1、F - 2 MIL-C-85253 3.3 m 9999906 03611309 5 II - ,- MIL-C-85253(AS) 13 June 1981 MILITARY SPECIFICATION CORD, DETONATING This specification is approved for use by the Naval Air Systems Command, Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defen
2、se. 1. SCOPE. 1.1 Scope. This specification establishes the requirements for manu- facture and acceptance of a detonating cord, critical item, referred to herein as the cord. I 2. APPLICABLE DOCUMENTS. 2.1 Issues of documents. The following documents, of the issue in effect on date of invitation for
3、 bids or request for proposal, form a part of this specification to the extent specified herein. SPECIFICATIONS - MILITARY MIL-S-23586 MIL-B-85251 Sealing Compound, Electrical, Silicone Rubber, Accelerator Required. Bomb, Binary Chemical, BLU;80/B. Beneficial comments (recommendations additions, del
4、etions) and any pertinent data which may be of use in improving this document should be.addressed to: Commanding Officer, Naval Air Engineering Center, Engineering Specifications and Standards Department (ESSD) Code 93, Lakehurst, NJ 08733, by using the self-addressed Standardization Document Improv
5、ement Proposal (DD Form 1426) appearing at the end of this document or by letter. . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-85253 (AS) STANDARDS FEDERAL * FED-STD-102 MI LI TARY MIL-STD-109 MIL-STD-129 MIL-STD-453 MIL-STD-810 MIL-STD-11
6、68 MIL-STD-45662 PUBLICATIONS Naval Sea Systems Command (Code Ident 10001) WS-5003 - T I Preservation, Packaging, and Packing Levels. Quality Assurance- Terms and Definitions. Marking for Shipment and Storage. Radiographic Inspection. Environmental Test Methods. Ammunition Lot Numbering. b Calibrati
7、on System Requirements. HNS Explosive. (Copies of specifications, standards, drawings, and publications re- quired by contractors in connection with specified procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 2.2 Other publications. The
8、following documents form a part of this specif icgtion to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply. DEPARTMENT OF TRANSPORTATION . Code of Federal Regulations. 49 CFR 171-178. Transportation. (Appl
9、ication for copies should be addressed to the Superintendent of Documents, Government Printing Off ice, Washington, D. C. 20402. ) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-, a 3. REQUIREPENTS . 3.1 Item description. The cord is. an aluminum
10、sheath containing 2.50 +0.25, -0.00 grains per foot (gr/ft) of Hexanitrostilebene (HNS), Type II, Grade A explosive recrystallized from an approved organic solvent system. 3.2 Characteristics. 3.2.1 Performance. 3.2.1 1 Detonation velocity. The cord shall have a detonation velocity of not less than
11、6,000 meters per second. 3.2.1.2 Low temperature. The cord shall withstand a temperature of -62 degrees Celsius (OC) for 336 hours without degradation of performance. 3.2.1.3 High temprature. The cord shall withstand a temperature of +74OC for 336 hours without degradation of performance. 3.2.1.4 Im
12、Dact resistance. The cord. when mounted on a steel I plate, shall not detonate, deflagrate, or burn when impacted with a 20.0 k0.5 pound solid-steel ball dropped from a height of 30.0 +0.5, -0.0 inches. . 8 3.2.1.5 Thermal shock. The cord shall withstand alternate sequential. exposure to temperature
13、s of -48OC for 90 minutes, +75OC for 30 minutes, and +254OC for 5 minutes without degradation of performance, and shall not constitute a safety hazard after exposure to thermal shock. 3.2.1,6 Plinimm bend radius. The cord shall withstand being bent on a radius of 0.5 inch without visual signs of cra
14、cking or splitting of the metal sheath or degradation of performance. 3.2.1.7 High temperature (safety). The cord shall withstand alternate sequential exposure to temperatures of +99 k3OC for 2 hours, +280 k3OC for 5 minutes, and +225 k3OC for 20 minutes without detonating or con- stituting a safety
15、 hazard after the thermal exposure. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-B5253 13 E 7979906 0364112 5 W MIL-C-85253(AS) 3.3 Design and construction. 3.3.1 Materials, processes, and parts. The design and construction of the cord sha
16、ll be as follows. 3.3.1.1 Material. The materials used in the manufacture of the cord shall be as follows: a. Sheath: Seamless fine aluminum of 99.9 percent minimum pur i ty . 3.3.1.2 Dimensions. The cord outside diameter shall be not less than 0.073 inch nor greater than 0.076 inch, 3.3.1.3 Splicin
17、g. The cord shall be a continuous length, and shall be free of splices. 3.3.1.4 Core load. The cord core load shall be 2.50 +0.25, -0.00 gr/ft. 3.3.1.5 Explosive uniformity. The explosive core and metal sheath shall be continuous and shall be free from gaps, voids, inclusions, or impurities. 3.3.2 S
