ASTM D120-2008 Standard Specification for Rubber Insulating Gloves.pdf

1、Designation: D 120 08Standard Specification forRubber Insulating Gloves1This standard is issued under the fixed designation D 120; 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 parentheses i

2、ndicates 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. Scope1.1 This specification covers manufacturing and testing ofrubber insulating glove

3、s for protection of workers from elec-trical shock.1.2 Two types of gloves are provided and are designated asType I, non-resistant to ozone, and Type II, resistant to ozone.1.3 Six classes of gloves, differing in electrical characteris-tics, are provided and are designated as Class 00, Class 0, Clas

4、s1, Class 2, Class 3, and Class 4.1.4 The values stated in SI units are to be regarded asstandard. See ASTM SI 10.1.5 The following safety hazards caveat pertains only to thetest method portion, Sections 16, 17, 18, and 19, of thisspecification: This standard does not purport to address all ofthe sa

5、fety 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. For specificprecaution statements, see 18.2.2. Referenced Documents2.1 A

6、STM Standards:2D 297 Test Methods for Rubber ProductsChemicalAnalysisD 412 Test Methods for Vulcanized Rubber and Thermo-plastic ElastomersTensionD 573 Test Method for RubberDeterioration in an AirOvenD 624 Test Method for Tear Strength of ConventionalVulcanized Rubber and Thermoplastic ElastomersD

7、1415 Test Method for Rubber PropertyInternationalHardnessD 2240 Test Method for Rubber PropertyDurometerHardnessD 2865 Practice for Calibration of Standards and Equip-ment for Electrical Insulating Materials TestingF 819 Terminology Relating to Electrical Protective Equip-ment for WorkersSI 10 Stand

8、ard for Use of the International System of Units(SI): The Modern Metric System3. Terminology3.1 Definitions:3.1.1 color splasha splash, smear, or streak of contrastingcolor evident on the inside or outside surface of the gloves thatwas deposited during the dipping operation and is vulcanizedinto the

9、 glove as part of the homogenous compound.3.1.2 glove cuff rollthe roll or reinforced edge of aninsulating glove at the cuff.3.1.3 halogenation treatmentexposure of the entire glovesurface area to a halogen for the purpose of reducing surfacefriction.3.1.4 ozonea very active form of oxygen that may

10、beproduced by corona, arcing, or ultraviolet rays.3.1.5 userthe employer or entity purchasing the equip-ment to be utilized by workers for their protection; in theabsence of such an employer or entity, the individual purchas-ing and utilizing the protective equipment.3.1.6 working areaall finger and

11、 thumb crotches, the palm(area between the wrist and the base of the finger and thumb)and the area of the finger and thumb facing the palm notextending beyond the center line of the crotch. See Fig. 1.3.1.7 For definitions of other terms, refer to TerminologyF 819.4. Significance and Use4.1 This spe

12、cification covers the minimum electrical,chemical, and physical properties guaranteed by the manufac-turer and the detailed procedures by which such properties areto be determined. The purchaser has the option to perform orhave performed any of these tests in order to verify the1This specification i

13、s under the jurisdiction of ASTM Committee F18 onElectrical Protective Equipment for Workers and is the direct responsibility ofSubcommittee F18.15 on Worker Personal Equipment. This standard replaces ANSIStandard J 6.6, which is no longer available.Current edition approved Oct. 1, 2008. Published N

14、ovember 2008. Originallyapproved in 1921. Last previous edition approved in 2006 as D 120 02a(2006).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 Do

15、cument Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.guarantee. Claims for failure to meet the specification aresubject to verification by the manufacturer.4.2 Gloves are used for personal protection

16、; therefore, whenauthorizing their use, a margin of safety shall be allowedbetween the maximum voltage on which they are used and theproof-test voltage at which they are tested. The relationshipbetween proof-test voltage and the maximum voltage at whichthe gloves shall be used is shown in Table 1.4.

17、3 Work practices vary from user to user and are dependentupon many factors. These may include, but are not limited to,operating system voltages, construction design, work proce-dure techniques, weather conditions, and so forth. Therefore,except for the restriction set forth in this specification bec

18、auseof design limitations, the use and maintenance of this equip-ment is beyond the scope of this specification.4.4 It is common practice and the responsibility of the userof this type of protective equipment to prepare completeinstructions and regulations to govern the correct and safe useof such e

19、quipment.5. Classification5.1 Gloves covered under this specification shall be desig-nated as Type I or Type II; Class 00, Class 0, Class 1, Class 2,Class 3, or Class 4.5.1.1 Type I, non-resistant to ozone, made from a high-gradecis-1,4-polyisoprene rubber compound of natural or syntheticorigin, pro

20、perly vulcanized.5.1.2 Type II, ozone-resistant made of any elastomer orcombination of elastomeric compounds.5.1.3 The class designation shall be based on the electricalproperties as shown in Table 2 and Table 3.6. Ordering Information6.1 Orders for gloves under this specification should includethe

