1、Designation: D1050 05 (Reapproved 2011)Standard Specification forRubber Insulating Line Hose1This standard is issued under the fixed designation D1050; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A nu
2、mber in parentheses 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 Department of Defense.1. Scope1.1 This specification covers acceptance testing of rubberin
3、sulating line hose for use as a portable protective device forprotection of workers from accidental contact with live elec-trical conductors.1.2 Two types of line hose are provided and are designatedas Type I, non-resistant to ozone, and Type II and Type III,resistant to ozone.1.3 Five classes of li
4、ne hose, differing in electrical charac-teristics, are provided and are designated as Class 0, Class 1,Class 2, Class 3, and Class 4.1.4 Four styles of line hose, differing in design characteris-tics, are provided and are designated as Style A, Style B, StyleC, and Style D.1.5 The following precauti
5、onary caveat pertains only to thetest method portion, Sections 16, 17, 18, 19, of this specifica-tion: This standard does not purport to address all of the safetyconcerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety andhealth
6、practices and determine the applicability of regulatorylimitations prior to use. For specific precautionary statements,see 18.1.1.2. Referenced Documents2.1 ASTM Standards:2D297 Test Methods for Rubber ProductsChemicalAnaly-sisD412 Test Methods for Vulcanized Rubber and Thermo-plastic ElastomersTens
7、ionD570 Test Method for Water Absorption of PlasticsD573 Test Method for RubberDeterioration in an AirOvenD624 Test Method for Tear Strength of Conventional Vul-canized Rubber and Thermoplastic ElastomersD2865 Practice for Calibration of Standards and Equipmentfor Electrical Insulating Materials Tes
8、tingF819 Terminology Relating to Electrical Protective Equip-ment for Workers2.2 Federal Specification:3PPP-B-636 Box, Shipping, Filterboard2.3 ANSI Standards:4C2 National Electrical Safety Code, Section 44C 39.5 Safety Requirements for Electrical and ElectronicMeasuring and Controlling Instrumentat
9、ionC 84.1 Electric Power Systems and Equipment-VoltageRatings3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 breakdownthe electrical discharge or arc occurringbetween the electrodes and through the equipment being tested.3.1.2 flashoverthe electrical discharge or arc occurring
10、between electrodes and over or around, but not through, theequipment being tested.3.1.3 electrical testing facilitya location with qualifiedpersonnel, testing equipment, and procedures for the inspectionand electrical testing of electrical insulating protective equip-ment.3.1.4 electrode clearanceth
11、e shortest path from the ener-gized electrode to the ground electrode.3.1.5 insulatedseparated from other conducting surfacesby a dielectric substance (including air space) offering a highresistance to the passage of current.NOTE 1When any object is said to be insulated, it is understood to beinsula
12、ted in a suitable manner for the conditions to which it is subjected.Otherwise, it is, within the purpose of this definition, uninsulated.Insulating covering of conductors is one means of making the conductorinsulated.3.1.6 isolatedan object that is not readily accessible topersons unless special me
13、ans of access are used.1This 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. This standard replacesANSI Standard J 6.1, which is no longer availableCur
14、rent edition approved Sept. 1, 2011. Published September 2011. Originallyapproved in 1949 as D1050 49 T. Last previous edition approved in 2005 asD1050 051. DOI: 10.1520/D1050-05R11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.o
15、rg. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Standardization Documents, Order Desk, Bldg. 4, Section D,700 Robbins Ave., Philadelphia, PA 19111-5094, ATTN: NPODS.4Available from American National Standards In
16、stitute, 11 West 42nd Street,13th Floor, New York, NY 10036.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.1.7 ozonea very active form of oxygen that may beproduced by corona, arcing, or ultra-violet rays.3.1.8 ozone cutting and c
17、heckingthe cutting action pro-duced by ozone on rubber under mechanical stress into a seriesof interlacing cracks.3.1.9 rubbera generic term that includes elastomers andelastomeric compounds, regardless of origin.3.1.10 voltage, maximum usethe ac voltage (rms) ratingof the protective equipment that
18、designates the maximumnominal design voltage of the energized system that may besafely worked. The nominal design voltage is equal to thephase to phase voltage on multiphase circuits.3.1.11 If there is not multiphase exposure in a system areaand the voltage exposure is limited to phase (polarity on
