1、 MIL-DTL-22931D 15 April 2013 SUPERSEDING MIL-DTL-22931C 21 November 2003 DETAIL SPECIFICATION CABLES, RADIO FREQUENCY, SEMIRIGID, COAXIAL, SEMI-AIR-DIELECTRIC, GENERAL SPECIFICATION FOR This specification is approved for use by all Departments and Agencies of the Department of Defense 1. SCOPE 1.1
2、Scope. This specification covers semi-air-dielectric, coaxial, semirigid radio frequency cables with smooth, corrugated, or braided outer conductors with outside diameters ranging from .500 to 3.125 inches, with an impedance of 50 or 75 ohms (see 3.1). The operating temperature ranges are -55C to +8
3、0C or -55C to +200C, as specified (see 3.1), and the storage temperature capability is -65C. 1.2 Part or Identifying Number (PIN). The PIN consists of the letter “M” followed by the specification number, the associated slash sheet number and the sequentially assigned dash number. M22931 /01 - 001 (S
4、equentially assigned dash number) (Applicable slash sheet number) (Specification number) AMSC N/A FSC 6145 INCH-POUND Comments, suggestions, or questions on this document should be addressed to DLA Land and Maritime, Columbus, ATTN: VAI, P.O. Box 3990 East Broad Street, Columbus, Ohio 43216-5000 or
5、email to RFConnectordla.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-2293
6、1D 2 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effor
7、t has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards and handbooks.
8、The following specifications, standards and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. FEDERAL STANDARD FED-STD-228 Cable and Wire, Insulated, Method of Testing. COM
9、MERCIAL ITEM DISCRIPTION A-A-59551 - Wire, Electrical, Copper (Un-insulated). DEPARTMENT OF DEFENSE SPECIFICATION MIL-R-39016/32 - Relays, Electromagnetic, DPDT, Low Level to 2 Amperes (Latching). DEPARTMENT OF DEFENSE STANDARDS MIL-STD-130 - Identification Marking of U. S. Military Property. MIL-ST
10、D-202 - Test Methods for Electronics and Electrical Component Parts. MIL-STD-1285 - Marking of Electrical and Electronic Parts. (See supplement 1 for list of specification sheets.) (Copies of these documents are available online at https:/assist.dla.mil/ or from the Standardization Document Order De
11、sk, 700 Robbins Avenue, Building 4D,Philadelphia, PA 19111-5094.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. ASTM INTE
12、RNATIONAL ASTM B152/B152M - Copper Sheet, Strip, Plate, and Rolled Bar. ASTM B188 - Standard Specification for Seamless Copper Bus Pipe and Tube. ASTM B209 - Standard Specification for Aluminum-Alloy Sheet and Plate. ASTM B210 - Standard Specification for Aluminum-Alloy Drawn Seamless Tubes. ASTM B2
13、21 - Standard Specification for Aluminum-Alloy Extruded Bars, Rods, Shapes, and Tubes. ASTM B234 - Standard Specification for Aluminum-Alloy Drawn Seamless Tubes for Condensers and Heat Exchangers. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-
14、DTL-22931D 3 ASTM D150 - Loss Characteristics (AC) and Permittivity (Dielectric Constant) of Solid Electrical Insulation. ASTM D648 - Plastics, Deflection Temperature of, Under Flexural Load in the Edgewise Position. ASTM D1248 - Polyethylene Plastics Extrusion Materials for Wire and Cable. (Copies
15、of these documents are available from www.astm.org or ASTM International, 100 Barr Harbor Drive, Conshohocken, PA 19428-2959.) NATIONAL CONFERENCE OF STANDARDS LABORATORIES (NCSL) NCSL-Z540.3 - Calibration Laboratories and Measuring and Test Equipment. (Copies are available online at http:/www.ncsli
16、.org/ or from National Conference of Standards Laboratories NCSL, 2995 Wilderness Place Suite 107, Boulder, Colorado 80301-5405.) 2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein (except for related specification sheets), the text
17、of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Specification sheets. The individual item requirements shall be as specified herein and in accordance with the applicabl
18、e specification sheets. In the event of any conflict between the requirements of this specification and the specification sheet, the latter shall govern. 3.2 Materials. The materials used in the construction of the cable shall be as specified herein. However, when a definite material is not specifie
