1、DOD-S-82708 80 m 7779706 OLL0757 b m WS 14728 (See 6.3) MILITARY SPECIFICATION SEALING COMPOUND, PFTF (METRIC) This specification is approved for use by the Naval Sea System Comand, Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. 1. SOPE
2、 1.1 Scope. ?his specification covers two types of preformed sealing conpound for filling voids in a guided missile rocket mtor. 1.2 types 2 Classification. as specified (see 6.2) : ?he sealing compound shall be of the following Type 1 Extruded tape Type II Extruded bead 2. APPL1CABL;E mm 2.1 Cavern
3、mnt documents. 2.1.1 Specifications, standards, and handbooks. Unless otherwise specified, the following standards of the issue listed in that issue of the Department of Defense Index of Specifications and Standards (DODISS) specified in the solicitation form a part of this specification to the exte
4、nt specified herein. MILITATZY hjIGrn129 MIL-STD- 1218 Marking for Shipment and Storage AC3 Chemicals (Copies of specifications, standards, handbooks, drawings, and publications required by manufacturers in connection with specific acquisition functions should be obtained from the contracting activi
5、ty or as directed by the contracting officer.) Beneficial ments (recomendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Station, Standardization/bcumentation Division (524), Indian Head !.E) 20640 by using the self-addresse
6、d Standardization Ihcument Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. Cornanding Officer, Naval Ordnance Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-S-82708 80 W 7797706 0110758 8 W - J DoDs-82708(
7、 CH) 2.2 thes Publications. The following documents form a part of this specification to the extent specified herein. The issues of the documents which are indicated as DOD adopted shall be the issue listed in the current DODISS and the supplement thereto, if applicable. NATION this specification. o
8、f repsonsibility for furnishing material that confoniac to the specification. Approval to ship such material does not relieve the contractor 3.3 Workmanship. The material shall be uniform in quality, consistently applied to the paper backing, and free of impurities or any other defect that would pre
9、vent its use for the purpose intended. 4. QUALITY ASSURANa PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the Except as otherwise contract or purchase order, the contractor is responsible for the performance of all inspection requirements as specified herein. specified i
10、n 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. The Government reserves the right to perform any of the inspections set forth in the specificat
11、ion where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.2 Lat. A lot shall consist of material from one manufacturers lot produced without change in process or ingredients and offered for acceptance at one time. 4.3 Sampling. A representa
12、tive sample of each lot shall be selected for testing. 4.4 Quality conformance inspection. The material shall be subjected 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 obtdned for all insp
13、ections and tests performed and a certified statement that the lot meets al1 the requirements of this speci- fication. Unless otherwise specified, all chemicals shall be ACS grade in accordance with MILSTD-1218 and distilled water shall be used. applicable, blank determinations shall be run and corr
14、ections applied where significant. Where 4.4.1 Infrared spectrum. Infrared spectrum shall be detemined in accordance with the following: a. Procedure: Place approximately 2 gram (g) of sample into a beaker and add 10 to 15 ml of methylene chloride. minimum of 10 minutes. speed for approximately 15 m
15、inutes. solution on a clean sodium chloride plate and allow to evaporate until a tacky film is obtained. Adjust the film thickness to provide a spectrum where the minimum transmittance is between 2 and 20 percent at 3.4 microns. Scan the film from 2 to 15 microns on a double beam infrared spectro- p
16、hotometer using a blank sodiun chloride plate in the reference beam. Compare infrared spectrum with Figure 1. Let stand for a Decant the top layer and centrifuge at high Place sane of the clear, supernatant 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from I
17、HS-,-,-DOD-S-82708 80 m 0b OLL0760 b m DoD-S-82708(cxS) b. “accept“ or “reject“. 4.4.2 Ash content. the follaving: Reprt the results of a minimum of 1 dedennination as Ash content shal be determined in accordance with a. Procedure: Ignite a suitable crucible, cool in a desiccator, and weigh to the n
18、earest milligram (mg). of sample materia into the crucible and ignite with a Bwisen burner. Place into a muffle furnace at 8000 to 850Oc for a minimm of 2 hours or until ashing is complete. Remve the crucible and contents from the furnace, cool in a desiccator, andweigh to the nearest mg. b. Calcula
19、tion: Ash content (percent) = X 100 where A = original weight of sample, g B = weight of residue, g Weigh 7 to 10 g, to the nearest mg, A c. Report the average of a minimum of 2 determinations 4.4.3 Zinc chromate content. Zinc chromate content shall be detemiined in accordance with the following: a.
