1、MIL-M-14779 (MU) 17 May 1968 MILITARY SPECIFICATION MAGNESIUM OXIDE, CALCINED (FOR USE IN AMMUNITION) 1. SCOPE 1.1 This specification covers the requirements for one type of calcined magnesium oxide to be used in Aerial Mines. 2. APPLICABLE DOCUMENTS 2.1 The following documents, of the issue in effe
2、ct on date of invitation for bids, form a part of this specification to the extent specified herein. SPECIFICATIONS FEDERAL PPP-D-723 - Drums, Fiber STANDARDS MI LI TARY MIL-STD-105 - Sampling Procedures and Tables MIL-STD-109 MIL-STD-129 - Marking for Shipment and Storage for Inspection by Attribut
3、es (ABC-STD-105) - Quality Assurance Terms and Definitions (Copies of specifications, standards, and drawings required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 2.2 Other publications,-T
4、he following documents form a part of this specification to the extent specified herein. Un- less otherwise indicated, the issue in effect on date of invitation for bids shall apply. FSC: 1345 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-14
5、77 9 (MU) CODE OF FEDERAL REGULATIONS 49 CFR 71-90 - Interstate Commerce Commission Rules and Regulations for the Transportation * of Explosives and Other Dangerous Articles (Application for copies should be addressed to the Superintendent of Documents, Government Printing Office, Washington 25, D.C
6、. Orders for copies should cite “49 CFR 71-90 (Revised, 1956) .I) CONSOLIDATED CLASSIFICATION COMMITTEE CONSOLIDATED FREIGHT CLASSIFICATION RULES (Application for copies should be addressed to the Consolidated Classification Committee, 202 Chicago Union Station, Chicago 6, Ill. ) AMERICAN TRUCKING A
7、SSOCIATIONS NATIONAL MOTOR FREIGHT CLASSIFICATION (Application for copies should be addressed to the National Classification Board, 1424 Sixteenth Street, Washington 6, D.C.). 3. REQUIREMENTS 3.1 The material shall be Maqnesium Oxide which conforms to the following requirements: PROPERTY Min. Max. M
8、agnesium, as magnesium oxide 97.2% - (Mg0 1 - Calcium, as calcium oxide (Cao) Silica, as silica dioxide (Si02 1 Iron, as iron oxide, (Fe2031 Aluminum, as aluminum oxide (A1203 1 Loss on ignition - 1.00% O. 34% - - O. 18% - O. 15% 10.0% Iodine Nuniber, m.e.q./100 grams 85 Bulk density, loose 8.0 lb/f
9、t3 Screen Size: Passes 325 mesh, wet 99.5% Passes 200 mesh, wet 99.8% Applicable Para. 4.3.5 4.3.4 4.3.6 4.3.2 4.3.9 4.3.3 4.3.1 4.3.7 4.3.8 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-1q777 13 7777706 027b765 5 MIL-M-14 7 7 9 (MU) 3.2 Wo
10、rkmanship.-The magnesium oxide shall be a fluffy, white powder and shall be free of lumps and foreign matter. 4. QUALITY ASSURANCE PROVISIONS 4.1 General quality assurance provisions.-Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all
11、 inspection requirements as specified herein. Except as otherwise specified, the supplier may utilize his own facilities or any commercial laboratory accept- able to the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspecti
12、ons are deemed necessary to assure supplies and services conform to prescribed requirements. be made to Standard MIL-STD-109 in order to define the terms used herein. Reference shall 4.1.1 Contractor quality assurance system.-If the contractor desires to utilize a quality assurance system, which is
13、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 production. It shall include a description covering controls for lot formation an
14、d identification, inspections to be performed, inspection stations, sampling procedures, methods of inspection, (Measuring and Testing equipment), and provisions for control and disposition of non-conforming material. The written description will be considered acceptable when, as a minimum, it provi
15、des the quality assurance provisions required by the provisions of 4.2 and 4.3 and other documents referenced herein. The contractor shall not be restricted to the inspection station or the method of inspection listed in this specification provided that an equivalent control is included in the appro
16、ved quality assurance procedure. procedures of the contractors system provide equal assurance, the comparable procedures of this specification shall apply. The contractor shall notify the Government of, and obtain approval for, any changes to the written procedure which affect the degree of assuranc
17、e required by this specification or other documents referenced herein. In cases of dispute as to whether certain 4.1.2 Submission of product.-At the time the completed lot of product is submitted to the Government for acceptance the contractor shall supply the following information accompanied by a
