1、MIL-P-24583B(SH) 22 Ausust 1991 SUPERSEDING MIL-P-24583A(SH) 6 April 1990 (See 6.5) MILITARY SPECIFICATION PACKING MATERIAL, GRAPHITIC OR CARBON BRAIDED YARN This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Departments a
2、nd Agencies of the Department of Defense. l. SCOPE “ 1.1 Scope. This specification establishes the requirements for staple or continuous filament graphitic or carbon yarn packing. Packing is for steam valve service on naval ships. 1.2 Classification. The material shall be of the following types, cla
3、sses and grades, as specified (see 3.1 and 6.2). Type I - Continuous filament graphitic or carbon yarn Type II - Staple graphitic or carbon yarn Class 1 - For use where detrimental material and lubricant content of the packing need not be controlled beyond normal manufacturing limits. Class 2 - For
4、use where detrimental material content must be controlled to limits specified herein. Class 3 - For use where detrimental material content need not be controlled beyond normal manufacturing. limits, and stuffing box temperatures do not exceed 260 degrees Celsius ( “C) (500 degrees Fahrenheit, (OF) )
5、 . Grade I- Treated with corrosion inhibitor Grade N - No corrosion inhibitor . Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 5523, Department of the
6、Navy, Washington, DC 20362-5101 by using the self- addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. 4 I . AMSC N/A . FSC 5330 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot
7、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-24583B 53 m 9999906 0487227 L m 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 SDecifications. standards and handbooks. The following specifications, standards, and handbooks form a part of this document t
8、o the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS FEDERAL PPP-F-320 - Fiberboar
9、d: Corrugated and Solid, Sheet stock (Container Grade) and Cut Shapes. MILITARY MIL-L-19140 - Lumber and Plywood, Fire-Retardant Treated. STANDARDS MILITARY MIL-STD-2073-1 - DOD Materiel Procedures for Development and Application of Packaging Requirements. (Unless otherwise indicated, copies of fede
10、ral and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Bldg. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2.2 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unl
11、ess otherwise specified, the issues of the documents which are DOD adopted are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN
12、 c1 SOCIETY FOR TESTING AND MATERIALS (ASTM) 35 - Standard Test Method for True Specific Gravity of Refractory Materials by Water Immersion. Sample. c 561 - Standard Test Method for Ash in a Graphite c 562 - Standard Test Method for Moisture in a Graphite Sample. C 816 - Test Method for Sulfur in Gr
13、aphite by Combustion -1odometric Titration Method. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-t. MIL-P-24583B 53 9999706 0487228 3 W C 889 - Standard Test Methods for Chemical and Mass Spectrographic Analysis of Nuclear-Grade Gadolinium Oxide
14、(Gd,O,) Powder. (General Bomb Method) . (DoD adopted) D 129 - Test Method for Sulfur in Petroleum Products D 512 - Standard Test Methods for Chloride Ion in Water. D 1179 - Test Methods for Fluoride Ion in Water. D 1234 - Standard Method of Sampling and Testing Staple Length of Grease Wool. D 3178 -
15、 Standard Test Methods for Carbon and Hydrogen in the Analysis Sample of Coal and Coke. D 3761 - Test Method for Total Fluorine in Coal by the Oxygen Bomb Combustion/Ion Selective Electrode Method. (DoD adopted) Coal and Coke Using High Temperature Tube Furnace Combustion Methods. D 3951 - Standard
16、Practice for Commercial Packaging. D 4239 - Test Method for Sulfur in the Analysis Sample of (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) (Non-Government standards and other publications are normally availab
17、le from the organizations that prepare or distribute the documents. These documents also may be available in or through libraries or other informational services.) O - 2.3 Order of precedence. In the event of a conflict between the text* of this document and the references cited herein (except for r
18、elated associated detail specifications, specification sheets or MS standards) , the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Material. The material shall b
19、e as specified in 3.1.1 through 3.1.2.3. 3.1.1 Yarn. 3.1.1.1 Type I. Type I packing shall be made of continuous filament graphitic or carbon yarn. 3.1.1.2 Type II. Type II packing shall be made of staple graphitic or carbon yarn. Staple is defined as yarn fabricated using fibers of 2 inch length or
20、longer. . 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-24583B 53 9999906 0487229 5 3.1.1.3 Class 1. Class 1 packing shall be made of type I or II yarn with a pure graphitic dispersion or carbon dispersion. 3.1.1.4 Class 2. Class 2 packing
21、shall be made of type I yarn with a pure graphitic dispersion or carbon dispersion. 3.1.1.5 Class 3. Class 3 packing shall be made of type I or II yarn with a pure graphitic or carbon dispersion and shall be coated with polytetrafluoroethylene (PTFE) (see 4.3.9). 3.1.2 Coatinqs and corrosion inhibit
22、ins treatments. 3.1.2.1 Grade I. Grade I packing shall be provided with a powdered zinc corrosion inhibiting teatment (2 percent Zn, by weight, minimum). If no grade is specified, grade I packing shall be provided. 3.1.2.2 Grade N. Grade N packing shall not contain corrosion inhibiting additives. 3.
