1、IMIL-A-24641AI .= .-. _27 October 1986SUPERSEDINGMIL-A-24641(SH)5Sept%mber 1984.(See 6.7)MILITARY SPECIFICATIONACID , HYOROFLUORIC ; TECHNICALis specification. is approved for use by all Departments and Agencies ofthe1.1.1acid.2.2.1Department of Oefense.SCOPEw. This specification covers a technical
2、grade of hydrofluoricAPPLICABLE DOCUMENTSGovernment documents.2.1.1 Specifications and standards. The following specifications and stan-dards form a part of this specification to the extent specified herein. unlessotherwise specified , the issues of these documents shall be those listed in theissue
3、of the DeDaKtmettt of Defense Index of SDecif ications and Standards (DoDISS)and supplement thereto, cited in the solicitation.SPECIFICATIONSFEDERALPPP-B-5135 - Boxes;PPP-B-601 - Boxes,PPP-B-62 1 - Boxes,PPP-B-636 - Boxes ,STANDARDSFEDERALWood, Wire bound.Wood , Cleated-Pl-ywood.Wood, Nailed and Loc
4、k-CQrner.Shipping, Fiberboard.FED-STO-313 - Material SafetySubmission of.Data Sheets, Preparation and theBeneficial comments (recommendacion5 , additions , deletions) and any pertinentdata which may be of use in improving this document should be addressed to:Commander, Naval Sea Systems Command , SE
5、A 55Z3 , Department of the Navy,Washington, DC 20362-5101 by using che self-addressed Standardization DocumerttImprovement Proposal (DD Form 1426) app=riw at. the end of this docent or.by letter. -.AMSC N/A Fsc 6810DISTRIBUTION SfATEMNT A Approved for public release; distribution unlimitedProvided b
6、y IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILITARYMIL-STO-1O5 -MIL-STD-129 -MIL-A-24641A(.Sampling Proced:rea and Tables fOr Inspectifi by .Attributes.Marking for Shipment and Storage.* 2.1.2 Other Government documents. The folloving other Government doc
7、umentsform a part of this specification to the extent specified herein. Unless other-wise specified , the issues shall be those in effect on the date of the solicita-*tion.DEPARTMENT OF TIUU4SPORTATION (DoT)Code of Federal Regulations (CFR) , Title 4949 CFR 171.1 - Department of Transportation Rules
8、 and Regulationsfor Transportation of Explosives and Other Danger-ous Art icles.DEPARTMENT OF LABOROccupational Safety and Health Administration (OSWA)Code of Federal Regulations29 CFR, Part 1910.1200 - Hazard Communication Standard.(Application for copies should be addressed to the Superintendent o
9、fDocuments, U.S. Government Printing Off ice, Washington, DC 20402. )(Copies of specifications and standards and other Government documentsrequired by contractors in connection with specific acquisition functions shouldbe obtained from the contracting activity or as directed by the contractingactivi
10、ty. ) (2.3 Order of precedence. n the event of a conflict between the text ofthis specification and the references cited herein (except for associated detailspecifications , specification sheets or MS standards) , the text of this specifi-cation shall take precedence. Nothing in this specification,
11、however, shallsupersede applicable laws and regulations unless a specific exemption has beenobtained.3. RSQU lREMENTS3.i Material. Hydrof luoric acid, teclmi.cal, shall60 percent of hydrogen fluoride (lIF) by weight, in wateras specified in 4.4.1.3.2 Labelinection amt tke.action taken to correct the
12、 defects found .inthe original material shall befurnished before resubmitting material.4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-24641AIII4.4 Test procedures. . . .-4.4 1 - Hydrogen fluoride.4.4il.l APParatus. The following apparatus sha
13、ll be used in the testingprocedur standardized 1/10 normal iodine solution; asaturated solution of potassium nitrate (KN03); phenol phthalein indicatOr; andsr.arch indicator.4.4.1.3 Procedure for determining total acidity and hydrofl”orosilicic acid.A portion of 3 grams of the sample shall be accura
14、tely weighed in a platinumweighing tube. TenML of a saturated solution of KN03 shall be poured into aplatinum dish of approximately 125 mL capacity and chopped ice added. Fifty mLof standard 1 normal NaOH shall be run in from a burette and 3 drops of phenol ph-thalein indicator added. The weighing t
15、ube containing the weighed sample shallbe immersed beneath the surface of the caustic and the cover slowly removedwith a platinum wire to allow the sample to mix slowly with the caustic. Thesolution shall be kept cold and titrated with the standard NaOH in the buretteto the first permanent pink colo
16、r. lhe total milliliters used shall be notedas (A). The dish shall be put on a hot plate and the solution warmed to176 degrees Fahrenheit (“F) (80 degrees Celsius (“C). Additional standardNaOH shall be added to obtain the second end point and the additional millilitersnoted as (B) .4.4.1.4 Procedure
17、s for determining sulfuric acid in hydrofluoric acid.A portion of 10 grams of the sample shall be accurately weighed in a platinumweighing tube and transferred to a platinum dish. The-weiging tube shall berinsed into the dish with distilled water. The solution shall be evaporated toconstant volume (
18、near dryness) on a steam bath. A few drops of water shall beadded and the evaporation repeated. Lack of odor during the second evaporationindicates that all acids other than sulfuric have been expelled. The residueshall be cooled , dissolved in 100 mL of carbon dioxide (C02) free water, andtitrated
19、with he standard 1 normal NaOH solution , using phenol phthalein indi-cator. The milliliters needed shall be noted as (C) .4.4. 1.5 Procedure for determining sulfurous acid in hydrofluoric acid .A portion of .10 grams of the sample shall be accurately weighed in a platinumdish with 75 mL of. water.
