1、DOD-D-2727 h W 7797906 0323258 L W Chicago, IL. 60606.) ( Industry association specifications and standards are generally available for reference from libraries. technical groups and using Federal agencies. ) They are also distributed among 2.3 Order of precedence. In the event of a conflict between
2、 the text of this specification and the references cited herein, the text of this specification shall take precedence. 3. REQUIREMENT 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection (see 4.4). 2 Licensed by Information Handling ServicesDOD-D-2727
3、b m 77777Ob O323260 T DOD-D-82727( OS) 3.2 Chemical and physical properties. The dibutyltin dilaurate shall meet the requirements of Table I. TABLE I. Chemical and physical properties. Property Tin content,$ Color, Gardner Requirement 17.7 - 19.5 4 ma. Acid number 130 - i80 Specific gravity 1.045 -
4、1.054 at 25OC. 3.3 Workmanship. The material shall be uniform in quality and free from foreign materials that could adversely affect its use. 4. QUALITY ASSURANCE PROVISIONS 4. I Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsibl
5、e for the perfor- mance of all inspection requirements as specified herein. otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government
6、. inspections set forth inthe specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. Except as The Government reserves the right to-perform any of the 4.2 Classification of inspections. The inspection requirements spec- ified her
7、ein are classified as follows: a. b. First article inspection (see 4.4). Quality conformance inspection (see 4.5) . 4.3 Inspection conditions. Unless otherwise specified (see 6.2) , 4.4 First article inspection. First article inspection shall be inspection conditions shall be as specified in the app
8、licable test method. performed by the contractor, after award of contract and prior to produc- tion, at a location acceptable to the Government. tion shall be performed on material which has been produced from raw materials with equipment and procedures normally used in production. First article ins
9、pec- . 3 Licensed by Information Handling ServicesmD-D-82727( OS) When specified in the conract (see 6.2), the contractor shall prepare a report giving the results obtained for all inspections and tests performed. Unless otherwise specified, all chemicals shall be ACS grade in accordance with MIL-ST
10、D-1218 and distilled water shall be used. Where applicable, blank determinations shall be run and corrections applied where signifdcant. contract under which it is granted, unless extended by the Government to other contracts. First article approval is valid on the 4.4.1 Sample size. 4.4.2 Inspectio
11、n routine. 4.4.3 Failures. Sample size shall be as specified in the contract (see 6.2). 4.6 plus any additional tests specified by the procuring activity (see 6.2). for first acticle rejections. The sample shall be subject to the tests of Failure of the sample to pass any test shall be cause .I 4.5
12、Quality conformance inspection. The material shall be subject to all the following inspections and tests for acceptance. When specified in the contract (see 6.2), the contractor shall prepare a report giving the results obtained for all inspections and tests performed and.a certified statement that
13、the lot meets all the requirements of this specification. otherwise specified, all chemicals shall be ACS grade in accordance with MIL-STD-1218 and distilled water shall be used. Where applicable, blank determinations shall be run and corrections applied where significant. Unless 4.5.1 sampling. 4.5
14、.1.1 - Lot. For the purpose of sampling, a lot shall consist of. material of a single form manufactured under one set of conditions from oae production batch and offered for delivery at one time. 4.5. I. 2 Sampling for examination of product. A random sample of. filled containers shall be selected f
15、rom each lot in accordance with YIL-STD-105, inspection level II. material to form the required tests shall be taken from each lot. 4.5.1.3 Sampling for tests. A representative sample of sufficient Tests shall be performed in accordance with the 4.6 Test methods. following methods. 4.6.1 Tin content
16、. The wet analytical method of 4.6.1.1 or the alter- nate instrumental mthod of 4.6. I. 2 m+y be used. 4.6. I .I Titrimetic method. 4 Licensed by Information Handling Services DOD-D-2727 b W 9979906 0323262 3 W Y DOD-D-82727( OS) 4.6. I . I .I a. b. Hot plate c. Meeker burner Apparatus and regents.
17、Erlenmeyer flasks, 500 millilters (mi) d. Concentrated sulfuric acid, c.p. reagent e. Fuming nitric acid, c.p. reagent f. Hyrochloric acid; 2.1 (this acid should be boiled to remove air and placed in a stoppered bottle for future analyses) g. Standard O. IN potassium iodate (prepared from water prev
18、iously boiled) . h. Potassium iodide, reagent IO percent solution (prepared from water previously boiled) i. j . Water, boiled to remove all air Starch solution (prepared from previously boiled water) k. Iron powder, 99 percent Fe hydrogen reduced 1. Nickel coils. piece of nickel sheet. ether and th
19、en place in HCI (2:l) and boil for about 5 minutes. and rinse with H20. Roll into loose coil a 6- by 3- by 0.015-inch Before using the first time, clean in petroleum Remove m. Perchloric acid (optional, but preferred). 4.6.1 .I .2 Proccjdre. 4.6.1 .I .2.1 Preparaioriofsamle. a. Weigh 0.4- to 0.5-gra
20、n (g) sample accurately to the nearest milli- gram (mg) via a I-ml syringe into a 500-ml Erlenmeyer flask. fuming nitric acid. Swirl. Add 50 ml of b. Add 20 ml of sulfuric acid. Swirl and add a few glass beads and I ml of perchloric acid. c. Place on hot plate set at high heat; allow to boil until d
