ARMY MIL-A-166 C-1975 AMMONIUM PICRATE (EXPLOSIVE D)《苦味酸铵(爆炸性四)》.pdf
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1、MIL-A-LbbC 13 m 9999906 0290786 5 m MIL-A-166C 6 January i975 SUPERSEDING 28 August i968 AND MIL-A-00166B (MU) JAN- A- l 6 6A 31 October 1945 MILITARY SPECIFICATION AMMONIUM PICRATE (EXPLOSIVE D) .Thi%- shall also be submitted whenever there is a lapse in production for a period in excess of 90 days
2、 or whenever a change occurs in manufact iring process, materiaL used, drawing, specification or source of supply as to significantly affect product uniformity as determined by the Government. Prior to submission, the contractor shall inspect the sample to the degree necessary to assure that it conf
3、orms to the requirements of the contract and submit a record of this inspection with the sample. A sample containing known defects will not be submitted unless specifically authorized by the Contracting Officer. (see 6.1). subjected by the Government to any or all of the examinations or tests specif
4、ied in 4.3 and 4.4 of this specification and any or all requirements of the applicable drawings. 4.2.2 Inspections to be performed. The sample will be 4.2.3 Rejection. If any sample fails to comply with any of the applicable requiremepts, the first article quantity shall be rejected. its inspection
5、upon any failure of a sample to comply with any of the stated requirements. The Government reserves the Tight to terminate 5 Licensed by Information Handling ServicesMIL-A- i66c 4.3 Quality Conformance Inspection 4.3.i Lot formation. A lot shall consist of one or more batches of ammonium picrate pro
6、duced by one manufacturer in accordance with the same specification or same specification revision under one continuous set of operating conditions. Each batch shall consist of that quantity of ammonium picrate that has been subjected to the same unit chemical or physical mixing process intended to
7、make the final product homogeneous. The product shall be submitted for inspection in accordance with MIL-STD-105. The criteria and procedures for the assignment of lot numbers shall be in accordance with MIL-STD-1168. 4.3.2 Examination. Sampling plans and procedures for the following classifications
8、 of defects shall be in accordance with MIL-STD-105 (ABC-STD-105). Contractors sampling plans, if used, shall be approved by the Government and shall provide as a minimum, the protection afforded the Government by the sampling plans in MIL-STD-105. Continuous sampling plans in accordance with MIL-ST
9、D-1235 may be used if approved by the procuring activity. Also, at the option of the procuring activity, AQLs and sampling plans may be applied to the individual characteristics listed, using an AQL of 0.40 percent for each Major Defect and an AQL. of 0.65 percent for each Minor Defect . 4.3.2.1 Woo
10、den box or fiberboard carton, prior to closing (see Drawing (dwg) 7548644, 7548645). Categories Defects Method of Inspection Critical: None defined. Major:. AQL 0.65 percent 101. Liner pierced or torn.Visual 102. Liner improperly closed.Visual 103. Foreign materoOOOoOOOVisual Minor: None defined. 6
11、I ;- L. i_ Licensed by Information Handling ServicesLicensed by Information Handling ServicesTABLE III CLASSIFICATION OF DEFECTS Category Surface moisture and volatiles content Total moisture content Ammonium picrate purity Sulfates (as sulfuric acid) Chloroform soluble impurities Water insoluble ma
12、terial Irrant contaminants (as chlorine) Ash Acidity and alkalinity (as picric Color Granulation Bulk Density acid or ammonia) Defect Ma j or Major Maj or Major Maj or Ma3 or Major Maj or Ma j or Ma j or Maj or Major vernment reserves the right to inspect the contractors equipment and determine that
13、 he has available and utilizes correctly, measuring and test equipment of the required accuracy and precision and that the instruments are of the proper type and range to make measurements of the required accuracy. Commercial inspection equipment, shall be employed where applicable for all tests and
14、 examinations specified in 4.3 and 4.4, The contractor is responsible for assuring proper calibration procedures are followed. Government approval of all inspection equipment is required prior to its use for acceptance purpose. 40304 Inspection Equipment. .Th Licensed by Information Handling Service
15、sMIL-A-LbbC 13 7997906 0290794 4 MIL-A-166C 4.4 Test Methods and Procedures (see 6.3) 4.4.1 Moisture 4.4.1.1 Surface molsture and volatiles (applicable to class 1 only). An accurately weighed sample of approximately 5 g shall be transferred to a tared dish approximately 7 cm in diameter. The dish sh
16、all be shaken gently to distribute the sample evenly over the bottom. The dish shall be placed in an oven, maintained at 90 C 2 degrees Centigrade (OC) until the sample reaches constant weight (approximately 2 hours). The dish shall then be removed, cooled in a desiccator containing- anhydrous calci
17、um chloride and weighed. Determine the loss in weight, and calculate (by weight) the percentage of surface moisture and volatiles in the sample as follows: Percent surface moisture and volatiles = A x 100 B Where : A = Loss in weLght, in g B = Weight of sample, in g 4.4.1.2 Total moisture content (a
18、pplicable to class 2 only). The total moisture shall be determined in accordance with method 101.4 of MIL-STD-650, except methyl alcohol shall be used as the solvent . 4.4.2 Purity of ammonium picrate 4.4.2.1 Apparatus. Weight buret, self supporting, 10 ml capacity; Magnetic stirrer and teflon-cover
19、ed bar; Erlenmeyer flask, 125 capacity or i50 ml beaker; Analytical balance; Incadescent microscope lamp. 4.4.2.2 Reagents 4.4.2.2.1, 0.1 N perchloric-acetic acid; prepared by slowly adding 5.6 ml 70% perchloric acid to 21.5 ml acetic anhydride (swirl constantly and cool, while mixing in an ice bath
20、; maximum temperature 20C). Dilute resulting mixture with 250 ml. glacial acetic acid, mix and make up to 500 ml with more glacial acetic acid. Keep container tighly closed and do not use for 18 hours. 9 Licensed by Information Handling Services- 4.4.2.2.2 Crystal, violet indicator solution, prepare
21、d by dissolving 1.0 g of indicator in 100 ml glacial acetic acid. Keep container tightly closed. Weigh accurately 100 mg, to nearest O.lmg, of potassium acid phthalate in a beaker and add 100 ml of acetic acid and 1 drop of crystal violet indicator. Heat gently to dissolve and titrate immediately wi
22、th perchloric-acetic acid solution to a blue end point. Add titrant dropwise. Use microscope light shining through the solution to make a spot on a white background. Spot will change from pink to predominent blue at the end point. As endpoint approaches, the buret will deliver too much solution in o
23、ne drop, so drops must be split to prevent over running. A stainless steel spatula is a convenient means for splitting drops and adding them to the sample solution. Calculate the normality of the perchloric-acetic acid solution as follows: 4.4.2.3 Standardization of Perchloric-acetic acid solution.
24、Normality of perchloric-acetic acid solution = 204.2 X V titrant, in ml Use the average of triplicate values for final Normality of perchloric-acetic acid solution. 4.4.2.4 Procedure. Weigh accurately 100 mg, to nearest 0.1 mg, of the dried sample into a 250 ml pyrex beaker. Run samples in quadrupli
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