NAVY MIL-P-24503 B-1991 PACKING MATERIAL GRAPHITIC CORRUGATED RIBBON OR TEXTURED TAPE AND PREFORMED RING《波纹或花纹带和预成型环石墨填充物》.pdf

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1、. - x G:. - 1 i i fl1-24503B . 53 m 9799906 0487364 O m! z- 9 INCH-POUNDI MIL-P-24503B(SH) 22 Aueust 1991 SUPERSEDING 12 April 1984 (See 6.6) MIL-P-24503A(SH) e MILITARY SPECIFICATION PACKING MATERIAL, GRAPHITIC, CORRUGATED RIBBON OR TEXTURED TAPE AND PREFORMED RING This specification is approved fo

2、r use by the Naval SeaSystems Command, Department of the Navy, andis available for use by-all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers various types, classesand grades of non-woven graphitic packing for steam valve service on Naval ships on

3、 which valve stuffing box temperatures are limited to a maxfmum of 1000 degrees Fahrenheit (OF). 1.2 Classification. The material shall be of the following types, classes and grades as specified (see 6.1 and 6.2). Type I - Corrugated ribbon or textured tape. Type II - Preformed ring. Class 1 - For u

4、se where detrimental material content of the packing Class 2 - For use where detrimental material content must be controlled need not be controlled beyond normal manufacturing limits. to the limits specified herein. Grade I - Treated with corrosion inhibitor. Grade N - No -corrosion inhibitor. 1 Ben

5、eficial 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 Navy, Washington, DC 20362-5101 by using the self-addressed Standardization Documen

6、t Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. .c Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications. standards. and handbooks. The followi

7、ng specifications, standards and handbooks f0rm.a part of this document to 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

8、 the solicitation (see 6:2). SPECIFICATIONS FEDERAL PPP-F-320 - Fiberboard: 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 Applic

9、ation of Packaging Requirements, (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Navy Publishing and Printing Service Office, Bldg. 4D, NPM-DODSSP, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2.2 Non-Government publica

10、tions. The following documents form a part of this document to the extent speciEied herein. Unless 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 lis

11、ted in the DODISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) C 559 - Standard Test Method for Bulk Density by Physical Measurements of Manufactured Carbon and Graphite Articles, C 561 - Standard Test Method for Ash in a Grap

12、hite Sample, C 816 - Standard Test Method for Sulfur in Graphite by Combustion C 889 - Standard Test Methods for Chemical and Mass Iodometric Titration Method. Spectrographic Analysis of Nuclear-Grade Gadolinium Oxide (Gd,O,) Powder. (General Bomb Method). (DOD adopted) D 129 - Standard Test Method

13、for Sulfur in Petroleum Products .D 512 - Standard Test Methods for Chloride Ion in Water. 2 .- . . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-T e PP Materials D 1179 - Standard Test Methods for Fluoride Ion in Water. (DOD D 3761 - Standard Test

14、 Method for Total Fluorine in Coal by the D 4239 - Test Method for Sulfur in the Analysis Sample of Coal adopted) Oxygen Bomb Combustion/Ion Selective Electrode Method. and Coke Using High Temperature Tube Furnace Combustion Methods. lication for copies should be addressed to American Society for Te

15、sting and , 1916 Race Street, Philadelphia, PA 19103.) (Non-Government standards and other publications are normally available from the organizations that prepare or distribute the documents, These documents also may be available in or through .libraries or other informational sqryices. ) . - 2.3. .

16、Order of precedence. In the event of .-a conflict between the. text. -of this specification and the references cited herein (except for related - associated detail specifications, specification sheets or MS standards), the text of this document takes precedence. Nothing in this document, however, su

17、persedes applicable laws and regulations unless a specific exemption has been obtained. _. . . “. 3. REQUIREMENTS 3.1 First article, When specified (see 6.2), a sample shall be subjected to first article inspection (see 6.4) in accordance with 4.3. 3.2 Material. Requirements specified herein apply t

18、o class 1 and class 2 and grade O I and grade N packing, except where noted (see 6.1.3 and 6.1.4). 3.2.1 Tvpe I. The packing shall be made entirely of pure, flexible graphitic material, having no binders and meeting the requirements of table I. 3.2.2 Twe II. Preformed packing rings shall be manufact

19、ured from graphitic material conforming to the requirements of table I. 3.2.2.1 Density. The bulk density of the finished preformed packing ring- shall be as follows when tested inaccordance with 4.5.4: Die-formed rings - 90 + 5 - 10 pounds per cubic foot (lb/ft3) Laminated rings - 70 5 lb/ft3 3 Pro

