1、MIL-D-82710 13 = 777770b 03b2b58 b 5 -37 -15 MIL-D-82710(OS) DELAY 1. SCOPE DECEMBER 5, 1984 MILITARY SPECIFICATION COMPOSITION, TUNGSTEN-FLUOROCARBON COPOLYMER This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Depart- me
2、nts and Agencies of the Department of Defense. 1.1 Scope. copolymer delay composition. This specification covers one type of Tungsten-Fluorocarbon 1.2 Classification. This type of delay composition shall be of three classes depending upon the burning time ranges, as follows: Class I 2.5 to 7.5 sec/i
3、n at 24 2 4OC. Class II: 7.5 to 12.5 sec/in at 24 k 4C. Class III 12.5 to 32.5 sec/in at 24 k 4OC. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. Unless otherwise specified, the following specifications and standards of the issue listed in that issue of the Dep
4、artment of Defense Index of Specifications and Standards (DODIS3)Specified in the solici tation form a part ofthis specification to the extent specified herein. SPECIFICATIONS Federal 04- 51 PPP-B-601 PPP-B-621 Acetone, Technical Boxes , Wood, Cleated Plywood Box, Wood, Nailed and Lock Corner Benefi
5、cial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commanding Officer, Naval Ordnance Station, (5241, Indian Head, MD 20640-5000, by using the self-addressed Standardization Document Improve- ment Propos
6、al (DD Form 1426) appearing at the end of this document or by letter. .- / THIS DOCUMENT CONTAINS /+PAGES Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-827l10 13 W 7797706 0362659 8 W MIL-D-82710(OS) Military MIL-P-116 Preservation - Packagin
7、g, Methods of MIL-P-217 Potassium Perchlorate MIL-B- 550 Barium Chromate MIL-P-22264 Powders, Ignition, Gasless, A1A Naval Sea Systems Command os 8990 Diatomaceous Earth OS 9765 Boron-Potassium Nitrate WS 7682 WS 7692 n-Hexane Copolymer, Vinyliene Difluoride and Hexafluoropropylene Naval Air Systems
8、 Command AS 2686 Tungsten Metal Powder, Pyrotechnic STANDARDS Mi 1 it ary MIL-STD- 129 MIL-STD-1218 ACS Grade Chemical MIL-STD-1234 Pyrotechnics: Sampling, Inspection Marking for Shipment and Storage and Testing 2.1.2 Other Government documents, drawings, and publications. The following other Govern
9、menfdocumen-ts, drawings, and publications form a part of this specification to the extent specified herein. DRAWINGS Naval Sea Systems Command NAVORD 2249362 NAVORD 2249363 NAVORD 2249365 NAVORD LD 518765 Test Element Loading Assembly Delay Body Output Charge Holder Loading Assembly Test Element PU
10、BLICATIONS Naval Air Systems Command AD 1014 Operating Procedures for Pyrotechnic Delay Timing Apparatus Code of Federal Regulations 99 CFR 100-177 Transportation 49 CFR 178-199 Transportation. L * O 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
11、MIL-D-82310 13 m 7779706 0362660 Li I (Application for copies of the Code of Federal Regulations should be addressed to the Superintendent of Documents, Government Printing Office, Washington, D.C. 20404. Orders for this publication should cite “the latest edition and Supplements thereto.“) (Copies
12、of specifications, standards, drawings and publications required by suppliers in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer.) 2.2 Other publications. The following documents form a part of this specif- ica
13、tion to the extent specified herein. indicated as DoD adopted shall be the issue listed in the current DODISS and the supplement thereto, if applicable. The issue of the documents which are NATIONAL MOTOR FREIGHT CLASSIFICATION RULES (Application for copies should be addressed to the American Trucki
14、ng Assoc- iation, Inc., Traffic Department, 1616 P Street, NW, Washington, DC 20036.) UNIFORM FREIGHT CLASSIFICATION RULES (Application for copies should be addressed to the Uniform Classification Committee, Room 1106, 222 South Riverside Plaza Chicago, IL 60606). (Industry association specification
15、s and standards are generally available They are also distributed among technical groups for reference from libraries. and using Federal agencies. 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specificatio
16、n shall take precedence. - 3 o REQUIREMENTS 3.1 Description. The tungsten-fluorocarbon copolymer delay compositions shall be homogeneous mixtures of tungsten, barium chromate, potassium perchlorate, diatomaceous earth, and a fluorocarbon copolymer. 3.2 Materials. The materials used in the manufactur
17、e of the tungsten fluoro- carbon copolymer delay composition shall conform to the following: 3-2.1 Tungsten. The tungsten shall conform to AS 2686, Type II. These tungsten particle size ranges are considered most useful for the given burning time series. With proper adjustment of composition tungste
