1、INCH- POUND MIL-DTL-32083A (OS) 14 September 2004 SUPERSEDING MIL-DTL-32083 (OS) 10 May 201 DETAIL SPECIFICATION CARTRIDGE, FIRE EXTINGUISHER, MK 272 MOD 0 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
2、 agencies of the Department defense 1. SCOPE 1.1 Scope. This specification covers the requirements for the manufacture and acceptance of the MK 272 Mod 0 Fire Extinguisher Cartridge, referred to herein as the “cartridge.” 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are
3、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 completeness of this list, document users are caution
4、ed 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, standards, and handbooks form a part of this docu
5、ment to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-1168 Ammunition Lot Numbering and Ammunition Data Card (Copies of these documents are available online at http:/assi
6、st.daps.dla.mil/quicksearch/ or http:/www.dodssp.daps.mil/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) Comments, suggestions, or questions on this document should be addressed to Commander, Indian Head Division, Naval Surface Warfar
7、e Center, Technical Information Branch (Code 4230), 101 Strauss Avenue, Indian Head, Maryland 20640-5035, or emailed to pennamih.navy.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at www.dodssp.daps.mil. AM
8、SC N/A FSC 1377 DISTRIBUTION STATEMENT A: Approved for public release; distribution is Limited.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32083A (OS) 2.2.2 Other Government documents, drawings, and publications. The following Government
9、drawings form a part of this specification to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation (see 6.2). DRAWINGS NAVAL SEA SYSTEMS COMMAND (CAGE Code 53711) DL7263959 MK 272 MOD 0 Cartridge Shipping Assembly (Application for copies should be a
10、ddressed to the Commander, Indian Head Division, Naval Surface Warfare Center, Documentation Branch (Code 4230), 101 Strauss Avenue, Indian Head, MD 20640-5035.) 2.3 Non-Government publications. The following document form a part of this document to the extent specified herein. Unless otherwise spec
11、ified, 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 the DODISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN SOCIETY FOR TESTI
12、NG AND MATERIALS (ASTM) ASTM E 1742 Standard Practice 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 the American Society for Testing and Materials Customer Service
13、, 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 this document, however, supersedes applicable laws and regulations
14、 unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.3), a sample shall be subjected to first article inspection in accordance with 4.2.1. 3.2 Primary components. Only one lot of primary components shall be used in each lot of fire extinguisher car
15、tridges, although a primary component lot may be used in more than one fire extinguisher cartridge lot. The ignition and output charges are considered primary components. 3.3 Cartridge production. The cartridges shall be manufactured in accordance with Drawing 7263959 and the documents listed thereo
16、n. Each cartridge shall meet the requirements of 3.3.2. Failure of any cartridge to meet the applicable requirements of 3.3 shall result in rejection of that unit. 3.3.2 Cartridge inspection. 3.3.2.1 Visual inspection. Cartridges shall not exhibit inadequate or illegible descriptive markings or seri
17、al numbers, dents, deep scratches, or other deflects which may prevent proper installation or function when inspected in accordance with 4.3.1. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32083A (OS) 3.3.2.2 Radiographic inspection. Car
18、tridges shall show proper assembly, presence of parts, and sealing when examined radiographicly in accordance with 4.3.2. 3.3.2.3 Leakage. Cartridges shall not exhibit a leak rate in excess of 1x10-5cubic centimeters per second (cm3/sec) of air when tested in accordance with 4.3.3. 3.3.2.4 Insulatio
19、n Resistance. Cartridges shall exhibit an insulation resistance of 20 megohms minimum when tested in accordance with 4.3.4. 3.3.2.5 Electrostatic Discharge. Cartridges shall not fire, dud, or be damaged when tested in accordance with 4.3.5. 3.3.2.6 Bridgewire resistance. Cartridges shall exhibit a b
20、ridgewire resistance between 0.90 and 1.10 ohms when tested in accordance with 4.3.6. 3.4 Environmental requirements. Cartridges shall be capable of meeting all requirements of 3.4.1 through 3.4.3. 3.4.1 Vibration. There shall be no evidence of deformation or derangement of components. The cartridge
21、 shall not auto ignite, shall be safe to handle, and shall meet the requirements of 3.3.2.2 through 3.3.2.6 following vibration testing in accordance with 4.3.7. 3.4.2 Temperature, humidity, altitude cycling (THA). The cartridges shall meet the requirements of 3.3.2.2 through 3.3.2.6 after being exp
22、osed to the THA cycle in accordance with 4.3.8. 3.4.3 Shock. The cartridges shall meet the requirements of 3.3.2.2 through 3.3.2.6 following shock testing in accordance with 4.3.9. 3.4.4 Ballistic requirements. Cartridges from each production and first article lot shall meet the requirements of 3.4.
