1、pEE3WI MIL-S-l7849E(SH) 19 March 1992 SUPERSEDING 2 April 1973 MIL-S-l7849D(SHIPS) MILITARY SPECIFICATION STRAINERS, SEDIMENT, PIPELINE, DUPLEX (WITH AND WITHOUT MAGNET) This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all D
2、epartments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers duplex strainers for use in lubricat- ing, diesel, fuel oil and sea water cooling systems. 1.2 Classification. Duplex strainers should be of the following types and classes as specified (see 6.2): Typ
3、e I - With magnet. Class 1 - Steel body, 30 mesh basket; lubricating oil service, Class 2 - Non-ferrous body, 80 mesh basket; lubricating oil Class 3 - Non-ferrous body, 30 mesh basket; lubricating oil Class 4 - Steel body, 80 mesh basket; lubricating oil service, maximum temperature 220F. service,
4、maximum temperature 220OF. service, maximum temperature 220F. maximum temperature 220OF. 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, Departmen
5、t 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 document or by letter. AMSC N/A FSC 4730 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot
6、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-13849E r(? D 9999906 O509258 3 = MIL-S-l7849E(SH) Class 5 - Non-ferrous body, 40 micrometer absolute filtration; lubricating oil service, maximum temperature 220F. Class 6 - Steel body, 40 micrometer absolute filtr
7、ation; lubricating oil service, maximum temperature 220OF. Class 7 - Non-ferrous body, 25 micrometer absolute filtration; lubricating oil service, maximum temperature 220F. Class 8 - Steel body, 25 micrometer absolute filtration; lubricating oil service, maximum temperature 220F. Type II - Without m
8、agnet. Class 1 - Steel body, 30 mesh basket, diesel oil, marine transfer service, maximum design pressure 100 pounds per square inch (psi), maximum temperature 120F. Class 2 - Non-ferrous, 1/8 inch perforated plate basket, sea water cooling service, design pressure 50 to 220 psi, maximum temperature
9、 120F. Class 3 - Steel body, 24 mesh basket, fuel oil service, maximum design pressure 350 psi, maximum temperature 120F. Class 4 - Steel body, 80 mesh basket, fuel oil service, maximum design pressure 600 psi, maximum temperature 120OF. Class 5 - Non-ferrous body, 40 micrometer absolute filtration;
10、 lubricating oil service, maximum temperature 220F. Class 6 - Steel body, 40 micrometer absolute filtration; lubricating oil service, maximum temperature 220OF. Class 7 - Non-ferrous body, 25 micrometer absolute filtration; lubricating oil service, maximum temperature 220F. Class 8 - Steel body, 25.
11、micrometer absolute filtration; lubricating oil service, maximum temperature 220F. I 2. APPLICABLE DOCUMENTS 2.1 Government documents. The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of the specifica- tion to the extent specified. 2.
12、1.1 SDecifications. standards, and handbooks. The following specifica- tions, standards, and handbooks form 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 Specificat
13、ions and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS FEDERAL QQ-(3-390 - Copper Alloy Castings (Including Cast Bar). QQ-N-281 - Nickel-Copper Alloy Bar, Rod, Plate, Sheet, Strip, Wire, Forgings, and Structural and Special Shaped Sections. PPP-B-1055
14、 - Barrier Material, Waterproof, Flexible. PPP-F-320 - Fiberboard: Corrugated and Solid, Sheet Stock (Container Grade), and Cut Shapes. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILITARY MIL-P-116 MIL-B-121 MIL- S - 901 MIL-G-1149 MIL-S-1222
15、MIL-F-8815 MIL-P-15024 MIL-P-15024/5 MIL-C-15726 MS18229 MIL-L-19140 MIL-F-20042 MIL-R-22191 MIL-S-22698 MIL-S-24093 MIL-P-24396 MIL-B-24480 MIL-V-24586 MIL-C-24707 MIL-C-24707/1 MIL-C-24707/3 MIL-C-24723 MIL-R-83248 - Preservation, Methods of. - Barrier Material, Greaseproofed, Waterproofed, - Shoc
16、k Tests, H.I. (High-Impact) Shipboard Flexible, Machinery, Equipment, and Systems, Requirements For. Durometer Hardness. Screws, and Nuts. Hydraulic Line, 15 Micron Absolute and 5 Micron Absolute, Type II Systems. Equipment. - Gasket Materials, Synthetic Rubber, 50 and 65 - Studs, Bolts, Hex Cap Scr
17、ews, Socket Head Cap - Filter and Filter Elements, Fluid Pressure, - Plates, Tags and Bands for Identification of - Plates, Identification. - Copper-Nickel Alloy, Sheet, Plate, Strip, Bar, Rod - Plug for O Ring Gasket. - Lumber and Plywood, Fire-Retardant Treated. - Flanges, Pipe and Bulkhead, Bronz
