1、MIL-I-3158D 7 October 1968 SUPERSEDING MILI-315 8C 2 April 1958 (See 6.4 and 6.51 MILITARY SPECIFICATION INSULATION TAPE, ELECTRICAL GLASS-FIBER (RESIN-FILLED) : AND CORD, FIBROUS-GLASS This specification is mandatory for use by all Departments and Agencies of the Department of Defense. # 1. SCOPE 1
2、.1 Scope. This specification covers resin treated glass-fiber electrical insulation for use in the insulation of electric cables. 1.2 Classification. Electrical insulation shall be of the following forms and types, as specified (see 6.2): Tape: Type SR-1 - Coated, Frayproof (for cable sealing). Cord
3、age: Type SR-4 - For cable installation. Type SR-4.5 - Lacing cord for cable installation. Type SR-5 - For cable installation (color coded). 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of the specifica
4、tion to the extent specified herein. SPECIFICATIONS FEDERAL II-B-681 - Brushes, Typewriter l“-S-735 PPP-B-566 - Boxes, Folding, Paperboard. PPP-B-636 - Box, Fiberboard. PPP-B-640 - Boxes, Fiberboard, Corrugated, Triple-Wall. PPP-B-676 - Boxes, Setup. PPP-T-4.5 - Standard Test Fluids, Hydrocarbon. -
5、Tape, Gummed, Paper, Reinforced and Plain, For Sealing and Securing. MILITARY MIL-Y-ll+O - Yarn, Cord, Sleeving, Cloth, and Tape - Glass. # STANDARDS .- . . .r MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes. MIL-STD-iz9 -Marking for Shipment and Storage. (Copies o
6、f specifications, standards, drawings, and publications required by suppliers in 3nne tion with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer. ) 2.2 Other publications. The following documents form a part of this specification
7、 to the extent specified herein. quest for proposal shall apply. Unless otherwise indicated, the issue in effect on date of invitation for bids or re- iJNIFw CLASSIFICATION COMCllEX Uniform Freight Classification Rules. FSC 5970 Provided by IHSNot for ResaleNo reproduction or networking permitted wi
8、thout license from IHS-,-,-MIL-I-3158D 57 m 777770b OOb71 T m MIL-I-3158D (Application for copies should be addressed to the Uniform Classification Committee, 202 Jnion Station, 516 W. Jackson Boulevard, Chicago, Illinois 6606.) AMERICAN TRUCKING ASSOCIATIONS, IIC. National Motor Freight Classificat
9、ion Xules. (Application for copies should be addressed to the American Trucking Associations, Inc., 1616 P Street, N. W., Washington, D. C. 22036.) 3. REQUIREMENTS 3.1 T.We SR-1. Tape may be made by treating glass-fiber tape of the specified width or by cutting cloth or wider tape after treating, pr
10、ovided the finished tape conforms to this specification. 3.1.1 Uncoated material. The uncoated fabric shall be continuous filament glass-fiber cloth con- forming to form 4, class C, cloth number 112 of MIL-Y-1140. 3.1.2 Coating. Unless otherwise specified in the contract or order (see 6.2), the fabr
11、ic shall be coated with (vinyl) resin suitably compounded and blocked. coating method to both sides of the fabric so that it is completely impregnated and coated. coating is not permissible. the finished material shall be black. The coating shall be applied by the knife Calendar The coating shall be
12、 of such a nature as not to permit peeling. The color of 3.1.3 Dimensions. Unless otherwise specified (see 6.2), tape shall be furnished in 25-ya1-d lengths rolled on a 1-1/2 inch diameter core, in l/Z, 1, 2, 3, 4, 5, or 6 inch widths (see 4.4.1.4.2 for measure- ment of width). The finishsd msterial
13、 shall have an average thickness of not less than 0.006 inch (meas- uring not less than O.QO55 inch in any area). 3.1.4 Breaking strength. pounds per inch width (see f+J+.l.l). The breaking strength of the finished tape shall be not less than 80 3.1.5 Flammability. The length of the burned portion s
14、hall not exceed 2.75 inches and no flame indicator on any of the specimens shall show any signs of scorching, burning, or decompositon by flame when tested as specified in 4.4.1.2. 3.1.6 Flexibilite. The coating shall not crack or fracture when the tape is tested as specified in 4.4.1.3. 3.1.7 Chemi
15、cal resistance. There shall be no softening, loosening, or peeling of the coating from the fabric when tested as specified in 4.4.1.5. 3.2 T,ype SR-4. The material shall consist of glass-fiber cordage, coated with a suitable synthetic resin. 3.2.1 Uncoated material. The glass-fiber cordage, before c
16、oating, shall conform to form 2, class C, cordage number EC9-44 of MIL-Y-1140. 3.2.2 Coating. Unless otherwise specified in the contract or order (see 6.2), the cordage shall be coated with a suitable synthetic resin composition gray in color. 3.2.3 Dimensions. The diameter of the completed cord sha
17、ll be 0.063 -f 0.004 inch when measured as specified in 4.4.2.3. specified (see 6.2). The finished material shall be furnished in 1/2 pound spools unless otherwise 3.2.4 Breaking strength. The breaking strength of the finished cordage shall be not less than that specified for th3 untreated EC9-4-U c
