NAVY MIL-C-24404-1971 CONNECTION BOXES 15 FEET SUBMERSIBLE FOR DEGAUSSING CABLES (NAVAL SHIPBOARD USE) GENERAL SPECIFICATION FOR《消磁电缆(军舰用)15英尺潜水连接盒一般规范》.pdf

1、MIL-C-ZYY04 10 H 979770b 0304298 9 -1 -t This document has been approved for public release and sale; distribution is unlimited. 1 September 1971 (See 6.5) MILITARY SPECIFICATION CONNECTION BOXES, 15 FEET SUBMERSIBLE, FOR DEGAUSSING CABLES (NAVAL SHIPBOARD USE) GENERAL SPECIFICAION FOR 1. SCOPE 1.1

2、Scope. This specification covers the requirements for watertight connection Connection boxes shall be of the watertight type and of the boxes for degaussing cables for use on Naval ships. sizes as specified in table I and in the individual detail specification sheet (see 6.2). Symbol numbers refer t

3、o the complete connection box assembly. Table I - Connection box sizes. 1.2 Classification. I 1 1 480.6 I 20 75,000 to 200,000 480.7 12 157,000 to 413,000 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issFe in effect on date of invitation for bids or request for proposal, form a part of

4、 the specification to the extent specified herein. SPECIFICATIONS FEDERAL QQ-S-698 - Steel, Sheet and Strip, Low-Carbon. TT-E-489 - Enamel, Alkyd, Gloss (For Exterior and Interior Surfaces). MILITARY MIL-R-900 - Rubber Gasket Material, 45 Durometer Hardness, For Woderately Low Temperature Service. M

5、IL-S-901 - Shock Tests, H. I. (High-Impact); Shipboard Machinery, Equipment and Systems, .Requirements For. MIL-E-917 - Electric Power Equipment, Basic Requirements (Naval Shipboard Use). MIL-P-15024 - Plates, Tags and Bands for Identifcati7n of Iqi?,nic.?t. MIL-P-15024/5 - Plates, Identification. M

6、IL-P-15037 - Plastic Sheet, Laminated, Thermosetting, Glass-Cloth, Melamine-Resin. MIL-1-45208 - Inspection System Requirements. FSC 1075 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-24LI04 LO W 977970b 0304277 O M MIL-C-24404 (SHIPS) STANDA

7、RDS MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes. MIL-STD-O - Definitions of and Basic Requirements for EnClOsUres for MIL-STD-167 - Mechanical Vibrations of Shipboard Cquipment. MIL-STD-O - Test Methods for Electronic and Electrical Component Parts. MIL-STD-278

8、 - Fabrication Welding and Inspection; an2 Casting Inspection Electric and Electronic Equipment. and Repair for Machinery, Piping and Pressure Vessels in Ships of the United States Navy. See Supplement-1 for list of applicable specification sheets. (Copies of specifications, standards, drawings and

9、publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) to the extzp-in. of invitation for bids or request for proposal shall apply. 2.2 Other ublications. The following documents

10、form a part of this specification Unless otherwise indicated, the issue in effect on date NATIONAL FIRE PROTECTION ASSOCIATION (NFPA) No. 70 - National Electric Code. (Application for copies should be addressed to National Fire Protection Association, 60 Batterymarch Street , Boston , Massachusetts

11、02110. ) NATIONAL BUREAU OF STANDARDS Handbook H28 - Screw Thread Standards for Federal Services. (Application for copies should be addressed to the Superintendent of Documents, Govern- nEnt Printing Office, Washington, D.C. 20402.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) B21 - Naval Brass

12、 Rod, Bar, anci Shapes. B98 - Copper-Silicon Alloy Rod, Bar and Shapes. B140 - Leaded Red Brass (Hardware Bronze) Rod, Bar, and Shapes. B159 - Phosphor Bronze Wire. (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, Pa. 1910

13、3.) AMERICAN IRON AND STEEL INSTIUTUE (AISI) Steel Products Manual. (Application for copies should be addressed to the American Iron and Steel Institute, 350 Fifth Avenue, New York, N.Y. 10017.) UNIFORM CLASSIFICATION COPIMITTEE Uniform Freight Classification Rules. (Application for copies should be

14、 addressed to the Uniform Classification Committee, (Technical society and technical association specifications and standards are generally 202 Union Station, 516 West Jackson Boulevard, Chicago, Illinois 60606.) available for reference from libraries. and using Federal agencies.) They are also dist

15、ributed among technical groups 3. REQUIREMENTS 3.1 First article sample. 3.2 Detail specification sheer . Prior to beginning production a sample of each size uner contract or order shall be inspected as specified in 4.2 (see 6.4). as specifiedreh and in accordance with the applicable detail specific