20、 -Reagents: (1) Sodiun carbonate, anhydrous (2) Sodim nitrate (3) Ligroin (4) Zinc chromate, purified (Fisher Scientific Co. U-35) b. Solutions: (I) Sodium carbonate solution, prepared by dissolving approx- imately 10 g of sodium carbonate in 500 ml of distilled water. (2) Zinc chromate solution, pr
21、epared by adding 0.100 g of zinc chromate and 0.500 g of a mixture of 10 parts by weight (pbw) sodim carbonate and 1 pbw sodiun nitrate into a suitable crucible. mixture until complete decomposition has been effected. to 40 ml of distilled water. Wet a number (No.) 42 filter paper with a small amoun
22、t of hot (60 to 8OOC) sodium carbonate solution. the mixture through the wet filter paper into a 100 ml volumetric flask. Wash the precipitate with sufficient sodium carbonate solution to bring to 100 ml volune. Mix well. Fuse the Leach with 30 Filter (3) Color standard solutions, prepared by adding
23、 0.002 g (2 ml), 0.004 g (4 ml), 0.006 g (6 mi), and 0.008 g (8 ml.) aliquots of the zinc chromate solution to four Nessler tubes and diluting each to 50 ml with sodiun carbonate solution. Mix well. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-D
24、OD-S-Z70 0 U 7777706 OlLO76L 0 DOD-S- 82 70 8( CE) c. Procedure: Place approximately 10 g of sample, weighed to the nearest rrg, (weight D) , into a previously weighed 180 ml centrifuge tube. Add approximately 40 ml of ligtmin and allow to stand for a minimm of 16 hours. washing in the tube. Add mre
25、 ligroin to nearly fill the tube. CentrifTe until the pigment is settled (approximately 30 minute). supernatant liquid. Add mre solvent, mix with a stirring rod, centrifuge, and decant for a minimm of four times. Set the tube on top of a wann oven for approximately one hour and then place in an oven
26、 at 105O to uoC, for appmximately 2 hours. pigment with a rod and place 1 to 2 g, weighed to the nearest rrig (weight GY) , into a previously weighed crucible. a mixture of 10 pbw sodiun carbonate and 1 pbw sodium nitrate. Fuse the mixture until complete decomposition has been effected. 30 to 35 ml
27、of distilled water. Transfer the cake to a small beaker and agitate with a rod to entirely disperse the sample. 95 percent ethyl alchol and heat to near the boiling point. a wet (see 4.4.3) (b) (2) No 42 filter paper into a Nessler tube. precipitate with sufficient hot sodim carbonate solution to br
28、ing the volune to 50 ml in the Nessler tube. Mix well. Compare the filtered sample solution with color standard chromate solution which mst nearly matches the sample solution. standard to the neareest 0.001 g (weight A). Mix thoroughly with a rod. Wash the rod with ligroin catching the Decant the cl
29、ear Cool in a desiccator agi! weiRh (weipht 3). ?fix tlae dhy Add five times the pigment weight of Leach the melt with Add a fav drops of Filter through Wash the - Record the weight of zinc chromate in the matched color d. Calculation: Zinc chromate (percent) = (W (Dl where: A = weight of zinc chrom
30、ate in matched colored D = original weight of sample, g E = weight of pigment after final wash, g W = weight of fused, washed pigment sample ,g standard, g . e. Report the average of a minimm of 2 deteminations. 4.4.4 Consistency. Consistency shall be determined in accordance with the following: a.