20、vided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I. j flIL-P-24503B 53 W 9999906 0487367 b 0 I MIL-P-24503B(SH) TABLE I. Phvsical properties, Property Value Dens i ty , bulk 65 10 Ash content, percent Detrimental materials 5.0 (max) . . Mercury- (Hg) . -

21、 - - Sulfur (S) Bromine and Fluorine) Chlorine (Cl) Bromine (r) Fluorine (F) Total halogens (Chlorine, L I Unit Pounds per cubic foot ( lb/ft3) Maximum allowabl impurity level in parts per million . 10 750 500 250 250 250 - Test paragraph 4.5.1 4.5.2 4.5.3 3.2.2.2 Binder. If type II packing rings ar

22、e manufactured by laminating pure flexible graphitic sheets, a binder meeting the requirements of 3.2.4 may be utilized but the rings must be processed for conversion of any binder used during the laminating process to an all carbonaceous material, A binder meeting the requirements of 3.2.4 may also

23、 be used to ensure .the adherence of corrosion inhibiting treatments (see 3.2.3) on grade I packing, 3,2.3 Corrosion inhibiting treatments. 3.2.3.1 Grade I. Grade I packing shall be provided with a powdered zinc (type II only) corrosion inhibiting treatment (2 percent Zn, by weight, minimum), If no

24、grade is specified for type II packing, grade I shall be provided. 3.2;.3.2 Grade N. Grade N packing shall not contain corrosion inhibiting additives, 3.2.4 Prohibited additions, There shall be no intentional additions of any of the detrimental materials of table I or antimony, arsenic, bismuth, cad

25、mium, lead, tin or zinc (grade N only) during the manufacture or packaging of the product. 3.2.5 Mercury exclusion, During manufacturing, fabrication, handling, packaging, and packing, the packing material shall not come in contact with mercury or mercury containing compounds. 4 . . ._. Provided by

26、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-i ! i MIL-P-24503B 53 W 9999906 0487368 8 3.3 Dimensions and tolerances. 3.3.1 Tme I ribbon packinpy. Unless otherwise specified (see 6.2), the packing shall be uniformly coiled, spooled, or reeled according to tab

27、le II. TABLE II. Dimensions for tvpe I ribbon packing. Gauge thickness, inches Width, inches f 0.030 Length, feet, min minimum (min) O, 015 0.25 25 ,015 .50 25 ,015 .75 50 .O15 1.00 . . 50 J . “. - “. _ - ._ . . . “ “.“ 3.3.2 TvDe II preformed packing. Unless otherwise specified (see 6.2) the tolera

28、nces for type II packing shall be in accordance with table III. The tolerance shall apply to finished rings prior to any cutting operations. -. . - “ 3.3.2.1 Split rins. The number of cuts (zero, one or two) shall be as specified (see 6.2). Cuts shall be made at approximately a 45 degree angle. When

29、 two cuts are required (separating the ring into two parts) the resulting parts shall be approximately the same size, If the number of cuts is not specified, single cut rings shall be provided, TABLE III. Tolerances or tme II Dackinn (inches). O Inside diameter Outside diameter Thickness (i.d.) (0.d

30、.) Laminated packing rings +o. O00 +0.010 . - + 1/32 -0.005 -0.000 Die formed ribbon packing rings +O. 030 +o. O00 -0.000 -0.020 - + 0.060 1 i 3.4 Installation instructions. Installation, use, and precautionary instructions shall be furnished with each unit package, The instructions may be in the fo

31、rm of labels or printed inserts that will not be affected by water or grease. Where the instructions are placed within any opaque package, the outside of the package shall be marked to indicate use instructions enclosed, 3 5 Simulated Performance, There shall be no steam leakage from the packing gla

32、nd during the simulated performance test at a pressure of 1200 not in accordance with contract requirements, Not packaged in unit containers as specified, Mixed type and size in the same container; contain- ing less than indicated or specified quantity. 4 8 . Provided by IHSNot for ResaleNo reproduc

33、tion or networking permitted without license from IHS-,-,-i Examine Packing Defect Not the level specified; not in accordance with the Packing material not as specified; closures not Gross weight of shipping container exceeds specified contract requirements, accomplished by specified methods or mate

