1、 - - MIL-D-462538 13 9999906 03BOL11B 1 y - _- - MILD-46253B (PA) 11 February i974 SUPERSEDING MIL-D-46253A (MU) 15 May 1970 MILITARY SPECIFICATION DETONATOR, ELECTRIC, T20E1 PARTS FOR, AND LOADING, ASSEMBLING AND PACKING This specification Agencies of the Department of Defense. is approved for use
2、by all Departments and 1. SCOPE 1,l This specification covers the inspection of the parts and the loading, assembling and packing for one type of electric detonator designated as Detonator, Electric, T20E1. 2, APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date ( I of inv
3、itation for bids, or request for proposals, form a part of this specification to the extent specified herein. SPECIFICATIONS MILITARY MIL-A-148 - Aluminum Foil MIL-A-2550 - Ammunition, General Specification for STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attribu
4、tes (ABC-STD-105) MIL-STD-109 - Quality Assurance Terms and Definitions MIL-STD-331 - Fuze and Fuze Components, Environmental and Performance Tests For mL-STD-650 - Explosive: Testing . Sampling, Inspection and FSC: 1336 Provided by IHSNot for ResaleNo reproduction or networking permitted without li
5、cense from IHS-,-,-I I - %SL-STbii68- Lot Numbering of Ammunition .- . Procedures and Tables for Inspection by At tributes . XIL-STD-1235- Single and Multilevel Continuous Sampling . -. DRAWINGS U,S. ARMY ARMAMENT COMMAND PRODUCT AND PACKING DRAWINGS 8826740 - Detonator, Electric, T20E1, Assembly 87
6、96522 - Marking Diagram and Sealing far Wood Packing Boxes . INSPECTION EQUIPMENT DRAWINGS 8816368 - Disc, Lead -8871907 - Assembly, Holder 8873526 - Disc, Centering 9200355 - Instruction, Operating 9200356 - Set-up, Functioning 9200602 - Bushing (Copies of specifications, standards, drawings requir
7、ed by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer) . part of this specification to the extent specified herein. Vnless otherwise Indicated, the issue in effect on date of invitation for bids or r
8、equest for proposals shall apply. 2,2 Other publications. - The following document forms a CODE OF FEDERAL REGULATIONS TITLE 49 -TRANSPORATION, PARTS 0-190 The Code of Federal Regulatims is available from the Superintendent of Documents, Government Printing Office, Washington, D.C. 20402. Orders sha
9、ll specify 49 CFR 0-190 (latest revision). sel- Materials and Parts. - The materials and parts shall be in accordance with applicable drawings and specifications Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-(- MIL-D-46253B (PA) . 3.2 Detonators. -
10、 The detonators shall comply with all require- ments specifled in Drawing (Dwg.) 8826740 and with all requirements apecfied in applicable specifications. 3.3 Moisture Content 3.3.1 Lead Azide. - The moisture content of the lead azide at the loading station at the time of loading the detonators shall
11、 not exceed 0.50 percent when tested as specified. 3.3.2 Pentaerythrite Tetranitrate (PETN). - The moisture content of the PETN at the loading statlon at the time of loading the detonators shall not exceed 0.50 percent when tested as speci- fied. 3.4 Functioning. - The detonators shall comply with t
12、he 3.4.1 3.4-2 following: Time. - The detonators shall fire on the first attempt within ten (10) microseconds. Output. - The detonators shall fire on the first attempt and shall make a 3/16 minimum (min.) diameter perforation in a 0.1345 inch thick lead disc. 3.4.3 Functioning duds.- Detonators that
13、 fail to fire on the 3.5 Waterproofness. - The detonators shall comply with the 3.6 Environmental 3.6.1 Temperature and Humidity. - The detonators shall comply with 3.4.1 after testing 3.6.2 Lead circuit resistance, thermal shock, and vibration. - The detonators shall comply with the lead circuit re
14、sistance require- ment of dwg. 8826740 and with 3.4.1, first attempt are duds. The detonators shall not dud. requirements of 3.4.2 and 3.4,3. as specified in MIL-STD-331, Test 105.1. 3.6.3 with 3.4.3. Cold Temperature. - The detonator assembly shall comply 3.6.4 with 3.4.3. Hot Temperature.- The det
15、onator assembly shall comply 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.7 .Workmanship, - All parts and assemblies shall be fabricated and loaded in a thorough, workmanlike manner They shall be free of burrs chips , sharp edges cracks surfac
16、e defects, dirt , grease, rust, Wrrosion products and Other foreign matter. The cleaning method used *hall not be injurious to any part nor shall the parts he contaminated ba the cleaning agent. All required markings shall be neat and sharply defined . technical provisions for first article inspecti
