1、t I l l r ! t MIL-H-15787F Ltlt 9999906 0211572 9 IINCH-POUND MIL-H-l5787F(SH) 2 September 1988 SUPERSEDING 10 March 1955 (See 6.8) MIL-H-I5787E(SHIPS) MILITARY SPECIFICATION HEATERS (TANKS), FLUID, DEAERATING, BOILER FEED WATER, NAVAL SHIPBOARD USE o This specification is approved for use by the Na
2、val Sea Systems Command, Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers deaerating feed tanks for Naval shipboard applications, surface ships only. 1.2 Classification. Deaerating feed tanks
3、shall be of the following types as specified (see 6.2.1): Type I - With surface (straight or U-bend tube) vent condenser. Type II - With direct contact (spray) vent condenser. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. The following specifications and stand
4、ards 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 and Standards (DoDISS) and supplement thereto, cited in the solicitation. Beneficia
5、l 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 Document Impr
6、ovement Proposal (DD Form 1426) appearing at the end of this document or by letter. / THIS DOCUMENT CONTAINS PAGES. AMSG N/A FSC 4420 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited Provided by IHSNot for ResaleNo reproduction or networking permitted without license
7、from IHS-,-,-MIL-FL577F 44-M 777970b 02LLC73 O MIL-H-l5787F(SH) SPECIFICATIONS FEDERAL HH - P - 15 1 QQ-N-281 QQ-N-286 QQ-N-288 PPP-B-636 PPP-F-320 MILITARY MIL- P- 116 MIL- S - 901 MIL-S-1222 MIL-T-15005 MIL-P-15024 - Packing; Rubber-Sheet, Cloth-Insert. - Nickel-Copper Alloy Bar, Rod, Plate, Sheet
8、, Strip, Wire, Forgings, and Structural and Special Shaped Sections. - Nickel-Copper-Aluminum Alloy, Wrought (UNS N05500). - Nickel-Copper Alloy and Nickel-Copper-Silicon Alloy - Boxes, Shipping, Fiberboard. - Fiberboard; Corrugated and Solid, Sheet Stock Castings, (Container Grade), and Cut Shapes.
9、 - Preservation, Methods of. - Shock Tests, H.I. (High-Impact); Shipboard - Studs, Bolts, Hex Cap Screws, Socket Head Cap - Tubes, 70-30 and 90-10 Copper Nickel Alloy, - Plates, Tags and Bands for Identification of Machinery, Equipment and Systems, Requirement for. Screws and Nuts. Condenser and Hea
10、t Exchanger. Equipment. MIL-P-l5024/5 - Plates, Identification. MIL- C - 15 7 26 MIL-E-15809 MIL-1-17244 MIL-G-18997 MIL-L-19140 MIL-1-20037 MIL-V-20065 MIL-G-24696 STANDARDS FEDERAL FED-STD-H28 MILITARY - Copper-Nickel Alloy, Rod, Flat Products (Flat Wire, Strip, Sheet, Bar, and Plate) and Forgings
11、. - Expander, Tube, Condenser and Heat Exchangers. - Indicators, Temperature, Direct-Reading, Bimetallic, (3 and 5 Inch Dial). - Gauge, Pressure, Dial Indicating. - Lumber and Plywood, Fire-Retardant Treated. - Indicators, Sight, Liquid Level, Direct/Indirect - Valves, Angle, Pressure Relief, Naval
12、Shipboard, - Gaskets, Sheet, Non-Asbestos. Reading, Tubular Glass/Plastic. for Steam Service. - Screw-Thread Standards for Federal Services. . MIL-STD-167-1 - Mechanical Vibrations of Shipboard Equipment (Type I - Environmental and Type II - Internally Excited), MIL-STD-271 MIL-STD-278 MIL-STD-763 -
13、 Locking Devices. - Requirements for Nondestructive Testing Methods. - Welding and Casting Standard. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-35787F 4Li Ob 0233574 2 m (Application for copies should be addressed to the American Society f
14、or . I Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) I MIL-H-l5787F(SH) I - i MILITARY (Continued) MIL-STD-792 - Identification Marking Requirements for Special Purpose Components. MIL-STD-1186 - Cushioning, Anchoring, Bracing, Blocking and Waterproofing; with Appropriate Test Me
15、thods. DOD-STD-1399, - Interface Standard for Shipboard Systems, Ship MIL-STD-2073-1 - DoD Materiel Procedures for Development and Section 301 Motion and Attitude. (Metric) Application of Packaging Requirements. 2.1.2 Other Government drawing and Dublication. The following other 9 Government drawing
16、 and publication form 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. s DRAWING NAVAL SEA SYSTEMS COMMAND (NAVSEA) B-214 - Root Connections for Attaching Piping. PUBLICATION NAVS EA 0908-LP-
17、000-3010 - Shock Design Criteria for Surface Ships. (Copies of specifications, standards, drawings, and publications required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.) a 2.2 Other Dub
18、lications. 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 of