18、tandards of manufacture. When specified in the contract or purchase order (see 6.2.2), the contractor shall include written certi- fication accompanied by objective quality evidence as defined in MIL- STD-109, that the materials, processes, and parts used in the cord meet the requirements of Section
19、 3. 3.3.3 Identification and marking. Each piece of cord shall be legibly identified to the run from which the cord was cut. On its leading end, attach a tag or tape with the suppliers lot number, sublot number, and sequence number marked in permanent ink. Individual lengths shorter than as specifie
20、d herein shall be marked by sequence number which iden- tify the position of that sequence length within a sublot (see Figure 1). Example : Lot Sublot Sequential lengths ABC79A018-001A -11 0 6 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-8
21、5253 13 7997706 03blll13 7 MIL-C-85253 (AS 1 t t I -i i: a I a 8 ii P 4 c -7 t 8- I 3-L: _. s II_c 1 5 _. . . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-C-85253 13 W 7999906 03b4LLY 7 W 3.4 First article. Unless otherwise specified in the c
22、ontract or purchase order, the contractor shall furnish a preproduction sample consisting of one completed drawtube for first article ,inspection and approval (see 4.1.2.1 and 6.2.1). The preproduction sample shall be manufactured using the sam methods, materials, processes, and pro- cedures propose
23、d for production. the preproduction sample shall be totally at the risk of the contractor. Any changes in material, design, and processes, used after the manu- facture of the preproduction sample, may be cause for resubmission of a preproduction sample. Any production prior to acceptance of 3.4.11 R
24、etest. At the discretion of the procuring activity, prepru- duction tests, or a,ny portion thereof, shall be repeateti under any of the following conditions: a. b. C. d. e. When the manufacturer has modified the product (such as a change of raw materials , processes, production procedures, or method
25、s). Where there is evidence that the quality of the product has not been. maintained. This evidence may be in the form of accumulated product. failures, of system failures attribut- able to the product, or failure of the product to pass any of the tests for production lot acceptance that may be con-
26、 ducted by or for the procuring activity. When applicable documents have been amended or revised suf- ficiently so that continued validity of the previous prepro- duction testing is questionable. When the manufacturer has not produced cord to this speci- fication for a period of 12 months or longer.
27、 When manufacturer changes location at which the cord is produced. 3.5 Documentation. When specified in the contract or purchase order (see 6.2.2), inspection reports shall be prepared as specified in 4.1.2.5 and 4.2.4. 3.6 Workmanship. will ensure compliance with all requirements of this specificat
28、ion and the assembly drawing. gouges, dents, laps, seams, bends, kinks, or evidence of corrosion The device shall be fabricated in a manner that The cord shall be free from cracks, scratches, 3.6.1 Special working environments. Special working environments for the manufacture of the cord shall be as
29、 specified in MIL-B-85251. -. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-C-5253 13 7777906 03b4LL5 O 9 I MIL-C-85253 (AS) 4. QUALITY ASSUIIANCE PROVISIONS, 4.1 Responsibility for inspect_ion. Unless otherwise specified in the contract or
30、 purchase order, the contractor is responsible for the performance of all inspection requirements as specified herein (see 6.2.3). Except as otherwise specified in the contract or purchase order, the contractor may use his.own or any other facilities suitable or the performance of the inspection req
31、uire- ments specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in this specification where such inspections are deemed necessary to assure that supplies and services conform to prescribed requirements. 4.1.1 Clasgific
32、ation of inspections. The gxaminations and tests specified herein shall be classified as follows: a. Preproduction inspections (see 4.1.2.1). b, Quality conformance inspections (see 4.2). 4.1.2 Special tests and examinations. 4.1.2.1 Preproduction inspections. “he preproduction sample of one complet
33、ed drawhbe shall be subjected to the examinations and tests of Table I in the sequence shown. 4.1.2.2 Preproduction sample preparation. The preproduction sample of 3.4 shall undergo Group I examinations. SubsampleS, 160. - +1 inches in length, shall then be taken from the original leading and termin