17、on. Requirements for the submission of -first article samples shall be as specified In the contract. . porosity as. indicated by air bubbles. 3.8 First Article Inspection. - This spectfication contains, - - 3.9 The plug assembly (dwg. 9280965) shall show no evieence of 4 . QUALITY ASSURANCE PROVISIO
18、NS 4.1 Besponsibiltp for fnspection. - Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or order, the supplier may usehis own or any other fa
19、cilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspec- tions are deemed necessary to assure supplics and service
20、s conform to prescribed requirements . Reference shall be made to MIL-STD-109 to define terms used herein. The pravisions of MIL-A-2550 shall apply. Submission of Product. - At the time each completed lot of items deliverable under the contract is submitted to the Government for acceptance, the cont
21、ractor shall supply the following information accompanied by a certificate which attests that the information pro- vided is correct and applicable to the product being submitted. assurance provisions specified in this specification. identification and date of. changes thereto. meets requirements, wh
22、en such material is controlled by Government or commercial specifications referenced in any of the contractual docu- ments, and that certificates of conformance are on file and available for review. 4.1.1 a. A statement that tie lot complies with all of the quality 1 b. Drawlng and specification num
23、ber and date, together with ! : C. A statement that all material purchased by the contractor d. Number of items in the lot. e. Date submitted. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-46253B (PA) The certificate shall be signed by a re
24、sponsible agent of the certifying organization. The initial certificate submitted shall be substantiated by evidence of the agents authority to bind his principal. Substantiation of the agents authority Will not be required with subsequent certificates unless, during the course of the contract, this
25、 authority is vested in another agent of the certifying organization. . r4.2 First Article Inspection 4.2.1 Submission. - Prior to the start of regular production the contractor shall submit a first article sample (see 6.l.c) to a Government approved facility as designated by the contracting officer
26、 for evaluation in accordance with the provisions of 4.2.2 and 4.2.3. The first article sample shall consist of 25 complete sets of parts and sub-assemblies (i.e. 25 each of every component and sub-assembly), which have been produced by the contractor or furnished by a supplier and which have been m
27、anufactured using the same production processes, procedures and equipment which will be used in fulfilling the contract, All parts and materials in- cluding packaging and packing shall be obtained from the same source of supply as will be used in regular production. Prior to submission, the contract
28、or shall inspect the sample to the degree necessary to assure that it conforms to the requirements of the contract and submit a record of this inspection with the sample, including a certificate of conformance for materials. A sample containing known defects will not be submitted unless specifically
29、 authorized by the Contracting Officer. article sample, or portion thereof, as directed by the Contracting Officer, shall also be submitted whenever there is a lapse in production for a period in excess of 90 days or whenever a change occurs in manufacturing process, material used, drawing or speci-
30、 fiaction such as to significantly affect product uniformity as determined by the Government. Inspections to be performed. - Assemblies and components will be subjected by the Government to any or all of the examinations and tests specified in this specification and any or all requirements of the ap
31、plicable drawings. Rejection. - If any component fails to comply with the applicable requirements, the first article sample shall be rejec- ted. The Government reserves the right to terminate its inspection upon any failure of an ineqt component or sub-assembly to comply with any of the stated requa
32、rements. A first 4.2*2 4.2.3 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-K. Visual 08001 102. Ferrule missing Visual 08002 . - - . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-46253B (P
33、A) Minor : AQL 0.65 percent 201. Evidence of poor workmanship (see 3.7) Visual 08003 4.3.2.9 Assembly (see dwg. 8826740) 1 Categories Critical: Defects Method of Code No, Inspection 1. Lead wires not shorted Visual ogooi 2. Cup cracked or split Visual 09002 Ma3 or : AQL 0.65 percent , 101. Length Ga
34、ge 09003 102. Diameter Gage 09004 103. Crimp not full 360 degrees Visual 09005 104. Joint seal missing or incomplete. Visual 09006 Minor: AQL 0.65 percent 201. Evidence of poor workmanship (see 3.7) . Visuai 4.3.2.10 Carton, prior to sealing (see Section 5). Categories Defects Method of Critical: No