23、1.2.3 Coatinqs. Binders may be utilized. Any binder shall comply with 3.4.3. A PTFE coating in accordance with 3.4.2 shall be provided on class 3 packing only. No other coating or lubricant shall be used. 3.2 Construction. Packing shall be braided for sizes 1/4 inch and over to a diagonal interlocki
24、ng through-body-to-surface construction. This construction shall use either single or multiple strands on 12, 18, 20, 24 or 36 diagonal and additional center-corner-stuffer strands as necessary to produce a dense square packing with good dimensional stability. Sizes 1/8 through 3/16 inch only may be
25、 square braided (see 4.2.3.2). 3.3 Sizes and mass. Packing shall be furnished in the sizes shown in table I, as specified (see 6.2). Packing shall be formed approximately square in cross section within the dimensional tolerance of table I (see 4.3.1) . The mass per linear foot shall be not less than
26、 that shown in table I (see 4.3.2). 3.4 Chemical and physical Droperties. The properties of the finished packing shall conform to the requirements of table II. Class 2 material shall also conform to the requirements of table III. 3.4.1 DisDersion. Dispersion shall be lubrication grade graphite or ca
27、rbon. 3.4.2 PTFE coatina (class 3 onlv) . The Coating shall be from a dispersion of PTFE and shall not exceed 10 percent by mass of the Yarn (see 4.3.8). 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-c MIL-P-245838 53 9999906 0487230 L m f * 3.4.
28、3 Prohibited additions. There shall be no intentional additions of any of the detrimental materials of table III or antimony, arsenic, bismuth, cadmium, lead, tin or zinc (grade N only) during the manufacture or packaging of the product. 3.4.4 Braid qeometry retention. Untaped, cut ends shall not un
29、ravel more than 1/8 inch with the packing dry or wet. 3.5 Put-up. Unless otherwise specified (see 6.2) , packing shall be uniformly coiled on spools or reels in accordance with table IV. 3.6 Mercury exclusion. During manufacturing, fabrication, handling, packaging, and packing, the packing material
30、shall not come in contact with mercury or mercury containing compounds. 3 7 Workmanship. The packing shall be free from extraneous material and visible defects that may affect its serviceability (see 4.2.3). TABLE I. Nominal size (inches) 1/8 5/32 3/16 7/32 9/32 5/16 11/32 13/32 7/16 15/32 17/32 9/1
31、6 19/32 11/16 13/16 15/16 1 1 1/4 1/ 4 3/8 1/ 2 5/ 8 3/4 7/8 Sizes and mass of packinq. Tolerance (inches) - f 1/64 f 1/64 - + 1/64 k 1/64 k 1/32 - + 1/32 f 1/32 f 1/32 - + 1/32 k 1/32 - + 1/64 - + 1/32 - + 1/32 - + 1/32 - + 1/32 - + 1/32 k 1/16 f 1/16 f 1/16 k 1/16 f 1/16 k 1/16 k 1/16 - + 1/16 -J
32、Minimum mass (lb/linear ft) .0045 .007 . O09 .013 .017 .021 .026 .032 ,044 .052 .059 .076 .085 .095 .127 .152 .178 .206 .237 .270 .038 .067 .105 .421 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-24583B 53 9999906 0487231 3 TABLE II. Chemic
33、al and Physical ProDerties. 1 Property Value Test Carbon assay, type I and II 95 percent min, by mass 4.3.3 Ash . 1 percent max, by mass 4.3.4 specific gravity 1.38 min 4.3.5 Moisture content 3 percent max 4.3.6 Compression recovery . 25 percent min 4.3.10 TABLE III. Detrimental materials (class 2 o
34、nlv) .1/ Element Maximum allowable impurity levels in parts per million (Ph) Mercury (Hg) 10 Sulfur (S) 750 Total halogens (chlorine, 500 bromine and fluorine) Chlorine (Cl) 250 Bromine (Br) 250 Fluorine (F) 250 . d I u See 4.3 TABLE IV. Put-up Packing size Package (net mass) (inches) (lbs) 1/8 thro
35、ugh 11/32 3/8 through 19/32 5/ 8 11/16 13/16 15/16 3/ 4 7/8 1 1 1/4 1, 2 or 3 lb spools 2, 3, or 5 lb spools 3, 5, 10, or 25 lb reels 3, 5, 10, or 25 lb reels 5, 10, or 25 lb reels 5, 10, or 25 lb reels 5, 10, 25, or 50 lb reels 5, 10, 25, or 50. lb reels 10, 25, or 50 lb reels 10, 25, or 50 lb reel
