1、c t a a 0 , MILITARY SPECIFICATION MIL-V-24586A(SH) 14 August 1985 SUPERSEDING MIL-V-24586(SH) 29 November 1978 VALVE, NEEDLE, SIZE 1/4-INCH AND 1/2-INCH, UNION BONNET CONSTRUCTION This specification is approved for use within the Naval Sea Systems Command, Department of the Navy, and is available f
2、or use by all Departments and Agencies of the Department of Defense. 1. SCOPE k 1.1 Scope. This specification covers the requirements of 1/4-inch and 1/2-inch sized needle valves. * 1.2 Classification. Valves shall be of the sizes, classes, styles and types, as specified (see 6.2.1). * 1.2.1 Classes
3、. Classes shall be as follows: Class I - Valve shall be rated for 1440 pounds per square inch (lb/in2) minimum at a temperature range of minus 20 to 100 degrees Fahrenheit (OF), and 1240 lb/in2 minimum at 200F. Class LI - Valve shall be rated for 6000 lb/in2 minimum at a temperature range of minus 2
4、0 to 100F, and 5160 lb/in2 minimum at 200F. * 1.2.2 Style. Styles shall be as follows: Style A - Inline globe. Style B - Angle globe. * 1.2.3 Type. Types shall be as follows: Type I - Stainless steel. Type II - Carbon steel. Beneficial comments (recommendations, additions, deletions) and any pertine
5、nt 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 Document Improvement Proposal (DD Form 1426) appearing at the end of this docum
6、ent or by letter. FSC 4820 DISTRIBUTION STATEMENT A Amroved for public release; distribution unlimited THIS DOCUMENT CONTAINS /o PAGES Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-E!458bA 48 777790b 0275042 3 m 2. APPLICABLE DOCUMENTS * 2.1
7、Government documents . * 2.1.1 Specifications and standards. The following specifications and standards form a part of this specification 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 of
8、 Specifications and Standards (DoDISS) and supplement thereto, cited in the solicitation. SPECIFICATIONS FEDERAL QQ-S-763 - Steel Bars, Wire, Shapes, and Forgings, Corrosion- Res i sting . MILITARY MIL-V-3 - Valves, Fittings, and Flanges, (Except for Systems Indicated Herein); Packaging of. MIL-S-90
9、1 - Shock Tests, H.I. (High-Impact); Shipboard luiachinery, Equipment and Systems Requirement for. STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes. MIL-STD-798 - Nondestructive Testing, Welding, Quality Control, Material Control and Identification and Hi-
10、Shock Test Requirements for Piping System Components for Naval Shipboard Use. (Copies of specifications and standards required by contractors in connec- tion with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer.) * 2.2 Other p
11、ublications. The following documents form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted shall be those listed in the issue of the DoDISS specified in the solicitation. Unless otherwise specified, the issues
12、of documents not listed in the DoDISS shall be the issue of the non- government documents which is current on the date of the solicitation. AMERICAN IRON AND STEEL INSTITUTE (AISI) Steel Products Manual (Application for copies should be addressed to the American Iron and Steel Institute, 1000 16th S
13、treet, NW, Washington, DC 20036.) 2 4 a a a a Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-245bA 48 7979706 0275043 5 W AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) B1.1 B16.11 - Forged Steel Fittings, Socket-Welding and Threaded. B46.1 - Su
14、rface Texture Surface Roughness, Waviness and Lay. - Unified Inch Screw Threads (UN and UNR Thread Form). (DoD adopted) (DoD adopted) (Application for copies should be addressed to the American National Standards Institute, 1430 Broadway, New York, NY 10018.) AMERICAN SOCIETY FOR TESTING AND MATERIA
15、LS (ASTM) A 105 - Standard Specification for Forgings, Carbon Steel, for Piping Components . A 108 - Standard Specification for Steel Bars, Carbon, Cold- Finished, Standard Quality. (DoD adopted) A 182 - Standard specification for Forged or Roiled Alloy-Steel Pipe Flanges, Forged Fittings, and Valve
16、s and Parts for High-Temperature Service. (DoD adopted) A 194 - Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High-Temperature Service. A 216 - Standard Specification for Steel Castings, Carbon, Suitable for Fusion Welding, for High Temperature Service. (DoD adopted) A 473 - S
17、tandard Specification for Stainless and Heat-Resisting Steel Forgings. (DoD adopted) A 582 - Standard Specification for Free-Machining and Heat- Resisting Steel Bars, Hot-Rolled or Cold-Finished. (DoD adopted) Chromium-Nickel, Nickel-Base, Corrosion Resistant, for General Application. (DoD adopted)