18、e (Silver Brazing) . - Barrier Materials, Transparent, Flexible, Heat Sealable. - .Steel Plate, Shapes and Bars, Weldable Ordinary Strength and Higher Strength: Structural. - Steel Forgings, Carbon and Alloy Heat Treated. - Packing Material, Braided TFE (Polytetrafluoro- - Bronze, Nickel-Alurninum (
19、UNS No. C95800) Castings - Valve, Needle, Size 1/4-Inch and 1/2-Inch, Union - Castings, Ferrous, General Specification for. - Castings, Ferrous, for Machinery and Structural - Castings, Ferrous, Corrosion-Resistant, Austenitic, - Castings, Nickel-Copper Alloy. - Rubber Fluorocarbon Elastomer, High P
20、erformance and Wire. ethylene). for Seawater Service. Bonnet Construction. Applications. Chromium-Nickel. Fluid, and Compression Set Resistant. STANDARDS MILITARY MIL-STD-278 - Welding and Casting Standard. MIL-STD-2073-1 - DOD Materiel Procedures for Development and Application of Packaging Require
21、ments. (Unless otherwiseindicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, BLDG. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 3 Provided by IHSNot for ResaleNo reproduction or networking permitted w
22、ithout license from IHS-,-,-2.1.2 Other Government documents, drawines. and Dublications. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation. I DR
23、AWINGS NAVAL SEA SYSTEMS COMMAND (NAVSEA) NAVSHIPS 803-2177525 - Valve Assemblies, 900 lb ANSI, BW NAVSHIPS 803-4384536 - Valves, Bronze 1/4 inch - 2 Inch Union NAVSEA 803-5001048 - Strainer, Duplex, Fuel Oil, Firesafe, NAVSEA 803-6397291 - Strainer Assembly, Duplex, Lube Oil, 6 inch. NAVSEA 803-639
24、7390 - Strainer Assembly, Duplex, Lube Oil, 2 inch. NAVSEA 803-6397396 - Strainer Assembly, Duplex, Lube Oil, 4 inch. and SW, 1/4 - 2 Inch. End Globe, Angle and Stop Check. 3 inch. I (Application for copies should be addressed to: Commander, Portsmouth Naval Shipyard, Code 202.2, Portsmouth, NH 0380
25、1.) 2.2 Non-Government oublications. The following document(s) 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 solicitation. Unless otherwise specified,
26、 the issues of documents not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN NATIONAL STANDARDS INSTITUTE, INC. (ANSI) B16.5 - Pipe Flanges and Flanged Fittings. (DoD adopted) (Application for copies should be addressed ta the American National Stan
27、dard Institute, Ino., 1430 Broadway, New York, NY 10018.) AMERICAN SOCIETY FOR TESTING AND MATERIALS,(ASTM) A 108 - Standard Specification for Steel Bars, Carbon, Cold A 167 - Standard Specification for Stainless and Heat-Resisting Finished, Standard Quality. (DoD adopted) Chromium-Nickel Steel Plat
28、e, Sheet, and Strip. (DoD adopted) A 216 - Standard Specification for Steel Castings, Carbon, Suitable for Fusion Welding, for High Temperature Service. (DoD adopted) Steel Bars and Shapes. (DoD adopted) Stainless Steel Pipes. (DoD adopted) Tapered for Structural Use. Rod, Bar, and Shapes. (DoD adop
29、ted) Shapes. (DoD adopted) A 276 - Standard Specification for Stainless and Heat-Resisting A 312 - Standard Specification for Seamless and Welded Austenitic A 595 - Standard Specification for Steel Tubes, Low-Carbon, B 124 - Standard Specification for Copper and Copper-Alloy Forging B 138 - Standard
30、 Specification for Manganese Bronze Rod, Bar, and 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASTM (Continued) B 139 - Standard Specification for Phosphor Bronze Rod, Bar, and B 369 - Standard Specificqtion for Casting, Copper Nickel Alloy. D 3
31、951 - Standard Practice for Commercial Packaging. (DoD adopted) Shapes. (DoD adopted) ( DoD adopted) (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
32、 available from the organizations that prepare or distribute the documents. These documents also may be available in or through informational services.) 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 associate
33、d detail specifications, 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 Firstarticle. When specified (s
34、ee 6.2), a sample shall be, subjected to first article inspection (see 6.4) in accordance with 4.3. 3.2 Recoveredmaterials. Unless otherwise specified herein, all equipment, material, and articles incorporated in the products covered by this specification shall be new and may be fabricated using mat
35、erials produced from recovered materials to the maximum extent practicable without jeopardizing the intended use. The term “recovered materials“ means materials which have been collected or recovered from solid waste and reprocessed to become a source of raw materials, as opposed to virgin raw mater