36、s 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 inspection requirements (examinations and tests) as 6 Provided by IHSNot for ResaleNo reproduction or networking
37、 permitted without license from IHS-,-,-e MIL-P-245838 53 m 9999906 0487232 5 m . specified herein. Except as otherwise specified in 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, u
38、nless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. 4.1.1 ResDonsibilitv for compliance. All items shall
39、 meet all requirements of sections 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall inspection system or quality program. The absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility of en
40、suring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling inspection, as part of the manufacturing operations, is an acceptable practice to ascertain conformance to requirements, however, this does not authorize submission
41、of known defective material, either indicated or actual, nor does it commit the Government to accept defective material. 4.2 Quality conformance inspection. Quality conformance inspection shall be in accordance with table V and 4.2.2 (see 6.3). TABLE V. Quality conformance inspection. .Inspection Si
42、zes and mass Carbon assay Ash Specific gravity Moisture content Detrimental materials (class 2 only) PTFE coating Workmanship Compression recovery Braid geometry retention Requirements 3.3 Table II Table II Table II Table II Table III 3.4.2 3.7 Table II 3.4.4 Tests 4.3.2 r 4.3.1 and 4.3.3 4.3.4 4.3.
43、5 4.3.6 4.3.7 4.3.8 4.2.3 4.3.10 4.3.11 4.2.1 W. Unless otherwise specified herein, a lot shall consist of all finished packing of one size, class and grade produced in a continuous run or at the same time under the same conditions. The sampling unit shall be one spool or reel of packing, as applica
44、ble. 4.2.2 Samplinq. Sampling shall be as specified in 4.2.2.1 and 4.2.2.2. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-min uni in MIL-P-24583B 53 m 9999906 0487233 7 “ 4.2.2.*1 SamDlins for visual and dimensional examination. As a ,imum, the c
45、ontractor shall randomly select a quantity of sampling ts from each lot of graphitic or carbon braided yarn packing material accordance with table VI and subject them to the examinations of 4.2.3.1 and 4.2.3.2. The sample size depends on the lot size. If one or more defects are found in any sample,
46、the entire lot shall be rejected. The contractor has the option of screening 100 percent of the rejected lot for the defected characteristics or providing a new lot, which shall be selected in accordance with the sampling plan herein. The contractor shall maintain for a period of three years after c
47、ontract completion, records of inspections, tests, and any resulting rejections. TABLE VI. SamDlina for visual and dimensional examinations. b. Lot size Sample size 2 to 50 5 51 to 90 7 91 to 150 11 151 to 280 13 281 to 500 16 501 to 1200 19 1201 to 3200 23 3201 to 10,000 29 10,001 to 35,000 35 35,0
48、01 to 500,001 (and above) 40 *I “I_ C 4.2.2.2 Samplins for tests. A single random sample shall be selected from each lot. O 4.2.3 Examinations. The units shall be examined for visual defects as specified in 4.2.3.1 and 4.2.3.2. 4.2.3.1 Visual defects. Each unit selected in accordance with 4.2.2.1 sh
49、all be surface examined to determine conformance to the requirements that do not require tests (see 3.7) . The presence of corrosion inhibitor on grade I packing shall be confirmed. Any unit containing one or more visual defects shall be rejected, and if the number of defective units in the sample exceeds the acceptance number for that sample, this shall be cause for rejection of the lot which it represents. 4.2.3.2 Construction. The diagonal i
