1、Designation: D120 14D120 14aStandard Specification forRubber Insulating Gloves1This standard is issued under the fixed designation D120; 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 parenth
2、eses 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 U.S. Department of Defense.1. Scope1.1 This specification covers manufacturing and testing of rubber insu
3、lating gloves for protection of workers from electricalshock.1.2 Two types of gloves are provided and are designated as Type I, non-resistant to ozone, and Type II, resistant to ozone.1.3 Six classes of gloves, differing in electrical characteristics, are provided and are designated as Class 00, Cla
4、ss 0, Class 1,Class 2, Class 3, and Class 4.1.4 The values stated in SI units are to be regarded as standard. See IEEE/ASTM SI 10.1.5 The following safety hazards caveat pertains only to the test method portion, Sections 16, 17, 18, and 19, of thisspecification: This standard does not purport to add
5、ress all of the safety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability ofregulatory limitations prior to use.For specific precaution statements, see 18.2.2. Referenced
6、 Documents2.1 ASTM Standards:2D297 Test Methods for Rubber ProductsChemical AnalysisD412 Test Methods for Vulcanized Rubber and Thermoplastic ElastomersTensionD573 Test Method for RubberDeterioration in an Air OvenD624 Test Method for Tear Strength of Conventional Vulcanized Rubber and Thermoplastic
7、 ElastomersD1415 Test Method for Rubber PropertyInternational HardnessD2240 Test Method for Rubber PropertyDurometer HardnessD2865 Practice for Calibration of Standards and Equipment for Electrical Insulating Materials TestingF819 Terminology Relating to Electrical Protective Equipment for WorkersIE
8、EE/ASTM SI 10 American National Standard for Metric Practice3. Terminology3.1 Definitions:3.1.1 color splasha splash, smear, or streak of contrasting color evident on the inside or outside surface of the gloves that wasdeposited during the dipping operation and is vulcanized into the glove as part o
9、f the homogenous compound.3.1.2 glove cuff rollthe roll or reinforced edge of an insulating glove at the cuff.3.1.3 halogenation treatmentexposure of the entire glove surface area to a halogen for the purpose of reducing surfacefriction.3.1.4 ozonea very active form of oxygen that may be produced by
10、 corona, arcing, or ultraviolet rays.3.1.5 userthe employer or entity purchasing the equipment to be utilized by workers for their protection; in the absence ofsuch an employer or entity, the individual purchasing and utilizing the protective equipment.1 This specification is under the jurisdiction
11、of ASTM Committee F18 on Electrical Protective Equipment for Workers and is the direct responsibility of SubcommitteeF18.15 on Worker Personal Equipment. This standard replaces ANSI Standard J 6.6, which is no longer available.Current edition approved April 1, 2014Nov. 1, 2014. Published April 2014D
12、ecember 2014. Originally approved in 1921. Last previous edition approved in 20092014 asD120 09.D120 14. DOI: 10.1520/D0120-14.10.1520/D0120-14A.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsv
13、olume information, refer to the standards Document Summary page on the ASTM website.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 ad
14、equately depict all changes accurately, ASTM recommends that 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 Conshoh
15、ocken, PA 19428-2959. United States13.1.6 working areaall finger and thumb crotches, the palm (area between the wrist and the base of the finger and thumb) andthe area of the finger and thumb facing the palm not extending beyond the center line of the crotch. See Fig. 1.3.1.7 For definitions of othe
16、r terms, refer to Terminology F819.4. Significance and Use4.1 This specification covers the minimum electrical, chemical, and physical properties guaranteed by the manufacturer and thedetailed procedures by which such properties are to be determined. The purchaser has the option to perform or have p
17、erformedany of these tests in order to verify the guarantee. Claims for failure to meet the specification are subject to verification by themanufacturer.4.2 Gloves are used for personal protection; therefore, when authorizing their use, a margin of safety shall be allowed betweenthe maximum voltage
