1、Designation: F 1742 03e1Standard Specification forPVC Insulating Sheeting1This standard is issued under the fixed designation F 1742; 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 parenthese
2、s indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.e1NOTEA precision and bias statement and Figure 1 were added editorially in August 2004.1. Scope1.1 This specification covers acceptance testing of PolyVinyl Chloride
3、 insulating sheeting for use as a covering forprotection of workers.1.2 The following safety hazards caveat applies only to thetest method portion, 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 re
4、sponsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use. See 18.1 for a specific warning statement.2. Referenced Documents2.1 ASTM Standards:2D 149 Test Method for Dielectric Breakdown Voltag
5、e andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power FrequenciesD 412 Test Methods for Vulcanized Rubber and Thermo-plastic Rubbers and Thermoplastic ElastomersTensionD 570 Test Method for Water Absorption of PlasticsD 747 Test Method for Apparent Bending Modulus ofPl
6、astics by Means of a Cantilever BeamD 1004 Test Method for Initial Tear Resistance of PlasticFilm and SheetingD 1048 Specification for Rubber Insulating BlanketsD 1746 Test Method for Transparency of Plastic SheetingD 2240 Test Method for Rubber PropertyDurometerHardness2.2 American National Standar
7、d:3ANSI C84.1 Voltage Ratings for Electric Power Systemsand Equipment (60 Hz)3. Terminology3.1 Definitions:3.1.1 voltage, maximum usethe ac voltage (rms) classifi-cation of the protective equipment that designates the maxi-mum nominal design voltage of the energized system that maybe safely worked.
8、The nominal design voltage is equal tophase-to-phase voltage on multiphase circuits.3.1.1.1 DiscussionIf there is no multiphase exposure in asystem area, and the voltage exposure is limited to phase(polarity on dc systems) to ground potential, the phase (polarityon dc systems) to ground potential sh
9、all be considered to be thenominal design voltage.3.1.2 DiscusssionIf electrical equipment and devices areinsulated, or isolated, or both, such that the multiphase expo-sure on a grounded wye circuit is removed, then the nominaldesign voltage may be considered as the phase-to-groundvoltage on that c
10、ircuit.3.1.3 voltage, nominal designa nominal value consistentwith the latest revision of ANSI C84.1, assigned to the circuitor system for the purpose of conveniently designating itsvoltage class.4. Significance and Use4.1 This specification covers the minimum electrical andphysical properties guara
11、nteed by the manufacturer and thedetailed procedures by which such properties are to be deter-mined. The purchaser may at his option perform or haveperformed any of these tests in order to verify the guarantee.Claims for failure to meet the specification are subject toverification by the manufacture
12、r.NOTE 1This material is intended for a single use application.4.2 The safe and proper field use of PVC sheeting is beyondthe scope of this specification.4.2.1 When authorizing use of PVC sheeting for personalprotection, a margin of safety should be allowed between themaximum voltage at which it is
13、used and the proof-test voltage1This specification is under the jurisdiction of ASTM Committee F18 onElectrical Protective Equipment for Workers and is the direct responsibility ofSubcommittee F18.25 on Insulating Cover-Up Equipment.Current edition approved Sept. 10, 2003. Published November 2003. O
14、riginallyapproved in 1996. Last previous edition approved in 1996 as F 174296 (2000)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 p
15、age onthe ASTM website.3Available from American National Standards Institute, 11 West 42nd St., 13thFloor, New York, NY 10036.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.at which it is tested. The relationship between proof-test
16、andthe maximum voltage at which sheeting shall be used is shownin Table 1.5. Classification5.1 PVC insulating sheeting covered under this specificationshall be designated as Class 0 or Class 1.5.1.1 The class designation shall be based on the electricalproperties as shown in Table 2 or Table 3.6. Or
17、dering Information6.1 Orders for PVC insulating sheeting under this specifi-cation should include the following information:6.1.1 Class,6.1.2 Thickness,6.1.3 Width, and6.1.4 Length.7. Manufacture and Marking7.1 The insulating sheet shall consist of a clear PVCcompound with a smooth, polished finish
18、on each surface (seeFig. 1).7.2 Each piece of sheeting shall be marked clearly andpermanently at a maximum interval of1m(3ft)with the nameof the manufacture or supplier, ASTM D and class.8. Physical Requirements8.1 Insulating sheeting shall conform to the physical re-quirements in Table 4.8.2 PVC in