18、n percentage , any particle size close to the suggested range may be used to achieve the desired burning time. - Glass AS2686, Type II I Class 2 II Class 3 111 Class 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-827LO 13 I 999990b 03b2bbL b
19、 I 3.2.2 Barium chromate. The barium chromate shall conform to MIL-B-550, Grade A. 3.2.3 Potassium perchlorate. The potassium perchlorate shall conform to MIL-P-217, grade A, class 3. 3.2.4 Diatomaceous earth. The diatomaceous earth shall conform to OS 8990. 3.2.5 Flowocarbon copolymer. The vinylide
20、ne difluoride and hexafluoropropylene copolymer shall. conform to WS 7682. 3.2.6 Acetone. The acetone solvent shall conform to O-A-51. 3.2.7 Hexane, The hexane non-solvent shall conform to WS-7692. 3.3 Formulation. The material components of the tungsten fluorocarbon copolymer delay composition shal
21、l be homogeneously mixed. follows : Advisory formulation shall be as Ingredient Percentage ranges Nominal percentages Tungsten 25 - 75% Barium chromate 12 - 62% (As required) Potassium perchlorate Diatomaceous Fluorocarbon copolymer 7% 5% 1% In order to meet the specific burning tzme characreristics
22、 required, the percentage composition by weight of tungsten can be determined by pilot mixture (see 6.3.6) Figure 1 shows the effect of percentage tungsten on burning time. which conforms to the performance requirements of 3.4, 3.5, and 3.6 shall be considered in compliance with the formulation requ
23、irements. The composition 3.4 Burning time at 24 2 4OC. The burning time of the tungsten-fluorocarbon copolymer delay composition shall conform to the basic time and tolerance specified (see 6.2.1). composition is an average value ascertained under the provisions of 4.3.2. percent coefficient of var
24、iation (CV) of the observed burning times shall not be greater than shown below for the ranges indicated. The burning time of the tungsten-fluorocarbon copolymer delay The Class I II III Buming t Ime, sec /in 2.5 to 7.5 7.5 to 12.5 12.5 to 32.5 cv, % 10.0 7.0 5.0 3.5 Burning time at -54 2OOC. The bu
25、rning time shall not be increased by more than 15.0 percent when the initial temperature is changed to -54 2 2OC. visions of 4.3.3 shall be applicable in determination of low-temperature functioning. The percent coefficient of variation of observed burning time shall be as specified in 3.4 at all re
26、quired tempepatures. The pro- 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-27LO 13 I 7777706 0362662 8 m MIL-D-82710( OS) 3.6 Delay performance. There shall be no delay failures at room temperature or at the low temperature specified above
27、. ignition powder ignites butthe delay column does not burn through. .performance of 4.3.2 and 4.3.3 tests with no delay failures shall constitute conformance to this requirement. A delay failure shall be a condition where Satisfactory 3.7 Moisture content. The moisture content of the delay composit
28、ion shall not exceed.0.05 percent maximum when tested in accordance with 4.3.4. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspec- tion requirements as speci
29、fied herein. 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 Goverment. the inspections set forth in this specification where such inspections are deemed necessary to ass
30、ure supplies and services conform to prescribed requirements. Except as otherwise specified in the contract The Government reserves the right to perform any of 4.1.1 - Lot. A lot of tungsten-fluorocarbon copolymer-delay composition shall consist either of a manufacturers batch which has been mixed a
31、s a unit from the ingredients or a blend of one or more such batches offered for acceptance at one time. 4.1.2 Sampling, Sampling of the tungsten-fluorocarbon copolymer delay composi- tions for test purposes shall be performed following the last mixing operation and screening of the dried powder. 20
32、 equal parts so that 20 delay bodies may be so loaded that each delay body contains a representatLve sample from one of the 20 parts without duplication (see 4.3.2). A second representative pooled sample of the delay composition is selected of a sufficient quantity tc load a minimum of 10 test eleme
33、nts according to 4.3.2.1 for the low-temperature functioning test (4.3-3). or loading in delay assemblies shall be carried out in areas having a relative humidity below 60 percent. The samples shall be stored in hermetically sealed containers and correctly labeled to show the following information:
34、Each lot (4.1.1) to be tested shall be divided into All sampling prior to test loading (a) Name of item (b) Weight of sample (c) (d) Manufacturer (e) Date of manufacture Lot number of delay composition 4.2 Quality conformance inspection. The material shall be subjected to all the following inspectio