16、ation sheets. In the event of any conflict between requirements of this specification and the detail speci- fication sheets, the latter shall govern. The individual connection box requirements shall be 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-

17、,-NIL-C-24404 10 E 9999906 0304300 3 MIL-C-24 4 04 (SHIPS) 3.3 Materials. Materials used in the manufacture of connection boxes shall be as specified herein or in the applicable detail specification sheet. When a definite material is not specified, the manufacturer shall use a good quality commercia

18、l grade Iraterial which is suitable for the intended use. 3.3.1 Metals. 3.3.1.1 Dissimilar metals. When dissimilar metais are used in intimate contact with each other, protection against electrolysis and corrosion shall be provided. or metal spraying of dissimilar base metals to provide similar or s

19、uitable abutting surfaces are acceptable methods for the alleviation of electrolytic erosion. method, a manufacturer shall obtain the approval of the procuring activity. metals are defined in MIL-E-917. Metal plating Before using any other Dissimilar 3.3.1.2 Enclosures. The enclosures shall be fabri

20、cated of low carbon steel conforming to QQ-S-698 (or alternate materials as approved by the Naval Ship Engineering Center (NAVSEC) or agency concerned for specific applications.) 3.3.2 Rubber compounds. Rubber compounds and compositions shall be in accordance with MIL-R-SUO. 3.3.3 Stud terminals. St

21、ud terminals shall conform to the following: Hardware bronze, hexagonal in accordance with ASTM B140, alloy (a) %; half hard. (b) E. Silicon copper, hexagonal in accordance with ASTM B98, alloy 655 or 661 hard. (c) Pressure bar. Naval brass in accordance with ASTM B21, alloy 464, hard. (d) Pin. Corr

22、osion resistant steel, AIS1 type 316. 3.4 Design and construction. The connection boxes shall conform to the design and construction specmed on the detail specification sheets. details, and materials specified herein and on the applicable detail specification sheet shall be permitted, unless approve

23、d by NAVSEC or the procuring agency. 3.4.1 Small miscellaneous hardware. All miscellaneous hardware, such as screws, bolts, nuts and washers shall be of a good commercial grade, suitably protected against corrosion. Self tapping screws or other self tapping devices shall not be used in the assembly

24、of components. when specified on the applicable detail specification sheets the components shall be as shown on figures 1 through 15. No deviation in essential 3.4.2 Threads. Threads shall be rignt hand class 2 in accordance with Handbook H28. 3.4.2.1 Engagement of threaded parts. All threaded parts

25、 shall engage sufficiently to enable the connection boxes and interior components to withstand the tests specified in 4.5.4 and 4.5.5, however the minimum engagement shall be three full threads. 3.4.3 Drillin Drilling, countersinking and tapping shall be done +I be ore 3.4.4 Sharp ed es. All sharp e

26、dges that are accessible shall be given a slight radius and made sm one stud shall be instal- led in an unsymmetrical arrangement to provide for cover polarization. 3.4.7 Stud terminals. Stud terminals shall be as shown on figure 15 and on the individual detail specification sheet. 3.5 Watertight en

27、closures. 3.5.1 Gaskets. Gaskets shall be 1/2 inch square. Gaskets for enclosures with square corners shall be made in four pieces. Long dbmension pieces shall be installe first an shall fit tightly throughout the groove and at the ends. Short dimension pieces shall ther. be fitted to butt tightly a

28、gainst the free ends of the long pieces. Gasket joints shall be Mde tight with rubber cement. Gaskets shall not be cemented along the grooves. Gaskets for connection boxes with optional round corners shall be made in one piece. Before ship- mt, gaskets shall be relieved of pressure. 3 Provided by IH

29、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-2 4 40 4 (SHIPS ) the manufactureto= wdspeclrfied (cee 6.2). without any distortion of the connection box. the detail specification sheet. Cable entrance holes (stuffing tubes) shall be plugged, by the manufact

30、urer of the enclosure by a suitable rubber plug and compressed by the gland or cap to provide a water-vaporproof seal. 3.5.2 Holes for stuffin tubes box connectors. Holes shall be cut or drilled by These holes shall be smooth and true 3.5.3 Stuffing tubes or box connectors shall be furnished only wh

31、en so specified in 3.5.4 Weldinq, brazin and similar rocesses. Welding, brazing and similar processes 3.5.4.1 All steel parts of connection box and cover shall be assembled by welding as used in the manufacture _r_q o connection boxes + s all be in accordance with MIL-STD-278. specified herein or on

32、 detail specification sheets and shall be positioned by jig while welding to insure proper alignment. matic control of current, timing, and pressure to insure proper uniformity of the operation. treated orheattreated to prevent deterioration or failure due to stresses or other conditions resulting f

