1、MIL-A-L952LB 53 m 999990b 0528343 b MILITARY SPE FI CAT MIL-A-l9521B(SH) 04 Mav 1992 SUPERSEDING 30 January 1961 (See 6.5) MIL-A-I9521A(SHIPS) ON ANODE RETAINING SUPPORT PLUGS AND ANODE SELECTION AND INSTALLATION DESIGN CRITERIA FOR SHIPBOARD CONDENSERS AND HEAT EXCHANGERS This specification is appr
2、oved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Dcpai tmeiits and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. Appcndix A of this specification establishes basic selection and ii:stnllntion criteria for the application of zinc (typ
3、e ZEP, ZRN, and ZDM) and j roi1 coi-i-osiori preventive anodes to copper, nickel, or iron alloy components of :,li j pboai-t! condensers and heat exchangers. This specification covers the threaded 11! tict 1; as support. plugs for types ZRN and ZDM zinc anodes conforming to MIL-A- ! “(01 .iii i ron
4、anodes. ? Classification. The support plugs for heat exchanger zinc or iron :-,dc .i i11 be of the following types and classes as specified (see 6.2): Anode designation: Type I - (for use with ZRN or iron anodes). Type II - (for use with ZDM anodes). P1 up, thread designation : Class A - Straight th
5、read O-ring seal. Class B - Tapered pipe thread (replacement use only not for new Class C - Straight thread O-ring plugs for MS16142 or SAE J 1926 construction). type boss. - _ _ - _ _ - _I_ - - 4 , I , i i(lili li; i i t coiiiiiiiiidcit ioiis , 1(1(1j ioiic, (12.1 nt 1 oii, 1 ciiid aiiy pertinent ,
6、I KI 11 ni,y I)t oi tise in improving this document should be addressed to: i,oiiiin1:3i1ui i, Naval Sea Systems Command, SEA 5523, Department of the Navy, Washington, DC 20362-5101 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this
7、document or by letter. AMSC N/A FSC 5340 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited, I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-19521B 53 D 999990b O528744 8 D 2. APPLICABLE DOCUMENTS 2.1 Government
8、documents. 2.1.1 SDecifications. standards and handbooks. The following specifications, standards and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Index
9、 of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS FEDERAL PPP- F- 320 - Fiberboard: Corrugated and Solid, Sheet Stock (Container Grade) and Cut Shapes. MILITARY MIL-S-196 - Support Items, Accessories and Kits, Mechanical; MIL-S-1222
10、 - Studs, Bolts, Hex Cap Screws, Socket Head Cap MIL-(2-15726 - Copper-Nickel Alloy, Sheet, Plate, Strip, Bar, Rod MIL-A-18001 - Anodes, Sacrificial Zinc Alloy MIL-L-19140 - Lumber and Plywood, Fire Retardant Treated. Packaging of. Screws and Nuts. and Wire. STANDARDS FEDERAL FED-STD-H28 - Screw-Thr
11、ead Standards for Federal Services. FED-STD-H28/7 - Pipe Threads, General Purpose. MILITARY MIL-STD-792 - Identification Marking Requirements for Special MS 16 142 - Boss, Gasket Seal Straight Thread Tube Fitting, Purpose Components. Standard Dimensions for. (Unless otherwise indicated, copies of fe
12、deral and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Bldg. 4, Sec. D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) , 2.1.2 Other Government documents, drawings. and Publications. The following other Government documents, drawin
13、gs, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-HIL-A-1952LB 53 D 999990b 0528745 T D MIL-
14、 A - 1 Q 5 ? 1 H i Ski DRAWINGS NAVAL SEA SYSTEMS COMMAND (NAVSEA) NAVSEA 803-5959186 - Submarine Heat Exchanger Anode Plugs. NAVSEA 803-4385176 - FW/SW Standard Anode Plug Design. (Application for copies should be addressed to Commander, Portsmouth Naval Shipyard, Naval Engineering Drawing Support
15、Activity, Code 202.2, Portsmouth, NH 33801. ) 2.2 Non-Government Dublications. The following documents form a part of this document to the extent specified 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 s
16、olicitation. 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 IRON AND STEEL INSTITUTE (AISI) Steel Products Manual (Application for copies should be addressed to the American Iron and Steel Ins
17、titute, 350 Fifth Avenue, New York, Ny 10017.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) B 151 - Standard Specification for Copper-Nickel-Zinc Alloy B 164 - Standard Specification for Nickel-Copper Alloy Rod and Bar. (Nickel Silver) and Copper-Nickel Rod and Bar. (Metric) (DOD adopted) (Appl