18、ordage of ML-Y-1140 (see 3.2.1). continue to flame (as i:dicated by flaming additional to that of the Tirrill burner and usually of a different color) after the fifth cycle of flame application, when tested as specified in 4.4.2.2. cordage shall remain in place during the test. 3.2.5 Flmabilit . The
19、 compoun3. shall not drip from the specimen during the test and shall not The 3.2.6 Blockin . The layers of cord shall not bend to ths extent that the coating is removed or visibly damaged whe: the layer is unwound (see 4.4.2.4). 3.2.7 Coating durability. The looped cords shall not break at less tha
20、n 40 pounds when tested as specified in 4.4.2.5. 3.2.8 Chemical resistance. There shall be no softening, loosening, or peeling of the coating from the cordage when tested as specified in 4.4.2.6. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Q I
21、MIL-1-3158D 3.3 T.we SR-4.5. The material shall consist of glass-fiber cordage, coated with a suitable synthetic resin. 3.3.1 Uncoated material. The glass-fiber cordage, before coating, shall conform to form 2, class C, cordage number EC9-3-U of MIL-Y-1l40. 3.3.2 Coating. 3.3.3 Dimensions. Unless ot
22、herwise specified in the contract or order (see 6.2), the cordage shall be coated with a suitable synthetic resin composition, white in color. specified in 4.4.2.3. fied (see 6.2). specified for EC9-3-U cordage of MIGY-1140 (see 3.3.1). The diameter of the completed cord shall be 0.045 2 0.004 inch
23、when measured as The finished material shall be furnished in 1/2 pound spools unless otherwise speci- 3.3.4 Breaking strength. The breaking strength of the finished ccedage shall be not less than that 3.3.5 Flammability. 3.3.6 Blocking. 3.3.7 Coating durability. specified in 4.4.2.5. 3.3.8 Chemical
24、resistance. 3.4 T.me SR-5. 3.4.1 Uncoated material. 3.4.2 Coating. The flammability of the compound shall be as specified in 3.2.5. The cordage shall conform to the requirement specified in 3.2.6. The looped cords shall not break at less than 25 pounds when tested as The chemical resistance of the c
25、oating shall be as specified in 3.2.8. The material shall consist of a glass-fiber cordage coated with a suitable synthetic The glass-fiber cordage, before coating, shall conform to form 2, class C, resin. cordage number EC9-2-U of MIL-Y-1140. the following cdors, as specified (see 6.2), black, whit
26、e, red, green, or gray. specified in 4.3.2.3. specified (see 6.2). The cordage shall be coated with a suitable synthetic resin composition of one of 3.4.3 Dimensions. The diameter of the completed cord shall be 0.035 -+ 0.005 inch when measured as The finished material shall be furnished in 1/2 poun
27、d spools unless otherwise 3.4.4 Breakinp strength. The breaking strength of the finished cordage shall be not less than that specified for the untreated EC9-2-U cordage of MIL-Y-llI+O (see 3.4.1). 3.4.5 Flammability. 3.4.6 Blocking. 3.4.7 Coating durabilite. The flammability of the compound shall be
28、 as specified in 3.2.5. The cordage shall conform to requirement specified in 3.2.6. The looped cords shall not break at less than 10 pounds when tested as specified in 4.4.2.5. 3.4.8 Chemical resistance. 3.5 Workmanship. The chemical resistance of the coating shall be as specified in 3.2.8. Workman
29、ship shall be such as to meet all applicable requirements of this specifi- cation and any reference subsidiary specification or other document when inspected in accordance with 4.3. 4. QUALITY ASSURANCE FROVISIONS # 4.1 Responsibility for inspection. Unless otherwise specified in the contract or pur
30、chase order, the supplier is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or order, the supplier may use his own or any other facilities suit- able for the performance of the inspection requirements specified herein
31、, unless disapproved by the Government. fication where such inspections are deemed necessary to assure supplies and services conform to pre- s crib ed r equir ment s. The Government reserves the right to perform any of the inspections set forth in the speci- # 4.2 Sampling for quality conformance in
32、spection. 4.2.1 m. A lot shall consist of all material of the same form, type, width (type SR-1), and color offered for delivery at the same time. 4.2.2 Sampling for visual and dimensional examination. A sample of rolls or spools of insulation . material shall be selected from each lot offered for i
33、nspection in accordance with MILSTD-lo5 at in- spection level I, The Acceptable Quality Level shall be equal to 2.5 percent defective. t 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-3158D I Requirements SR-1 f paragraph 4.2.3 Sampling for
34、quality conformance tests. A sample of rolls or spools shallbe selected for each lot in accordance with the appendix to MIL-STD-105 at inspection level S-2, the smallest sample size to be used shall be two. sample roll or spool of tape, and 200 feet of cordage from each sample spool or roll of coraa
