1、MIL-N-474A 13 m 7797706 0434175 7 MIL-N-494A 22 MARCH 1963 MILITARY SPECIFICATION SUPERSEDING JAN-N-494 10 SEPTEMBER 1947 cr) c 3 n M m NITROGUANIDINE (PICHTE) ThG specification has been apprmed by the Department of Defense ad 2s man- atq fw use by the Departments o# the Amy, the Naw, and the A9 For
2、ce. 1. SCOPE 1.1 Scope. This specification covers nitr Sampling, Zxamina- tion and Testing. MIL-STD-1233- Procedure for Determ- ining Particle Size Distribution and Packing Density of Powdered Mat erial. MIL-STD-1235- Single and Multilevel Continuous Sampling Procedures and Tables for Inspection by
3、Attributes. (Copies of speciications, standards, drawings and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer). 2.2 Other publications. The following docu- ment forms a part
4、of this specification 0 the extent specified herein. Unless otherwise indicated, the issue in effect on date of in- vitation for bids or request for proposals shall apply. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-N-1-191-1A 33 m 939790b 01
5、-134376 9 MIGN494A Prwertieer . Purity (assay) Ash content pH value Acidity (as sulfuric acid) Total volatiles Sulfates (as sodium sulfate) Water insoluble impurities TABLE I TUPS I . Percent Hinimunr Maximum 98.0 -._. 0.30 4.5 . 7.0 0.60 0.25 0.20 0.20 . CODE OF FEDERAL REGULATIONS 49 CFR 71-90 - I
6、nterstate Commerce Commission Rules and Regulations for the Transportation of Explosives and Other Dangerous Articles. (The Interstate Commerce Commissions regula- tions are now a part of the Code of Federal Regu- lations (1949 Edition - Current Revision) available from the Superintendent of Documen
7、ts, Government Printing Office, Washington 25, D. C. Orders for the above publication should cite “49 CFR 71-90 (Current Revision)”.) . 3, REQUIREMErNTS 3.1 Material. Nitroguanidine, as received, shall be a white, free flowing, crystalline powder, when tested as specified in 4.3. 3.2 Properties. Nit
8、roguanidine shall be in accordance with the chemical properties spe- cified in table I, when tested in accordance with the applicable subparagraphs specified therein (see 6.4). 3.3 Average particle size. Nitroguanidine shall comply with the average particle size specified in table II, when tested in
9、 accord- ance with 4.3.8. TABLE II Average particle 8ize - Microne ClCrse Miairnum Maximum 1 4.3 6.0 2 Less than 3.3 3.4 Workmanship. The nitroguanidine and ail containers shali be free from dirt, oil, grease, wood chips and other foreign mate- rial. 4. QUALITY ASSURANCE PROVISIONS h . TwIl - -. Par
10、d? -. 99,o _- 0.30 4,5 7.0 0.06 0.25 0.20 0.20 P.% :A Minimum Maximum Subparaoraph 4.3.1 4.3.2 4.3.3 4.3.4 4.3.5 4.3.6 4.3.7 4.1 General quaiity assurance provisions. The supplier is responsible for the perform- ance of all inspection requirements as speci- fied herein. Except as otherwise specified
11、, the supplier may utilize his own or any other inspection facilities and services acceptable to the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such in- spections are deemed necessary to assure sup- plies and services conform
12、to prescribed re- quirements. Reference shall be made to Stan- dard MILSTD-IO9 in order to define the terms used herein. Inspection shall be per- formed in accordance with this specification and other specifications referenced in any of the contractual documents. 4.1.1 Contractor quaitq assurance sy
13、stem. If the contractor desires to utilize a quality assurance system, which is at variance with the quality assurance provisions of 4.2 and 4.3 and other documents referenced herein, he shall submit a written description of the system to the contracting officer for approval prior to initiation of p
14、roduction. It shall in- clude a description covering controls for lot formation and identification, inspections to be performed, inspection stations, sampling procedures, methods of inspection, (measuring and testing equipment), and provisions for control and disposition of nonconforming ma- terial.