18、certificate which attests that the information provided is correct and applicable to the product being submitted: 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-LLI777 13 M 7777706 0296766 7 = MIL-M-14779 (MU) a. A statement that the lot com
19、plies with all requirements b. Specification number and date, together with an c. and provisions of the approved current written description of the material. identification and date of changes. by the contractor when such material is controlled by Government specification, shall be made available up
20、on request by the contracting officer. Certificates of analysis on all material used directly d. Quantity of product in the lot. e. Date submitted. The certificate shall be signed by a responsible agent of the certifying organization. The initial certificate submitted shall be substantiated by evide
21、nce of the agents authority to bind his principal. not be required with subsequent certificates unless, during the cource of the contract, this authority is vested in another agent of the certifying organization. Substantiation of the agents authority will 4.1.3 First article inspection 4.1.3.1 Subm
22、ission.-The contractor shall submit a first article quantity as designated by the contracting officer for evaluation in accordance with the provisions of 4.1.3.2 (see 6.1). The first article sample shall consist of 500 grams of the material selected randomly in a manner similar to the method describ
23、ed in 4.2.2. The sample submitted shall have been produced by the contractor (or furnished by a supplier) using the same production processes, procedures, and equipment as will be used in fulfilling the contract. All materials, including packaging and packing, shall be obtained from the same sources
24、 of supply as will be used in regular production. accompanied by certificates of conformance. A first article quantity, 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
25、occurs in manufacturing 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 conforms to the requirement
26、s 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. The sample shall be 4.1.3.2 Inspections to be performed.-The sample will be subjected by the Government to any
27、or all of the examinations or tests specified in 4.2 and 4.3 of this specification and any or all requirements of the applicable drawings. 4 . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-14777 13 7777906 027b767 7 MIL-M-14779 (MU) 4.1.3.3 R
28、ejection.-If the sample fails to comply with any of the applicable requirements, the first article quantity shall be rejected. The Government reserves the right to terminate its inspection upon any failure of a sample to comply with any of the stated requirements. In the event of rejection, the Gove
29、rnment reserves the right to require the contractor to take corrective action and submit a new first article quantity or portion thereof. quantity is accepted, the contractor is in no way authorized by the Government to resume regular production unless otherwise directed by the Contracting Officer.
30、4.2 Inspection provisions 4.2.1 Lot formation.-A lot of magnesium oxide shall consist Until a first article of that quantity produced, by one manufacturer, in not more than 24 consecutive hours of continuous production, with no change in facilities, materials, process or specifications which would c
31、hange the chemical or physical properties of the composition, In the event the process is a batch operation, each batch shall constitute a lot. The product shall be submitted for inspection in accordance with Standard MIL-STD-105. 4.2.2 Sampling 4.2.2.1 Primary samples.-Ten percent or a minimum of 2
32、5, whichever is less, of the containers comprising each lot submitted shall be selected at random. A representative one-pint sample from each selected container shall be taken in the following manner: Insert a closed sampler tube to maximum depth, at an oblique angle, then open and agitate to fill t
33、he tube. Each sample shall be placed in a clean, dry, glass jar, which shall be labeled to identify the container, lot number, contract number, and material name. 4.2.2.2 Composite samples.-The primary sample shall be divided into two groups of equal size, and a composite sample shall be prepared fr
34、om each group. Each composite sample shall be placed in a clean, dry container, sealed, and labeled in a manner that will identify the sample with the contract number, material name, containers, and lot represented. Each composite sample shall be subjected to all chemical and physical tests specifie
