1、I METRIC I MIL-S81246A(OS) 27 January 1988 SUPERSEDING 10 March 1965 MI L-S81246(WEP) MILITARY SPECIFICATION STABILIZER, ORGANIC-TIN-SULFUR This specification is approved for use within the Naval Sea Systems Command, Department of the Navy, and is available for use by all Departments and Agencies of
2、 the Department of Defense. 4 -. c,“ 1. SCOPE -, 1.1 Scope. This specification covers one type of stabilizing agent containing a tin mercaptide, specifically dibutyl tin beta mercapto proprionate. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specification and standards. The following spec
3、ifications and standards form a part of this specification to the extent specified herein. Unless otherwise specified, the issue of these documents shall be those listed in the issue of the Department of Defense Index of Specification and Standards (DoDISS) and supplement thereto, . cited in the sol
4、icitation. SPECIFICATIONS . FEDERAL RR-S-366 Sieves, Test MILITARY MI L-P-116 Preservation, Methods of , L . STANDARDS i MILITARY * MI L-STD-129 Marking for Shipment and Storage Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this d
5、ocument should be addressed to: Commanding Officer, Naval Ordnance Station, standardization Branch (3730), Indian Head, MD 20640-5000, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. i: is . AMSC NIA DISTRIB
6、UTION kTATEMENT A: .Approved for public release; distribution is unlimited. ._ FSC 6810 . - THIS DOCUMENT CONTAINS 7 PAGES. *- I . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_- _I _- - MIL-S-L24bA 68 W 9999906 0122737 W MI L-S81246A(OS) - 2.1.2
7、Other Government publications. The following other Government publication forms a part of this specification to the extent specified herein. Unless otherwise specified, the issue shall be that in effect on the date of the solicitation. PU B LI CATI O N S Code of Federal Regulations 29 CFR 1910.1200(
8、g) Hazard Communication (Application for copies should be addressed to the Superintendent of Documents, Government Printing Office, Washington, DC 20402.) (Copies of specifications, standards, and other Government publications required by manufacturers in connection with specific acquisition functio
9、ns should be obtained from the contracting activity or as directed by the contracting officer.) 2.2 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specification shall take precedence. Nothing in this specificat
10、ion, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified in the contract or purchase order (see 6.2), a sample shall be subjected to 3.2 Physical and chemical properties. The physical and chemical p
11、roperties of the material shall be as specified first article inspection (see 4.4 and 6.3) in table I. TABLE I. Physical and chemical properties I Property I Min i m u rn I Maximum I Tin content, percent by wight Sulfur content, percent by weight Melting point, degrees Celsius Particle size, percent
12、 by weight through a Number 40 U.S. Standard Screen 35.0 9.4 i15 36.0 10.0 135 - 3.3 Toxic products and formulations. The material shall have no adverse effect on the health of personnel when used for its intended purpose in accordance with the precautions cited in the Material Safety Data Sheet. Qu
13、estions pertinent to this effect shall be referred by the contracting activity to the appropriate departmental medical service who will act as an advisor tothe contracting agency (see 4.1.2). 3.4 Material safety data sheet (MSDS). The contracting activityshall be provided an MSDS at the time of cont
14、ract award. The MSDS shall be prepared in accordance with the requirements of 29 CFR 1910.1200(g), Hazard Communication, and included with each shipment. OSHA Form 174 MSDS or a more effective contractor developed MSDS format may be used. 3.5 Workmanship. The material shall be uniform in quality and
15、 shall be free from impurities and other defects that could adversely affect its use. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-8124bA b m 7777706 0322738 T m -. MI L-S-81246A(OS) a 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for i
16、nspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or purchase order, the Contractor may use his own or any other facilities suita
17、ble for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in this specification where such inspections are deemed necessary to assure that supplies and services conform
18、to prescribed requirements. 4.1.1 Responsibility for compliance. This item must meet all requirements of section 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall inspection system or quality program. The absence of any inspection requirements in