15、 The written description will be con- sidered acceptable when, as a minimum, it provides the quality assurance provisions re- quired by the provisions of 4.2 and 4.3 and the other documents referenced herein. The contractor shall not be restricted to the in- spection station or the method or inspect
16、ion listed in this specification provided that an equivalent control is included in the approved t 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-N-474A 13 W 7799706 Oq34L7 O quality assurance procedure. In cases of dis- pute as to whether cer
17、tain procedures of the contractors system provide equal assurance, the comparable procedure of this specifica- tion shall apply. The contractor shall notify the Government of, and obtain approval for, any changes to the written procedure that affects the degree of assurance required by this specific
18、ation or other documents refer- enced herein, I 4.1.2 Subm.Lssedefined. . Major: AQL 0.40 percent 101. Foreign matter in nitroguanidine (see 3.4) Visual 102. Liner in- box cut, torn or punctured Visual 103. Check material (see 3.1) Visual 201. Liner in box missing or inadequate Visual 202. Insuffici
19、ent packing material Visual Minor : AQL 1.00 percent 4 Code No. (ses 6.3) O1001 01002 01003 01004 01005 Code No. 02001 02002 02003 02004 Cods No. 03001 03002 03003 03004 03005 1 f Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-tlIL-N-47YA 23 W 44799
20、06 0434274 4 W MIGN494A 4.2.2.4 Categories Criticai: Major: 101, Minor : 201. 202. 203. 4.2.2.5 Categories Critical: Major: 101. Minor : Fiberboard box sealed (see 5.1.2 and 5.2). Method of Defects impectm Code No. None defined. Box damaged Visual 04001 Contents loose Manual 04002 Marking misleading
21、 OP unidentifiable Visual 04003 Evidence of poor workmanship (see 3.4) Visual 04004 AQL 0.25 percent AQL 1.50 percent Container prim- to sealhg (see 5.1.3). Method of Defecta inspection None defined. Foreign matter in nitroguanidine (see 3.4) Visual None defined. AQL 0.26 percent 4.2.26 Container, s
22、enled (see 5.1.3 and 5.2). Categonea Defects Code No. 05001 Methnd of iturpection Code No. Critical : None defined. Major: AQL 0.25 percent Minor : 101. . Container torn, cut or punctured Visual 06001 201. Marking misleading or unidentifiable Visual 06002 202. Evidence of poor workmanship (see 3.4)
23、Visual O003 4.2.3 Sampling by lot, A random sample of containers shall be selected from each lot in accordance with the following table: TABLE III Lot Size Sample Size 1 batch 8 containers 2 batches 12 containers 3 ormore 16 containers batches When lots are composed of 8 containers or less each cont
24、ainer shall be sampled. 4.2.3.1 PrtymrutiiMt of composite. Equal pri- mary samples in sufficient quantity to total 16 ounces shal be removed from each con- tainer. The individual primary sampIes shall then becombined in order to form a homo- geneous composite sample of sixteen ounces and subjected t
25、o the tests specified in 4.3. If the composite sampIe fails to comply with any of the requirements specified, the lot shall be rejected. 4.3 The foliowing test methods and proce- dures shd be used. 4.3.1 Deteiminution of purity. Code No. 07001. The purity shall be determined by either the nitrometer
26、 method or the alter- native chromous chloride method. 4.3.1.1 Nitrometer method. The nitrometer method specified in Standard MILSTD-286, method 209.3 shall be used as the standard method for purity except that a 3 gram sam- ple shall be crushed so that it will pass through a U. S, Standard Number 1
27、00 sieve. A 1 gram sample shall be dried in air a 46“ Centigrade (O C.), overnight and then placed in an oven for 1 hour at 100“ C. The sample 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-N-474A 13 7777706 0434180 O M MIGN-494A shall then be
28、 transferred to the nitrometer. The percent nitrogen shall then be converted to percent nitroguanidine by the following formula: 7.430R w Percent Nitroguanidine = Where: R = reading of measuring tube W = sample weight 7.430 - correction factor 4.3.1.2 Chromous ChEonde Method. 4.3.1.2.1 Chromous Chlo
29、ride (0.2 Normal (N) StanduI 4OO-milliliter beaker. If necessary the solution shall be fil- tered through a No. 42 Whatman filter paper, or equal. The solution shall be made acid by the addition of 1 milliliter of concentrated hydrochloric acid, which shall be followed by the addition of 1 millilite
30、r of 10 percent bari- um chloride solution. The solution shall be boiled for approximately 5 minutes and then allowed to stand, With occasional gentle stir- rings, until cool. The solution shall then be allowed to stand for at least 10 hours. At the end of this period,. the solution shall be heated
31、to boiling and filtered through a previ- ously ignited and tared Gooch crucible equipped with a fine asbestos mat. The pre- cipitate shall be washed with small portions of warm distilled water, sucking each portion through before adding the next. The last few washings shall be tested with 1 percent
32、silver nitrate solution to see that all chlorides have been removed. When free of chlorides the Gooch crucible shall be tHnsferred to an oven maintained zit 100“ t 2“ C., followed by 1 hour in a muHe furnace, maintained at 600“ C. The crucible shaiI then be transferred to a desiccator until cod, and
33、 weighed. The percent sulfate present in the specimen shall be calculated to sodium sulfate as follows: 60.86A w Percent sodium sulfate = Where: A I weight of residue in gms. W - weight of*specimen in gms. 4.3.7 Dekmi and the fact that the Govern- ment may have formulated, furnished, or in any Custo
34、dians: Army-Munitions Command Navy-Bureau of Naval Weapons International Interest (see 6.4) MIGN494A way supplied the said drawings, specifications, or other data is not to be regarded by implication or otherwise as in any manner licensing the holder or any other person or corporation, or conveying
35、any rights or permission to manufacture, use or sell any patented invention that may in any way be related thereto. Preparing activity: Army-Mdtions Command Project Number: 11354435 %?U. S. GOVERNMENT PRINTING OFFICE: 65105i-1J6341418) 9. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
