ASTM F2320-2018 Standard Specification for Rubber Insulating Sheeting.pdf

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1、Designation: F2320 11F2320 18Standard Specification forRubber Insulating Sheeting1This standard is issued under the fixed designation F2320; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in par

2、entheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers testing of rubber insulating sheeting for use as a covering for the protection of workers fromaccidental contact with live

3、 electrical conductors, apparatus, or circuits.1.2 Two types of sheeting, differing in chemical and physical characteristics, are provided and are designated as Type I,non-resistant to ozone and Type II, resistant to ozone.1.3 SixThree classes of sheeting, differing in electrical protection characte

4、ristics are provided and designated as Class 00, Class0, Class 1, Class 2, Class 3, Class 4.and Class 1.1.4 Two styles of sheeting, differing in construction characteristics, are provided and are designated as Style A and Style B.1.5 The follow safety hazards caveat applies only to the test method p

5、ortion, Sections 17 19, of this specification. Thisstandard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine th

6、e applicabilityof regulatory requirementslimitations prior to use.NOTE 1Rubber Insulating Sheeting should remain flexible for use through normal temperature ranges.NOTE 2Rubber as used in this specification is a generic term that includes elastomers and elastomeric compounds, regardless of origin.1.

7、6 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trad

8、e (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials atCommercial Power FrequenciesD412 Test Methods for Vulcanized Rubber and Thermoplastic ElastomersTensionD471 Test Method fo

9、r Rubber PropertyEffect of LiquidsD518 Test Method for Rubber DeteriorationSurface Cracking (Withdrawn 2007)3D570 Test Method for Water Absorption of PlasticsD751 Test Methods for Coated FabricsD1048 Specification for Rubber Insulating BlanketsD1149 Test Methods for Rubber DeteriorationCracking in a

10、n Ozone Controlled EnvironmentD1388 Test Method for Stiffness of FabricsD2136 Test Method for Coated FabricsLow-Temperature Bend TestD2240 Test Method for Rubber PropertyDurometer Hardness1 This specification is under the jurisdiction of ASTM Committee F18 on Electrical Protective Equipment for Work

11、ers and is the direct responsibility of SubcommitteeF18.25 on Insulating Cover-Up Equipment.Current edition approved May 1, 2011Nov. 1, 2018. Published June 2011November 2018. Originally approved in 2003. Last previous edition approved in 20032011 asF232003.11. DOI: 10.1520/F2320-11.10.1520/F2320-18

12、.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. ForAnnual Book ofASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 The last approved version of this historical standard is ref

13、erenced on www.astm.org.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that

14、 users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States12.2 Other Standards:MVSS

15、 302 Motor Vehicle Safety Standard 302 Flammability of Interior Materials4UL 214 Standard for Tests for Flame-Propagation of Fabrics and Films5ANSI C84.1 Voltage Ratings for Electric Power Systems and Equipment (60 Hz)63. Terminology3.1 Definitions:3.1.1 userthe entity employing the actual worker(s)

16、 utilizing the equipment; if no separate employer, then the individual.3.1.2 voltage, maximum usethe ac voltage (rms) classification of the protective equipment that designates the maximumnominal design voltage of the energized system that may be safely worked. The nominal design voltage is equal to

17、 phase-to-phasevoltage on multiphase circuits.3.1.2.1 DiscussionIf there is no multiphase exposure in a system area, and the voltage exposure is limited to phase (polarity on dc systems) to groundpotential, the phase (polarity on dc systems) to ground potential shall be considered to be the nominal

18、design voltage.3.1.2.2 DiscussionIf the electrical equipment and devices are insulated or isolated or both, such that the multiphase exposure on a grounded wyecircuit is removed, then the nominal design voltage may be considered as the phase-to-ground voltage on that circuit.3.1.3 voltage, nominal d

19、esigna nominal value consistent with the latest revision of ANSI C84.1, assigned to the circuit orsystem for the purpose of conveniently designating its voltage class.4. Significance and Use4.1 This specification covers the minimum electrical, chemical and physical properties guaranteed by the manuf

20、acturer and thedetailed procedures by which such properties are to be determined. The purchaser may as his/her option, perform or haveperformed any of these tests in order to verify the guarantee. Claims for failure to meet the specification are subject to verificationby the manufacturer.4.2 Rubber