19、 documents not listed in the DoDISS shall be the issue of the nongovernment documents which is current on the date of the solicitation. AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME) Boiler and Pressure Vessel Code, Section VIII, Division 1. (Application for copies should be addressed to the Americ
20、an Society of Mechanical Engineers, 345 East 47th Street, New York, NY 10017.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) A 582 - Standgrd Specification for Free-Machining Stainless and Heat-Resisting Steel Bars, Hot-Rolled or Cold-Finished. B 584 - Stand? !Yoted) d Specification for Copper A
21、lloy Sand Castings for GenF$al Applications. (DoD adopted) (DoD adopted) D 3951 - SMdard Practice for Commercial Packaging. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) B26,5 - Pipe Flanges and Flange
22、d Fittings, (DoD adopted) (Application for copies should be addressed to the American National Standards Institute, 1430 Broadway, New York, NY 10018.) (Nongovernment standards and other publications are normally available from the organizations which prepare or which distribute the documents. docum
23、ents also may be available in or through libraries or other informational services.) These 2.3 Order of precedence. In the event of a conflict between the text of 4 this specification and the references cited herein (except for associated detail specifications, specification sheets or MS standards),
24、 the text of this specifi- cation shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained, II 3. REQUIREMENTS 3.1 First article. When specified in the contract or purchase order, a 3.2 Material. samp
25、le shall be subjected to first article inspection (see 4.4 and 6.3). Materials used in the construction of the tanks shall be as shown in table I. Under conditions of vertical shock the materials shall withstand the combined dynamic stress of weight of contained water plus design pressure, TABLE I.
26、Materials. Part Tube sheets Tubes Shell structure including internal baffles Spray valves and atomizing valves Spray valve and atomizing valve stems Vent condenser wa t erboxes Ma ter ia1 Copper-nickel alloy Copper-nickel alloy Nickel-copper Nickel-copper or Nickel-copper (K-monel) or Nickel-copper
27、castings Nickel-copper alloy or Corrosion-resistant steel . type 303 or 416 Bronze, sand castings alloy 905 or 922 Specification MIL-C-15726 MIL-T-15005 QQ-N- 28 1 QQ -N - 2 8 1 QQ-N-286 QQ-N-288 QQ-N-281 ASTM A 582 ASTM B 584 4 Provided by IHSNot for ResaleNo reproduction or networking permitted wi
28、thout license from IHS-,-,-MIL-H-l5787F(SH) TABLE I. Materials. - Continued Part askets : For metal temperatures less than 250F For metal temperatures 250F and greater Bolts, studs, and nuts: In contact with steam or water For other services Material Rubber, synthetic, class 1, grade 80 Non-asbestos
29、, sheet Nickel alloys Nickel alloys or copper alloys Specification HH-P-151 MIL-G-24696 MIL-S-1222 MIL-S-1222 3.2.1 Ultrasonic inspection. Nickel-copper material for the external pressure boundary of the deaerating feed tank shall be ultrasonically inspected in accordance with MIL-STD-271. Acceptanc
30、e criteria shall be in accordance with QQ-N-281. 3.2.2 Welding and allied processes. Welding and allied processes shall be in accordance with MIL-STD-278. 3.2.3 Recovered materials. Unless otherwise specified herein, all equip- ment, material, and articles incorporated in the products covered by thi
31、s specifi- cation 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 bec
32、ome 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. 3.2.4 Prohibiized materials. The following materials shall not be us
33、ed for service, manufacture, test or inspection of deaerating feed tanks. (a) (b) Carcinogenic materials. (c) Cadmium, magnesium or asbestos. Mercury (except fluorescent or mercury vapor lighting). 3.3 Connections. Location of connections shall be as specified (see 6.2.1). Root connections for attac
34、hing piping shall conform to Drawing B-214. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.4 Threaded Darts. Threads of threaded parts shall conform to FED-STDH28. Threaded fasteners and threaded machine elements, including setscrews, for use wh
35、ere continuous satisfactory operation under conditions of shock, vibration, and heat specified herein depends on maintenance of tight connections shall. be secured by locking devices, accordance with MIL-STD-763. screws are prohibited where they would be axially loaded in vertical shock, and their u
