 Resistance to Penetration at Elevated TemperatureThe
17、 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 average dielectric break-down shall be not less than that prescrib
18、ed 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 Grade C of the dry value obtained on test.8.1.10 Strain ReliefThe c
19、hange 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 copper wireshall increase by not more than 2 %.9. Sampling9.1 For d
20、imensional and visual tests, lots shall be sampled inaccordance with Inspection Level II of Practice D 3636.9.2 To determine conformity with the requirements forphysical and electrical properties, lots shall be sampled inaccordance with Inspection Level II. A quantity large enoughto complete all of
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