35、d. If either sample fails to meet the requirements specified in 3.1, the lot shall be rejected. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-Lq779 13 9999906 0296768 O I MIL-M-14779 (MU) 4.3 Test Methods and Procedures NOTE: Any deviations
36、 from the test procedures specified herein shall require prior approval by the procuring activity. 4.3.1 Iodine number, Major defect, Defect Code No. O1001 4.3.1.1 Reagents: Iodine solution in anhydrous carbon tetrachloride, A.C.S. reagent grade, 0.10 normal (NI solution. solution, 0.10N. percent et
37、hanol, 0.03N. gravity fed from iodine solution reservoir equipped with a drying tube on the air inlet. or equal. Standard sodium thiosulfate Potassium iodide solution in 75 4.3.1.2 Apparatus: Automatic pipette, 100 ml, Burrell “wrist-action“ shaker, Pipette, 20 ml, stopcock-type. To maintain adequat
38、e accuracy and precision in this method, which is dependent on the measurement of the differences between two relatively large quantities, follow closely the prescribed details of technique, which are designed to minimize the intro- duction of moisture from the atmosphere and from absorbed films on
39、glassware, and to avoid uncompensated absorption of iodine on glass surfaces. Glassware must be cleaned with acid to remove minute deposits of basic magnesium compounds. The determination shall be made as follows: Weigh rapidly a 2.0 gm sample and transfer the sample quantitatively, through a powder
40、 funnel, into a 100 ml cylinder. with 0.10N iodine solution and discard the rinse. refill the pipette, and add 100 ml of the iodine colution to the sample. sample. The rinse need not be repeated if the solution is added to subsequent samples without delay. Secure the glass stopper in each cylinder w
41、ith a clip, and center the cylinder horizontally in the mounting clamp on the shaker. Shake the cylinder at maxi- mum rate for 30 minutes, remove from the shaker, and allow the contents to settle for 10 minutes. From the top third of the clear supernatant liquid in each cylinder, transfer a 20 ml al
42、iquot, using a clean, dry stopcock pipette (the pipette may be air dried with a rubber bulb between determinations) to a 250 ml Erlenmeyer flask, or equal, containing 50 ml of 0.03N alcoholic Rinse the automatic pipette Immediately Prepare a blank to be run in parallel with the 6 Provided by IHSNot
43、for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-Lq779 13 a 7777906 0276767 2 = MIL-M-14779 (MU) potassium iodide solution, and titrate with standard 0.10N sodium thiosulfate. 4.3.1.3 Calculation: Calculate the iodine number (mg-equivalent per 100 gm) as follows:
44、Iodine number = 5 (A-B) N (100) W Where : A = ml sodium thiosulfate solution used for blank. B = ml sodium thiosulfate solution used for sample. N = normality of sodium thiosulfate solution. W = weight of sample, gm. 4.3.2 Iron, as iron oxide 4.3.2.1 Iron oxide, Major defect, Defect Code No. 02001 4
45、.3.2.1.1 Reagents: H2SO4 solution, Reagent grade, 50 percent. Hydroxylamine hydrochloride, 10 percent, freshly made. O-Phenanthroline solution, 0.25 percent. Sodium citrate, Reagent grade, (Na3C6H507.2H20) 25 percent solution. HC1, Reagent grade, concentrated Nitric Acid (HNO3), Reagent Bright iron
46、wire, primary standard grade, concentrated. grade. 4.3.2.1.2 Apparatus: Beckman spectrophotometer, Model DU, or equal, with 3 matched lcm corex cells, set up for use with tungsten lamp and red sensitive phototube, without filter. Determination of the absorptivity shall be made as follows: Weigh accu
47、rately 0.05 gm of bright iron wire (an equivalent weight of any other recognized primary standard, with.appropriately modified preparation procedure, may be substituted for the iron wire standard) and place it in a 1 liter volumetric flask, add 2 ml of concentrated HC1 and a few ml of hot distilled
48、water. When all the iron is dissolved, fill the flask to volume, and mix. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-14779 (MU) Transfer 1.00, 3.00, 5.00, 7.00 and 9.00 ml portions of the standard iron solution to a series of 100 ml volu
49、metric flasks, and prepare a blank. Dilute each to approximately 70 ml and determine the absorbency (As) by the procedure described below for analysis of the sample. The initial calibration should consist of four complete determinations, two on each of two days, preferably one by each of two analysts. The calibration should be checked by two additional single determinations for each new bottle of solid O-phenanthroline reagent. Calculate the c