21、ense white fumes of sulfur trioxide appear. Fume for 10 minutes. 5 Licensed by Information Handling ServicesDOD-D-2727 b = 777770b 0323263 5 M _ OD-D-82727( OS) d. Using crucible tongs swirl the flask over a Meeker burner and fume for I to 2 minutes. Solution should be colorless at this point. If no
22、t, add fuming nitric acid dropwise and bring to dense white fumes on hot plate. Repeat Meeker burner step. on hot place and evaporate the solution to heavy fumes of sulfur trioxide. e. Cool; wash down the sides of the flask with 30 ml of water. Place f Cool and repeat step g. Cool, add 80 ml of wate
23、r and 100 ml of 2:l hydrochloric acid and 100 ml of water in that order. 4.6.1.1.2.2 Reduction abd titration of tin. a. To the prepared solution, add a nickel coil and 5 g of iron Wash down the sides of the flask with water. Boil gently for about 20 minutes. powder. Swirl. b. c. d. Cool. Add a few p
24、ieces of Dry Ice. e. f. g. Calculation: Add 5 ml of starch solution, 5 ml of 10 percent potassium iodide. Titrate with potassium iodate to starch-iodine endpoint. Vol. X N.X 5.89 ut. of sainpie 5 Tin = Where: Vol. = milliliters OP potassium iodate used = normality of potassium iodate. M 4.6. I .2 In
25、strumental method, atomic absorption. 4.6.1.2.1 Apparatus. An atomic absorption spectrophotometer such as Varian Techtron AA-5 or Perkin-Elmer Model 303 equipped with an acetylene and nitrous oxide gas system or any equivalent atomic abosrption spectro- photome ter, 6 Licensed by Information Handlin
26、g Services DOD-D-2727 hl3 m 777770b 03232611 7 m DOD-D-82727(OS) 4.6. I. 2.2 Materials. ACS grade xylenes, dibutyltin bis (2-ethylhex- anoate) (Eastman 10427 for atomic absorption standards), atomic absorption lamp for tin; 4.6.1.2.3 Procedure. Method shall be that described .for !Tin in Organometal
27、lic salt in Varian Associates, Nanual !Analytical Yethods for Flame Spectroscopy.“ weighed accurately to O. I (mg) g per 1000 ml. dilution may be altered to better suit capabilities of a particular instru- ment with absorbency of the solution falling between 0.2 and 1.0. Sample weight shall be 0-6 g
28、 of dibutyltin dilaurate Final sample dilution shall represent 0.600 Standards and sample Wavelength shall be 286.3 nano-meters. . 4.6.2 Gardqer COor. Gardner color shall be determined in accordance with ASTM I) .- 5-44. - . . 4.6.3 .Acid riiimber. Weigh a 4- to 5g-sample to the nearest mg on an ana
29、lytical balance. (If a haze develops add an additional 25 ml of isopropanol.) Titrate to a phenolphthalein endpoint using l.aON KOH (pink color for at least 30 seconds). Dissolve in 250 ml of isopropanol and 50 ml of water. Calculate acid number as follows: ni1 KOH X riofid.iy X 56. I Acid number =
30、wt. of sample 4.6.4 Specific gravity. Specific gravity shall be determined in accord- ance with ASTM D 1963. 4.6.5 . Exaniinatiri of .product. The samples taken in accordance with 4.5. I .2 shall be inspected to verify compliance with the requirements of section 5 and other requirements of this spec
31、ification not involving tests. 5. PACKAGING 5.1.1 Comniercial. Unless otherwise specified, the material shall be packaged in accordance with the manufacturers best accepted commercial practice. 5.2. Packing 5.2.1 Commercial. Unless otherwise specified, the material shall be packed in shipping contai
32、ners in such a manner as to insure safe transportation by common carrier. Classification Rules and the Uniform Freight Classification Rules or- regulations of other carriers applicable to the mode of transportation. or purchase order, shipping containers shall be marked in accordance with the provis
33、ions of MIL-STD-I 29. Containers used shall comply with National ?!otor Freight 5.3 Yarking. In addition to any special marking required by the contract 7 Licensed by Information Handling ServicesDOD-D-82727( OS) 6. HOTEX 6.1 Intended use. The dibutyltin dilaurate covered by this specification is in
34、tended for use in the manufacturer of liner material for torpedo warheads -and plastic bonded explosives. I I 6.2 Ordering data. Acquisition documents should specify the following: 6.2.1 Acqiusition reqdirements. a. Title, number, and date of this specification b. Quantity desired c. d. e. f. g. h.
35、Inspection conditjions, if other than as specified (see 4.3) First article sample size, if required (see 4.4.1) Additional first article tests, if any (see 4.4.2) First article instructions regarding arrangements for examinations, test and approval Request for tests results and certificate (see 4.4,
36、 4.5 and 6.2.2) Any special marking required (see 5.3). 6.2.2 Data requirements. When this specification is used in an acquisition which incorporates a DD Form 1423, Contract Data Bequirements List (CDRL), the data requirements identified below shall be developed as specified by an approved Bata Ite
37、m Description (DD Form 1664) and delivered in accordance with the approved CDRL incorporated into the contract. IJhen the provisions of DAR 7-104.9 (n) (2) are invoked and the DD Form I423 is not used, the data specified below shall be delivered by the contractor in accordance with the contract or p
38、urchase order requirements. data required by this specification is cited in the following paragraphs: . Paragraph Daa Requirement Applicable DID Deliverable 4-4 4.5 Test report DI-T-2072 Certification data/report UDI-A-23264 (Data item descriptions related to this specification, and identified in se
39、ction 6 will be approved and listed as such in BOD 5000.19L, Vol. II, AMSDL. Copies of data item descriptions required by the contractors in connection with specific acquisition functions should be obtaaed from the Naval -Publications and Forms Center or as directed by the contracting officer,) Preparing activity: ?Taw-OS 8 (Project 681 O-NB40) Licensed by Information Handling Services
