1、DOD-V-ZYb75 48 9777706 0275333 8 E - Z3-lq DOD-V-24675 (SH) 18 August 1986 MILITARY SPECIFICATION VALVES, BOILER BLOW SERVICE, This specification is approved for use Department of the Navy, and is availab Agencies of the Department of Defense. MONEL, SHIPBOARD USE within the Naval Sea Systems Comman
2、d, e for use by all Departments and 1. SCOPE 1.1 Scope. This specification covers 1-1/2 inch monel (nickel-copper) valves for use in boiler blow systems other than the first valve off of boiler drums and headers, 600 and 1500 pounds per square inch (lb/in2) service. 1.2 Classification. Monel valves
3、shall be of the straightway and angle design and shall be of the following types, as specified (see 6.2.1). J Type 1 - Flanged globe, T pattern, 600 lb/in2 service - Type II - Flanged angle, 600 lb/in2 service Type III - Flanged globe stop check, T pattern, 600 lb/in2 Type IV - Flanged angle stop ch
4、eck, 600 lb/in2 service Type V - Flanged globe, T pattern, 1500 lb/in2 service Type VI - Flanged angle, 1500 lb/inz service Type VI1 - Flanged globe stop check, T pattern, 1500 lb/in2 Type VI11 - Flanged angle stop check, 1500 lb/in2 service service service 2. APPLICABLE DOCUMENTS 2.1 Government doc
5、uments. 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 Specifications a
6、nd Standards (DoDISS) and supplement thereto, cited in the solicitation. 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 Navy, W
7、ashington, 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 4820 DISTRIBUTION STATEMENT A Approved for public release; distribution unlimited THIS DOCUMENT CONTAINS 1r-l PAGES. Prov
8、ided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-V-24b75 48 777770b 0275334 T m DOD-V-24675(SH) Y SPECIFICATIONS FEDERAL QQ-C -5 23 QQ-N - 28 1 QQ -N- 2 86 QQ-N- 288 Pi I LITARY MIL-V-3 MIL-S-901 6; MIL-R-17131 MIL-G-21032 MIL-P-24503 STANDARDS MILITA
9、RY MIL-STD-105 - Copper Alloy Ingots; Brass (Yellow, High Strength) Manganese and Manganese-Aluminum- Bronze (for Remelting). Strip, Wire, Forgings, and Structural and Special Shaped Sections. - Nickel-Copper Alloy Bar, Rod, Plate, Sheet, - Nickel-Gopper-Aluminum Alloy, Wrought. - Nickel-Copper Allo
10、y and Nickel-Copper-Silicon Alloy Castings. - Valves, Fittings, and Flanges (Except for Systems Indicated Herein); Packaging of. - Shock Tests, H.I. (High-Impact); Shipboard Machin- ery, Equipment and Systems, Requirements for. - Rods and Powders, Welding, Surfacing. - Gaskets, Metallic-Asbestos, Sp
11、iral Wound. - Packing Material, Graphitic, Corrugated Ribbon or Textured Tape and Preformed Rings. - Sampling Procedures and Tables for Inspection by Attributes. MIL-STD-167-1 - Mechanical Vibrations of Shipboard Equipment (Type I - Environmental and Type II - Inter- nally Excited). MIL-STD-271 - No
12、ndestructive Testing Requirements for Metals. MIL-STD-278 - Fabrication Welding and Inspection; and Casting Inspection and Repair for Machinery, Piping and Pressure Vessels in Ships of the United States Navy. 2.1.2 Government drawing and publication. The following Government drawing and publication
13、forms a part of this specification to the extent specified herein. Unless otherwise specified, the issues shall be those in effect on the date of the solicitation. DRAWING NAVAL SEA SYSTEMS COMMAND (NAVSEA) 803-1385620 - Handwheels for Valves. PUBLICATION NAVAL SEA SYSTEMS COMMAND (NAVSEA) S9253-AD-
14、MMO-O1O/VLVMAN - Valve Manual for 1200 and 600 PSI Steam Propulsion Systems. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-V-ZLIb75 L(d - 7779906 0275335 3 W DOD-V-24675(SH) (Copies of specifications, standards, drawings, and publications req
15、uired by contractors in connection with specific acquisition functions should be obtained from the contracting activity or-as directed by the contracting activity). O 2.2 Other publications. The following documents form a part of this speci- fication to the extent specified herein. Unless otherwise
16、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 of documents not listed in the DoDISS shall be the issue of the nongovernment documents which is current on the date of
17、the solicitation. ANERICAN NATIONAL STANDARDS INSTITUTE (ANSI) B16.5 - Steel Pipe Flanges and Flanged Fittings. (DoD adopted) B16.34 - Valves - Flanged and Buttwelding End. (DoD adopted) (Application for copies should be addressed to the American National Standards Institute, 1430 Broadway, New York
18、, NY 10018.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) B 164 - Standard Specification for Nickel-Copper Alloy Rod, Bar, B 564 - Standard Specification for Nickel Alloy Forgings. and Wire. (DoD adopted) (DoD adopted) (Application for copies should be addressed to the American Society for Test
19、ing and Materials, 1916 Race Street, Philadelphia, PA 19103.) (Nongovernment standards and other publications are normally available from the organizations which prepare or which distribute the documents. These documents also may be available in or through libraries or other informational services.)