31、Procedure: Weigh 25 g of sample to the nearest 0.1 g. Fb11 the sample into a ball. Clean two glass plates approximately 0.8 x 82 x 101m in size) with a suitable solvent and wipe dry. Cbndition the ball and glass Plates for 120 f 5 minutes at 250 10 and 50 & 5 percent relative humidity. Place the sam
32、ple ball between the glass plates and apply a 4.54 kg weight evenly distributing the weight over the ball. 6.5 minutes L 10 second and before disassembly measure the greatest &-ter of the sample ball which is determined by measuring the wetted area on the glass. Wmve the weight after b. Report the a
33、verage of a minim of 3 determinations. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-S-82708 80 W 7797706 OLL0962 T W DOD-S-82708(OS) O O O O 8 O i3 O O 8 O O O d O O O v) O O z O O O N (lN33d) 33NVilIWSNVi 6 _. - Provided by IHSNot for Resal
34、eNo reproduction or networking permitted without license from IHS-,-,-DOD-S-82708 0 7777906 OLL0763 L = DOM- 82708( Cf3 ) 4.5 Packaging and marking inspection. The inspector shall ascertain that the packaging and marking conform to the requirements of this specification by visual examination. 5. PAC
35、XAGING 5.1 Packaging. 5.1.1 Conmercial. ?he material shall be packaged in accordance with the contrac&Fs best accepted comnercial practice. 5.2 Packing. 5.2.1 Cbmercial. Cbntainers shall mply with the National kbtor Freight Association Rules and the Uniform Freight Classification Rules or regulation
36、s of other carriers applicable to the mode of transportation. 5.3. Marking. Marking shall be in accordance with MIGSTD-lZ9, and shall include, but not be limited to, the following: a. Title, number, and revision letter of this specification b. Bianuacturers name and location c. Material trade name d
37、. Lot nmber e. Type of material and quantity in container f. Contract ntanber 6. NOTES 6.1 Intended use. The material covered in this specification is intended for use as a sealing coqxmnd for MK 12 lbd 1 rocket motor applications. 6.2 Ordering data. Acquisition docments should specify the following
38、: 6.2.1 Acquisition requirements. a. b. Place of delivery c. d. e. Title, nmber and revision letter of this specification Nominal width, length, and thickness of tape desired (Type I) Nominal length and diameter of bead desired (Type 11) Fkquest for test results (see 4.4 and 6.2.2) .- 7 Provided by
39、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_ DOD-S-82708 80 7777706 OlL0764 3 W DOD-S- 82708( CB ) 6.2.2 Data requirements. When this specification is used in an acquisition which incorporates a DD Form 1423, Contract Data Requirements List (CDRL), the data
40、 requirements identified below shall be developed as specified by an appmved Data Item Description (DD Form 1%4) and delivered in accordance with the approved CDRL incorporated into the contract. of DAR 7-104 (n) (2) are invoked and the DD From 1423 is not used, the data specified below shall be del
41、ivered by the contractor in accordance with the contract.or purchase order requirements. this specification is cited in the following paragraphs. When the pmvisions Deliverable data required by Paragraph Data Requirement Applicable DID 4.4 4.4 Test Report DI -T-2072 Certification data/Report DI-A-23
42、264 (&ta item descriptions related to this specification, and identified in section 6 will be appmved and listed as such in DOD 5OoO.l9L, Vol. II, AMSDL. in connection with specific acquisition functions should be obtained frmn the Naval Publications and Forms Center or as directed by the contractin
43、g officer . ) Copies of data item descriptions required by the contractors 6.3 Supersession infomation. DoD-S-82708(S) includes the requirements of and supersedes Naval Sea System Comand purchase description WS 14128, dated. 18 Jime 1973. Preparing Activity: Navy - OS 8 *US. GOVERNMENT PRINTING OFFICE: 1984-705-040/A0927 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
