1、i5 February 1974 SUPERSESSION (see 6.4) MILITARY SPECIFICATION PYROTECHIJI C FIRST-FIFE COMPOSITIOIJS This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 This specification covers three types of non-hygroscopic first fire compositions (se
2、e 6.1). Type I - yellow Type II - red Type III- green 2 APPLICABTJ3 DOCUMEIJTS 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 specified herein. SPECIFICATIONS MI LIT A RY MIL-B-162 - Barium Nitrate MIL-S-230 - Silicon
3、, Powdered MIL-A-2550 General Specification for MIL-13723 - Tetranitrocarbazole (?JI(=) MIL-P-20307 - Polyvinyl Chloride (For Use in Pyrotechnics) MIL-S-20322 - Strontium Nitrate, Non-Hygroscopic - Ammunition and Special Weapons, STANDARDS MLITARY FSC: 1370 THIS DOCUMENT CONTAINS - / of Amiunition I
4、UL-STD-12 3 4 - Py ro t e chr i cs : S anip lint, L,a?e c t i on - an8 Testing NIL-STD-3-2 35 - Sinsle aid r-ulti level Continuous , Sampling Procedures and Tables for Inspection by At tributes (Copies of specifications, standarc?s, d.rawkss, and phlications required by contractors in connection v5t
5、3 specific procure7icnt, functions should be. obtained fron; the procarinf; activity or as directed by the contracting offlcer. ) 3. 3.1 Xaterial. The raw materials use2 fn tfie mnufacture of first-fire coniposition shall cornply with the requirements of the applicable documents . The follo:lriilti;
6、 naterialo shell be of the size and gracie specifiee. 3.1.1 Barium nitrate. The barium nitrate shall comply trith the requirements of Specification T:ITJ-3-162, except that the average particle size shall be twenty(29) r?-crons, na.ximum. 3.1.2 Strontium nitrate. !?he strontiun nitrate shall comply
7、with the requirements of Specification MIL-S-20322, Grade A or E, 3.1.3 Silicon. The silicon shall Se pot;?ered and 11 comply with the requirements of Speclficatlon :?IL-E- 239, except that the average particle size shall be 10 microns, maximm. 3.1.4 Tetranitrocarbazole. The tetrmitrocarhazole shall
8、 comply with the requirements of Specification TTIL-Y-lz723. 3.1.5 Polyvinyl chloride. The polyvinyl chloricle shall 3.2 Composition. The first-fire composition shall .be comply with the requirements of XIL-P-20307. as specified in Table I. 2 Provided by IHSNot for ResaleNo reproduction or networkin
9、g permitted without license from IHS-,-,-.iIL-P-48240 (PA) TABLE I Percent by weight Firs t-fire composition Type 1 Type II Type III - 50 + 2 Barium nitrate 50 - + 2 e (non-hygroscopic) - 50 + 2 - Tet ranit rocarb azole (TNC 10 + 1 10 T 1 10 + 1 (comercial) 15 2 1 i5 + 1 20 + 1 (see note) 5 + 0.5 4.
10、+ - 0.5 4 - + (7.5 St ront lm nitrate Si li con, powdered 20 - T 1 16 1 13 E 1 Zirconium hydride Polyvinyl ch lori de - 5 T - 0.5 3 T - 0.5 Laminac 4116 + 1 percent Lupersol DDM catalyst (1Jote: Luperso Di117 catalyst is a 6Q percent solution of methyl ethyl ketone peroxide in dimethylphthalate) 3.3
11、 Moisture content. The moisture content of the first-fire composition shall be not more than 0.1 percent. 3.4 Burning rate. The burning rate of the first-fire compos?.t ion shall be as follows : Type I Type II Type III Burning rate inches /minut e 521 3.5 Color of composltion. The color of each comp
12、osltion shall be as follows: Type II Type III n ype I Color yellow red green 3.6 First article inspection. This specification makes provisions for first article testing. Requirements for. the submission of first article samples by the contractor shall be as specified in the contract. 3 Provided by I
13、HSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-P-48240 13 7797906 0337773 3 M MIL-P-48240 (PA) ._. . . -I I. 4. QUAIJTY ASSURATqCE PROVISIOIJS 4.1 Responsibility for inspection. Unless othamqise specified in the contract Or purchase order, the is responsible
14、 for the performance Of all inspection reqirements as specifled herein. contract or order, the supplier may use his own or any Other facilities suitale for the performance Of the insPCtion requirements specified herein, unless disaPProved by the Government. The Government reserves the right to Perfo
15、rm any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. Reference shall be made to MiL-STD-iOg to efine terms used herein. lot of itens deliverable under the contract is submitted to the
16、Government for acceptance, the contractor shall supply the following information accompanied by a certificate which attests that the information provided is correct and applicable to the product being submitted: a. A statement that the lot complies with all of the quality assurance provisions specif
17、ied in this specification. b. Specification number and date, together with identification and date of changes thereto. C. Certificates of analysis on all materials used directly by the contractor when such materials are controlled by Government specifications shall be nade available upon request by