19、sulating sheeting should remain flexible for usethrough normal temperature ranges.8.3 PVC insulating sheeting is clear but may be tinted to aidin visual identification.9. Electrical Requirements9.1 The entire length of each roll of sheeting when new(unused) shall withstand the 60-Hz ac proof-test vo
20、ltage (rmsvalue) specified in Table 2 or the dc proof-test voltage (avgvalue) specified in Table 3. The test voltage shall be appliedcontinuously for 1 min.9.2 The sheeting material when tested between 51-mm(2-in.) disk electrodes with edges rounded to a radius of 6 mm(0.25 in.), shall show a 60-Hz
21、dielectric strength of not lessthan the requirements shown in Table 2 or Table 3 for thethickness of each individual specimen.10. Dimensions and Permissible Variations10.1 WidthStandard widths shall be 1220 6 25 mm (48 61 in.). Other widths may be negotiated with the manufacturer.10.2 ThicknessThe t
22、hickness of the sheeting shall be asspecified in Table 5.TABLE 1 Proof Test/Use Voltage RelationshipNOTE 1The ac voltage (rms) classification of the protective equip-ment designates the maximum nominal design voltage of the energizedsystem that may be safely worked. The nominal design voltage is equ
23、al to:(a) The phase to phase on multiphase circuits, or(b) The phase to ground voltage on single phase grounded circuits.Class of InsulatingSheetingMaximum UseVoltageAPhase-Phase ac rms, maxAC Proof-TestVoltage, rms VDC Proof-TestVoltage, avg V0 1000 5000 85001 7500 10 000 17 000AExcept for class 0
24、equipment, the maximum AC use voltage is based on thefollowing formula: Maximum use voltage (maximum nominal design volt-age) = 0.95 ac proof-test voltage-2000.TABLE 2 AC Voltage RequirementsClassElectrode ClearancesMinAProof TestVoltagerms VDielectricBreakdown TestVoltagerms Vmm in.0 76 3 5000 10 0
25、001 76 3 10 000 20 000AThese nominal clearances are intended to avoid flashover and may beincreased from the standard of 100 kPa (1 atm) barometric pressure and averagehumidity by no more than 51 mm (2 in.) when required by change in atmosphericconditions. These clearances may be decreased if atmosp
26、heric conditions permit.TABLE 3 DC Voltage RequirementsClassElectrode ClearancesMinAProof TestVoltageavg VDielectricBreakdownTest Voltageavg Vmm in.0 76 3 8500 17 0001 76 3 17 000 44 000AThese nominal clearances are intended to avoid flashover and may beincreased from the standard of 100 kPa (1 atm)
27、 barometric pressure and averagehumidity by no more than 51 mm (2 in.) when required by change in atmosphericconditions. These clearances may be decreased if atmospheric conditions permit.FIG. 1 PVC Insulating SheetingTABLE 4 Physical RequirementsTensile strength, min, MPa (psi) 2600Elongation, min,
28、 % 300Moisture absorption, max increase,A% 0.30Hardness, max shore A 90Specular transmission,Bmin, % 75Tear resistance, min, lbf/in. 575Stiffness, max, psi 25 00020F7CPuncture resistance, min, lbf/in. 900ADistilled water 23C (75F).B550 nm.TABLE 5 Thickness MeasurementsClassThickness Tolerancemm in.
29、mm in.0 1.02 0.040 0.12 60.0051 1.02 0.040 0.12 60.005F 1742 03e1211. Workmanship and Finish11.1 The sheeting shall be smooth and uniform and free ofharmful physical irregularities, which can be detected by athorough test or inspection.11.1.1 Nonharmful IrregularitiesFlow marks may bepresent on all
30、PVC sheeting due to inherent difficulties in themanufacturing process. These irregularities may appear aswaves in the sheeting which are acceptable provided that thesheeting thickness at any irregularity conforms to the thicknessrequirements of Table 5.12. Guarantee12.1 The manufacturer or supplier
31、shall replace, withoutcharge to the purchaser, unused sheeting which at any timewithin a period of nine months from date of initial delivery ofshipment to the purchaser or his designee, fail to pass the testsin this specification. This guarantee will be binding on themanufacturer or supplier only if
32、 the sheeting has been properlystored and has not been subjected to more than an originalacceptance test and one retest.12.2 Any acceptance test made by the purchaser or thepurchasers designee, shall be performed within the first twomonths of the guarantee period unless otherwise specified.NOTE 2Pro
33、per storage means that the sheeting is stored withoutdistortion and not stored directly above or in proximity to steam pipes,radiators, or other sources of artificial heat, or exposed to direct sunlight.It is desirable that the ambient storage temperature shall not exceed 35C(95F).13. Sampling13.1 E
34、ach roll of sheeting in a lot or shipment shall besubject to inspection and test by the manufacturer includingelectrical proof test to levels required in Table 2 or Table 3 ofthis specification.13.2 An original sample of sufficient material shall be cutfrom the end of a roll or rolls selected from t