20、l%ia solution shall be titrated with standard 1/10normal iodine using starch indicator . The milliliters used shall be noted as(u). -.5Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-A-24641A4.4. 1.6 Calculation of t“he percentae of hydrogen fluo
21、ride. The percentage .;of hydrogen fluoridiZ _ be calculated by: tbe following formula: .I (_ :.El” -I2A-B 2C 2DN, Percent HF = Nss 52 sNhere A, B, C and D are the milliliters used and S1 , S2 and S3 are the samplestaken in following the procedures specified in 4.4.1.3, 4.4. 1.4 and 4.4. 1.5.N and N
22、l are the normalities of the sodium hydroxide and iodine solutions,respectively.4.5 Inspection of packaging. Sample packages and packs, and the inspec-tion of the preservation-packaging , packing and marking for shipment and storageshall be in accordance with the requirements of section 5 and the do
23、cuemtsspecified therein.5. PAIXCAGING(The packaging requirements specified herein apply only for direct cover. -ment acquisition. )I 5.1 Preservation. Preservation shall be level A.* 5.1.1 Level A. Hydrofluoric acid shall be furnished in l-pint or l-gallonnatural hard rubber , ceresin or polyethylen
24、e bottles, or 20-gallon rated capacitysteel overpacks as specified (see 6.2) . Polyethylene bottles shall be in accor-dance with 2E of DOT regulation (see 2.1 .2) with a minimum thickness of 0.030inch for l-gallon bottles. Drums shall be in accordance with 6D or 37M withinside 2S or 2SL polyethylene
25、 liners of DOT regulations with thread closuresand vent plugs lubricated after filling to prevent thread seizure.5.2 Packing. Packing shall be level A, B or C as specified (see 6.2).5.2.1 Level A. Hydrofluoric acid preservation-packaged in l-pint orl-gallon containers as specified in 5.1.1 shall be
26、packed in wood-cleated ply-wood , nailed wood or wire bound wood boxes in accordance with overseas type ofPPP-B-601 , overseas class 2 of PPP-B-621 Or class 3 of PPP-B-585, respectively.Box closures shall be as specified in the applicable box specification or appendixthereto. The gross weight of shi
27、pping containers shall not exceed 70 pounds.Additional packing for the 20-gallon steel cverpacks shall not be required.5.2.2 Level B. Hydrofluoric acid preser.ed in l-pint or l-gallon con-tainers as specified i.,5.1.1 shall be packed in wood-cleated plywood , nailedwood or wirebo”nd wood boxes in ac
28、cordance with domes tic type of PPP-B-601 ,clca of ppp-B-621 STANDARDIZATION 00CUMENT IMPROVEMENT PROPQSAL.( TECHNICAL,MAME O, S”BM, n, NO O. GAN,ZA7,0N 4. T“,EOf OROANt Z. TION,Mh ,a75 vE?400.a75 =E.ALml+F.6s .,. ,., R-”. ”.”; m:REM* s.NA94C OFS”.94, E. h“, ,i,., u, _op,wa.b. WORK TELCP”ONE NUMOE, ,f.clu4c A,uCA, - O.%,.,n,MAILINO A00!+Es5 ,Sn Clti, S1.t Z,? Cad., - OC.!b,.l . -8.0 ATEOr S90Mt,0N,:rY”UDD, .-.mm . . . . .Aa.(. (Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