20、 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein (except for associated detail specifications, specification sheets or MS standards), the text of this speci- fication shall take precedence. Nothing in this specification, howe
21、ver, shall supersede applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified in the contract or purchase order, a sample shall be subjected to first article inspection (see 4.3 and 6.3). 3.2 Materials. Materials shall be as spe
22、cified in table I or shall be of equal or superior properties for the intended pressures and temperatures, and shall be selected so as to prevent galling, seizing or excessive wear on operat- ing parts. Clearances shall be such as to prevent interferences due to thermal expansion. The valves shall b
23、e used for handling and continuous use with boiler water. Boiler water for the purpose of this specification is water having 500 parts per million (p/m) undissolved boiler sludge and 1150 p/m dissolved solids of which 500 p/m may be chlorides. parts not specified in this specification and the substi
24、tution of any of the The suitability of the material of all other 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-V-24675 48 W 9997906 02753Lb 3 Mat er i a 1 v Nicke 1 -copper specified material for a better material shall be subject to review
25、by the Command or activity concerned and then its suitability shall be demonstrated by satisfactory performance of the valves during the tests specified in 4.3. Specification QQ-N-288, comp E TABLE I. Valve assembly material. Name of part Body bonnet Valve disc Valve stem Valve seat Stuffing boxes a
26、nd glands Bolts, studs cap screws Nuts Gaskets Packing Nickel-copper Nickel-copper-aluminum Cobalt-chromium Nickel-copper Nickel-copper-aluminum Nickel-copper Spiral wound QQ-N-28 1 QQ-N-286 - class A, age hardened (RC24-32) MIL-R-17131 ASTM B 164 ASTM B 564 (UNS N04400) QQ-N-286, class A QQ-N-281,
27、class B MIL-G-21032, type I I 1 Graphite I MIL-P-24503 3.2.1 Bodies, bonnets, and yoke retaining rings. Bodies, bonnets and yoke retaining rings shall be of nickel-copper alloy (monel) conforming to QQ-N-288, compos it ion E. 3.2.2 Valve stems. Valve stems shall be of nickel-copper aluminum alloy in
28、 accordance with QQ-N-286, class A, age hardened (RC24-32). 3.2.3 Bolts, studs, cap screws, and nuts. Bolts, studs, and cap screws shall be nickel-copper-aluminum in accordance with QQ-N-286. Nuts shall be nickel-copper alloy in accordance with QQ-N-281, class B. 3.2.4 Handwheels. Handwheels shall b
29、e in accordance with Drawing 803-1385620. Handwheel material shall be aluminum alloy. Valves shall close by clockwise rotation of the handwheel when facing the handwheel. 4 i Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-V-2q675 98 7777706 0275
30、337 5 3.2.5 Hard seat (disc and seat). Valve seats and discs shall be faced by depositing a layer of cobalt-chromium alloy (Stellite) conforming to type MIL-RCoCr-A-1 or MIL-RCoCr-A-2 of MIL-R-17131 with a finish thickness of hard faced surface of not less than 3/32 inch or shall be solid Stellite d
31、iscs and seats. 3.2.5.1 Valve discs. Valve discs shall be nickel-copper alloy in accor- dance with QQ-N-281, with seating area faced with cobalt-chromium composition (see 3.2.5) deposited by welding to ensure a positive bond between it and the disc, or shall be solid cobalt-chromium composition. The
32、 valve disc shall be of the swivel attachment type. Stellite shall be applied to the interface areas between the disc, stem and disc holder where disc rotation can cause galling. The disc shall incorporate a blow deflector feature which successfully completes the 200 cycle performance test (see 4.6.
33、2.1) without seat damage (seat wear or wire drawing) and without seat leakage in excess of 15 cubic centimeters per hour (cm3/h). A hardened washer (500 brine11 minimum) or a pad of Stellite shall be buttered to the inside of the disc at the point of contact, to prevent galling. 3.2.5.2 Valve seats.