19、the specification shall not relieve the contractor of the responsibility of assuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling in quality conformance does not authorize submission of known defective materials, eith
20、er indicated or actual, nor does it commit the Government to acceptance of defective material. 4.1.2 Toxicological information. The contractor shall have the toxicological formulation and associated information available for review by the contracting activity to evaluate the safety of the material f
21、or the proposed use (see 3.3, 3.4, and 6.5). 4 - 5 4.2 Classification of inspections. The inspections of the material shall be classified as follows: a. First article inspection (see 4.4). b. Quality conformance inspection (see 4.5). 4.3 Sampling. 4.3.1 First article sample. A first article sample o
22、f sufficient quantity shall be selected to perform each of the first article tests detailed in 4.4 (see 6.3). 4.3.2 Quality conformance inspection sampling. Sufficient material shall be taken fromeach lot to perform the tests specified in 4.5. 4.3.3 Inspection lot. An inspection lot of stabilizer sh
23、all consist of all material presented for acceptance at one time and produced in a single manufacturing run under homogeneous conditions of manufacture. The minimum lot size shall be as specified in the contract (see 6.2). 4.4 First article inspection. The first article sample shall be subjected to
24、all the quality conformance inspections detailed in 4.5, at a Government activity designated by the contracting activity (see 6.2). Each test shall be performed in triplicate and the average of each set of three determinations shall be compared with the requirements of 3.2. 4.4.1 First article sampl
25、e acceptance or rejection. When the results of all the tests of section 4 show that the sample meets all the requirements of sections 3, the first article sample shall be accepted. Otherwise, the first article sample shall be rejected. 4.5 Quality conformance inspection. All quality conformance test
26、 samples shall be treated as first article samples (see 6.3). The test methods of 4.5 shall be used to determine that the requirements of this specification have been met. Any change in the test methods employed after acceptance shall have prior written approval of the contracting- activity. 4.5.1 V
27、isual examination. Visually examine all containers in the lot and their contents to determine compliance with 3.5 and Section 5. 3 - , . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIt-S-12!IbA b 377370b 0322737 I 4.5.2 Tin content test. Weigh be
28、tween 1.0 and 1.5 grams (9); to the nearet 0,l milligram (mg), of sample into a tared high-form porcelain crucible. Add 20 drops of fuming sulfuric acid (A,C.S. grade). Heat the crucible and allow the sample to char. Place the crucible in a muffie furnace and heat to a temperature of 10000 f 25O Cel
29、sius (OC) for not less than 33 minutes. Remo.ve the crucible from the furnace and allow it to cool to room temperature. Weigh the crucible and residue to the nearest 0.1 mg. Calculate the tin content s follows: Tin content, percent = W, x 78.764 w2 Where W, = Weight of stannic oxide residue, g . W2
30、= Weight of sample, g 4.5.2.1 Alternate tin content test. The tin content may be determined b by the acquiring activity. an alternate test method approved 4.5.2.2 Rejection. Failure to meet the tin content requirement of 3.2. shali cause rejection of the lot represented 4.5.3 Sulfur content test. Th
31、e following chemicals and reagents shall be used in this test: by the sample. Benzoic acid, A.C.S. grade, powder Sodium peroxide, CP, calorific grade, 95 percent, minimum Hydrochloric acid, concentrated; A.C.S. grade Sulfuric acid; A.C.S. grade, 10-percent aqueous solution Barium chloride, A.C.S. gr
32、ade, 10-percent aqueous solution Ammonium hydroxide, A.C.S. grade, reagent Potasium perchlorate, A.C.S. grade, powder . 4.5.3.1 Preparation of charge. Weigh a clean, dry 22-miliiliter (ml) Parr bomb (or equivalent) and add 0.5 + 0.059 of potassium perchlorate and 0.3 f 0.029 of benzoic acid. Add 0.3
33、0 to 0.359 of sample. Add a standard measure of sodium peroxide, and mix thoroughly with a glass or nickel stirring rod. CAUTION . Mixing with sodium peroxide should be performed behind a safety shield while wearing gloves . and a face shietd. , 4.5.3.2 Ignition of charge. 4.5.3.2.1 Flame ignition m
34、ethod. Place the lid onthe bomb and lock it. Place 1 to 2 mL of water in the depression on top of the bomb. Ignite the charge with a Meeker burner, setting the burner so that the hottest part of the flame strikes the bottom of the fusion cup. Shut off the burner when bubbles start to form in the wat