18、(DoD adopted) A 743 - Standard Specification for Castings, Iron-Chromium, Iron- (Application for copies should be addressed to American Society for Testing and Mnterials, 1916 Race Street, Philadelphia, PA 19103.) (Nongovernment standards and other publications are normally available from the organi
19、zations which prepare or which distribute the documents. ments also may be available in or through libraries or other informational services . ) These docu- * 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this
20、specifica- tion shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS * 3.1 Materials- Materials shall be as specified in table I. 3 Provided by IHSNot for ResaleNo reproduction or
21、 networking permitted without license from IHS-,-,-MIL-V-2458bA 48 W 77777Ob 0275044 7 W MIL-V-24586A(SH) TABLE I. List of materials. QQ-5-763, class 410 ASTM A 582, type 416 ASTM A 473, type 410 3.1.1 Recovered materials. Unless otherwise specified herein, all equip- ment, material, and articles in
22、corporated in the products covered by this specifi- cation shall be new and may be fabricated using materials prodwed from recovered materials to the maximum extent practicable without jeopardizing the intended use. The term “recovered materials“ means materials which have been collected or recovere
23、d from solid waste and reprocessed to become a source of raw materials, as opposed to virgin raw materials. 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. 3.2 Design. 3.2.1 Bonnet co
24、nstruction. Valve shall be union bonnet construction. 3.2.2 Back seat. Valve shall have a metal-tometal back seat. 3.2.3 End connections. Valve shall be socket welded with the socket inside dimensions in accordance with ANSI B16.11. 3.2.4 Yoke construction. Valve shall be an inside screw constructio
25、n. 3.2.5 Main seat body. Valve seats shall be integral with the body. 3.2.6 Main seat disc. Valve disc seating surface may be integral with the stem. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- I MIL-V-245bA 48 W 9977906 0275OLi5 7 End-to-end
26、(inches) Center-to-end (inches) Height (inches) I MIL-V-24586A(SH) 2-1 /4 - 2-7/8 - - 1-1 /8 - 1-1/2 4 4 5-1/2 5-112 3.2.7 Packing assembly and nut. Packing gland follower aiid packing nut shall be separate. Packing nut shall be threaded to permit packing adjustment. 3.2.8 Body-to-bonnet assembly. B
27、ody and bonnet assembly shall be body guided. 3.2.8.1 Body-to-bonnet joint. Body and bonnet joint shall be a metal-to- metal surface with a finish of 63 maximum in accordance with ANSI B46.1, or shall incorporate a deformable gasket. * 3.2.9 Dimensions. Maximum dimensions shall be in accordance with
28、 table II. TABLE II. Maximum dimensions. I I ll2-inch Size 1 /4-inch I 1 Style IA IB IA IB I NOTE: Height is measured with valve in open position, from socket centerline to top of handwheel. * 3.2.10 Flow coefficient. Valves shall be designed with a minimum flow coefficient (C,) of 0.4 for 1/4-inc.h
29、 valves, and 1.5 for 1/2-inch valves. * 3.2.11 Handwheel diameter and assembly. Handwheel shall be round, or of cross or tee-shape. Maximum diameter of handwheel shall be 3 inches. Handwheel shall be attached to the stem with a locknut to prevent loss of handwheel. 3.2.12 3.2.12.1 Body markings. Mat
30、erial identification shall be forged on the Body markings and identification information. body. * 3.2.12.2 Identification information. Identification information shall be attached to handwheel and stem by the handwheel locknut (see 3.2.11). alternative method, identification information may be attac
31、hed to or permanently marked on the valve body. If this method is used, the caution of (d) below shall appear on both sides of the valve body. Any permanent marking on the valve body shall be forged, cast, low stress die-stamped, or electroetched. Attachment of identification information, in any cas
32、e, shall not result in any loose parts and shall not interfere with valve operation. Identification information shall include the following: As an (a) (b) (c) (d) Indicate on nameplate; CAUTION: Manufacturers name and model number on identification plate Pressure rating and size on body. Body materi
33、al specification on body. Stem must be back seated against the bonnet prior to and during assembly of valve. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-245bA 4 m 9399706 0275046 O m 3.2.13 Main seat leakage. Maximum permissible seat leak