18、ication for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) SOCIETY OF AUTOMOTIVE ENGINEERS, INC (SAE) J 1926 - Specification for Straight Thread O-Ring Boss Port (Application for copies should be addressed to the Society of Au
19、tomotive Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15086.) (Non-Government standards and other publications are normally available from 1 the organizations that prepare or distribute the documents. These documents also may be available in or through libraries or other informational ser
20、vices.) I 2.3 Order of Drecedence. In the event of a conflict between the text of . this document 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
21、, supersedes Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MI I*- il 19 52 1B (SH) Copper-nickel alloy, Nickel-copper alloy alloy 715 (70-30) 3. REQUIREMENTS ASTM B 151 or ASTM B 164 MIL-C-15726 3.1 Anode design. selection and installation. The des
22、ign, selection and installation of anodes shall meet the requirements of appendix A. Support plugs for use aboard submarines and for reactor plant components must also meet the requirements of NAVSEA Drawings 803-5959186 and 803-4385176 respectively. 3.2 Design reauirements for anode support plugs.
23、Design requirements for anode support plugs shall be as follows: 3.2.1 Materials. Materials for class A and C anode support plugs shall be in accordance with table I (see 6.2). TABLE I. Class A and C material. I Ma ter ia1 Specification 3.2.1.1 Materials for class B anode support plugs shall be in a
24、ccordance with table II (see 6.2). TABLE II. Class B material. I I Material Specification MIL-C-15726 Copper-nickel alloy, MIL- C - 15726 composition (90-10) I I 3.2.2 Sumort plug sizes. dimensions and tolerances. Plugs shall conform to the sizes, dimensions, and tolerances specified herein (see 6.2
25、) and as shown on figures 1 through 6. 3.2.3 Threads. Plugs shall be threaded as indicated on figures 1 through 6 and in accordance with FED-STD-H28, 3.2.3.1 The plug threads shall be sharp and clean and shall be concentric with the axis of the fitting. 3.2.3.2 The internal threads shall be counters
26、unk at the end a distance of not less than one-half the pitch of the thread and at an angle of about 45 degrees with the axis of the thread. For class B plugs, the external thread shall also be chamfered in a like amount for the purpose of easier entrance in making these joints and for the protectio
27、n of the threads. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-19521B 53 m 90b 0528747 3 m I I MIL-A-l9521B(SH) 3.3 Detail of heads. The tops of the plugs shall be flat and chamfered. The mgle of chamfer with the top surface shall be 30 de
28、grees and the diameter of the :op circle shall be the maximum width across flats, within a tolerance of minus 15 lercent . 3.3.1 Class A and C plugs shall have provision for positive locking by gir ing . 3.4 Hvdrostatic. The plugs shall show no evidence of leaking water or sweat at any part of the s
29、urface when tested as Specified in 4.3. 3.5 Marking. The size (external thread), the manufacturers name or zrademark, and the generic name and composition of the material used (for example, hNi 70/30), shall be permanently marked on the top surface of the head. Marking shall be in accordance with MI
30、L-STD-792. 3.6 WorkmanshiR. The plugs shall be sound, true to form, uniform in They shall be thoroughly cleaned both inside and outside. texture, and free from porosity or any other defect which might affect their serviceability. burrs and roughness shall be removed, Any 4. QUALITY ASSURANCE PROVISI
31、ONS 4.1 Responsibilitv 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 specified herein. Except as otherwise specified in the contract or purchase order, the con
32、tractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in this specification where such inspections are deemed ne
33、cessary to ensure supplies and services conform to prescribed requirements. 4.1.1 Responsibility for compliance. All items shall 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 progr
34、am. The absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility of ensuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling inspection as part of the manufacturi