35、he lot for the testrequirements of Sections 9and 8. A lot is defined as thatquantity of material produced by a common manufacturingprocess during a consecutive time period not to exceed 24 h. Iffailure occurs in the first sample, a second sample of the samequantity shall be selected and tested.14. R
36、ejection14.1 Individual rolls shall be rejected if they fail to meet themanufacturing and marking requirements of Section 7, theelectrical requirements of 7, the width requirements of 10.1,the minimum thickness requirements of 10.2, or the workman-ship requirements of Section 11.14.2 The entire lot
37、or shipment of sheeting shall be rejectedunder any of the following conditions:14.2.1 If 5 % or more, but not less than two rolls of thesheeting in a shipment fail to meet the requirements of 9.1.14.2.2 If two dielectric breakdowns that do not meet thedielectric strength value specified in 9.2 occur
38、 in five tests onthe specimen.14.2.3 If one dielectric breakdown of five tests on theoriginal and one or more dielectric breakdowns of five tests onan additional specimen fail to meet the dielectric strength valuespecified in 9.2.14.3 The testing shall be terminated and the manufacturer orsupplier n
39、otified if, during the course of testing, 5 % or more,but not less than two rolls, of the sheeting in a lot or shipment,fail to meet the requirements of 9.1 or 9.2 as determined by therejection criteria of 14.1, 14.2, 14.2.1, 14.2.2 or 14.2.3. Themanufacturer or supplier may in such a case require t
40、hepurchaser to submit proof that the test procedure and equip-ment conform to the appropriate paragraphs of Section 18.When such proof has been furnished, the manufacturer orsupplier may request that his representative witness the testingof additional rolls from the shipment.14.4 The entire lot or s
41、hipment of sheeting may be rejectedat the option of the purchaser if two of the five specimenstested fail any of the separate requirements outlined in Section8.14.5 The entire lot or shipment of sheeting may be rejectedat the option of the purchaser if 25 % of the sheeting in the lotor shipment fail
42、 to meet the requirements of Section 10 or 11.14.6 All rejected material shall be returned unaltered exceptas required for sampling, as directed by the manufacturer at hisor the suppliers request. Those sheets punctured when testedin accordance with 9.1 or 9.2, however, shall be stamped,punched, or
43、cut prior to being returned to the supplier toindicate that they are unfit for electrical use.15. Packaging15.1 Sheeting shall be packaged in rolls and shall not bedistorted mechanically (see Fig. 1).16. Thickness Measurements16.1 Thickness measurements should be made on completesheeting samples wit
44、h a caliper graduated to within 0.03 mm(0.001 in.). At least five thickness measurements shall be madeat selected points uniformly distributed over the test area of thesheeting.TEST METHODS17. Sequence of Testing17.1 The following order of procedure is suggested fortesting PVC insulating sheeting.17
45、.1.1 Inspection of the surfaces in accordance with Section11.17.1.2 The dimensions in accordance with Sections 10 and16.17.1.3 Electrical proof test in accordance with the appropri-ate paragraphs of Section 18.17.1.4 Breakdown voltage test in accordance with the ap-propriate paragraphs of Section 18
46、.17.1.5 Physical property tests in accordance with 19.18. Electrical Tests18.1 Conditioning Prior to testing, the sheeting shall beplaced in a flat position. (WarningIt is recommended thatthe test apparatus be designed to afford the operator fullprotection in the performance of his duties. Reliable
47、means ofdeenergizing and grounding the high-voltage circuit should beprovided.)18.2 AC Proof Test:F 1742 03e1318.2.1 ElectrodesWhere electrodes are to be employed aspart of the test apparatus, they shall be of such design so as toapply the electrical stress uniformly over the test area withoutproduc
48、ing mechanical strain in the material. The electrodesused in proof tests shall be of such dimensions that theflashover clearances specified in Table 2 are not exceeded. Asatisfactory procedure for ac proof testing utilizes electrodesthat will provide intimate contact without undue pressure.NOTE 3Rec
49、tangular metal sheets approximately 3-mm (0.06-in.)thick, having smoothly rounded edges and corners, have been found to besatisfactory for this purpose. Also satisfactory are wet felt or sponge-topelectrodes. Test platens made from grade 316L stainless steel 100 meshscreen material is also acceptable.18.2.2 Voltage Supply and Regulation:18.2.2.1 The test equipment used in both the proof-testvoltage and dielectric breakdown voltage tests shall be capableof supplying an essentially stepless and continuously variablevoltage to the test specimen. Motor-driven