19、d, a material shall be used which will enable the cable to meet the performance requirements of this specification. Acceptance or approval of any constituent material shall not be construed as a guaranty of the acceptance of the finished product. 3.2.1 Inner conductor. The inner conductor shall be s
20、olid or tubular as specified (see 3.1) and shall be in accordance with 3.2.1.1, 3.2.1.2, or 3.2.1.3. 3.2.1.1 Solid. Solid conductors shall be wire conforming to A-A-59551. 3.2.1.2 Tubular. Tubular conductors shall conform to the requirements of ASTM B188. 3.2.1.3 Tubular, with seam or weld. Tubular
21、conductors, with seam or weld, shall be manufactured from copper strip that conforms to ASTM B152/B152M. 3.2.1.4 Joints. There shall be no joints in solid conductors made subsequent to the last drawing operation. Joints in the inner conductors shall be brazed or silver soldered using a nonacid flux,
22、 so that the diameter shall not be increased and there shall be no lumps or sharp projections. 3.2.2 Dielectrics. The dielectrics used in the construction of cables shall be as specified for each specified application (see 3.1), and shall be in accordance with 3.2.2.1, 3.2.2.2 or 3.2.2.3. 3.2.2.1 Po
23、lyethylene. Polyethylene shall be in accordance with ASTM D1248. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-22931D 4 3.2.2.2 Polystyrene. Polystyrene tapes shall be made from biaxially oriented sheets of pure polystyrene, free from color
24、ants or lubricants. In addition, the polystyrene shall have a minimum heat distortion temperature of 92C, measured in accordance with ASTM D648; a dielectric constant of 2.5 at 1 x 106hertz (Hz); and a dissipation factor of 0.0003 maximum at 1 x 106Hz, both measured in accordance with ASTM D150. 3.2
25、.2.3 TFE fluorocarbon. TFE fluorocarbon shall be polytetrafluoroethylene. The dielectric constant and dissipation factor (tangent of loss angle) shall not exceed 2.1 and 0.0003, respectively, when measured in accordance with ASTM D150. 3.2.2.4 Polypropylene. Polypropylene shall be acceptable, provid
26、ed the manufacturer certifies the loss factor does not exceed 0.0012. 3.2.3 Outer conductors. The outer conductor (or shield) of the cable shall be braided, smooth, or corrugated metal tube, as specified (see 3.1), and shall be in accordance with 3.2.3.1 to 3.2.3.2.2. The conductor may be formed in
27、any manner, provided the requirements of this specification are met. 3.2.3.1 Braid. The individual strands of the braid shall conform to A-A-59551. 3.2.3.2 Tubes and strips. 3.2.3.2.1 Aluminum. Aluminum tubes shall conform to the requirements of ASTM B210, ASTM B234 or ASTM B221, as applicable. Alum
28、inum strips may be used to form tubes provided they meet the requirements of ASTM B209. 3.2.3.2.2 Copper. Copper tubes shall conform to the requirements of ASTM B188. Copper strips shall conform to the requirements of ASTM B152/B152M. 3.2.4 Jacket (when applicable). The jacket shall consist of a con
29、tinuous sheet of polyethylene conforming to type I or II, class C of ASTM D1248. 3.2.4.1 Thickness. The minimum wall thickness of the jacket at any point shall be as specified (see 3.1). 3.3 Dimensions. The dimensions of the cables shall be as specified (see 3.1). 3.4 Electrical performance. 3.4.1 C
30、ontinuity. When cables are tested as specified in 4.5.2, each conductor in each reel of cable shall be continuous. 3.4.2 Voltage withstand. When cables are tested as specified in 4.5.3, the completed cable shall withstand the potential specified (see 3.1) without breakdown. 3.4.3 Insulation defects,
31、 spark (when applicable, see 3.1). When cables with jackets are tested as specified in 4.5.4, the jacket shall be continuous without cracks, breaks or holes. 3.4.4 Insulation resistance. When cables are tested as specified in 4.5.5, the insulation resistance per 1,000 feet shall be not less than 100
32、,000 megohms. 3.4.5 Attenuation. When cables are tested as specified in 4.5.6, the attenuation shall be as specified (see 3.1). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-22931D 5 3.4.6 Velocity. When cables are tested as specified in 4.