23、4.1 through 3.4.4.4 when tested in accordance with 4.3.10. 3.4.4.1 No fire. Cartridges shall not fire, dud or otherwise be damaged when tested in accordance with 4.3.10.1 3.4.4.2 Function. The cartridge shall fire when tested in accordance with 4.3.10.2 3.4.4.3 Indent. The cartridge shall indent the
24、 dent block .018 inches minimum when tested in accordance with 4.3.10.2.1.2. 3.4.4.4 Misfire. There shall be no misfires. 4. VERIFICATION 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.2.1) b. Production i
25、nspection (see 4.2.2) c. Lot acceptance inspection (see 4.2.3) 4.2 Types of inspections. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32083A (OS) 4.2.1 First article inspection. Before entering into quantity production, an acceptable fir
26、st article sample of 63 cartridges shall be prepared using the same procedures and methods proposed for the production lot. A first article sample acceptable for functional and environmental testing shall be defined as a sample which has met the applicable requirements of 3.2 through 3.4 of this spe
27、cification. Sixty cartridges shall be expended in the tests listed in table I, and three shall be retained for investigative purposes. The contractor shall deliver the cartridges to the activity designated by the contracting agency for tests. Any damage inflicted by the environmental treatments, whi
28、ch would adversely affect the performance of the item in service application shall cause rejection of the first article sample. Any further production prior to notification by the contracting agency of first article sample acceptability shall be at the contractors risk. Failure of any cartridge to c
29、omply with the requirements of section 3 shall be cause for rejection of the first article represented. TABLE I First Article Test Plan Cartridge Groups Total Test Sequence Requirement paragraph Test paragraph I II III IV V VI Visual 3.3.2.1 4.3.1 6 6 12 12 12 12 60 Radiographic 3.3.2.2 4.3.2 6 6 12
30、 12 12 12 60 Leakage 3.3.2.3 4.3.3 6 6 12 12 12 12 60 Insulation Resistance 3.3.2.4 4.3.4 6 6 12 12 12 12 60 Electrostatic Discharge 3.3.2.5 4.3.5 6 6 12 12 12 12 60 Resistance 3.3.2.6 4.3.6 6 6 12 12 12 12 60 Shock 3.4.3 4.3.9 6 6 Vibration 3.4.1 4.3.7 6 6 Temperature Humidity Altitude 3.4.2 4.3.8
31、12 12 Radiographic 3.3.2.2 4.3.2 6 6 12 24 Leakage 3.3.2.3 4.3.3 6 6 12 24 Insulation Resistance 3.3.2.4 4.3.4 6 6 12 24 Resistance 3.3.2.6 4.3.6 6 6 12 12 12 12 60 Functional Test 3.4.4 4.3.10 6 6 12 12 12 12 60 4.2.2 Production inspection. All production cartridges manufactured under contract shal
32、l be inspected and screened to requirements specified in 3.2 through 3.3.2.6. Any unit failing to meet the requirements listed in 3.2 through 3.3.2.6 shall be rejected and removed from the lot. 4.2.3 Lot acceptance inspection. Lot acceptance inspection shall consist of the examinations and tests spe
33、cified in table II. Failure of any sample cartridge to comply with the requirements listed in table II shall be cause for rejection of the lot represented. 4.2.3.1 Sample size. A random sample from each production lot, including the retained sample for investigative purposes, shall be selected in ac
34、cordance with table III for lot acceptance inspection. Test sample cartridges and cartridges retained for investigative purposes shall not be applied as part of the quantity specified for delivery by the contract or purchase order. 4 Provided by IHSNot for ResaleNo reproduction or networking permitt
35、ed without license from IHS-,-,-MIL-DTL-32083A (OS) TABLE II Lot acceptance inspections and tests Inspection/Test Test Paragraph Quantity Visual 4.3.1 AllRadiographic 4.3.2 All Leak 4.3.3 AllResistance 4.3.6 AllFunctional Test 4.3.10 All TABLE III lot acceptance sampling Lot Size Test Sample Size Re
36、tained Sample Size 2 to 25 3 3 26 to 50 8 3 51 to 90 13 3 91 to 150 20 3 151 to 280 32 3 280 to 500 50 3 4.3 Inspections and tests. 4.3.1 Visual inspection. Each cartridge shall be visually examined. Cartridges that do not meet the requirements of 3.3.2.1 shall be rejected. 4.3.2 Radiographic examin