36、ials. None of the above shall be interpreted to mean that the use of used or rebuilt products is allowed under this specification unless otherwise specifically specified. 3.3 Design. (See 6.2). 3.3.1 General construction. Each strainer shall be of the duplex basket type with 3-way valves (inlet and
37、outlet valving) and constructed to be readily opened for examination, removal and cleaning of the baskets. The cross sectional area of the path of flow through the strainer shall be equal to or greater than the cross sectional area of the piping to which the strainer is connected. Each strainer shal
38、l be provided with shifting means to permit changeover (the act of shifting flow from one strainer basket to the other) without damage to any parts. Each strainer compartment shall have a set of vent and drain valves. 3.3.1.1 Chanrreover mechanism. This mechanism shall consist of an actuator and 3-w
39、ay valves (inlet and outlet valving). The 3-way valving shall be arranged so that one basket is fully open and the other is fully shut off at the same time and so that no contaminated fluid can pass from the inlet to outlet side of the 5 Provided by IHSNot for ResaleNo reproduction or networking per
40、mitted without license from IHS-,-,-strainer during changeover. The arrangement of the strainer shall be such that changeover shall be accomplished without interruption, even momentarily, of the full flow through the strainer. .A visual indicator shall be included to identify the basket in service.
41、3.3.1.1.1 Faualizine feature. Except for type II, class 2, strainers shall have an equalizing feature that slowly pressurizes the off duty strainer basket compartment at a flow rate not exceeding 10 gpm at design pressure. 3.3.1.1.2 Chaneeover actuator. Shifting for all strainers except type II, cla
42、ss 2 shall require a minimum of four complete rotations of a handwheel to require slow changeover and to enable return to the original basket in the event of a leak in the oncoming basket compartment. The connection of the changeover valve operator to the valve stem shall prevent improper attachment
43、 causing incorrect orientation of the operator to the valve. Thus, square changeover valve stem ends are not acceptable. Internal stops shall prevent inadvertent disruption of fluid flow due to improper positioning of changeover valve part. 3.3.1.1.2.1 $afetv interlock. Positive interlocks shall be
44、provided to prevent the following operator actions (not applicable to type II, class 2): (a) Changeover: Change over to an off-duty compartment when the off-duty compartment cover is off or when the drain and equalizing valves are open. pressurized. (b) Remove or loosen the cover when the compartmen
45、t is (c) Open the drain valve on the compartment in service. 3.3.1.1.3 heratine toraue. The maximum required force for any operation associated with shifting from one strainer basket to the other shall be less than 50 pounds (lbs) . 3.3.1.1.4 TvDe of chaneeover valves. Plug, ball and disc changeover
46、 valves in accordance with 3.3.1.1.4.1, 3.3.1.1.4.2, and 3.3.1.1.4.3 are approved for use in these strainers. 3.3.1.1.4.1 Plue changeover valves. Plug valves shall be of the non- lubricated, straight-cartridge type, capable of tight seating in both directions. The valve operating arrangement shall n
47、ot utilize a lift arrangement to unseat the plug before rotating, in order to reduce operating torque. Low friction fluoro- carbon or similar resin material shall be employed at rubbing surfaces to prevent sticking, and to provide low operating torque for ease of actuation. The plug ports shall be p
48、roperly aligned with the housing ports in all flow positions, and the plug shall not be raised or lowered by the line pressure. The valve shall be operable by one person. The valve shall be fully ported. The valve housing shall withstand the applied stresses developed during operation of the valve.
49、The valve shall be compatible with the fluid in the system. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-17. o Applicable Part Material document Bodies, bonnets and Steel castings MIL-C-24707/1 cover ASTM A 216 WCB Clamps, yokes, Steel ASTM A 595(A) valve operators ASTM A 108 Manganese bronze ASTM B 138 Glands Steel or cast MIL-C-24707/1 steel Corrosion- MIL-C-24707/3 resisting steel Chan