21、Insulating Sheeting is used for personal protection; therefore, when authorizing its use a margin of safety shall beallowed between the maximum voltage at which it is used and the proof-test voltage at which it is tested. The relationship betweenproof-test and the maximum voltage at which Sheeting s

22、hall be used is shown in Table 1.4.3 Work practices vary from user to user, depending upon many factors. These factors may include, but are not limited tooperating system voltages, design, work procedures and techniques, weather conditions, etc. Therefore, except for the restrictionsset forth in thi

23、s specification because of design limitations, the use and maintenance of the equipment is beyond the scope of thisspecification.4 Available from the U.S. Department of Transportation, 400 7th Street SW, Room 6111, Mail Code: NSA-30, Washington, DC 20590.5 Available from Underwriters Laboratories (U

24、L), Corporate Progress, 333 Pfingsten Rd., Northbrook, IL 60062.6 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036.TABLE 1 Proof Test/Use RelationshipClass ofInsulatingSheetingMaximumACUse Voltagems,VAPhase-Phaseac rms, maxAC Proof-TestVoltag

25、e, rmsVMaximum DCUse Voltage,avg, VDC Proof-TestVoltage, avg V00 500 2500 750 10 0000 1000 5000 1500 20 0001 7500 10 000 11 250 40 0001 7500 10 000 11 250 30 0002 17 000 20 000 25 500 50 0003 26 500 30 000 39 750 60 0004 36 000 40 000 54 000 70 000A Except for Class 00 and 0 equipment, the maximum u

26、se voltage is based on thefollowing formula: maximum use voltage (maximum nominal design voltage) =0.95 ac proof-test voltage2000.F2320 1824.3.1 It is common practice and the responsibility of the user of this type of protective equipment to prepare completeinstructions and regulations to govern the

27、 correct and safe use of such equipment.5. Classification5.1 Sheeting covered under this specification shall be designated as Type I or Type II: Class 00, Class 0, Class I, Class 2, Class3, or Class 4; Style A or Style B.5.1.1 Type I, non-resistant to ozone, made from any elastomer or combination of

28、 elastomeric compounds of natural or syntheticorigin.5.1.2 Type II, ozone resistant, made from any elastomer or combination of elastomeric compounds of natural or synthetic origin,which may include one or more of the following special properties:AFlame ResistanceBOil Resistance5.1.3 The class design

29、ation is based on the electrical properties as shown in Tables 1-3.5.1.4 Style A, constructed of the elastomers indicated under Type I or Type II, shall be free of any reinforcements.5.1.5 Style B, constructed of the elastomers indicated under Type I or Type II, shall incorporate a reinforcement orr

30、einforcements; this shall not adversely affect the dielectric characteristics of the sheeting.6. Ordering Information6.1 Orders for Rubber Insulating Sheeting under this specification should include the following information:6.1.1 Type,6.1.2 Class,6.1.3 Width,6.1.4 Length, and6.1.5 Style.6.2 The lis

31、ting of types, classes, widths, length and styles is not intended to mean that all shall necessarily be available frommanufacturer; it signifies only that, if made, they shall conform to the detail of this specification.7. Manufacture and Marking7.1 The sheeting shall consist of a rubber compound wi

32、th a surface free of harmful physical irregularities, as defined in 11.1,and may have one or more fabric inserts. Any such fabric insert shall not affect adversely the dielectric characteristics of thesheeting.7.2 The sheeting shall be marked clearly and permanently at a maximum interval of 0.33 m (

33、1ft) with the name of themanufacturer or supplier, ASTM (this specification#), Type, and Class.8. Chemical and Physical Requirements8.1 Insulating Sheeting shall conform to the applicable chemical and physical requirements in Table 4.9. Electrical Requirements9.1 The entire length when new (unused)

34、shall withstand the 50-Hz or 60-Hz ac proof-test voltage (rms value), Table 2 or thedc proof-test (average value) specified in Table 3. The test voltage shall be applied continuously for at least 3 min.9.2 The sheeting material, when tested between 50-mm (2 in.) disk electrodes with edges rounded to

35、 a radius of 6 mm (0.25in.), shall show a 50-Hz or 60-Hz dielectric strength of not less than the value shown in Table 2, when tested in accordance with18.4.TABLE 2 AC Electrical Test RequirementsClassACElectrodemmClearancesminAin.Proof TestVoltagerms VDielectricBreakdownTest Voltagerms V00 76 3 250