35、er or if the fusion cup is heated to a dull red color before the water shows any evidence of boiling. Allow the borhb to stand for approximately 2 minutes, then cool in water. Place the bomb behind a safety shield and untmkitiremotring cap. Place the bomb on its side in a 600-mL beaker containing ap
36、proximately 100 mL of distilled water. Warm.the water until effersvescence starts. Allow the beaker to cool and wait until effervescence stops, then remove. the bomb from the water. .- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-81246A 68 m
37、 9779706 0122740 A W MI L-L-81246A(OS) 4.5.3.2.2 Electric ignition method. Place the bomb head containing an ignition wire on the bomb cup and tap the cup gently on the bench a few times. Place the bomb cup in the bell body and tighten the screw cap. Place the assembled bomb under the ignition conta
38、ct arm in the water bath. Place a safety shield in front of the assembly then fire the bomb with the ignition unit. Allow the bomb to cool in the water bath for at least 5 minutes. Dismantle the bomb, remove the head and dip it into a 600-mL beaker containing approximately 100 mL of distilled water,
39、 previously heated almost to boiling. Wash with a fine jet of distilled water, previously heated almost to boiling receiving the washings in the beaker. Lay the fusion cup on its side in the same beaker of water and cover immediately with a watch glass. After the melt has dissolved, remove the cup a
40、nd wash thoroughly with water, receiving the washings in the same beaker. Allow the solution to cool. 4.5.3.3 Precipitation of barium sulfate. Add concentrated hydrochloric acid to the solution until it is slightly acid, using litmus paper as an indicator. Add concentrated ammonium hydroxide until t
41、he solution is slightly alkaline. Heat the solution to almost boiling. Filter and wash the filter paper with hot water, receiving the washings in the same beaker. Add concentrated hydrochloric acid to the filtrate until barely acid. Add 30 mi of barium chloride solution, drop by drop. Heat the solut
42、ion to boiling and allow it to stand overnight. Filter through a tared Selas, or Gooch, crucible. Wash the precipitate with a 10-percent aqueous solution of sulfuric acid, then wach with alcohol. Dry the crucible in an oven at 105 f 10C for 10 to 15 minutes. Place the crucible in a muffle furnace an
43、d heat to a temperature of not less than 800OC. Cool the crucible in a dessicator. Calculate the sulfur content as follows: Sulfur content, percent = W, x 13.738 w2 where W, = Weight of barium sulfate precipitate, g W, = Weight of sample, g 4.5.3.4 Alternate sulfur content test. The sulfur content m
44、ay be determined by an alternate method approved by the acquiring activity. 4.5.3.5 Rejection. Failure to meet the sulfur content requirement 3.2 shall cause rejection of the lot represented by the sample. 4.5.4 Melting point test. Fill a melting-point capillary tube with sample material to a height
45、 of 3 to 5 millimeters (mm). Attach the capillary tube to a thermometer so that the sample is at the mid-point of the bulb of the thermometer. Suspend the thermometer and capillary tube in a 400-mL beaker containing approximately 300 mL of silicone oil so that the level of oil is at the 51-mm mark.
46、Heat the oil while stirring constantly. When the thermometer indicates 105OC, heat the oil at a rate not greater than lC per minute. Record the temperature of the sample when liquid is first observed in the capillary tube and when the sample is completely liquid. 4.5.4.1 Rejection. Failure to meet t
47、he melting point requirement of 32 shall cause rejection of the lot represented by the sample. 4.5.5 Particle size test. Transfer approximately 100 g of sample weighed to the nearest 0.1 g to a Number 40 U.S. Standard Sieve in accordance with RR-S-366. Vibrate the sample for the five minutes. After
48、vibrating, transfer the material retained on the sieve to a tared waxed paper. Weigh the material to the nearest 0.1 g. Calculate the percent of material retained on the sieve as follows: Weight of material, percent = W, x 100 w2 where W, = Weight retained on sieve, g W2 = Weight of sample, g 5 Prov
49、ided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.5.5.1 Rejection. Failure to meet the particle size requirement of 3.2 shall cause rejection of the lot represented by the sample. 5. PACKAGING. (The packaging requirements specified herein apply only for direct Government acquisition.) 5.1 Preservation. Preservation shall be levels A, BI or Cl as specified (see 6.2). 5.1.1 Preservation, packaging. and packing. Unle