34、rials. limit. Interior and exterior marking omitted, illegible, incorrect, incomplete, not in accordance with contract requirements. - 4.4.4 Quality conformance tests. The sample selected in accordance with 4.4.2.3 shall be tested as specified in 4.5.1, 4.5.2, and 4.5:3. If a sample does not conform

35、 to all the test requirements, this shall be cause for rejection of the lot which it represents. 4.5 Test Drocedures. 4.5.1 Bulk density, The bulk density of the type I and II materials shall be determined in accordance with ASTM C 559. O 4.5.2 Ash content. The ash content of the type I and II mater

36、ials shall be determined in accordance with ASTM C 561. 4.5.3 Detrimental material tests. For determination of the detrimentax materials listed in table I for class 2 only, the test methods of table VI1 .or alternate methods of equal or improved accuracy and precision shall be used. TABLE VIL. Detri

37、mental material tests. Element Chlorine (Cl) , Bromine (Br) Fluorine ( F) Sulfur (S) Preparation/analysis test methods (1) .Pyrohydrolysis (ASTM C 889)/Ion Chromato- (2) ASTM D 129/ASTM D 512 (1) .Pyrohydrolysis (ASTM C 889)/Selective Ion (2) ASTM D 129/ASTM D 1179 (3) “ASTM D 3761 (sample preparati

38、on and (1) High temperature combustion in 100 percent graphic Analysis Electrode or Ion Chromatographic Analysis analysis) Oxygen/Non-dispersive infrared analysis or Ion Chromatographic Analysis 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE

39、 VII. Detrimental material tests. - Continued Element Preparation/analysis test methods (2) ASTM C 816 (sample preparation and (3) ASTM D 4239 method 3 (sample preparation analysis) and analysis) Mercury (Hg) (1) Direct analysis of volatile elements (Hg) (None intentionally added) by emission spectr

40、ographic method NOTE: Where two preparation or analysis test methods are specified, either one is acceptable. 8 . . . . . . . . The vendor shall provide certification that the limits of table Ihave been met and that low melting metals (Sb, As, Bi, Cd, Pb,. Sn or Zn Zn for grade 2 only) have not been

41、 added as intentional constituents. In lieu of specific test results for the lot to be delivered, certifications may be based on tests of both raw materials and productio-n lots of similar finished packing material over an extended time period (not exceeding 3 years between tests), Any change to man

42、ufacturing processing which affects product composition, including changes to raw material, binders or inhibitors (grade I) shall require additional testing to form the basis for future certifications, . “ . . . _. - . . . - , . . - . . . . 4.5,4 Simulated performance, The test shall be conducted in

43、 an apparatus designed to simulate conditions in valves in actual service. A schematic of test rig is shown on figure. 1. The valves used in the simulator shall have glands and stems that are in as new condition. The entire piping system and valves shall be insulated so as to minimize heat loss, The

44、rmocouples shall be installed so as to indicate the actual steam temperature. The simulator shall be capable of holding a temperature of 975 valves need not be cycled) Any leakage or gland adjustment shall be recorded. After the simulated performance test is once performed acceptably, providing prod

45、uct composition of processing has not been changed, a certificate of compliance may be accepted thereafter (see 3.5 and 6.3). 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-VALVE 2“ TEST STOP VALVE .M+ RETURN LINE STEAM FLOW2 1200 LB/LN G. VALVE

46、2“ TEST STOP VALVE - . - FIGURE 1. Test riK. 5. PACKAGING (The packaging .requirements specified herein apply only for direct Government acquisition.) -.- 5.1 General. S. l. 1 Navy fire-retardant requirements. (a) Treated lumber and plwood. Unless otherwise specified (see 6.2), all lumber and plywoo

47、d including laminated veneer material used in shipping containers and pallet construction, members, blocking, bracing, and reinforcing shall be fire-retardant treated material conforming to MIL-L-19140 as follows: Levels A and B - Type II - weather resistant. Level C - Type I - nonweather resistant.

48、 Category 1 - general use. Category 1 - general use. (b) Fiberboard. Fiberboard used in the construction of class- domestic, nonweather resistant fiberboard, cleated fiberboard boxes including interior packaging forms shall meet the flame spread index and the specific optic density requirements of P

49、PP-F-320 and amendment thereto. 5.2 Preservation. Preservation shall be level A or C, as specified (see 6.2). 5.2.1 Level A. Packing, put-up as specified in 3.3.1, shall be protected by placing a wrap of greaseproof barrier material over the packing material and between the flanges of the spool or reel. The wrap shall be secured, utilizing pressure-sensitive tape. I Packing material furnish