37、ation. . Radiographic examination of cartridges shall include x-ray in accordance with ASTM E 1742. All cartridges shall be identified with serial numbers beginning with 001 prior to examination. The cartridges shall be arranged on trays or boards in consecutive numerical order with any missing seri
38、al numbers identified on the radiographic plate. The cartridges shall be positioned for the most revealing exposure with the long axis perpendicular to the radiographic beam. Each radiograph shall carry a permanent identification of the items displayed thereon in a 4 x 6 inch region maximum. The rad
39、iographic identification shall include the drawing number, the complete lot number in accordance with MIL-STD-1168, the contract number, and the span of serial numbers displayed. Radiographs of the entire production lot shall accompany the ballistic sample to the activity conducting the tests (see 6
40、.2). Defective cartridges found during radiographic review are to be marked on the radiographic plate and removed from the production lot. 4.3.3 Leak test. Each cartridge produced shall be leak tested in a dry gas leak tester to determine conformance with 3.3.1.2. Cartridges that do not meet the req
41、uirements of 3.3.2.3 shall be rejected. 4.3.4 Insulation Resistance. An direct current of 500 25 volts shall be applied between pins A and B shorted together and the cartridge case for 15 1 seconds using an appropriate test meter. The positive lead shall be connected to the pins. Cartridges that do
42、not meet the requirements of 3.3.2.4 shall be rejected. 4.3.5 Electrostatic Discharge. Discharge from 500 5% pico farad capacitor charged to 25000 500 volts through a 5000 5% ohm resistor in a 5 micro henry total inductance series circuit shall be applied between pins A and B. A second discharge sha
43、ll be applied between the pins A and B shorted together and the case of the cartridge. The test shall be conducted in both polarities. Cartridges that do not meet the requirements of 3.3.2.5 shall be rejected. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fro
44、m IHS-,-,-MIL-DTL-32083A (OS) 4.3.6 Bridgewire resistance. Each cartridge shall be screened for proper bridgewire resistance by use of a resistance bridge or other suitable test circuit. Cartridges that do not meet the requirements of 3.3.2.6 shall be rejected. 4.3.7 Vibration. The cartridges shall
45、be installed in a suitable vibration test. The cartridges shall be vibrated in three mutually perpendicular axes. The cartridges shall be subjected to sinusoidal vibration at 70F along axis I to the levels shown in Figure 1 for sixty minutes. The frequency shall be logarithmically swept from 5 to 20
46、00 Hz and return to 5 Hz in approximately 20 minutes. After completion of vibration along axis I, the test shall be repeated along axes II and III. After completion of vibration at +70F, the vibration procedure shall be repeated at +200F. After completion of vibration at +200F, the vibration procedu
47、re shall be repeated at -65F. 10 300 10002000.01.101.0ACCELERATIONPOWERSPCTRALDENSITYFREQUENCY - Hz150.10(g2/Hz).044 dB/Octave6 dB/OctaveFigure 1 Vibration Test Level 4.3.8 Temperature, Humidity and Altitude Cycling (THA). The cartridges shall be supported on screen trays so that all areas are expos
48、ed to the prescribed atmospheric conditions at all times. During weekdays the cycling scheduling is as follows: Monday 0800 Place test items in a chamber maintained at +70F at 50 percent relative humidity (RH). 1200 Raise chamber temperature to +160F and the RH to 95 percent. The chamber temperature
49、 shall reach +160F at 95 percent RH not later than 1300. 1600 Remove test items from above chamber and immediately place in a chamber maintained at -65F at a pressure altitude of 70,000 feet (0.65 psi). This schedule shall be followed for a total of 4 weeks (28 days) except that on the first and third weekends the cartridges are soaked at -65F and ambient pressure, and on the second and fourth week