18、the Contracting Officer. d. Quantity of product in the lot. e. Date submitted. The certificate shall be signed by a responsible agent of the CertifYing organization. The initial certificate submitted shall be substantiated by evidence of the agents authority to bind his principal. Substantiation of
19、the agents authority Will not be requred with subsequent certificates unless, during the course of the Contract, this authority is vested in another agent of the certifying organization. Except as otherwise specif.f_ed in the 4.1.1 Submission of product. At the time each completed 4.2 First article
20、inspection 4a2*1 Submission. Prior to the start of regular production the contractor shall submit a first article smple (set? 6.3) to a Government approved facility as designated by the contracting 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MI
21、L-P-48240 33 W 9977706 0337779 3 = MIL-P-48240 (PA) officer for evaluation in accordance with the Provisions of. 4.2.2. The first article shall consist of eight(8) of flrfft-fire composition in accordance with instructions issued by the Contracting Officer. All samples submitted shall have been prod
22、uced by the contractor using the same production processes, procedures, and equipment as will be used in fulfilling the contract. All materials, including packaging and packing, shall be obtained from the same sources of supply as will be used in regular production. be accompanied by certificates of
23、 analysis. A first article quantity, or portion thereof, as ciirected by the Contracting Officer, shall also be submitted whenever there is a lapse in production for a period in excess of 90 days, or whenever a change occurs in manufacturing process, material used, drawing, specification or source o
24、f supply as to significantly affect product uniformity as determined h:r the Government. Prior to submission, the contractor shall inspect the saqle to the degree necessary to assure that it conforms to the requrremen of the contract and submit a record of this inspection with the sawle. submitted u
25、nless specifically authorized by the Contracting Officer. , ounces The sample shall A sample containing knourn defects will not he 4.2.2 Inspections to be performed. The smple will be subjected by the Government to any or all of the examinations or tests specified in 4.4 of this specification. 4.2.3
26、 Rejection. If any sanple fails to cornply with any of the applicaSle requirenents, the first article quantity shall be rejected. the right to terminate its inspection upon any failure of a sample to comply with any of the stated requirements. The Government reserves 4.3 Inspection provisions 4.3.1
27、Lot formation. A lot shall consist of one or more batches of first fire composition produced by one maniifact in accordance with the same specification, or same specification revision, under one continuous set of operating conditions. Each lot shall consist of that quantity of first fire composition
28、 that has been subjected to the sale unit chemical or physical mixing process intended to make the final product homogeneous. The product shall be submitted for inspection in accordance with NIL-STD-105 (or KIL-SmD-1235 when applicable). The criteria and procedures for the assignment of lot numbers
29、shall be in accordance with MIL-STD-1168 . ts urer, p 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-Lt240 13 7777706 0317775 5 MIL-P-48240 (PA) 4.3.2 Testing 4.3.2.1 Sampling. For the tests given in 4.4.1 thru 4.4.5 the containers in the lo
30、t shall be divided into two (2) equal size groups. For each of these rouPs an individual sample shall be prepared in such a manner that the sample obtained is truly representative of the contents of the containers sampled. Randomly select containers for sampling in accordance with MIL-SmD-105. Howev
31、er, il each group contains less than five (5) containers, select all containers for sampling. Withdraw, approximately, equal portions of the. powder from each selected container, in such quantity that the aggregate weight of the portions of the samples shall be approximately 200 grams. Use the metho
32、d described in ASTI E300 for solids for withdrawing the samples. Combine these portions and thoroughly mix. Perform the tests given in 4.4.1 thru 4.4.5 on the two samples formed. If either sample fails to meet the specified requirements in Section 3, the lot shall be rejected. The classification and
33、 code numbers for the tests shall be as follows: TABLE II Test Requirement Test Defect Code No 0 De t e rmh at i on Method C lassi f i cation of Composition 3.2 404.1 4.4.6 Ma j or O1001 Moist Ure Content 3.3 4. 5 r4a j or 01002 Burnine Rate Color De termhat ion of raw materials 3.1 thru 3.4 4.6 Ma
