1、I NCH-POUNDMIL-P-00223C (AR)AMENDMENT 22 October 1998SUPERSEDINGAMENDMENT 110 June 1997MILITARY SPECIFICATIONPOWDER, BLACKThis Amendment forms a part of Military Specification MIL-P-00223C (AR) dated 5February 1993, and is approved for use by the U.S. Army Armament Research,Development and Engineeri
2、ng Center and is available for use by all Departmentsand Agencies of the Department of Defense.PAGE 2* 2.1.1 Delete the following documents:“RR-S-366MIL-STD-129MIL-STD-1218MIL-STD-1235”and substitute with the following:“MIL-STD-1916 DOD Preferred Methods for Acceptance of Product”PAGE 3* 2.1.2, Add
3、“12982865 Minimum Marking Instructions for Ammunition and ExplosivesContainers” to the US Army ARDEC drawing list.PAGE 53.3.3 Applicable to class 3 only: Add “(See 6.13)” at the end of 3.3.3.AMSC N/A 1 of 6 FSC 1376DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.Prov
4、ided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-00223C (AR)AMENDMENT 23.5 Delete 3.5 and substitute with the following:“3.5 Specific gravity.3.5.1 Specific gravity determined by mercury pycnometer. The specific gravity ofblack powder shall not exce
5、ed the limits of 1.72 minimum and 1.80 maximum for glazedpowder, 1.65 minimum and 1.81 maximum for unglazed class 7 powder and 1.69minimum and 1.76 maximum for unglazed class 8 and 9 powder when determined asspecified in 4.5.6.1, 4.5.6.2 or 4.5.6.3.3.5.2 Specific gravity determined helium gas pycnom
6、eter. The specific gravity ofblack powder shall not exceed the limits of 1.890 minimum and 2.012 maximum forclasses 1 to 6 glazed powder and 1.955 minimum and 1.997 maximum for unglazedclass 7 powder when determined as specified in 4.5.6.4.”3.7 Granulation, Table II:Class 7: Delete “5%” maximum, and
7、 substitute “7%” maximum allowable weightpercents of class 7 black powder passing through U.S. Standard Sieve #100 in Table II.Class 8: Delete “3%” maximum, and substitute “5%” maximum allowable weightpercents of class 8 black powder retained on U.S. Standard Sieve #100 in Table II.PAGE 144.4.2.4 Te
8、st sampling, second sentence:Delete: “Batches are units of product that shall be selected for inspection IAW theprocedure in MIL-STD-1235, CSP-1 plan, Code letter D, f=1/5, i=11.”Substitute: “Batches are unit of product that shall be selected for inspection inaccordance with MIL-STD-1916 except that
9、 in lieu of Table IV (MIL-STD-1916) thefollowing continuous sampling plan shall be used: i=11, f=1/5, and that there shall be noreduced or tightened inspection level.”4.4.2.5 Sample preparation for analysis, first sentence: Delete “RR-S-366 or” andsubstitute“ shall comply with ASTM E11”PAGE 15* 4.5
10、Method of Inspection, second sentence: Delete “in accordance with MIL-STD-1218” andsubstitute “ all chemicals shall be Reagent Grade or ACS Grade.”2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-00223C (AR)AMENDMENT 24.5.2.1 Alternate method f
11、or moisture: Rename 4.5.2.1, “Alternate method A formoisture”.4.5.2.2 Alternate method for moisture: Rename 4.5.2.2, “Alternate method B formoisture”.4.5.2 Add 4.5.2.3 as follows:“4.5.2.3 Alternate method C for moisture. An Arizona Instrument CorporationsComputrac MAX-50 moisture analyzer or its equ
12、ivalent shall be used for this method.The Computrac MAX 50 moisture analyzer is a microprocessor controlled instrumentwith programmable heating temperatures from 25 deg. C to 225 deg. C whichincorporates a closed loop heat sensing system that will maintain temperature controlwithin plus or minus 1 d
13、eg. C. Self diagnostics assure that a Fail Safe condition will exist,shall a default occur. The analyzer heats the sample within an enclosed test chamber withthe use of a nichrome heating element. Through a predictive feature, the analyzerautomatically terminates the test at an accurate end point. A
14、 built-in electronic forcebalance automatically weighs the sample as it is being added then displays the finalmoisture content as either percent moisture or percent solid at test completion.Resolution of the MAX-50 is 0.01% and is designed to accurately detect moisture levelsdown to 0.10% (10 gm cap
15、acity unit) and 0.04% (20 gm capacity unit).The unit (Computrac MAX-50 or its equivalent) shall be turned on and allowed towarm up for about 20 minutes. Set the unit to display %MOIST. The test temperatureshall be set at 85 deg. C. Open the test chamber lid and place a clean sample pan onto thetray
16、support. With the test chamber lid closed, push the START key. When theLOAD light on the display illuminates, open the test chamber lid, and evenly depositenough black powder onto the sample pan until the display reads between 70 and 90percent at which time the analyzer will emit a short beep to ale