36、se discouraged wherever they would be axially loaded in shock. Locking devices shall be in Cap Use of tapered pipe threads is prohibited. . 3.5 Flannes. Flanges shall be of the same material as the attached piping. Flanges shall be dimensioned, drilled, and finished for use with compressed non- asbe
37、stos gaskets in accordance with ANSI B16.5. b 3.6 Nozzle neck thickness. Wall thickness of nozzle necks shall be the greater of that determined for the following: Li (a) Calculations based on shell thickness requirements for internal and external pressure and temperature in accordance with ASME Boil
38、er and Pressure Vessel Code, section VIII, division i. external piping. (b) Calculations based on stresses due to the effects of attached Loadings to be as specified (see.6.2.1). 3.7 Tank life. Tank life shall be as specified (see 6.2.1). Tank life shall include B Specified number of starts and stop
39、s during operating hours, Parts subject to heavy erosion shall have a tank life of a specified number of operating hours. 3.8 Tank form and material thickness. Tanks shall be as light and compact Unless otherwise specified (see as practical, consistent with their function. 6,2.1), tanks shall be cyl
40、indrical and fitted with ellipsoidal, torispherical, or hemispherical heads. Torispherical heads that have a knuckle radius less than 10 percent of the shell diameter shall have a skirt not less than 2 inches long, Structural attachments or openings shall not be 1ocate.d on or adjacent to the head k
41、nuckles, Unless otherwise specified (see 6.2.1), tanks shall be identical to one another, without left-hand or right-hand distinction. 3.9 SDace limits, The space envelope for the tank shall be as specified (see 6.2.1). 3.10 ODeratinP features, Operating features shall be as specified in 3.10.1 thro
42、ugh 3.10.4. 3.10.1 Heating and deaerating. The deaerating feed tanks shall be fully enclosed and shall transer heat from steam to water by direct contact or mixing. They shall heat the feedwater to the saturation temperature corresponding to the pressure at the top o the tank. The heated water shall
43、 be finally deaerated and distributed by positive energy operated spraying devices and shall be treated in free suspension that the deaeration is independent of ship attitude and motion within the limits specified in DOD-STD-1399, section 301, unless otherwise specified in the contract or purchase o
44、rder (see 6.2.1). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-15787F 44 7797906 021l1578 T W MIL-H-l5787F(SH) 3.10.1.1 Saturated steam systems. The deaerating feed tanks shall deaerate the feedwater to the extent that the residual oxygen sh
45、all be less than 0.007 parts per million (p/m) dissolved oxygen regardless of the concentration of oxygen in the influent water or steam. 3.10.1.2 SuDerheated steam systems. The deaerating feed tanks shall deaerate the-feedwater to the extent that the residual oxygen shall be less than 0.014 p/m dis
46、solved oxygen, with the upper limit of oxygen concentration in the influent water dependent on processing capacity of the tank as specified below: (a) Tank capacity 50,000 pounds per hour (lbfiour) or less. Oxygen (b) Tank capacity greater than 50,000 lbfiour. Oxygen concentration in concentration i
47、n influent water shall be less than 2500 p/m. influent water shall be less than 5000 p/m. 3.10.2 Load range. The tanks shall meet performance requirements under the specified conditions (see 6.2.1) for all loads between 3 and 125 percent of full load. 3.10.3 Pressure range. Tanks shall be operated a
48、t internal pressures that range between the tank operating pressure (see 6.2.1) and an internal absolute pressure of 12 pounds per square inch (lb/in2). subjected to an internal pressure equivalent to full vacuum, Tanks shall not suffer damage if 3.10.4 Feedwater storage. Below the deaerating zone,
49、the tank shall form a storage space for the specified amount of feedwater (see 6.2.1). This storage space shall be adequately baffled and sized to minimize swash and to prevent flash in the boiler feed pump suction under changing conditions of load, level, and pressure. removing corrosion products. a drain or blowdown connection in the tank bottom. connection shall be located away from the center of the bottom head. The water storage space shall incl
