1、1 INCH-POUND I Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to the Commander, Indian Head Division, Naval Surface Warfare Center, Engineering Documentation Branch (Code 4230), 1 O1 Strauss Avenue
2、, Indian Head, Maryland 20640-5035, by using the Standardization Document Improvement . Proposal (DD Form 1426) appearing at the end of this document or by sending a letter. =MIL-DTL-320 18 13 March 2001 SUPERSEDING SCD 837AS118, Rev. B 10 August 1990 DETAIL SPECIFICATION CORD ASSEMBLY, MILD DETONAT
3、ION, CANOPY PERIPHERY, P/N 837AS118 This specijcation is approved for we by the Naval Sea Systems Command, Department of the Navy, and is available for tue by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements for the manufacture
4、 and acceptance of the MG40 Canopy Periphery Mild Detonation Cord (MDC) Assembly, P/N 83AS118 , referred to in this document as cord assembly. 2. APPLICABLE DOCUMENTS 2.1 General. The docunients listed in this section are specified in sections 3 and 4 of this specification. This section does not inc
5、lude 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 completeness of this list, document users are cautioned that they must meet all specified requirements documents specified in Sections
6、 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications and standards. The following specifications and standards form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those li
7、sted in the issue of the Department of Defense Index of Specifications and Standards (DoDISS) and supplements thereto, cited in the solicitation (see 6.2). AMSC NIA FSC 1377 DISTRIBUTION STATEn/lENT A: Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproducti
8、on or networking permitted without license from IHS-,-,-. MIL-DTL-320 18 SPECIFICATIONS m DEPARTMENT OF DEFENSE MIL-P-8 184 Plastic Sheet, Acrylic Modified MIL-DTL-2 1625 Design and Evaluation of Cartridges for Cartridge Actuated Devices STANDARDS DEPARTMENT OF DEFENSE MIL-STD-1 O0 Engineering Drawi
9、ng Practices MIL-STD-1168 Ammunition Lot Numbering and Ammunition Data Cards (Unless otherwise indicated, copies of DoD specifications are available from: Standardization Documents Order Desk, Bldg. 4D, 700 Robbins Avenue, Philadelphia, PA 19 1 1 1-5094.) 2.2.2 Other Government documents, drawings a
10、nd publications. The following other Government documents, 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. SPECIFICATIONS NAVAL SEA SYSTEMS COMMAND (CAGE Code 5371 1) WS 5003 Hexanitro
11、stilbene (HNS), Explosive DRAWINGS NAVAL AIR SYSTEMS COMMAND (CAGE Code 30003) 837AS 1 18 Cord Assembly, Mild Detonating, Canopy Periphery , 837AS829 Cord Assembly, Mild Detonating, Test Fixture (Application for copies should be addressed to the Commanding Officer, Naval Air Technical Service Facili
12、ty, 700 Robins Avenue, Philadelphia, PA 19 1 1 1-5079.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. MIL-DTL-32018 2.3 Non-Government publications and drawings. The following documents form a part of this document to the extent specified herei
13、n. Unless otherwise specified, the issues of the documents, which are DoD adopted, are those listed in the issue of the DoDISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in DoDISS are the issues of the documents cited in the solicitation (see 6.2). AMER
14、ICAN SOCIETY FOR TESTING MATERIALS (ASTM) ASTM E 748 Standard Practice for N-Ray Inspection ASTM E 1742 Standard Practice for Radiographic Inspection (DoD adopted) (Application for copies of ASTMs should be sent to the American Society for Testing and Materials, 1 O0 Barr Harbor Drive, West Conshoho
15、cken, PA 19428-2959.) AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)/ AMERICAN SOCIETY FOR QUALITY CONTROL (ASQC) ANSIiASQC Z 1.4 Sampling Procedures and Tables for Inspection by Attributes (DoD adopted) (DoD activities may obtain copies from: Standardization Documents Order Desk, Bldg. 4D, 700 Robbin
16、s Avenue, Philadelphia, PA 191 1 1-5094. The private sector and other Government agencies may purchase copies from the American Society for Quality Control, P. O. Box 3005, 61 1 E Wisconsin Ave., Milwaukee, WI 53201-4606.) OEA AEROSPACE INC. (CAGE CODE 176 10) 5 1852-1 Detonating Cord Assembly, Cano
17、py Periphery (Application for copies should be addressed to OEA AEROSPACE INC., Highway 12 and Explosive Technology Road, Fairfield, CA 94533.) MC CORMICK SELPH, INC. (CAGE Code 0633 i) 8 19782-1 Detonating Cord Assembly, Canopy Periphery (Application for copies should be addressed to MC CORMICK SEL
18、PH, INC., 3601 Union Road, P.O. Box 6, Hollister, CA 95023.) 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 this document, 3 Provided by IHSNot for ResaleNo reproduction or