19、dcsystems) to ground potential, the phase (polarity on dc sys-tems) to ground potential shall be considered to be the nominaldesign voltage. If electrical equipment and devices are insu-lated, or isolated, or both, such that the multiphase exposure ona grounded wye circuit is removed, then the nomin
20、al designvoltage may be considered as the phase-to-ground voltage onthat circuit.NOTE 2The work practices and methods associated with removingmultiphase exposures at any given work site are not addressed in thisspecification. Users should refer to ANSI C 2, National Safety Code,Section 44, for prope
21、r work practices.3.1.12 voltage, nominal designa nominal value consistentwith the latest revision on ANSI C 84.1, assigned to the circuitor system for the purpose of conveniently designating itsvoltage class.3.2 For definitions of other terms, refer to TerminologyF819.4. Significance and Use4.1 This
22、 specification 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 may at his option perform orhave performed any of these tests in order to verify theguarantee. Claims
23、 for failure to meet the specification aresubject to verification by the manufacturer.4.2 Line hose is used for personal protection; therefore,when authorizing its use, a margin of safety should be providedbetween the maximum voltage at which it is used and theproof-test voltage at which it is teste
24、d. The relationshipbetween proof-test voltage and the nominal maximum voltageat which line hose shall be used is shown in Table 1.4.3 It is common practice for the user of this type ofprotective equipment to prepare complete instructions andregulations to govern in detail the correct and safe use of
25、 suchequipment.5. Classification5.1 Line hose covered under this specification shall bedesignated as Type I, Type II, or Type III; Class 0, Class 1,Class 2, Class 3, or Class 4; Style A, Style B, Style C, or StyleD.5.1.1 Type I, non-resistant to ozone, made from a high-gradecis-1,4-polyisoprene rubb
26、er compound of natural or syntheticorigin, properly vulcanized.5.1.2 Type II, ozone resistant, made of any elastomer orcombination of elastomeric compounds.5.1.3 Type III, ozone resistant, made of any combination ofan elastomer and thermoplastic polymers, elastic in nature.5.1.4 The class designatio
27、n shall be based on the electricalproperties as shown in Table 1, Table 2,orTable 3.5.1.5 Style A line hose shall be designed in the straight stylewith a constant cross section throughout the length of the linehose (Fig. 1).5.1.6 Style B line hose shall be designed in the connector-end style, which
28、is similar to the straight style except that itTABLE 1 Proof-Test/Use Voltage RelationshipClass ofInsulating LineHoseNominalMaximumUse VoltageAPhase-Phase,ac rms, VAC Proof-Test Voltage,rms VDC Proof-Test Voltage,avg, V,0 1 000 5 000 20 0001 7 500 10 000 40 0002 17 000 20 000 50 0003 26 500 30 000 6
29、0 0004 36 000 40 000 70 000AExcept for Class O equipment, the maximum use voltage is based on thefollowing formula:Maximum use voltage = 0.095 ac proof-test voltage 2000The formula takes into account the reduction in the volts per mil capability of thematerial with increasing thickness.TABLE 2 AC Vo
30、ltage RequirementsTypes I, II, and IIIStyle A and BTypes II and IIIStyle C and DHose Size,ID, in.Test MandrelSize,in.AMinimum MinimumProof-Test Flashover Test Proof-test Flashover TestClass Voltage, Voltage,BClass Voltage, Voltage,Brms V rms V rms V rms V14316 0 5 000 6 000 0 5 000 7 00058916 1 10 0
31、00 12 000 1 10 000 20 00011516 2 20 000 22 000 2 20 000 30 000114 1316 2 20 000 25 000 2 20 000 35 000112 114 3 30 000 30 000 4 40 000 50 0002134 3 30 000 32 000 4 40 000 50 000212 214 3 30 000 35 000 4 40 000 60 000ACommercially available copper, brass, or iron tubing, conduit, or rod that approxim
32、ates these nominal sizes is acceptable.BThe flashover test values investigate design capability of each style of line hose.D1050 05 (2011)2shall have a molded connector permanently affixed to one endof the line hose (Fig. 1).5.1.7 Style C line hose shall be designed in the extended-lipstyle with maj
33、or outward extending lips (Fig. 1).5.1.8 Style D line hose shall be designed in the extended lipstyle with major outward extending lips. It shall have a moldedconnector permanently affixed to one end of the line hose (Fig.1).NOTE 3Rubber insulating line hose should remain suitably flexiblefor applic
34、ation and removal through normal working temperatures of 29to 54.5C (20 to 130F).NOTE 4Separate molded connectors are available to connect twolengths of Style A or Style C line hose.6. Ordering Information6.1 Orders for line hose under this specification shouldinclude the following information:6.1.1