18、on which they are used and the proof-test voltage at which they are tested. The relationship betweenproof-test voltage and the maximum voltage at which the gloves shall be used is shown in Table 1.4.3 Work practices vary from user to user and are dependent upon many factors. These may include, but a
19、re not limited to,operating system voltages, construction design, work procedure techniques, weather conditions, and so forth. Therefore, except forthe restriction set forth in this specification because of design limitations, the use and maintenance of this equipment is beyondthe scope of this spec
20、ification.4.4 It is common practice and the responsibility of the user of this type of protective equipment to prepare complete instructionsand regulations to govern the correct and safe use of such equipment.5. Classification5.1 Gloves covered under this specification shall be designated as Type I
21、or Type II; Class 00, Class 0, Class 1, Class 2, Class3, or Class 4.5.1.1 Type I, non-resistant to ozone, made from a high-grade cis-1,4-polyisoprene rubber compound of natural or syntheticorigin, properly vulcanized.5.1.2 Type II, ozone-resistant made of any elastomer or combination of elastomeric
22、compounds.5.1.3 The class designation shall be based on the electrical properties as shown in Table 2 and Table 3.6. Ordering Information6.1 Orders for gloves under this specification should include the following information:6.1.1 Type,6.1.2 Class,FIG. 1 Working Area of a Rubber Insulating GloveD120
23、 14a26.1.3 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, and cuff designs is not intended to mean that all shall necessarily beavailable from manufacturers; it signifies only that,
24、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.7.2 The gloves shall have a smooth finish and the cuff edges shall be finished with a roll or a reinforcing strip of rubber, unlessotherwise specified.7.3
25、 Each glove shall be marked clearly and permanently with the name of the manufacturer or supplier, ASTM D120, type,class, and size. All such marking shall be confined to the cuff portion of the glove and shall be nonconducting and applied in sucha manner as to not impair the required properties of t
26、he glove.7.3.1 Each glove shall be marked with a label that gives the information specified in 7.3. This label shall be the color specifiedfor each voltage class: Class 00beige, Class 0red, Class 1white, Class 2yellow, Class 3green, and Class 4orange.7.4 At the request of the user, the gloves may be
27、 given a halogenation treatment to reduce surface friction. This treatment shallhave no detrimental effect on the electrical, chemical, or physical properties of the gloves.8. Dimensions and Permissible Variations8.1 Sample gloves selected in accordance with 13.2 shall fall within the thickness limi
28、ts specified in Table 4, when determinedin accordance with 17.1.8.2 Sample gloves selected in accordance with 13.2 shall conform to standard sizes when determined in accordance with 17.2.Standard sizes are 203 mm (8 in.), 216 mm (812 in.), 229 mm (9 in.), 241 mm (912 in.), 254 mm (10 in.), 267 mm (1
29、012 in.), 279mm (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 shall conform to standard lengths when measured in accordance with 17.3.8.3.1 Standard lengths for Class 00 gloves are 280
30、mm (11 in.), and 360 mm (14 in.). The permissible variations shall be 613mm (612 in.).8.3.2 Standard lengths for Class 0 gloves are 280 mm (11 in.), 360 mm (14 in.), 410 mm (16 in.), and 460 mm (18 in.). Thepermissible variations shall be 613 mm (612 in.).8.3.3 Standard lengths for Class 1, 2, and 3
31、 gloves are 360 mm (14 in.), 410 mm (16 in.), and 460 mm (18 in.). The permissiblevariation shall be 613 mm (612 in.).8.3.4 Standard lengths for Class 4 gloves are 410 mm (16 in.) and 460 mm (18 in.). The permissible variation shall be 613 mm(612 in.).9. Workmanship and Finish9.1 Gloves shall be fre
32、e on both inner and outer surface of harmful physical irregularities that can be detected by thorough testand inspection.9.1.1 Harmful physical irregularities may be defined as any feature that disrupts the uniform, smooth surface contour andrepresents a potential hazard to the user, such as pinhole
33、s, cracks, blisters, cuts, conductive embedded foreign matter, creases, pinchmarks, voids (entrapped air), prominent ripples, and prominent mold marks.9.2 Nonharmful physical irregularities may be defined as surface irregularities present on the inner and outer surfaces of therubber glove due to imp