35、ne defined Maj or : Inspection AQL 0.65 percent 101. 102. Detonators in bundle not 103. Incorrect number of detonators Visual completely encased in foil Visual Packet assembly torn or insecurely closed (when applicable) Visual Minor: AQL 1.00 percent 201. Evidence of poor workmanship 202. Package ma
36、rlcang missing, (see 3.7) . Visuai incorrect or illegible Visual 4.3.2.11- Carton, sealed (see section 5). 09007 Code No. 10001 10002 10003 10004 10005 11 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Defects Method of Inspection Critical: None def
37、ined Haj or : AQL 0.40 percent 101. Carton damaged to extent that contents are exposed or liable to become exposed Visual Mnor: AQL 1.00 percent 201. Marking missing, incorrect or illegible Visual 4.3.3 Testing. - Unless otherwise specified herein, sampling plans for the following tests shall be in
38、accordance with MIL-STD-105 . 4.3.3.1 Moisture content (see 3.3) - Major defects TABLE I Materials Code Number Lead Azide PETN 12001 12002 Code No. 11001 11002 the The contractor shall provide adequate controls to insure compliance with the requirements, and shall test for verification one sample of
39、 each material from each eight hours production of detonators. Composite samples shall not be used. If the moisture content of a sample exceeds the requirement, and loading has not begun, that quantity of material represented by the sample shall be rejected. II detonators have been loaded with mater
40、ial contain- ing excessive moisture, the remaining material that is represented by the sample together with all detontors loaded with the non-con- forming material shall be rejected. The tests shall be performed as specified in 4.4.1.1 or 4.4.1.2 as applicable. 4.3.3.2 Functioning and waterproofness
41、 (see 3.4 and 3.5). 4.3.3.2.1 Sampling. - One hundred andeighty-five (185) detonator assemblies shall be-selected from each lot for test. The sequence of testing kid the number of samples to be subjected to each test shall be as specified in Table II. 12 _- -1.- - Provided by IHSNot for ResaleNo rep
42、roduction or networking permitted without license from IHS-,-,-MIL-D-46253B 13 770b 0330430 2 - - MIL-D-46253B (PA) TABLE II Code No. of Test Test Sequence Classification No. Samples Paragraph 1. Time (see 3.4.1) Major 09009 35 4.4.2,i 2. Waterproofness (see 3.5) and Output(see 3.4.2) Major 09010 50
43、 4.4.2.2 3. Duds (see 3.4.3) Major 09011 *lo0 less 4.4.2.3 time and output duds *Duds that occur in the time or output phase of testing shall be recorded and replaced from this sample. 4.3.3.2.2 Rejection. - The lot shall be rejected if any of the following test results occur: a. of 2.27 and the sta
44、ndard deviation(s1 (see 6.6) exceed ten (10) microseconds). b. Waterproofness and Output. - One or more detonator assemblies fail to produce a perforation of the required size in the lead disc. c. Duds. - The total number of detonator assemblies that fail to fire on the first attempt in the time, wa
45、terproofness and output, and dud tests equals or exceeds two (2). Time, - The mean functioning time (x) plus the product 4.3.3.3 Environmental (see 3.6) 4.3.3.3.1 Sapling. - Eighty-seven (87) detonator assemblies shall be selected from each lot for test. The sequence of test and the number of sample
46、s to be subjected to each test shall be as specified in Table III. TABLE III Test - Classification Test No, of Code No. Paragraph Samples 1. Lead circuit resis- tance, thermal shock, and vibration (see 3.6.2) - Major 4.4.3.2 *37 resis- 09012 tance time 09013 - Provided by IHSNot for ResaleNo reprodu
47、ction or networking permitted without license from IHS-,-,-WL-D-4625m (PA) 2. Cold temperature .(see 3.6.3) MaJ or 4.4.3.3 25 09014 .(see 3.6.4) TJlaJor . 4.4.3.4 25 09015 *- . -3. Hot. tempera.ture *Time calculations shall be based on 35 firings, buds 4.33.3.2 shall be recorded and replacements fir
48、ed. Rejection. - The lot shall be rejected if any of .the following functioning results occur: functioning time (X) plus the product of 2.27 and the standard deviation(s) (see 6.6) exceeds ten (10) microseconds. a. Time gfter.therma1 shock and vibration. - The mean b. Dud - The total number of deton
49、ator assemblies that fail to fire on the first attempt after environmental conditioning as specified in 1, 2, or 3 of Table III equals or exceeds one. onator assemblies that fail to comply with the lead circuit resis- tance requirement during thermal shock and vibration conditioning equals or exceeds one. Defect - Code No, 04006. - The sampling plan for this te