35、 Type,6.1.2 Class,6.1.3 Style,6.1.4 Size, and6.1.5 Length.6.2 The listing of types, classes, styles, sizes, and lengths isnot intended to mean that all shall necessarily be available frommanufacturers; it signifies only that, if made, they shallconform to the details of this specification. In additi
36、on, lengthsother than standard lengths may be obtained to meet fieldconditions.6.3 Factory-produced openings located on the top, sides, orlips of the hose are permissible. These openings must bespecified on the purchase order and shall not be larger than 25mm (1 in.) in diameter and the center of th
37、e opening shall notbe more than 25 mm from the end of the hose or less than 25mm from the edge of the lips.7. Manufacture and Marking7.1 The line hose shall be constructed in four styles: straightstyle, connector-end style, extended-lip style, and connector-end extended-lip style. The line hose shal
38、l be formed with aninterlocking lip of sufficient length to prevent the device frombeing dislodged accidentally from the conductor it covers. Theinterlocking lip shall be closely adjacent to the inside surfacecontour of the outer wall. The adapter end of connector-endstyle line hose shall be not les
39、s than 140 mm (512 in.) deep, andits inside diameter shall be such that it will snugly grip the endof the line hose of the same size which it joins.7.2 Each line hose shall be marked clearly and permanentlywith the name of manufacturer or supplier, type, class, andASTM D1050. Line hose may be marked
40、 by either molding theinformation directly into the hose or by use of a label; eithermethod is equally acceptable. The method shall be at thediscretion of the manufacturer. If a label is used, the color shallbe that specified for each voltage class: Class 0red, Class1white, Class 2yellow, Class 3gre
41、en, and Class4orange.8. Chemical and Physical Properties8.1 Each line hose shall conform to the physical require-ments in Table 4 and, for Type I line hose, the determination ofrubber polymer in accordance with 19.1.1.TABLE 3 DC Voltage RequirementsHose Size,ID, in.Test MandrelSize,in.ATypes I, II,
42、and IIIStyle A and BTypes II and IIIStyle C and DMinimum MinimumProof-Test Flashover Test Proof-test Flashover TestClass Voltage,BVoltage,C, DClass Voltage,BVoltage,C, Davg V avg V avg V avg V14316 0 10 000 12 000 0 10 000 15 00058916 1 30 000 30 000 1 30 000 55 00011516 2 35 000 35 000 2 35 000 60
43、000114 1316 2 35 000 45 000 2 35 000 65 000112 114 3 50 000 50 000 4 60 000 75 0002134 3 50 000 60 000 4 60 000 75 000212 214 3 50 000 70 000 4 70 000 90 000ACommercially available copper, brass, or iron tubing, conduit, or rod that approximates these nominal sizes is acceptable.Bdc proof-test value
44、s shown in Table 3 are limited due to the inability to seal lip openings.CThe flashover test values investigate design capability of each style of line hose.Ddc flashover values were determined using negative polarity.FIG. 1 Typical StylesD1050 05 (2011)39. Electrical Requirements9.1 Each line hose
45、shall withstand the 60-Hz ac proof-testvoltage (rms value) specified in Table 2 or the dc proof testvoltage (average value) specified in Table 3. The proof testshall be performed in accordance with Section 18 and shall berun continuously for 3 min.9.2 Sample lengths of line hose, as specified in 14.
46、3.2 and14.3.3, shall pass the minimum flashover test values of Table 2or 3 when tested in accordance with 18.2.9.3 Sample lengths of Type II and Type III line hose, asspecified in 14.3.4, shall show no visible effects from ozonewhen tested in accordance with 18.3. Any visible signs ofozone deteriora
47、tion, such as checking, cracking, breaks, pit-ting, etc., shall be considered as evidence of failure to meet therequirements of Type II and Type III line hose.10. Dimensions and Permissible Variations10.1 SizeThe inside diameter shall indicate the size of theline hose. Standard sizes shall be: 6.3 m
48、m (14 in.), 25 mm (1in.), 31.5 mm (114 in.), 40 mm (112 in.), 50 mm (2 in.), and63.0 mm (212 in.). The permissible variation in size shall be62.0 mm (6116 in.).10.2 LengthLength shall be measured from end to end.Standard lengths for Styles A and C line hose shall measure915 mm (3 ft), 1372 mm (4.5 f
49、t) or 1820 mm (6 ft), with apermissible variation of 612.7 mm (6 0.5 in.). Standardoverall lengths for Style B and D line hose shall be the sameoverall lengths as specified for straight type. The permissiblevariation in length for the connector-end shall be 612.7 mm(60.5 in.). In addition, lengths other than standard lengths maybe obtained to meet field conditions.10.3 ThicknessThe wall thickness shall not be less than3.2 mm (0.12 in.) for Class 0, 5.1 mm (0.20 in.) for Class 1, 5.6mm (0.22 in.) for Class 2, 6.4 mm (
