1、MIL-M-14779 (AR 1 AMENDMENT 3 23 November 1990 SUPERSEDING AMENDMENT 2 15 August 1988 MILITARY SPECIFICATION MAGNESIUM OXIDE, CALCINED (FOR USE IN AMMUNITION) This Amendment forms a part of Military Specification MIL-M-14779 (PA) dated 17 May 1968 and is approved for use within the US Army Armament,
2、 Munitions and Chemical Command, and is available for use by all Departments and Agencies of the Department of Defense. PAGE 1 1.1 Scope. Delete and substitute as follows: “This specification covers the requirements for two types of Calcined Magnesium Oxide - one type to be used in Aerial Mines, the
3、 other type to be used as an M864 propellant component.Il 2.1 Add the following under MILITARY MIL-B-117 - Bag, Sleeve and Tubing - Interior Packaging MIL-B-46506 - Box, Ammunition Packing, Wood, Wi rebound MIL-F-50449 - Filler, Sheet Form (For Use in Ammunition Co n t a i n e r s ) (1 2.2 Other pub
4、lications. Add the following: “AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) STM-D3951 - Standard Practice for Commerial Packaging ASTM-E300-73 - Recommended Practice for Sampling In dust r i al C hem i c als AMSC N/A -3 c 1 of 5 - DISTRIBUTION STATEMENT A. is unlimittd. Approved fOr.publlc rele
5、ase; distribution Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-14779 (AR) AMENDMENT 3 (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103).t1 Add the followi
6、ng new paragraph: “CODE OF FEDERAL REGULATIONS Title 49, Transportation, Parts 100-199“ Add the following new paragraph: “2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein (except for associated detail specifications, Specifica
7、tion sheets or MS standards), the test of this specification shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained.“ PAGE 2 3.1 Requirements. Add the following to the end of the par ag r aph : “For
8、 use as an XM864 propellant component, the material shall conform to the following requirements: Applicable - Property Min. Max. Paragraph Magnesium oxide, Calo ium bas is 88.0 - 4.3.5 Calcined basis - 1.0 4.3.4.3 calcination L 10.0 4.3.3. thru No. 325 Sieve 99.9 - 4.3.8 Mo is tur e - 0.5 4.3.10“ Ca
9、lcium oxide, Weight loss on Screen size (USS Sieve) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-14779 (AR) AMENDMENT 3 PAGE 5 c 4.2.2 Sampling. Add the following new paragraph: .k Il4.2.2.3 Sampling for M864 propellant component. Approxim
10、ately 500 grams of the composition shall be selected from each batch to be samples using ASTM Method E300-73 for solids. Samples shall be selected for inspection in accordance with table below. If any sample fails to meet any test requirement, the batch represented by the sample shall be rejected. E
11、ach required test shall be performed in duplicate. No composite samples shall be used. Number of containers Number of containers in batch to be sampled 2 - 200 Over - 200 2 5 (I ! LI PAGE 6 4.3.1.1 Reagents. Delete “anhydrous carbon tetrachloride“ and substitute “aliphatic naphtha“ . Add the followi
12、ng new paragraph: “4 . 3.4.3 Calcium oxide (for M864 propellant component). The calcium oxide shall be determined as follows: Dissolve 0.630 g of magnesium hydroxide and 0.4 g of magnesium oxide in a mixture of 3 ml of concentrated H SO and 22 ml of water. Add 50 ml ethyl alcohol and allow to stand
13、for a minimum of 16 hours. Warm to 50 degrees C and transfer the crystals of calcium sulfate to a Gooch crucible with an asbestos mat that has been washed with a 10% H SO solution, water, and ethyl alcohol and has been ignited to constant weight at 800 degrees C. Wash the crystals in the filter with
14、 a mixture of 2 volumes of ethyl alcohol and 1 volume of 10% H SO . Ignite the cfucible and contents for 30 min. at 800 degrees C. Cool and weigh. 24 24 24 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Calculations: Wt Ca0 = Weigh CaSO x 0.412 4
15、 Calcium oxide = wt Ca0 determined x 100 wt. samplef1 PAGE 20 Add the fallowing new paragraph: ll4.3. IO Moisture. (For M864 propellant component) Moisture content shall be determined as follows: Weigh approximately 20 g accurate to 0.1 mg of sample into a wide mouth, glass stoppered, low form dryi
16、ng dish (previously tared). Transfer to an oven at 105 degrees C. Dry for one hour. Remove from oven. Cool in a desiccator and reweigh. Calculation: % moisture = (A - B) x 100 A Where: A = Original sample weight B = Dried samplet1 5.1 Packing. Delete “Packing (see 6.5If1 and substitute llPackaging a
17、nd Packingll. 5.1.1 Drums. Delete ltDrumsll and substitute “Level Al1. Add the following to the end of the paragraph: IlThe drum shall now be placed in a barrier bag constructed from material conforming to Style 1, Type I, Class E, MIL-B-117. The bag shall be heat sealed. The bagged drum shall be pl
18、aced in a tight fitting, wirebound box conforming to Type I, Class 1, Grade A, MIL-B-46506. The box shall be lined with mandatory fillers conforming to MIL-F-50449. Use additional fillers as required for tight pack.# 5.1.2 Level C. Delete in its entirety and substitute the following: 115.1.2 Level B
19、 Level B packaging shall be the same as Level A, except the barrier bag and mandatory fillers shall be eliminated. However, continue to use fillers as required for tight pack. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-M-14777 (3) b m 9
20、94970b 04661113 O W MIL-M-14779 (AR) AMENDMENT 3 5.1.3 Level C. Unless otherwise specified in the contract or order, packaging and packing shall be in accordance with ASTM-D3951n, 5.2 Marking. In line 3, delete “Interstate Commerce Commission“ and substitute llDOTn. In line 4, delete “CFR 71-90t1 an
21、d substitute “CFR 100-199“. PAGE 21 6.1 Intended use. Delete llMinesn and substitute “Mines and M864 propellantt1 . 6.5 Delete paragraph 6.5 in its entirety. Add the following paragraph: “6.5 Material sources, Atlantic Solvent No, 49 manufactured by Arco Chemical Co., 260 South Broad St., Philadelph
22、ia, PA has been found satisfactory. The aliphatic naphtha (ARCO 49) produced by ARCO has the properties specified in Mellan, I, Handbook of Solvents, Reinhold Publishing Corp, New York,“ The margins of this amendment are marked with an asterisk or vertical lines to indicate where changes (additions,
23、 modifications, corrections, deletions) from the previous amendment were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluated the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous amendment, ( Custodian : Army-AR Preparing activity Army-AR (Project 681 O-AO501 i 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