17、rt the operator that enoughsample has been added. Close the test chamber lid and the test will automatically proceed.The analyzer will emit three short beeps and display %MOIST, FINAL, and CHECKat the completion of the test. The moisture content of the sample shall be read directlyFrom the %MOIST di
18、splay on the analyzer.”3Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-00223C (AR)AMENDMENT 2PAGE 214.5.6 Add 4.5.6.4 as follows:“4.5.6.4 Specific gravity by helium gas pycnometer. (Applicable to classes 1 to 7). Ahelium gas pycnometer (Microm
19、eritics, Accupyc 1330, or equivalent) shall be used. Ananalytical balance accurate to +/-0.01 mg (Fairfax or equivalent) shall be used. Thepycnometer shall be calibrated and operated at the conditions and parameters specifiedherein. Pycnometer manufacturer instructions and procedures should be follo
20、wed for thedetailed step-by-step operation of the gas pycnometer.4.5.6.4.1 Calibration. Calibration shall be performed using factory supplied steel balls(or steel cylinders) with certified values. For refined calibration or trouble-shooting, othercertified standards (such as glass bead standards cer
21、tified by a nationally recognizedinstitute for standards) may be used. The pycnometer shall be calibrated using parametersand conditions specified below:Helium flow pressure: 20-22 psig (recommended)Number of purges: 5Number of runs: 5Purge pressure: 19.5 to 19.6 psigRun pressure: 19.5 to 19.6 psigE
22、quilibration rate: 0.005 psig/minUse run precision: No. (See note.)Equipment warm-up: 15 minutes minimum from st and-by and 1 hour minimumfrom cold start-up.Note: Run precision may be used for refined calibration or trouble-shooting4Provided by IHSNot for ResaleNo reproduction or networking permitte
23、d without license from IHS-,-,-MIL-P-00223C (AR)AMENDMENT 24.5.6.4.2 Procedure for analysis. Sample of black powder shall be acclimated to roomtemperature before analysis. During winter months, let the unopened sample containerwarm up to room temperature for at least 16 hours prior to opening the sa
24、mple container.The black powder sample shall be tested as received. Any action/operation that may causesize attrition or modification, such as grinding or sieving, shall be avoided. Thepycnometer shall be checked to verify that it is operating properly prior to sample analysis.An empty sample cup is
25、 weighed to the nearest 0.1 mg. Transfer a quantity of sample(about 10 grams) to the cup. The powder must be packed and the cup at least 2/3 full toobtain optimum sample weight for high accuracy analysis. The cup and sample shall beweighed to the nearest 0.1 mg. Place the cup (sample) in the pycnome
26、ter chamber andlock the chamber. The sample shall be analyzed following step-by-step operatinginstructions from the pycnometer manufacturer and at the operating parameters andconditions specified below:Helium flow pressure: 20 to 22 psig ( recommended )Number of purges: 5Number of runs: 5Purge press
27、ure: 16.2 to 16.3 psig. (See note.)Run fill pressure: 16.2 to 16.3 psig. (See note.)Equilibration rate: 0.0250 psig/minUse run precision: YesPercent full scale: 0.1Note: Purge and run pressure pressure of 19.5 to 19.6 psig can also be used for thedetermination of specific gravity of class 7 black po
28、wder.Calculate the five volumes from the 5 runs, and average the 5 readings. Calculate theSpecific gravity of the sample by dividing the individual mass of the sample by itsCorresponding averaged volume.”* 4.5.8 Delete “RR-S-366 or” and make the sentence read “The sieves shall comply withASTM E11.”P
29、AGE 23* 5.3.2 Delete “Standard MIL-STD-129.” And substitute “Drawing 12982865 Minimum Marking Instruction for Ammunition and Explosive Containers.”5Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-00223C (AR)AMENDMENT 2PAGE 286.13 Changes from p
30、revious issue: Renumber this paragraph to 6.14.6.13 Add 6.13 as follows:“6.13 Higher moisture content class 3. Class 3 black powder with a moisture contentnot exceeding 0.70 percent is available and can be specified in the contract or purchase order.”The margins of this amendment are marked with an
31、asterisk or vertical lines to indicatewhere changes ( additions, modifications, corrections, deletions ) from the previousamendment were made. This was done as a convenience only and the Government assumesno liability whatsoever for any inaccuracies in these notations. Bidders and contractors arecau
32、tioned to evaluate the requirements of this document based on the entire contentirrespective of the marginal notations and relationship to the last previous amendment.Custodian: Preparing activity:Army-AR Army-ARProject: (1376-0060)6Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