36、0 40000 76 3 5000 60001 76 3 10 000 20 0002 127 5 20 000 30 0003 178 7 30 000 40 0004 254 10 40 000 50 000A These nominal clearances are intended to avoid flashover and may be increasedfrom the standard of 100 kPa (1 atm) barometric pressure and average humidity byno more than 51 m (2 in.) when requ

37、ired by change in atmospheric conditions.These clearances may be decreased if atmospheric conditions permit.F2320 18310. Dimensions and Permissible Variations10.1 WidthStandard width shall be 914 6 25 mm (36 6 1 in.)10.2 ThicknessThe thickness of the sheeting shall be as specified in Table 5.11. Wor

38、kmanship and Finish11.1 The sheeting shall be free of harmful physical irregularities, which can be detected by a thorough test or inspection.11.1.1 Harmful physical irregularities may be defined as any feature that disrupts the uniform surface and represents a potentialhazard to the user, such as p

39、inholes, cracks, blisters, cuts, conductive imbedded foreign matter creases, pinch marks, voids(entrapped air), and prominent ripples.11.2 Nonharmful IrregularitiesSurface irregularities or imperfections may be present on all rubber sheeting due to inherentdifficulties in the manufacturing process.

40、These irregularities or imperfections may appear as indentations, protuberances, orimbedded foreign material that are acceptable provided that:11.2.1 The indentation or protuberance tends to blend into a smooth slope upon stretching of the material. The rubber thicknessat any irregularity conforms t

41、o the thickness requirements.11.2.2 The rubber thickness at any irregularity conforms to the thickness requirements.11.2.3 Foreign material remains in place when the sheeting is bent and stretches equally with the material surrounding it.12. Guarantee12.1 The manufacturer or supplier shall replace w

42、ithout charge to the purchaser, unused sheeting which, at any time within aperiod of (12) months from date of initial delivery of shipment to the purchaser or his/her designee, fails to pass the tests in thisspecification. The guarantee will be binding on the manufacturer or supplier only if the she

43、eting has been properly stored and hasnot been subjected to more than an original acceptance test and one retest.12.2 Any acceptance test made by the purchaser, or the purchasers designee, shall be performed within the first two (2) monthsof the guarantee period unless otherwise specified.NOTE 3Prop

44、er storage means that the sheeting is stored without distortion, and not stored directly above or in proximity to steam pipes, radiators,or other sources of artificial heat, or exposed to direct sunlight or sources of ozone. It is desirable that the ambient storage temperature not exceed 36C(95F).13

45、. Sampling13.1 Each roll of sheeting in a lot or shipment shall be subject to inspection and test to meet the requirement of Sections 7, 9.1,11 and 15.13.2 An original sample of one roll or 1 % of the lot or shipment, whichever is greater, shall be selected at random from thelot or shipment for the

46、test requirements of 9.2 and Sections 8 and 15. If a failure occurs in the first sample, a second sample ofthe same quantity shall be selected and tested. A sufficient amount of material shall be cut from the end of a roll or rolls selectedfrom the lot for the test.TABLE 3 DC Electrical Test Require

47、mentsClassDCElectrodemmClearancesminAin.Proof TestVoltageBrms VDielectricBreakdownTest Voltagerms V00 76 3 10 000 13 0000 76 3 20 000 35 0001 76 3 40 000 60 0002 152 6 50 000 70 0003 203 8 60 000 80 0004 305 12 70 000 90 000TABLE 3 DC Electrical Test RequirementsClassDCElectrodemmClearancesminAin.Pr

48、oof TestVoltageBrms VDielectricBreakdownTest Voltagerms V00 76 4 10 000 13 0000 76 4 20 000 35 0001 76 4 30 000 50 000A These nominal clearances are intended to avoid flashover and may be increasedfrom the standard of 100 kPa (1 atm) barometric pressure and average humidity byno more than 51 mm (2 i

49、n.) when required by change in atmospheric conditions.These clearances may be decreased if atmospheric conditions permit.B DC Proof Test voltages were determined using negative polarity.F2320 18414. Rejection14.1 Individual rolls shall be rejected if they fail to meet the manufacturing and marking requirements of Section 7, the electricalrequirements of Section 9, the width requirements of 10.1, the thickness requirements of 10.2, or the workmanship requirementsof Section 11.14.2 The entire lot or shipment of sheeting shall be rejected under any of the