19、networking permitted without license from IHS-,-,-. MIL-DTL-32018 however, supercedes 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 (see 6.2), a sample shall be subjected to first art
20、icle inspection as specified in section 4.3 (see 6.4). A first article inspection shall be required if: a. One or more years has passed since MDC or similar items have been manufactured, b. there has been a major turnover in personnel, c. there have been major changes to the production facility or d
21、. there has been a transfer of production to a new facility or site. 3.2 Design and construction. The MDC shall be manufactured to contractor drawings 8 19782- 1 or 5 1852- 1, as applicable, and shall meet the requirements of this specification with special effort to ensure inherent reliability so t
22、hat the units will consistently perform as specified. 3.3 Detonatining cord velocity. The detonation velocity of the detonating cord shall be 5,900 meters per second minimum when tested at -65F in accordance with 4.4.2. The detonation wave shall propagate through the entire length of the test specim
23、en. 3.4 Core load. The range of the explosive cord loading in grains per foot, divided by the minimal core load shall not exceed 24 percent when calculated from the detonating cord sample data obtained from 4.4.3. 3.5 MDC and booster interface. 3.5.1 Visual inspection. All MDC and booster interfaces
24、 manufactured under contract shall be visually inspected and screened for defects (see 4.2.1). 3.5.2 Leakage. All MDC and booster interfaces shall not exhibit a leak rate in excess of 1 x 10” cubic centimeters per second of air when tested as specified in 4.4.4. 3.5.3 Radiographic inspection. All MD
25、C and booster interfaces shall be free of imperfections when examined radiographically as specified in 4.4.5 and 4.4.6. I 3.5.4 Canopy periphery MDC assembly and subscale assembly. 3.5.4.1 Visual inspection. All assemblies and subscale assemblies manufactured under contract shall be visually inspect
26、ed and screened for defects (see 4.2.1). 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. MIL-DTL-320 18 Environment Temnerature & humiditv Cvcline: 3.5.4.2 Radiographic inspection. All assemblies and subscale ass“eb1ies shall be free of imperfect
27、ions when examined radiographically as specified in 4.4.5. Quantity 6 3.6 Ballistic requirements. Subscale assemblies from each first article lot and production lot samples shall meet the requirements listed below, when subjected to the tests prescribed in 4.5. Salt spray: conditioning at -65 OF: 3.
28、6.1 Performance. The MDC shall deliver sufficient energy to sever completely the 0.3 1 * 0.03 inch thick cast acrylic plate per MIL-P-8 184 over the temperature range of -65 OF to +200“F. 6 3 3.6.1.2 Misfire. There shall be no misfires (see 4.5.2). Conditioning at +200 OF: Investigative samDle: 4. V
29、ERIFICATION 3 1 4.1 Classification of inspections. a. First article inspection (see 4.2) b. Conformance inspection (see 4.3) c. Lot acceptance inspection (see 4.4) 4.2 First article inspection. Before entering into quantity production, an acceptable first article sample of 19 subscales shall be prep
30、ared using the same procedures and methods proposed for manufacture of the production lot. An acceptable sample is one that has passed all the tests and examinations of 3.3,3.4 and 3.5. 4.2.1 Test methodology. Eighteen of the 19 cartridges shall be expended in the tests listed herein and one shall b
31、e retained for investigative purposes. First article sample environments shall consist of the following conditioning in table I. Table I. First article tests. Subscales shall be fired as described in 4.5 and shall meet the fiinctional requirements of 3.6.1. 4.3 Conformance inspection. Provided by IH
32、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. MIL-DTL-32018 4.3.1 Visual inspection. Visually examine all MDC and booster ikerfaces prior to final assembly, then examine all full-scale and subscale assemblies. Reject those with inadequate or illegible descript
33、ive marking or serial numbers, dents, deep scratches or other defects, which may prevent proper installation or function. 4.3.2 Corrosion. All parts and components shall be visually inspected prior to assembly to assure there is no corrosion on the hardware. Parts will be inspected to assure parts a
34、re free from nicks and blemishes. 4.3.3 Moisture content. Prior to the loading of explosive shall be determined to veri conformance to the 0.3 % maximum moisture content requirement of drawing 837AS118. 4.4 Lot acceptance inspection. 4.4.1 Sampling. To meet the requirements of 3.3 and 3.4 a 12-inch