33、5.7, the velocity shall be as specified (see 3.1). 3.4.7 Capacitance. When cables are tested as specified in 4.5.8, the capacitance shall be as specified (see 3.1). 3.4.8 Impedance. When cables are tested as specified in 4.5.9, the impedance shall be as specified (see 3.1). 3.4.9 Voltage standing wa
34、ve ratio (VSWR). When cables are tested in accordance with 4.5.10, the VSWR of the sample unit shall not exceed the value specified (see 3.1) as the initial VSWR. The connectors shall be included as part of the cable, and shall comply with the requirements specified herein. 3.5 Environmental. 3.5.1
35、Pressure tightness (when applicable, see 3.1). When tested as specified in 4.5.11, cables with smooth or corrugated outer conductors shall be capable of retaining the internal pressure specified (see 3.1), with a pressure drop of not more than 1 pound per square inch gage (psig) over a period of 24
36、hours. 3.5.2 Cold bend (when applicable, see 3.1). When specified, jacketed cable shall be tested as specified in 4.5.12, and there shall be no evidence of cracking or splitting of the cable jacket. 3.5.3 Bending (when applicable, see 3.1). When specified, finished cables shall be tested in accordan
37、ce with 4.5.13. Following the test, the cable shall meet the requirements of 3.4.9 and 3.5.2. When the alternate procedure is used, there shall be no evidence of kinking, wrinkling or cracking. 3.5.4 Temperature cycling (when applicable, see 3.1). When specified, cables shall be tested as specified
38、in 4.5.14. There shall be no evidence of mechanical damage, and the capacitance and VSWR shall be as specified (see 3.1). 3.5.5 Thermal shock (when applicable, see 3.1). When specified, cables shall be tested as specified in 4.5.15. There shall be no flaring of any layer, and unless otherwise specif
39、ied (see 3.1), the measurements following exposure shall not vary from the original measurement by more than the following: Core - .125 inch (3.18 mm) Insulating layer - .375 inch (9.53 mm) Outer conductor - .125 inch (3.18 mm) Outer jacket - .750 inch (19.05 mm) 3.5.6 Vibration, high frequency (whe
40、n applicable, see 3.1). When specified, cables shall be tested as specified in 4.5.16. There shall be no conductor discontinuity nor evidence of damage. 3.5.7 Shock (when applicable, see 3.1). When specified, cables shall be tested as specified in 4.5.17. There shall be no conductor discontinuity no
41、r evidence of damage. 3.6 Marking. The cables shall be marked in accordance with MIL-STD-130 with the complete PIN, the manufacturers code symbol, and the manufacturers name, at least every 2 feet. The manufacturers code symbol shall be in accordance with MIL-STD-1285. Marking shall not permanently
42、indent, deform, or otherwise damage the jacket or outer conductor. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-22931D 6 3.7 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable m
43、aterials should be used to the maximum extent possible provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.8 Workmanship. Cables shall be processed in such a manner as to be uniform in quality and shall
44、be free from any burrs, die marks, chatter marks, foreign material, and other defects that will affect life, serviceability, or appearance. 4. VERIFICATION 4.1 Classification of inspection. The inspections specified herein are classified as follows: a. Materials inspection (see 4.2). b. Conformance
45、inspection (see 4.4). 4.2 Materials inspection. Materials inspection shall consist of certification supported by verifying data that the materials listed in table I, used in fabricating the cables, are in accordance with the applicable referenced specification or requirements prior to such fabricati
46、on. TABLE I. Materials inspection. 4.3 Inspection conditions. Unless otherwise specified herein, all inspections shall be performed in accordance with the test conditions specified in the “GENERAL REQUIREMENTS” of MIL-STD-202. 4.4 Conformance inspection. 4.4.1 Inspection of product for delivery. Ins
47、pection of product for delivery shall consist of groups A and B inspections. Except as specified in 4.4.2.1.5, delivery of products which have passed groups A and B inspections shall not be delayed pending results of the group C inspection. 4.4.1.1 Inspection lot. An inspection lot shall consist of
48、all cable covered by a single specification sheet, produced under essentially the same conditions, and offered for inspection at the same time. 4.4.1.2 Group A inspection. Group A inspection shall consist of the examinations and tests specified in table II, in the order shown. TABLE II. Group A insp
49、ection. Examination or test Requirement paragraph Test paragraph Sampling plan Material Requirement paragraph Applicable specification Wire and braid Copper Polyethylene Polystyrene TFE fluorocarbon Aluminum 3.2.1.1, 3.2.3.1 3.2.1.3, 3.2.3.2.2 3.2.2.1, 3.2.4 3.2.2.2 3.2.2.3 3.2.3.2.1 A-A-59551 ASTM B152, ASTM B188 ASTM D1248, L-P-390 ASTM D150, D648 ASTM D150 ASTM B209, B210, B221, B234 Provided by IHSNot for ResaleNo