21、following information:6.1.1 Type,6.1.2 Class,6.1.3 Length, Fig. 26.1.4 Size,6.1.5 Color,6.1.6 Cuff design, and6.1.7 With or without a halogenation treatment.6.2 The listing of types, classes, lengths, sizes, colors, andcuff designs is not intended to mean that all shall necessarily beavailable from

22、manufacturers; it signifies only that, if made,they shall conform to the details of this specification.7. Manufacture and Marking7.1 The gloves shall be produced by a seamless process.FIG. 1 Working Area of a Rubber Insulating GloveTABLE 1 Proof-Test/Use Voltage RelationshipClass of GloveAC Proof-Te

23、stVoltage, rms, VMaximum ACUse Voltage acrms, VDC Proof-TestVoltage, avg, VMaximum DC UseVoltage avg, V00 2 500 500 10 000 7500 5 000 1 000 20 000 1 5001 10 000 7 500 40 000 11 2502 20 000 17 000 50 000 25 5003 30 000 26 500 60 000 39 7504 40 000 36 000 70 000 54 000D1200827.2 The gloves shall have

24、a smooth finish and the cuff edgesshall be finished with a roll or a reinforcing strip of rubber,unless otherwise specified.7.3 Each glove shall be marked clearly and permanentlywith the name of the manufacturer or supplier, ANSI/ASTM D120, type, class, and size.All such marking shall be confined to

25、the cuff portion of the glove and shall be nonconducting andapplied in such a manner as to not impair the requiredproperties of the glove.7.3.1 Each glove shall be marked with a label that gives theinformation specified in 7.3. This label shall be the colorspecified for each voltage class: Class 00b

26、eige, Class0red, Class 1white, Class 2yellow, Class 3green, andClass 4orange.7.4 At the request of the user, the gloves may be given ahalogenation treatment to reduce surface friction. This treat-ment shall have no detrimental effect on the electrical, chemi-cal, or physical properties of the gloves

27、.8. Dimensions and Permissible Variations8.1 Sample gloves selected in accordance with 13.2 shallfall within the thickness limits specified in Table 4, whendetermined in accordance with 17.1.8.2 Sample gloves selected in accordance with 13.2 shallconform to standard sizes when determined in accordan

28、ce with17.2. Standard sizes are 203 mm (8 in.), 216 mm (812 in.), 229mm (9 in.), 241 mm (912 in.), 254 mm (10 in.), 267 mm (1012in.), 279 mm (11 in.), 292 mm (1112 in.), and 305 mm (12 in.).The permissible variation in size shall be 613 mm (612 in.).8.3 Sample gloves selected in accordance with 13.2

29、 shallconform to standard lengths when measured in accordancewith 17.3.8.3.1 Standard lengths for Class 00 gloves are 280 mm (11in.), and 360 mm (14 in.). The permissible variations shall be613 mm (612 in.).8.3.2 Standard lengths for Class 0 gloves are 280 mm (11in.), 360 mm (14 in.), 410 mm (16 in.

30、), and 460 mm (18 in.).The permissible variations shall be 613 mm (612 in.).8.3.3 Standard lengths for Class 1, 2, and 3 gloves are 360mm (14 in.), 410 mm (16 in.), and 460 mm (18 in.). Thepermissible variation shall be 613 mm (612 in.).8.3.4 Standard lengths for Class 4 gloves are 410 mm (16in.) an

31、d 460 mm (18 in.). The permissible variation shall be613 mm (612 in.).9. Workmanship and Finish9.1 Gloves shall be free on both inner and outer surface ofharmful physical irregularities that can be detected by thoroughtest and inspection.9.1.1 Harmful physical irregularities may be defined as anyfea

32、ture that disrupts the uniform, smooth surface contour andrepresents a potential hazard to the user, such as pinholes,cracks, blisters, cuts, conductive embedded foreign matter,creases, pinch marks, voids (entrapped air), prominent ripples,and prominent mold marks.9.2 Nonharmful physical irregularit

33、ies may be defined assurface irregularities present on the inner and outer surfaces ofthe rubber glove due to imperfections on forms or molds andinherent difficulties in the manufacturing process. These irregu-larities may appear as mold marks that look like cuts eventhough they are actually a raise

34、d ridge of rubber, indentations,protuberances, embedded foreign material, or color splashesthat are acceptable provided that:9.2.1 The indentations, protuberance or mold marks tend toblend into a smooth slope upon stretching of the material.9.2.2 The rubber thickness at any irregularity conforms tot

35、he thickness requirements.9.2.3 Foreign material remains in place when the glove isfolded and stretched with the material surrounding it.9.2.4 Color splashes are no larger than 1 mm in anydirection on the inner surface of the work area.9.2.4.1 The working area is defined as all finger and thumbcrotc