35、length of cord from each end of the spool and a 12-inch length every 100 feet of the planned cord production shall be removed from the spool for testing. The twelve-inch sample shall be divided into a 9-inch length for velocity tests and the 3-inch sample for the cord loading tests. Failure of any s
36、ample to meet the requirements of 3.3 and 3.4 shall result in the rejection of the sampled cord. 4.4.1.1 Sampling for ballistic tests. Components used in the assembly of the subscale assemblies for ballistic test shall be selected from the production lot in accordance with the requirements of Table
37、I, General Inspection Level JI of ASQC Z1.4 with the exception that the lot size is limited to 5 1 minimum and 9 1 maximum and the sample size shall be 8 subscales. 4.4.2 MDC velocity. The samples shall be tested for velocity measurements by detonating a 9-inch segment, conditioned at -65 OF for 3 h
38、ours minimum, with a No. 6 blasting cap with velocity measured over a fixed interval prior to producing any MDC assemblies. The velocity shall meet the requirements of 3.3. 4.4.3 Core load. The amount of core explosive for the 3-inch sample shall be determined to veri conformance with the requiremen
39、ts of 3.4. 4.4.4 Leakage. Each length of MDC and booster interfaces shall be leaked tested in a dry gas leak tester to determine conformance with 3.5.2. Units, which exhibit a leak rate in excess of 1 x 10” cubic centimeters per second of air at a pressure differential of 1 .O atmospheres, shall be
40、? rejected. 4.4.5 Radiographic inspection. Each length of MDC and booster interface, prior to assembling in the canopy periphery, and each subscale, shall be subjected to radiographic inspection in accordance with ASTM E 1742. The samples shall be arrayed on trays or boards in consecutive numerical
41、order and each radiograph shall carry a permanent identification of the MDC and 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. MIL-DTL-320 18 subassembly displayed thereon. The MDC and subscales shall be p8sitioned to give the most revealing cro
42、ss-section of each unit. All units shall be identified with serial numbers prior to radiographic inspection. The radiographic identification shall include the complete lot number and the span of serial numbers displayed. Discontinuities in serial numbers shall be identified on the plate. Defective M
43、DC and subscales shall be clearly identified on the plate and shall be removed. Radiographs or copies of the entire production lot shall accompany the ballistic sample to the activity conducting the production conformance test (see 6.2). 4.4.5.1 Marriage log. Loaded booster sleeves shall be radiogra
44、phed (N-Ray) separately and serialed. A marriage log shall be maintained that records each booster with the serial number of the MDC assembly for future reference. 4.4.6 N-Ray inspection. Each MDC and booster interface shall be N-Rayed, in accordance with ASTM E 748, along the full length of the lon
45、gitudinal axis to verify the presence of explosive, the absence of foreign hydrogenous material, and veri that gaps and compaction densities are within control standards. Any observable imperfection shall be cause for rejection of the unit. 4.4.7 X-Ray inspection. Each MDC length and booster interfa
46、ce and subscale shall be X- Rayed, in accordance with ASTM E 1742, to verify the presence, condition and proper installation of parts. Any observable imperfection shall be cause for rejection of the unit. 4.5 Ballistic tests. Subscale assembly test samples shall be selected in accordance with 4.4.1.
47、1 The samples shall be divided equally between the -65 OF and the t-200 OF conditioning groups. The units shall be conditioned for a time period of not less than 4 hours or more than 24 hours. Subscales shall be fired as shown on drawing 837AS829. Units shall be fired within 5 minutes of removal fro
48、m conditioning. If not fired within 5 minutes, recondition for 2 hours and retest. 4.5.1 Acceptance criteria. The lot shall be acceptable with respect to functional testing if the low and high temperature groups meet the requirements of 3.6. I. Accept on no defects, reject on one or more. 4.5.2 Misf
49、ire. A subscale that does not fire under the conditions specified in 4.5 shall be considered unacceptable, unless the misfire is clearly attributable to faulty test equipment or procedure. 4.5.3 Retest. There shall be no retest. 4.5.4 Test failure. If a test failure is attributed to an assignable cause, excluding the test sample, the original test results shall be discarded and that test reconducted. 5. PACKAGING 7 Provided by IHSNot for ResaleNo reproduction or n
