1、 INCH-POUND MIL-DTL-82889A (OS) 25 March 2004 SUPERSEDING MIL-DTL-82889 (OS) 22 August 1996 DETAIL SPECIFICATION DETONATING CORD ASSEMBLY (DCA) This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Departments and Agencies of
2、 the Departments of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements for two types of detonating cord assemblies (see 6.1). 1.2 Classification. Detonating cord assemblies will be of the following types, as specified (see 6.2): Type I Standard TLX line. This line has a high exp
3、losive fitting on each end. Type II Referred to as “High flexure TLX line”. It is the same as a standard TLX line, except the outer surface of the assembly, between then end fittings, is covered with a protective layer of material to prevent chaffing during flexure. 2. APPLICABLE DOCUMENTS 2.1 Gener
4、al. 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 effort has been made to ensure the completen
5、ess of this list, document users are cautioned that they must meet all specified requirements of 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. The following specifications, standa
6、rds, 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. SPECIFICATIONS Comments, suggestions, or questions on this document should be addressed to Commander, Indian Head
7、 Division, Naval Surface Warfare Center, Technical Information Branch (Code 4230), 101 Strauss Avenue, Indian Head, Maryland 20640-5035, or emailed to pennlfih.navy.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online data
8、base at www.dodssp.daps.mil. AMSC N/A FSC 1377 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-82889A (OS) 2 FEDERAL A-A-59281 Cleaning Compound, Solvent Mixtur
9、es DEPARTMENT OF DEFENSE MIL-I-8500 Interchangeability and Replaceability of Component Parts for Aerospace Vehicles MIL-L-14758 Lead Azide (Special Purpose) (For Use in Ammunition) MIL-PRF-46010 Lubricant, Solid Film, Heat Cured, Corrosion Inhibiting MIL-C-83125 Cartridge for Cartridge Actuated/Prop
10、ellant Actuated Devices, General Design Specification for STANDARDS Department of Defense MIL-STD-810 Environmental Engineering Considerations and Laboratory Tests MIL-STD-1168 Ammunition Lot Numbering and Ammunition Data Card DOD-STD-2101 Classification of Characteristics (Copies of these documents
11、 are available online at http:/assist.daps.dla.mil/quicksearch/ or www.dodssp.daps.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other Government documents, drawings, and publications. The following other Government document
12、s, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation or contract. SPECIFICATIONS Naval Sea Systems Command (Code Ident 53711) WS 5003 Hexanitrostilbene (HNS), Explosive DRAWINGS Naval Air
13、 Systems Command (Code 30003) 841AS801 Fitting, Sensitivity Test 841AS802 Connector, Tee 841AS803 Block, Dent 841AS804 Holder, Dent Block 850AS875 RAU-2/A Detonating Cord As sembly Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-82889A (OS) 3
14、 (Application for copies should be addressed to: Commander, Indian Head Division, Naval Surface Warfare Center, Attn: Technical Information Branch (Code 4230), Indian Head, MD 20640-5035.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified h
15、erein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. American Society for Testing and Materials (ASTM) ASTM B 117 Standard Practice for Operating Salt Spray (Fog) Apparatus ASTM E 748 Standard Practices for Thermal Neutron Radiography of M
16、aterials ASTM D 1141 Standard Practices for the Preparation of Substitute Ocean Water ASTM E 1742 Standard Practices for Radiographic Examination (Copies of this document are available online at http:/www.astm.org/cgi-bin/SoftCart.exe/STORE/standardsearch.shtml?L+mystore+afpt6301+1062008944 or from
17、the American Society for Testing and Materials Customer Service, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.) 2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in thi
18、s document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified in the contract or purchase order, a sample shall be subjected to first article inspection (see 4.3, 4.6, and 6.3). 3.2 Conformance to docu
19、ments. All materials used in the manufacture of the DCA shall conform with the specifications referenced unless specific approval in writing covering a departure therefrom has been obtained from the Naval cognizant field activity for DCAs prior to manufacture. TLX design and construction shall be id