36、hes, the palm (area between the wrist and the base of thefinger and thumb) and the area of the finger and thumb facingthe palm not extending beyond the center line of the crotch.See Fig. 1.10. Chemical and Physical Requirements10.1 Glove test material taken from sample gloves selectedin accordance w

37、ith 13.3 shall conform to physical requirementsin Table 5 and the accelerated aging in 19.2.6.TABLE 2 AC Voltage Requirement Proof Test CurrentsAClass ofGloveProof-TestVoltage,rms, VMinimumBreakdownVoltage,rms, VMaximum Proof-Test Current, mA280-mm(11-in.) Glove360-mm(14-in.) Glove410-mm(16-in.) Glo

38、ve460-mm(18-in.) Glove50Hz 60Hz 50Hz 60Hz 50Hz 60Hz 50Hz 60HZ00 2 500 4 000 6.7 8 10 12BBBB0 5 000 6 000 6.7 8 10 12 11.7 14 13.3 161 10 000 20 000 . . 11.7 14 13.3 16 15 182 20 000 30 000 . . 13.3 16 15 18 16.7 203 30 000 40 000 . . 15 18 16.7 20 18.3 224 40 000 50 000 . . . . 18.3 22 20 24AProof t

39、est current shall be measured to an accuracy of 61 mA.BNot applicable.TABLE 3 DC Voltage RequirementsClass of GloveProof-TestVoltage avg VMinimum BreakdownVoltage avg V00 10 000 13 0000 20 000 35 0001 40 000 60 0002 50 000 70 0003 60 000 80 0004 70 000 90 000D12008310.2 In the event of a dispute, th

40、e identification of the rubberpolymer in Type I gloves shall be performed in accordancewith 19.1.10.3 Type II glove test material taken from sample glovesselected in accordance with 13.3 shall show no visible effectsof ozone when tested in accordance with 18.6. Any visiblesigns of ozone deterioratio

41、n of the glove material, such aschecking, cracking, breaks, pitting, and so forth, shall beconsidered as evidence of failure to meet the requirements ofType II gloves.11. Electrical Requirements11.1 Each glove shall be given a proof test and shallwithstand the 50-Hz or 60Hz AC proof-test voltage (rm

42、svalue) or the dc proof-test voltage (average value) specified inTable 2 or Table 3. The proof test shall be performed inaccordance with Section 18. The test voltage shall be appliedcontinuously for 3 min.11.1.1 When the ac proof test is used, the 60-Hz proof-testcurrent shall not exceed the values

43、specified in Table 2 at anytime during the test period. (Note 1).11.2 Sample gloves selected in accordance with 13.2 shallnot break down at voltages below those specified in Table 2 orTable 3 when tested in accordance with Section 18.11.2.1 Gloves that have been subjected to a minimumbreakdown volta

44、ge test shall not be used for electric protection.Proof test current shall be measured to an accuracy of 61 mA.11.3 Sample gloves selected in accordance with 13.2 shallbe subjected to a 50-Hz or 60Hz AC moisture absorption/proof test in accordance with Section 18.11.3.1 The 50-Hz or 60Hz AC proof te

45、st current shall notexceed the values specified in Table 2 by more than 2 mA.NOTE 1A proof-test current is an indication of the validity of theglove make-up, the dielectric constant of the type of material used, thethickness, and the total contact area under test.12. Guarantee12.1 The manufacturer o

46、r supplier shall replace, withoutcharge to the purchaser, unused gloves which, at any timewithin a period of nine (9) months from date of initial deliveryof shipment to the purchaser or his designee, fail to pass thetests in this specification. This guarantee will be binding on themanufacturer or su

47、pplier only if the gloves have been properlystored and have 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 two(2) months of the guarantee period unless otherwise

48、specified.NOTE 2Proper storage means that gloves are stored right side out, notdistorted and not stored directly above or in proximity to steam pipes,radiators, or other sources of artificial heat, or exposed to direct sunlightFIG. 2 Length and Contour Measurements on Contour Cuff GlovesTABLE 4 Thic

49、kness MeasurementsClass ofGloveMinimum ThicknessMaximum ThicknessIn Crotch Other Than Crotchmm in. mm in. mm in.00 0.20 0.008 0.25 0.010 0.75 0.0300 0.46 0.018 0.51 0.020 1.02 0.0401 0.63 0.025 0.76 0.030 1.52 0.0602 1.02 0.040 1.27 0.050 2.29 0.0903 1.52 0.060 1.90 0.075 2.92 0.1154 2.03 0.080 2.54 0.100 3.56 0.140TABLE 5 Physical RequirementsProperty Type I Type IITensile strength, min, Die C, MPa (psi) 17.2 (2500) 10.3 (1500)Tensile stress at 200 %, max, MPa (psi) 2.1 (300) 2.1 (300)Ultimate elongation, min, % 600 500Tension set, max at 400, % 25 2