34、erfections on forms or molds and inherent difficulties in the manufacturing process. These irregularitiesmay appear as mold marks that look like cuts even though they are actually a raised ridge of rubber, indentations, protuberances,embedded foreign material, or color splashes that are acceptable p
35、rovided that:TABLE 1 Proof-Test/Use Voltage RelationshipClass of Glove AC Proof-TestVoltage, 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
36、26 500 60 000 39 7504 40 000 36 000 70 000 54 000D120 14a39.2.1 The indentations, protuberance or mold marks tend to blend into a smooth slope upon stretching of the material.9.2.2 The rubber thickness at any irregularity conforms to the thickness requirements.9.2.3 Foreign material remains in place
37、 when the glove is folded and stretched with the material surrounding it.9.2.4 Color splashes are no larger than 1 mm in any direction on the inner surface of the work area.9.2.4.1 The working area is defined as all finger and thumb crotches, the palm (area between the wrist and the base of the fing
38、erand thumb) and the area of the finger and thumb facing the 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 selected in accordance with 13.3 shall conform to physical requirements inTable 5 a
39、nd the accelerated aging in 19.2.6.10.2 In the event of a dispute, the identification of the rubber polymer in Type I gloves shall be performed in accordance with19.1.10.3 Type II glove test material taken from sample gloves selected in accordance with 13.3 shall show no visible effects ofozone when
40、 tested in accordance with 18.6. Any visible signs of ozone deterioration of the glove material, such as checking,cracking, breaks, pitting, and so forth, shall be considered as evidence of failure to meet the requirements of Type II gloves.11. Electrical Requirements11.1 Each glove shall be given a
41、 proof test and shall withstand the 50-Hz or 60Hz AC proof-test voltage (rms value) or thedc proof-test voltage (average value) specified in Table 2 or Table 3. The proof test shall be performed in accordance with Section18. The test voltage shall be applied continuously for 3 min.11.1.1 When the ac
42、 proof test is used, the 60-Hz proof-test current shall not exceed the values specified in Table 2 at any timeduring the test period. (Note 1).11.2 Sample gloves selected in accordance with 13.2 shall not break down at voltages below those specified in Table 2 or Table3 when tested in accordance wit
43、h Section 18.11.2.1 Gloves that have been subjected to a minimum breakdown voltage test shall not be used for electric protection. Prooftest current shall be measured to an accuracy of 61 mA.11.3 Sample gloves selected in accordance with 13.2 shall be subjected to a 50-Hz or 60HzAC moisture absorpti
44、on/proof testin accordance with Section 18.11.3.1 The 50-Hz or 60Hz AC proof test current shall not exceed the values specified in Table 2 by more than 2 mA.NOTE 1A proof-test current is an indication of the validity of the glove make-up, the dielectric constant of the type of material used, the thi
45、ckness,and the total contact area under test.12. Guarantee12.1 The manufacturer or supplier shall replace, without charge to the purchaser, unused gloves which, at any time within aperiod of nine (9) months from date of initial delivery of shipment to the purchaser or his designee, fail to pass the
46、tests in thisTABLE 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.) Glove460-mm(18-in.) Glove50Hz 60Hz 50Hz 60Hz 50Hz 60Hz 50Hz 60HZ00 2 500 4 000 6.7 8
47、 10 12 B B B B0 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 24A Proof test current shall be measured to an accuracy of 1 mA.B Not applicable.TABLE
48、3 DC Voltage RequirementsClass of Glove Proof-TestVoltage avg V Minimum 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 000D120 14a4specification. This guarantee will be binding on the manufacturer or supplier only if the gloves have been
49、 properly stored and havenot 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 2Proper storage means that gloves are stored right side out, not distorted and not stored directly above or in proximity to steam pipes, radiators,or other sources of artificial heat, or exposed to direct sunlight or other sources of ozone. It is desirable that the