20、entical to that approved for service use by the Navy. Any design changes affecting the interchangeability or performance of these items shall be subject to approval by the cognizant governmental design activity. 3.3 Primary components. For the purpose of this specification, the thin layer explosive
21、(HMX and Aluminum), the booster tip explosive (HNS, WS5003), and transfer charge (Lead Azide, MIL-L-14758) are considered primary components. 3.4 Design and construction. The design and construction of the DCAs shall meet all requirements of this specification with special effort to ensure inherent
22、reliability so that the equipment will consistently perform as specified. The requirements of MIL-C-83125 shall apply as requirements of this specification for manufacturing, testing, and procurement with the exceptions and additions specified herein. The cord, end fittings and booster tip shall for
23、m a continuous metallic enclosure, i.e. faraday cage, around the explosive elements such that they are protected from the affects of Electrostatic Discharge (ESD). The cord shall be annealed to stabilize cord length prior to use. All parts with the same dash number shall be dimensionally and functio
24、nally interchangeable per MIL-I-8500. Aluminum end fittings shall withstand 90 inch-pounds minimum Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-82889A (OS) 4 assembly torque without deformation and stainless steel end fittings shall withst
25、and 120 inch-pounds. DCAs shall be configured such that the energy stimulus shall be contained and shall not emit shrapnel when fired in the “as-installed” condition. DCA end fittings shall remain intact in the port. Out-gassing of the DCA and fraying of the stainless steel overbraid are permissible
26、 provided that some of the overbraid remains intact and the aforementioned criteria is met. DCAs shall be constructed such that the portion of the assembly between end fittings shall not separate or disengage from the end fittings when fired in the installed condition at the temperatures specified h
27、erein. 3.5 Item definition. DCAs are the explosive stimulus used to provide for the transfer of explosive stimulus from one pyrotechnic device to another. 3.6 Item configuration. Each individual DCA shall conform to the configuration of the appropriate slash sheet and satisfy any additional tests or
28、 inspections therein. 3.7 DCA processing line inspections. 3.7.1 Length Stabilization. The cord shall be annealed to stabilize cord length prior to use. The minimum percent shrinkage achieved when first annealed shall not be less than 1.25% of the cord total length. When retested in accordance with
29、4.7.1, the minimum shrinkage shall be .2% of the sample length. 3.7.2 Visual inspection. DCAs shall be free of visual defects such as, but not limited to, burrs, deep scratches, defective ferrules and fittings, corrosion, chipped surfaces, or other defects which may prevent assembly or affect the en
30、vironmental stability of the line. The threads of the DCA end fittings shall be dry film lubricated with MIL-PRF-46010. The dash number tape, identification tape, clamp point tape and identification plate shall be verified to be in compliance with 850AS875. 3.7.3 Radiographic inspection. 3.7.3.1 X-r
31、ay examination. Each DCA end assembly and approximately 3 inches of line behind the tips shall be X-rayed. All defects shall be identified on the film and defective DCAs removed from the lot (see 4.6.9). 3.7.3.2 N-ray examination. Each DCA shall be N-rayed along the full length of the longitudinal a
32、xis. All defects shall be identified on the film and the defective DCAs removed from the lot (see 4.6.9). 3.7.4 Halar tubing. Each roll of Halar tubing shall be internal pressure tested to “ 1 atmosphere and inspected to assure no leakage before coating with HMX and Al (see 4.2.2). 3.7.5 DCA cord. T
33、he spool of cord proposed for use in production shall be tested on each end and every 500 feet to meet the detonation velocity requirements of 1400 to 2500 meters per second (see 4.2.3). 3.7.6 Corrosion. All components scheduled for use in production shall be free of corrosive products (see 4.2.5).