35、ng operations, is an acceptable practice to ascertain conformance to requirements, however, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to accept defective material. 4.2 Oualitv conformance inspection. Quality conforma
36、nce inspection shall consist of the examinations specified in 4.2.2 and 4.2.3 and the test specified in 4.3. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Yi:. A lu521B(SH) 4.2.1 m. Plugs of the same tvpr and size offered for delivery at one time
37、 shall be considered a lot for purpose of inspection. 4.2.2 Visual examination. Each plug shall be visually examined to verify compliance with those requirements of this specification not involving testing. Any plug in the sample containing one or more visual defects shall not be offered for deliver
38、y. 4 verify sample for de 4 sample 2.3 Dimensional examination. Each plug shall be dimensionally examined to conformance with dimensional requirements of this specification. Any plug which does not meet the dimensional requirements shall not be offered ivery . 3 Hvdrostatic test. As a minimum, the c
39、ontractor shall randomly select a quantity from each lot of plugs in accordance with table III and subject them to the tests of 4.3.1 and 4.3.2. The sample size depends on the lot size. If one or more plugs fail the test, the entire lot shall be rejected. contractor has the option of screening 100 p
40、ercent of the rejected lot for the defective characteristics, or providing a new lot, which shall be tested in accordance with the sampling plan contained herein. for a period of 3 years after contract completion, records of tests, inspections, The The contractor shall maintain and any resulting rej
41、ections. TABLE III. Sample size for hvdrostatic test. Lot size 2 9 91 151 501 1201 3201 10,001 35,001 281 to a to 280 to 90 to 150 to 500 to 1200 to 3200 to 10,000 to 35,000 to 150,000 Sample size Al 1 12 19 21 27 35 46 56 a 3a 4.3.1 Class A and C support DUPS. Class A and C support plugs shall be s
42、ubjected to a hydrostatic pressure of 1,500 pounds per square inch (lb/in2). This pressure shall be held for a minimum of 10 minutes to ensure that no leakage occurs. 4.3.2 Class B sumort Dlugs. Class B support plugs shall be subjected to a This pressure shall be held for a minimum of hydrostatic pr
43、essure of 750 Ib/in2. 10 minutes to ensure that no leakage occurs. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-l9521B( SH) I 6. NOTES 4.4 InsDection of Dackaeing. Sample packages and the inspection of packaging (preservation, packing and
44、marking) for shipment, stowage, and storage shall be in accordance with the requirements of section 5 and the documents specified therein. 5. PACKAGING (The packaging requirements specified herein apply only for direct Government acquisition. delivery requirements of referenced documents listed in S
45、ection 2, see 6.3.) For the extent of applicability of the packaging or preparation for 5.1 General. 5.1.1 Navv fire-retardant reauirements. (a) Lumber and Dlvwood. Unless otherwise specified (see 6.2), all lumber and plywood including laminated veneer material used in shipping container constructio
46、n 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 - non-weather resistant. Category I - general use. Category I - general use. (b) Fiberboard. Fiberboard used in
47、the construction of interior (uni; and intermediate) and exterior fiberboard boxes including intei-io: packaging forms shall conform to the class-domestic/fire-retard,iil* or class weather resistant/fire-retardant material requireinc.p:c as specified (see 6.2), of PPP-F-320 and amendments thereto 5.
48、2 Packaging reauirements. 5.2.1 PluEs. Plugs shall be preserved level A, B, C, or Commercial, pa;.!, (I level A, B, C or Commercial as specified (see 6.2) and marked in accordnricc. iit MIL-S-196 and applicable packaging acquisition options therein as specific.d i. I 6.2). 5.2.2 Anodes. Anodes shall
49、 be preserved level A, C, or Cornniei-ci .i 1 level A, B or Commercial as specified (see 6.2) and marked in accoi-d.iiii A-18001 and applicable packaging acquisitioning options therein as slw if 6.2). (This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.) 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,