33、rom working, forming, welding and similar processes, during the fabrication process. unit in 1/4 inch letters with ink of a grade similar or equal to Clear Print Opaque, manufactured by Phillips Process Co., Inc., Rochester, New York. 3.5.4.2 All projection and spot welding shall be performed by mac

34、hines having auto- 3.6 Stress relief. All metals used in the manufacture and assembly shall be suitably 3.6.1 The words “stress relieved“ shall be on the outside bottom of each complete 3.7 Electrical details. 3.7.1 Clearances and cree a e. Minimum electrical creepage and clearances shall be as requ

35、ired by NFPA No.70. + T ese clearances are applicable to machined laminated plastic bases or components. Clearances applicable to molded bases or supports shall conform to the requirements Of MIL-E-917 providing mold finishes are not disturbed. Terminal strip material shall be a glass cloth bonded w

36、ith melamine resin type GME, in accordance with MIL-P-15037. No other laminated plastic material shall be used for electrical insulation. 3.7.2 Terminal strips. 3.8 Performance requirements. 3.8.1 Dielectric strength. Connection boxes shall withstand the dielectric strength test specified in 4.5.1.

37、ance test specified in 4.5.2. 3.8.2 Insulation resistance. Connection boxes shall withstand the insulation resist- 3.8.3 Temperature rice. Connection boxes shall withstand the temperature rise test specified in 4.5.3. 3.8.3 Shock. Connection boxes shall withstand the shock test specified in 4.5.4. 3

38、.8.5 Vibration. Connection boxes shall withstand the vibration test specified in 4.5.5. - 3.8.6 Salt spray. Connection boxes shall withstand the salt spray test specifieci in 4.5.6. 3.8.7 Effectiveness of enclosure tightness. Connection .boxes shall withstand the effectiveness of enclosure tightness

39、 inspection specified in 4.5.7. 3.9 Identification lates. Plates for identification shall be engraved in accordance with type B of MIL-P-1502 + and MIL-P-15024/5. Material for these plates shall be brass. 3.10 Manufacturers markin Manufacturers marking shall appear on the exterior of cover or identi

40、fication pldis marking shall be either initials or monogram, and shall be depressed or embossed in the metal to provide permanent identification. This identifi- cation shall be that of the prime manufacturer responsible for the final acceptance of the equipment. If the manufacturer makes only the en

41、closure, his identification marking shall be on the interior of the cover. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-24404 LO m 9979706 0304302 7 m MIL-C-24 4 04 (SHIPS) 3.11 Cleaninp. Connection boxes shall be furnished thoroughly clea

42、ned of all soler- ing flux and other corrosive agents. Cleaning agent shall be neutralized after cleaning. Cleaning shall be in accordance with FIIL-E-9 17. 3.12 Paintin . Painting shall be in accordance with MIL-E-917 except that the interior of + t e enclosure, excluding cover, shall be painted wh

43、ite using enamel in accord- ance with TT-E-489. 3.13 Drawings. Drawings shall consist of manufacturers drawings, certified by tne cognizant Defense Contract.Administration Service Office (DCASO) as complying with the re- quirements of this specification. The certification shall be documented on the

44、drawing as a matter of record. Drawings shall carry manufacturers numbers and the number of this specification. (Formal approval and validating signatures for manufacturers drawings will not be required nor will NAVSHIPS drawing numbers be assigned,) 3.13.1 Manufacturers drawings shall be furnished

45、and shall include the following: (a) Outline, not necessarily to scale, of the front, side, cross sectional, and top views of the boxes, giving dimensions and other essential details. In the interest of clarity, views in addition to those required may be shown. (b) List of material. (c) Descriptive

46、data of the equipment, which shall include the degree of enclosure. (d) Weight of the equipment and mounting dimensions. (e) A list of notes and references pertinent to the basic design of the equipment. (f) A list of notes pertinent to the tests conducted in accordance with this (9) Title block. sp

47、ecification. 3.13.2 Drawin distribution. The manufacturer, upon being advised that,his first article samp1ducce.ssful.ly passed the inspection of 4.2 and has been found Satisfactory -for use, shall immediately place on record a set of prints of the drawing used for manufact- nring the parts with the

48、 following: (a) One set for file with the DCAS. (b) One set for file with NAVSEC, Department of the Navy, Hyattsville, (c) One set for file with the Contracting Officer, Ships Parts Control Center, (d) One set for file with the Commander, Defense General Supply Center, Maryland 20782. Mechanicsburg,

49、 Pennsylvania, 17055. Richmond, Virginia 23212. 3.14 Workmanship. Workmanship shall be first class in every respect. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the supplsy 1s responsible for the performance of all inspection require- ments as specified herein. Except as otherwise specified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the in