34、3.7.7 End fittings leakage. Each end fitting will be leak tested in a dry gas leak tester. End fittings which exhibit a leak rate in excess of 10-5 cc/sec of air at a pressure differential of 1 0.1 atmosphere, when tested Provided by IHSNot for ResaleNo reproduction or networking permitted without l
35、icense from IHS-,-,-MIL-DTL-82889A (OS) 5 in accordance with paragraph 4.2.6, shall be considered defective. End fittings which exhibit a leak rate in excess of that specified above shall be rejected. 3.7.8 Explosive weight. Every 1,000 feet a 1-meter section of cord shall be taken to verify the req
36、uirement of 20 “ 10 mg of HMX and Al per meter (see 4.2.7). 3.7.9 End fitting tensile test. The end fitting joint between the outer ferrule and the braided stainless steel casing shall be capable of withstanding a tensile load of 150 pounds minimum (see 4.2.4). 3.8 First article environmental exposu
37、re. The first article test (FAT) samples shall be environmentally conditioned in accordance with MIL-D-83125 and the test matrix of table II herein, with the exception of using an upper temperature limit of 350F for pressure cycling and temperature cycling. 3.8.1 Shock. DCAs shall meet the performan
38、ce requirements of 3.9 after being exposed to the shock environment (see 4.6.1). 3.8.2 Temperature, humidity, shock, and altitude. DCAs subjected to temperature, humidity, shock, and altitude environments shall meet the performance requirements of 3.9 (see 4.6.2). 3.8.3 Vibration. DCAs shall meet th
39、e performance requirements of 3.9 after being exposed to random sinusoidal vibration environments (see 4.6.3). 3.8.4 Pressure cycling. DCAs shall meet the performance requirements of 3.9 after pressure cycling from 3 inches of mercury to 29.92 inches of mercury at temperatures of 65F to 350F (see 4.
40、6.4). 3.8.5 Temperature cycling. DCAs shall meet the performance requirements of 3.9 after temperature cycling between 65F and 350F (see 4.6.5). 3.8.6 Minimum bend/flex. Six lines shall be wrapped a minimum of four turns on a 1-inch-diameter helix along the centerline for 4 hours minimum and meet th
41、e requirements of 3.9 (see 4.6.6). 3.8.7 Flexure Type II only. Lines shall be capable of 3,000 cycles of flexure with degradation or damage when installed between the F-18 fuselage and the canopy (see 4.6.7). 3.8.8 Salt fog. DCAs shall meet the performance requirements of 3.9 after exposure to salt/
42、fog environments (see 4.6.7). 3.8.9 Solvent resistance. DCAs shall meet the performance requirements of 3.9 after exposure to a general purpose cleaner per A-A-59281, type I, according to table I. Each exposure requires the line to be fully submerged in the cleaner for 10 seconds minimum, then allow
43、ed to air dry completely (see 4.6.8). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-82889A (OS) 6 TABLE I. Exposures for each line number. DCA Line Number Number of Exposures 1 35 2 40 3 45 4 50 5 60 6 70 3.9 Ballistic requirements. The bal
44、listic sample shall meet the requirements of 3.9.1. 3.9.1 Sensitivity. DCAs shall be fired through a sensitivity connector (Drawing 841AS801) into a sensitivity fixture from a tee (Drawing 841AS802) that is fired from one of two SMDC test tips. Each assembly shall have a 1-inch-diameter loop in the
45、assembly when tested. The assembly, when conditioned at 65F or 200F, shall propagate and produce an indent of at least 0.040 inch in a 6061-T6 aluminum dent block (Drawing 841AS803) secured in a dent block holder (drawing 841AS804). 3.10 Workmanship. DCAs shall be constructed and finished in a manne
46、r to assure compliance with all requirements of this specification. Particular attention shall be directed to dimensions, finishes, crimping, sealing, and assembly operations. 4. VERIFICATION 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows: a
47、. First article inspection (see 4.3) b. Lot acceptance inspection (see 4.5) 4.2 Inspection conditions. Unless otherwise specified (see 6.2), all inspections shall be performed in accordance with the test conditions specified in 4.6 and 4.7. 4.2.1 Interchangeability. The contractor shall conduct insp
48、ections of the production lot to verify total interchangeability of the lines and fittings. 4.2.2 Halar integrity. One end of the tube will be sealed and a + 1 atmosphere of air pressure applied to the other end for 5 minutes with no pressure loss. 4.2.3 Cord velocity. Each end and every 500 feet of
49、 planned cord production shall be tested for velocity measurement prior to actually producing any DCAs. 4.2.4 End fitting strength. Five DCAs from the lot acceptance test sample shall be subjected to the 150-pound load test to verify the fitting strength. The 150-pound load shall be reached by applying the load at a Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-82889A (OS) 7 rate of 6 pounds per