35、ns and tests for acceptance. When specified in the contract (see 6.21, the contractor shall prepare a report giving- the results obtained for ali inspections and tests performed. Unless otherwise specified, all chemicals shall be ACS grade in accordance with MIL-STD-1218 and distilled water shall be
36、 used. where significant. kihere applicable, blank determination shall be run and corrections applied 4.3 Test procedures. 4.3.1 Ingredient testing. All ingredients shall be tested in accordance with the applicable specifications and the exceptions taken in Section 3. Provided by IHSNot for ResaleNo
37、 reproduction or networking permitted without license from IHS-,-,-MIL-D-82710 13 m 777770b 0362bb3 T m MIL-D- 8271 O( OS ) 4.3.2 Burning time test for delay compositions. Conduct the test on the basis . .CL -CI of each lot as provided in 4.1.1. elements as provided in 4.3.2.1. and 20 delay bodies s
38、hall be loaded so that each delay body contains a repres- entative sample from one of the 20 parts without duplicati.on. The sample fog test shall consist of 20 test The lot shall be divided into 20 equal parts, 4.3.2.1 Loading of the test element. shall be loaded in accordance with Drawing 2249362.
39、 The delay body shown in Drawing 2249363 The tools required for loading appear in drawings under LD 518765. approxTmately 160 milligrams (mg) of A-1A ignition powder conforming to MIL-P-22264 OP 160 mg of a composition consisting of 80 percent A-1A ignition powder (MIL-P-22264) and 2 percent BKN03 i
40、gnition powder conforming to OS9765, type II, class 3 and shall be adjusted to be within the drawing limits (0.060 2 0.002 inch) for increment length when pressed at 30,000 1: 500 pounds per square inch. increment may be measured volumetrically by means of a scoop of such size as to give six approxi
41、mately equal increments- the loading funnel cap shall be loosened and tightened again. shall then be re-pressed to improve compaction and to minimize the danger of loss of powder by fallout. end of the delay element in which it is contained. by sliding the end of the test element over a hard cloth.
42、holder con-taitning the P2 charge shall be loaded in accordance with Drawing 2249365. The ignition increment P shall consist of Each After the last increment, D6 is pressed, The D6 increment The surface of the delay column shall be flush with the Excess powder may be removed The output charge 4.3.2.
43、2 Timing of test elements. Suggested directions for mounting components -.-_.- - into the delay body holder and assembling the test adapter are given in AD 1014. The temperature of the test elements for room temperature firing shall be 24O If detailed directions for testing at low and high temperatu
44、res are not specified for acceptance of the powder, the following procedure shall be followed: The testadapters shall be conditioned continuously for at least 2 hours at the required temperature before firing, 4OC. 4.3.2.3 Procedure for operating test apparatus. It is recommended that AD 1014 -C-L-.
45、-.-.- be used for operating instructions of the test apparatus. 4.3.2.4 Compute the burning time which is the average (X) of the time observations obtained in 4.3.2.2. The symbols and the method of computation shall be in accordance with Appendix A. Compute the percent coefficient of variation by di
46、viding (100) times (SI by X. Disposition of the lot shall be governed by 3.4 and 3.6. Where lot rejection is on the basis of the percent coefficient of variation, or 3.6, the lot may be remixed and resubmitted for acceptance under all provisions of 4.3. Computation of burning time and percent coeffi
47、cient of variation. Compute the standard deviation (S) of the time observations. 1- - - 4.3.2.5 Testing after shipment or prolonged storape. After the tungsten-fluo- rocarbon copolymer delay composition has been projerly mixed, it is possible for the fuel and oxidants to segregate under conditions o
48、f storage and transportation. Segregation appears to occur near the surface when a delay composition is subjected to prolonged agitation, particularly during shipment by rail. The surface layer is then nonhomogeneous andnot representative of the composition of the lot. shipment of a lot of the delay
49、 composition or after storage of. the lot for longer in 4.3.2. If the lot fails to meet the requirements of 3.4 then the lat shall be remixed to restore uniformity prior to test and use. of 4.3.2 shall be followed tc ensure representative sampling of the lot. After than 3 rronths, the lot should be reevaluated according to test procedures outl.ined I In all testing, the provisions Provided by IHSNot for ResaleNo reproduction or networking permitted without lice