34、al ends and from each 100 55 feet of the preproduction sample, however, no fiwer than 10 subsamples are required. Each subsample shall be assigned a unique number for identification and tagged in the same manner as a sublot. Each subsample shall be sectioned for testing as follows: a. Cut off 2.0 50
35、.1 inches from each end and discard. b. Cut off the succeeding 6.0 50.1 inches and reserve for core load tests (see 4.3.3). t c. Cut off the succeeding 24.0 20.1 inches and reserve for detonation velocity tests (see 4.3.4). I- 7. Provided by IHSNot for ResaleNo reproduction or networking permitted w
36、ithout license from IHS-,-,-MIL-C-85253 13 Ob 03bLlLLb 2 I) d. e. f. g. h. i. Cut off the succeeding 24.0 20.1 inches and reserve for the low-temperature test (see 4.3.5). Cut off the succeeding 24.0 k0.1 inches and reserve for high-temperature tests (see 4.3.6) Cut: off the succeeding 24.0 20.1 inc
37、hes and reserve for the thermal-shock test (see 4.3.8). Cut off the succeeding 24.0 20.1 inches and reserve for the minimum bend-radius tests (see 4.3.9). Cut off the Succeeding 6.0 kO.1 inches and reserve for the impact-resistance test (see 4.3.7). Reserve the remaining for high-temperature (safety
38、) test (see 4.3 .li). . TABLE I. Premoduction insDections. I 1 Reqhrement Examination or test paragraph Grow I , Visual and mechanical 3.3.1.1, 3.3.1.2, : 3.3.1.3, 3.3.2, 3.3.3, 3.6 Radiographic inspection 3.3.1.5 Group- II Core load 3.3.1.4, 3.3.1.5 Detonation velocity Minimum bend radius, Impact r
39、es is tance Group III High temperature Low temperature Thermal shock High temperature (safety) 3.2.1.1 3.2.1.6 3.2.1.4 3.2.1.3 3.2.1.2 3.2.1.5 I 3.2.1.7 ! .i Method. par ag r aph 4.3.2 * 4.3.10 4.3.3 4.3.4 4.3.9 4.3.7 4.3.6 4.3.5 4.3.8 4.3 .ll 8 Provided by IHSNot for ResaleNo reproduction or networ
40、king permitted without license from IHS-,-,-MIL-C-85253 (AS) 4.1.2.3 Acceptance criteria. Failure of one or more cords in the preproduction sample to pass any of the preproduction tests shall cause rejection of the preproduction sample. 4.1.2.4 Disposition of preproduction sample, If results of the
41、pre- production sample tests of Table I are acceptable, unused portions of the preproduction sample cord may be marked for use in hardware appli- cations upon receipt of written approval from the procuring activity (see 6.2.1). 4.1.2.5 Preproduction inspection report. When specified in the con- trac
42、t or purchase order (see 6.2.2), results of the preproduction inspec- tions shall be prepared for the procuring activity. contain the following,information, including a certification which attests that the information provided is correct and applicable to the product being submitted: The report shal
43、l a. b. C. d. e. f. A statement that the preproduction sample complies with allquality assurance provisions of this specificaton for the cord specified in the contract or purchase order. Number of units of product inspected. Results obtained for all inspections performed, including copies of raw dat
44、a for core load and detonation velocity measurements. Contract or purchase order number and date, together with an identification and date of changes. Certificates of compliance of all material procured directly by the contractor. Date submitted. The certification shall be signed by a responsible ag
45、ent of the certify- evidence of the agents authority to bind his principal. Substantiation of the agents authority will not be required with subsequent certifca- tions unless, during the course of the contract, this authority is vested in another agent af the certifying Organization. ing organizatio
46、n. The initial certification shall be substantiated by 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-C-85253 13 M 777770b 03611118 6 -_ MIL-C-85253 (AS) 4,2 Qualitv conformance insDections. Each inspection lot of cord submitted for acceptan
47、ce shall be subjected to the ex- aminations and tests specified in Table II, in the sequence shown. TABLE II. Quality conformance inst,ections. Examination or test Grout, I Certification Group II (100%) Visual examination Radiographic inspection GrouD III.(sample) Core load Detonation velocity Minim
48、um bend radius Requirement paragraph 3.3.2 * 3,3.1.1, 3.3,1.2 3.3.1.3, 3.3.2 3.3.2, 3.3.3, 3.6 3,3.1,5 3,3 J.4, 3.3 A5 3.2.1.1 . 3.2.1.6 Method paragraph 4.3.2 4.3.10 4.3.3 4.3.4 4.3.9 4.2.1 m. A lot shall not exceed that quantity of cord pro- duced in one continuous process using-a single lot of HN
49、S, Type II, Grade A explosive recrystallized from an approved organic solvent system, and a single lot of sheathing material. Homoge- neity shall be considered to exist provided the lot has been pro- duced by one manufacturer, in one unchanged process, in accord- ance with this specification, 4.2.1.1 Sublot. A sublot shall consist of one length of draw tube o