34、 Valve seats shall be an integral part of the valve body or may consist of a tubular insert welded into the body with sufficient body material provided to permit the fitting of renewable seats, if necessary. Vacuum braze seats are unacceptable. cobalt-chromium composition (see 3.2.5) or shall be sol
35、id Stellite. The seating surface shall be faced with 3.2.5.3 Stuffing boxes and glands. The packing gland shall conform to Adjustments of the ASTM B 164 and ASTM B 564 (UNS N04400). The stuffing box shall be accessible without removal of stem or valve from the piping system. packing gland shall ensu
36、re tightness under all operating conditions. stem stuffing boxes shall be of ample depth to hold at least five turns of packing. Valve 3.2.5.4 Packing and gaskets. Packing shall be graphite corrugated rib- bon and preformed rings and conform to types I and II, class 1 of MIL-P-24503. Packing install
37、ation shall be in accordance with appendix B of NAVSEA S9253-AD-MMO-O10/VLVMAN. MIL-G-21032. Gaskets shall be spiral wound in accordance with 3.2.6 Recovered materials. Unless otherwise specified herein, all equip- ment, material, and articles incorporated in the products covered by this speci- fica
38、tion shall be new and may be fabricated using materials 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
39、 of raw materials, as opposed to virgin raw materials. interpreted to mean that the use of used or rebuilt products is allowed under this specification, unless otherwise specifically specified. None of the above shall be 3.3 General design. The valves shall be one piece integral body contain- Valves
40、 shall be designed to withstand ing both the flanges and the valve body. nominal working pressures of 600 and 1500 lb/in2 and to ensure tightness under severe service. Valves shall be designed in accordance with ANSI B16.34. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted with
41、out license from IHS-,-,- DOD-V-2qb75 48 7777906 0275338 7 m DOD-V-24675(SH) I 3.3.1 Flange dimensions. The valve flange dimensions shall be in accor- dance with ANSI B16.5. For types I and III, inlet flange face to outlet flange face dimension shall be 9-1/2 inches. For types II and IV, the inlet f
42、lange face to the centerline and centerline to the outlet flange face dimension shall be 4-3/4 inches. For types V and VII, the inlet flange face to outlet flange face dimension shall be 12 inches. For types VI and VIII, the inlet flange face to centerline and centerline to outlet flange face dimens
43、ion shall be 6 inches. I 3.3.1-1 Flange finish. The gasket contact surfaces of flanges shall be finished with a circular lay (concentric or phonographic) having roughness not exceeding 500 roughness height rating (RHR) produced by machining cuts of 0.003 inch maximum depth but not less than 40 cuts
44、per inch of face width. 3.3.1.2 Assembly dimensional tolerances. The flanged end connections shall be perpendicular to the centerline of the valve in both the X and Y axis. The maximum allowable tolerance is plus or minus 1/16 inch. The flange bolt holes shall be equally spaced and pairs of bolt hol
45、es shall straddle the vertical centerline of the valve. The maximum allowable flange rotation is plus or minus 1/16 inch. Flange dimensions shall be in accordance with ANSI B16.5, 600 and 1500 lb/inz as applicable. 3.3.2 Flow characteristics. Valves shal.1 have an unrestricted area through the valve
46、s, with the valves in the full open position, and through all body pas- sages. with annex A of ANSI B16.34. equivalent length of pipe. The minimum diameter of the body passages and seats shall be in accordance The pressure drop shall not exceed 30 feet 3.3.3 Valve bonnets. Valve bonnets shall be fla
47、nged and secured by bolts or studs and nuts or cap screws. The valve bonnet alignment shall be obtained by body guiding, that is, a close tolerance fit between bonnet and valve body. The manufacturer shall demonstrate ease of bonnet removal for valve repair. Bonnet flange face design shall assure pr
48、oper compression of flange gasket when flanges are drawn up metal to metal. 3.3.4 Yokes. Valves shall be of the outside screw and yokes construction. Unless otherwise specified (see 6.2.1), yoke shall be integral with the bonnets. The yoke shall be fitted with a bushing, threaded to fit the stem. bu
49、shing material shall be manganese bronze, alloys B or E of QQ-C-523. The yoke 3.3.5 Stems. Valves shall have rotating stems with self-locking Acme threads. Stems shall turn clockwise to close the valve. 3.3.5.1 Stem angle. centerline through the outlet flange shall be within the range of 45 to 50 degrees. The angle between the centerline of the stem and the 3.3.6 Valve passage. The passage through the valves shall give a smooth flow through the valves without any abrupt changes in the