34、j or 03001 3.5 4.7 Naj or 04001 4.8 Major O5001 4.4 Test method and procedures. The tests in 4.4.1 thru 4.4.5 shall be performed using prescribed analytical 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-48240 (PA) procedures for replicate d
35、eterminations given in standard analytical textbooks composition. The sample shall he Prepared in accordance with method 102.1 in MIL-SID-1234 prior to the followinE determinations. dried sample in the crucible (see 4.4.1) shall be extracted with ten 20 ml portions of distilled water, stirrine each
36、portion and allowing it to remain in contact with the residue for approximately 1 minute before applying suction. The sample after the tenth extraction shall he tested for complete extraction hy treating a few drops of the extracting liquid on a white spot plate with a few drops of a 1 percent diphe
37、nylamine solution in concentrated sulfuric acid. If a blue coloration develops, additional washings shall be used and retest made, The crucible and contents shall be transferred to an oven at 100 2 5OC for 1 hour, coolec? to a room temperature in a desiccator and weighed. ?te crucible and contents s
38、hall be reserved for the tetranitrocarbaxole determination (see 4.4.3). The percentage of harium or strontium nitrate In the sample shall be calculated as follows to etermine compliance with the applicable requirement of 3.2. 4.4,i preparation of sample for determination of 4.4.2 Determination of ba
39、rium or strontium nitrate, The Percentage of barium or strontium nitrate = 100 (A-3) I.J Where : A = weight of the crucible and dried sample B = weight of crucible and contents after water extraction W = total weight of the original undrieci sample corrected 4.4.3 Determination of tetranirocarbazole
40、. metra- for moisture only nitrocarhazole shall be determined in accordance with the procedure in MIL-STD-1234 Iilethod 420.1, using acetone as the solvent. 4.4.4 netermination of silicon. ?he residiis petainecl from the tetranitrocarbazole determination shall he aspirated to remove contents dried i
41、n an oven at 100 4 50c for 15 Mnutes. The crucible and contents shall be removed from tile oven, resfdual acetone and then the crucible and tx room temperature, and the crucible (on its side) 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-placed i
42、n a clean 250 ml beaker. of concentrated sulfuric acid shall be added to the beaker containing the crucible. The beaker and contents shall he gently warmed on a steam bath and the crucible OccaslonallY rotated until all of the zirconium hydride is in solution. This wll be evidenced by a cessation of
43、 the evolution of hydrogen gas produced in the reaction. The beaker with crucible shall be transferred to a hot plate at high heat ad concentrated nitric acid carefully added dropwise imt3-1 all the oreanic material present is completely oxidized. This will he evidenced b;r a permanent clarity of th
44、e solution. ?.he solution shall be allowed to fume until a volume of approximately 35 ml remains. The solution shall be cooled to room temperature and sufficient distilled water, to make a volume of approximately 190 ml, shall be added cautiously under a watch glass. The crucible skiall be removed f
45、rom the solution with the aid of forceps. Holding the crucible above the beaker, it shall be washed with 50 rnl of distilled water so that the washings are quantitatively transferre to the beaker. !?he solution shall be stirred thoroughlp with a glass rod and allowed to cool to room temperature. The
46、 crucible, thus washed, shall be placed on a Fisher Filtrator containing a 400 ml beaker. retained in the 250 ml beaker quantitatively transferred to the original crucible. The 250 ml beaker and the crucible and contents shall be washe tliroughly with additional 50 ml of water. into the 400 ml beal:
47、er, Th filtrate shall be reserved for the zirconium hydride determination. The crucible and contents shall be Placed in an oven at looo + SOC for 1 hour, cooled to room temperature in a desiccator and weighed. percentage of silicon in the sample shall be calculated as foiiows. APProximatelY 50 ml Su
48、ction shall be appliec! and the material Percent silicon = 100B - W Where : B = gain in weight of tared crucible W = total weight of the or4fl;inal undried sample correcte for moisture only. 4.4.5 Determination of zirconium hydride. The filtrate retained from the silicon determination shall be coole
49、d to a Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-., MIL-P-48240 23 7779706 0337778 O MIL-P-482.40 (PA) 10 2 2OC in an ice bath. determined in accordance with method.416.1 of I4IL-STD-1234. 4.4.6 Determination of laminac plus polyvinyl chloride. The percent of laminac plus polyvinyl chloride in the sample shall be calculated by substracting from 100