34、age rate shall be 10 milliliters (mL) per hour at rated pressure. clean tap water except cutting oil may be present. Pressure shall be applied to the underside of the disc. The testing fluid shall be 3.2.14 Shock. Valves furnished in accordance with this specification shall conform to grade A, class
35、 1, type C of MIL-S-901 and MIL-STD-798. * 3.2.14.1 Acceptance criteria for shock test shall be as follows: (a) (b) Permanent deformation, misalignment, and functional impairments (c) Permissible aeat leakage shall be as specified in 3.2.13. Momentary malfunction at the time of the impact blow is pe
36、r- mitted and acceptable. shall be cause for rejection. 3.2.15 Threaded parts. Threaded parts shall be in accordance with ANSI B1.1. 3.2.16 Operating force. Valves shall open and close fully with a tangen- tial force at the handwheel rim of 50 pounds or less. * 3.2.17 Shell pressure. Class I valves
37、shall be designed to withstand a minimum hydrostatic shell test pressure of 2175 lb/in2, shall withstand a minimum hydrostatic shell test pressure of 9000 lb/in2. Class 11 valves 3.2.18 Drawings. The contractor shall prepare drawings in accordance with the data ordering document included in the cont
38、ract or order (see 6.2.2). * 3.2.19 Repair parts. Valves shall be designed such that the only repair parts required are gaskets (if used) and packing. such that special tools are not required for installation and repair. Valves shall be designed 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for
39、 inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements as specified herein. fied in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance
40、 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 the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. E
41、xcept as otherwise speci- * 4.1.1 Responsibility for compliance. All items must 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. absence of any inspection requirements in the
42、 specification shall not relieve the contractor of the responsibility of assuring that all products or supplies sub- mitted to the Government for acceptance comply with all requirements of the contract. Sampling in quality conformance does not authorize submission of known defective material, either
43、 indicated or actual, nor does it commit the Government to acceptance of defective material. The 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-o a o -. MIL-V-2q5bA LIB m 777770b 0275047 2 * 4.1.2 Inspection system. The contractor shall provide an
44、d maintain an inspection system in accordance with the contract or order (see 6.2.1). 4.2 Quality conformance inspection. Quality conformance inspection shall consist of the examination of 4.3 and the tests specified in 4.4. * 4.2.1 - Lot. Valves of the same size, style and type (see 1.2) offered fo
45、r delivery at the same time and manufactiired within the preceding 12 months shall be considered a lot for purposes of sampling. 4.2.2 Sampling for visual and dimensional examination. Sampling of each lot for visual and dimensional examination specified in 4.3 shall be conducted in accordance with M
46、IL-STD-105, general inspection level II, AQL 2.5 percent, 4.3 Visual and dimensional examination. Sample valves shall be visually and dimensionally examined to determine conformance with the specified design, inclusion of all required parts, proper assembly, the existence of proper markings and dime
47、nsions specified on the applicable specifications and standards. 4.3.1 The Defense Contract Administration Services Management Area (DCAW) shall normally accept certification that parts conform to their applicable material specification providing the certification contains actual test results. Certi
48、fications representing stocks more than 1 year old are not acceptable. 4.4 Tests. 4.4.1 Shock. Valve design shall be shock tested n accordance with MIL-S-901 and MIL-STD-798 to assure compliance with the requirements specified in 3.2.14 and 3.2.14.1. 4.4.2 Shell pressure test. Each valve shall be hy
49、drostatically tested to assure compliance with the requirements specified in 3.2.13 and 3.2.17. * 4.4.3 Seat leakage test. Seat leakage testing shall be conducted to assure compliance with the requirements specified in 3.2.13. 4.5 Shock test report. The contractor shall prepare a shock test report in accordance with the data ordering document included in the contract or order (see 6.2.2). * 4.6 Inspection of packaging. Sample packages and packs, and the
