ARMY MIL-S-271 B-1962 STEARIC ACID TECHNICAL《工业硬脂酸》.pdf

1、MIL-S-ZLB LA m qwwb OLLL B m - .- MIL-S-271B 25 MAY 1962 -6 SUPERSEDING a MIL-A-271A 21 AUGUST 1951 MILITARY SPECIFICATION STEARIC ACID, TECHNICAL This specification has been approved by the Department of Defense and is man- datory for zcse by the Departments of the Awny, the Navu, and the Air Force

2、. 1. SCOPE STANDARDS 1.1 This specification covers Stearic Acid for use in loading ammunition and as a lub- ricant in the pelleting of explosives. 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date of invitation for bids form a part of this specification to the extent

3、 specified herein. SPECIFICATIONS FEDERAL PPP-D-723 - Drums, Fiber. PPP-D-729 - Drums, Metal, 55-Gal- Ion (For Shipment of Non-corrosive Material). FEDERAL Fed. Test STD No. 536 - Soap and Soap Products (Including Synthetic Detergents). Methods of Sampling and Testing. STANDARDS MILITARY MIGSTD-i05

4、- Sampling Procedures and Tables for In- spection by Attrib- utes. MIL-STD-109 - Inspection Terms and Definitions. MIGSTD-129 - Marking for Shipment and Storage. PPP-P-704 - Pails, Shipping, Steel PUBLICATIONS 1-through 12-gal- ORD-M608-11 - Procedures and Tables RR-Sa66 - Sieves, Standard Test- for

5、 Continuous UU-S-48 - Sacks, Paper, Ship- Sampling by Attrib- Ion. ORDNANCE CORPS ing. ping. utes. f THIS DOCUMENT CONTAINS tc:rtE: None defined. Major : AQL 0.25 percent 101. Weight of contents . Scale 102. Closure incomplete or dam- agzd to the extent that con- tents sift out Visual Minor: AQL o p

6、ercent . 201. Markings missing or uniden- tifiable . Visual 4.2.3 Testing. 4.2.3.1 Sarnplng by lot. A random sample of 10 containers shall be selected from each lot. When lots are comprised of 10 containers or less, each container shall be sampled. 4.2.3.2 Preparation of composite. A 1.0 -c-.2 ounce

7、 primary sample of stearic acid shall be removed from each of the 10 containers 4 in order to equal 10 ounces. If there are less i than 10 containers, equal primary samples in sufficient quantity to equal 10 ounces shall be removed from each container. The indivi- dual primary sample shall then be c

8、ombined in order to form a homogeneous composite sample of 10 ounces and subjected to the tests specified in 4.3. If the composite sample fails to comply with any of the requirements specified, the lot shall be rejected. 4.3 Test methods and procedures. The fol- lowing tests shall be performed as sp

9、ecified herein. 4.3.1 Grit. Dissolve approximately 50 grams (gm) of the sample in ether. Filter the solution using a Whatman No. 41 or equivalent filter paper and wash any residue with ether until the filtrate shows no evi- dence of dissolved stearic acid when a por- tion of it is evaporated to dryn

10、ess, Transfer the residue to a smooth glass slide. Press and rub the material on the glass with a smooth steel spatula. Grit is present if there is a persistent scratching noise, when the ma- terial is pressed and rubbed or when abrasion can be felt through the spatula during that action. 4.3.2 Tite

11、r test. This test shall be con- ducted in accordance with method 901 of Federal Test Method Standard No. 536. 4.3.3 Acidity. Melt approximately 25 gm of the sample in a test tube and add an equal volume of hot, neutral, distilled water. Shake the mixture thoroughly for 2 minutes. Allow the liquid la

12、yer to separate, cool to room tein- perature, filter using a Whatman No. 41 or equivalent filter paper and titrate the filtrate with approximately 0.01 normal alkali, using methyl orange as the indicator. The sample contains more than a trace of acidity if more than one drop of alkali is needed to c

13、hange the color of the solution. 4.3.4 Iodine number. The iodine number shall be determined in accordance with Method 1101.2 of Federal Test Method Stan- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MTL-S-271B 68 7977906 0113638 5 W. dard No. 53

14、6 except that a 10 gm sample and a 50-milliliter portion of chloroform for dis- solving the sample shall be used instead of the respective amounts of the material spe- cified in Federal Test Method Standard No. 5.1.2 Level C. Unless otherwise specified, stearic acid shall be packed in sacks con- for

15、ming to construction number 1OL/W of Specification UU-S-48, or fiber drums con- forming to type I, grade A of Specification 536. PPP-D-723. 5.2 Unless otherwise specified in the con- tract or order, each container shall be plain- ly marked in accordance with Standard MIL- -woximately 10 drying dish

16、ia contents. Dry for 4 to 55“ c. cool I STD-129. 6. NOTES eigh. Calculate me IOSS in weignt to percenr; moisture content of the sample. 6.1 Ordering data. Procurement documents should specify the following: (a) the title number, and date of this specification, (b) ._-.n. level of packing required. C

17、o Specification pan. Place an )ortion of the brush the ma- IIIU rdii brush for 5 L- -re. Repeat the 6.2 Intended use. The stearic acid covered by this specification is intended for use as a desensitizer and as a lubricant in the man- ufacture of ammunition. second sieve On each sieve Notice, When Go

18、vernment drawings, specifications, or other data are used for any purpose other than and calculate to Percent, Passing through in connection with a definitely related Government each of the sieves. procurement operation, the United States Govern- ment thereby incurs no responsibility not any obli- g

19、ation whatsoever; and the fact that the Govern- ment may have formulated, furnished, or in any supplied said drawings, specifictions, 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 any rights or p

20、ermission to manufacture, use, or seli any patented invention that may in any way be related thereto. Custodians: , DELIVERY 5.1 Packing. 1. Stearic acid shall be packed in 55-gallon capacity drums conforming to type III or IV of Specification PPP-D-729, nv F: mollfin nnnonitw nn:lo nnnf arming to type P-P-704, or in Army-Ordnance Corps. Navy-Bureau of Naval Weapons lg to 11 or 111, Preparing activity: I grade A of Specification PPP-D-723. Army-Ordnance Corps. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-