35、ge are re- quired for the tests of 4.3.2. jection of the lot. # For reduced inspection procedure R-lmay be used. Thirty-five feet of tape from each If any sample roll or spool fails any test this shall be cause for re- # 4.3 Quality conformance inspection. 4.3.1 Visual and dimensional examination. E
36、ach of the samples selected in accordance with 4.2.2 shall be visually and dimensionally examined to verify compliance with the requirements of this specifi- cation not invo1vir.g tests. Five yards of material shall be unrolled from each sample roll or spool for this examination. shall be rejected,
37、and if the number of defective rolls or spools in any sample exceeds the acceptance number for that sample, this shall be cause for rejection of the lot represented by the sample. Any roll or spool in the sample containing one or more visual Or dimensional defects 4.3.2 Ljuaiity conformance tests; T
38、he quality conformance tests shall be in accordance with table I. - . - .- Table I - Quality conformance tests. Inspection paragraph Inspection Requirements Inspection SR-4, SR-4.5 9 paragraph paragraph SR-4 SR-4.5 SR-5 SR-5 Breaking strength . Flammability , . Chemical resistance., , Flexibility. 4
39、.4.2-3 4.4.2 .i 4.4.2.2 4.4.2.6 4.4.2.4 4.4.1.2 3.2.5 3.1.7 4.4.1.5 3.2.8 3.1.6 4.4.1-3 4.4 Test methods. 4.4.1 m. 4.4.1.1 Breaking strength. The breaking stren$h shall be determined on a suitable typs of testing machine. rectangular strips if over 2 inches in width. be 3 inches, and the pulling jaw
40、s shall travel at a uniform rate of 11 to 13 inches per minute. average of five tests expressed in pounds per inch width shall be taken as the breaking strength. case of a break 20 percent or more below the general average, a second test shall be made, and this test ?hall be included in obtaining th
41、e final average. The specimens shall be tested in full section, if 2 inches or less in width, and in 2 inch The The initial length of the test specimens between jaws shall In the 4.4.1.2 Flammabilite. 4.4.1.2.1 Test equipment. Test equipment shall comprise the following: # (a) A test chamber 12 inch
42、es wide by 14 inches deep by 24 inches high, open at the top, and provided with means for supporting the test specimen in a vertical position by the use of a 1/2 pound weight clamped to the bottom of the specimen to keep it taut during the test. A Tirrell burner of a nominal base of 3/8 inch, a leng
43、th of approximately 4 inches above the primary air inlet, and mounted on a L5 degree angle block. In place of the pilot light attachment, the burner shall have a battery operated high voltage sparking device which instantaneously ignites the burner but does not interfere with the flame when gas is t
44、urned on at the proper preadjusted flame height and position with respect to the specimsn. with respect to the sample. a stopcock. (bf (c) (d) (e) (f) (9) A jig at the bottom of the test chamber to insure the correct location of the flame A supply of ordinary illuminating gas at service pressure wit
45、h the gas supply through A stopwatch that makes one revolution per minute. Strips of 3 mil bond paper 1/2 by 2 inches for use as flame indicators. A typewriter brush conforming to types 11111 or llTP1t of H-B-81. o Provided by IHSNot for ResaleNo reproduction or networking permitted without license
46、from IHS-,-,-i MIL-1-3158D 4.4.1.2.2 Test specimens. Five test specimens 12 by linch with a bench mark 2 inches from the bottom of each to indicate the point of flame application. 4.4.1.2.3 Test method. A piece of indicator paper shall be stapled to a tape test specimen P inches above the bench mark
47、. 1/2 inch on either side. The indicator paper is affixed in such a manner that it overlaps the test specimen 4.4.1.2.3.1 The test specimen shall be secured in the chamber. The flame shall be adjusted to a total length of 5 inches and an inner cone of 1-1/2 inches in a vertical position. electrical
48、ignition device connected, shall be placed in front of the sample so that the vertical plane through the burner inchdes he vertical axis of the test specimen, and so that there is a distance of 1-1/2 inches along the axis of the burner stem between the tip of the burner and the test specimen, which
49、shall be SO suspended that 2 inches thereof shall extend below the point of application of the flame. The flame shall be applied to the sample by opening the gas valve for 10 seconds, then closing it. extinguished tape shall be brushed with a typewriter brush to remove charred resin, and the length of the burned portion determined by subtracting the unburned length of tape from 10 inches. The indicator paper shall be examined for burning, charring, or other damage. The burner, with The 4.4.1.3 F1exL
