1、Designation: D 1050 05e1Standard Specification forRubber Insulating Line Hose1This standard is issued under the fixed designation D 1050; 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 parent
2、heses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.e1NOTE18.1.2 was corrected editorially in March 2005.1. Scope1.1 This specificati
3、on covers acceptance testing of rubberinsulating 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,r
4、esistant to ozone.1.3 Five classes of line 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
5、, and Style D.1.5 The following precautionary 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
6、 establish appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use. For specific precautionary statements,see 18.1.1.2. Referenced Documents2.1 ASTM Standards:2D 297 Test Methods for Rubber ProductsChemicalAnalysisD 412 Test Methods for Vulcanized
7、 Rubber and Thermo-plastic Rubbers and Thermoplastic ElastomersTensionD 570 Test Method for Water Absorption of PlasticsD 573 Test Method for RubberDeterioration in an AirOvenD 624 Test Method for Tear Strength of ConventionalVulcanized Rubber and Thermoplastic ElastomersD 2865 Practice for Calibrat
8、ion of Standards and Equip-ment for Electrical Insulating Materials TestingF 819 Terminology Relating to Electrical Protective Equip-ment for Workers2.2 Federal Specification:PPP-B-636 Box, Shipping, Filterboard32.3 ANSI Standards:4C 2 National Electrical Safety Code, Section 44C 39.5 Safety Require
9、ments for Electrical and ElectronicMeasuring and Controlling InstrumentationC 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 equipm
10、ent being tested.3.1.2 flashoverthe electrical discharge or arc occurringbetween 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 o
11、f electrical insulating protective equip-ment.3.1.4 electrode clearancethe 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.NO
12、TE 1When any object is said to be insulated, it is understood to beinsulated in a suitable manner for the conditions to which it is subjected.1This specification is under the jurisdiction of ASTM Committee F18 onElectrical Protective Equipment for Workers and is the direct responsibility ofSubcommit
13、tee F18.25 on Insulating Cover-up Equipment. This standard replacesANSI Standard J 6.1, which is no longer availableCurrent edition approved Jan. 1, 2005. Published February 2005. Originallyapproved in 1949 as D 1050 49 T. Last previous edition approved in 1999 asD 1050 90(1999).2For referenced ASTM
14、 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 page onthe ASTM website.3Available from Standardization Documents, Order Desk, Bldg. 4, Section D,700 Rob
15、bins Ave., Philadelphia, PA 19111-5094, ATTN: NPODS.4Available from American National Standards Institute, 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.Otherwise, it is, within th
16、e 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 means of access are used.3.1.7 ozonea very active form of oxygen that may beproduced by corona, ar
17、cing, or ultra-violet rays.3.1.8 ozone cutting and checkingthe 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 v
18、oltage (rms) ratingof the protective equipment that 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 th
19、e voltage exposure is limited to phase (polarity on 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
20、 ona grounded wye circuit is removed, then the nominal 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
21、ANSI C 2, National Safety Code,Section 44, for proper 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, refe
22、r to TerminologyF 819.4. Significance and Use4.1 This 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 o
23、f these tests in order to verify theguarantee. Claims 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 i
24、s used and theproof-test voltage at which it is tested. 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 andregula
25、tions to govern in detail the correct and safe use of 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 o
26、zone, made from a high-gradecis-1,4-polyisoprene rubber 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 p
27、olymers, elastic in nature.5.1.4 The class designation shall be based on the electricalproperties as shown in Table 1, Table 2,orTable 3.TABLE 1 Proof-Test/Use Voltage RelationshipClass ofInsulating LineHoseNominalMaximumUse VoltageAPhase-Phase,ac rms, VAC Proof-Test Voltage,rms VDC Proof-Test Volta
28、ge,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 60 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 reduct
29、ion in the volts per mil capability of thematerial with increasing thickness.TABLE 2 AC Voltage 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,BCl
30、ass Voltage, Voltage,Brms V rms V rms V rms V14316 0 5 000 6 000 0 5 000 7 00058916 1 10 000 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
31、60 000ACommercially available copper, brass, or iron tubing, conduit, or rod that approximates these nominal sizes is acceptable.BThe flashover test values investigate design capability of each style of line hose.D 1050 05e125.1.5 Style A line hose shall be designed in the straight stylewith a const
32、ant 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 is similar to the straight style except that itshall have a molded connector permanently affixed to one endof the line hose (Fig. 1).5.1.7 Style C line hose sh
33、all be designed in the extended-lipstyle with major 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 li
34、ne hose should remain suitably flexiblefor application 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 specificat
35、ion shouldinclude the following information:6.1.1 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 shallconfor
36、m to the details of this specification. In addition, 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 t
37、han 25mm (1 in.) in diameter and the center of the 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 con
38、nector-end extended-lip style. The line hose shall 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
39、 of connector-endstyle line hose shall be not less 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, ty
40、pe, class, andASTM D 1050. Line hose may be marked by either moldingthe information 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:
41、Class 0red, Class1white, Class 2yellow, Class 3green, and Class4orange.TABLE 3 DC Voltage RequirementsHose Size,ID, in.Test MandrelSize,in.ATypes I, II, and IIIStyle A and BTypes II and IIIStyle C and DMinimum MinimumProof-Test Flashover Test Proof-test Flashover TestClass Voltage,BVoltage,C, DClass
42、 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 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
43、000 90 000ACommercially available copper, brass, or iron tubing, conduit, or rod that approximates these nominal sizes is acceptable.Bdc proof-test values 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
44、line hose.Ddc flashover values were determined using negative polarity.FIG. 1 Typical StylesD 1050 05e138. 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
45、.9. Electrical Requirements9.1 Each line hose 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 Sa
46、mple lengths of line hose, as specified in 14.3.2 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
47、with 18.3. Any visible signs ofozone deterioration, 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 o
48、f theline hose. Standard sizes shall be: 6.3 mm (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 h
49、ose shall measure915 mm (3 ft), 1372 mm (4.5 ft) 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 Cl
