1、MIL-B-L3LD r(4 9997706 Or(52225 9 D MIL-B-1838lD (SEIPS 23 September 1975 SUPERSEDING MIL-8-18381C (SHIPS) 20 August 1971 (SM 6.5) MILITARY SPECIFICATION BOILERS, STEAM, HIGH PRESSURE, NAVAL SHIP PROPULSION This specification is approved for use by the Naval Sea Systems Comaand and is available for
2、use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 This specification covers oil fired natural circulation water tube boilers, and their appurtenances, for generating oteam for propulsion of Naval ships. 2. APPLICABLE WCUMENTS 2.1 # The following docmnts of the issue in e
3、ffect on date of invitation for bid. or request for proposal, form a part of the specification to the extent specified herein. SPECIFICATIONS FEDERAL PPP-P-40 - Packaging and Packing of BMd Tools. MIL-C-717 - Castable Mix, Ftefractory , iiigh-Teqerature, Kydraulic Setting. MIL-S-901 - Shock Tests H.
4、I. (High-Impact); Shipboard Machinery, Equipmrnt and Systems, Riquirament8 For. MIL-B-1947 - Blowers , Soot (Shipboard Use). MIL-1-2002 - Indicators, Boiler Smoke, Naval Shipboard. MIL-B-2128 - Burner, Oil Pressura Atomizing. MIL-B-2678 - Brushes, Wire, Boiler Tuk (Expanding Type for Usa With Cleani
5、ng- MIL-1-2819 - Insulation Block, Thermal. MIL-V-2962 - Valves, Pressure Regulating, Boiler Fuel-oil. MIL-J-5624 - Jet Fuel, Grades JP-4 and JP-5. MIL-P-15024 - Plates, Tags and Band6 for Identification of Equipment. MIL-P-15024/5 - Plates, Identification. MIL-P-15137 - Provisioning Technical Docum
6、antation For Ropair Parts For MIL-B-15382 - Bolt, Firebrick Anchor. MIL-B-15606 - Bricks, Refractory, Naval Boiler Furnace Lining Quality. MIL-M-15842 - Mortar, Refractory (High T.mP.raturC, Air Setting). MIL-B-16008 - Brick, Insulation, High Temperature, Fire Clay. MIL-T-16286 - Tubes, Steel, Seaml
7、eis, Marine Boiler Application. MIL-B-16305 - Brick, Refractory, Insulating. MIL-G-16356 - Gagas, Boiler-Watu, Direct wading. MIL-F-16884 - Fu01 Oil, Diesel (Marine). MIL-T-17188 - Tubes, Carbon Steel, Rsistancm Welded, Marine Boiler. MIL-1-17244 - Indicators, Tanparature, Direct-hading Biawtallic,
8、(3 and 5 Inch Dial). MIL-T-17370 - Tuba and Flue Cleaner, Boiler, Internal, Air-Motor-Driven. MIL-V-17462 - Valve, Safety; Boiler (Shipboard Use). MIL-G-17489 - Gage, Pressure (Air) Boiler. MIL-V-17737 - Valvas, Boiler Blow (Shipboard Use). MIL-1-18997 - Indicator, Pressure, Panel Mounted or Cme Sup
9、ported, General WL-T-19646 - Thermomters, Renote Reading, Self-Indicating Dial, Gas Actuated. MIL-T-20157 - Tube and Pipe, Carbon Stwl, Seamless. MIL-1-22610 - Indicator, Ramote *ading Boiler Water Level. MILITARY Outfits, Boiler-Tube, Electric and Air-Motor-Driven) . Electrical and Mechanical Equip
10、ment (Naval Shipboard use). Specification. STANDARDS MILITARY MIL-STD-129 - Harking for Shipmnt and Storage. MIL-STD-278 - Fabrication Welding and Inspection; and Casting Inspoction and Repair for Machinery, Piping and Pressure Vessel8 in Ships of the United States Navy. PSC 4410 Licensed by Informa
11、tion Handling ServicesMIL-8-18 381D (SHIPS) MILITARY (con. ) MIL-STD-777 - Schedule of Piping, Valves, Fittings and Associated Piping MIL-STD-1362 - Procedures for Steam Purity Measureumnt Naval Propulsion Boilers. Components for Surface Ships. DRAWINGS MILITARY 5000-55102-1385784 - Brick, Refractor
12、y, For Marine Boilers. 5000-S5102-1385785 - Bolts, Clips and Strips for Anchoring Boiler Rbfractory 5000-S5102-841581 - Clamps or Boiler Casing and Doors. 810-1385708 - Burner Tile Refractory For Marine Boilers. 810-1385936 - Tile Baffle, Silicon-Carbide for Marina Boilers. 9000-S6202-73980 - System
13、e, Standards, Diagrame of Electric Plant Installa- Material. tions, Standard Methods. PUBLICATIONS MILITARY NAVSHIPS 250-423-30 - Shock Design of Shipboard Equipment Dynamic Analysis NAVSHIPS 250-423-31 - Shock Design of Shipboard Equipment Interim Design Method. Inputa for Submarino and Surface Shi
14、p Equipment. (Copies of specifications, standards, drawings, and publications required by suppliers in connection with spocific procunmnt functions should be obtained from the procuring activity or as directed by the contracting officer.). I 2.2 Other ublications. The following documents form a part
15、 of this specification to the extent - speci invitation for bids or reqwst for proposal shall apply. AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME) Unless otherwise indicated, the issue in effect on date of Boiler and ress su re Vessel Code, Section I - Rules for Construction of Power Boilers. SA-5
16、3 - Welded and Seamless Steel Pipe. SA-106 - Seaznless Carbon Steel Pipe for High-Tenperature Service. SA-193 - Alloy Steel Bolting Materials for High Tonperature Sorvice. SA-213 - Seamlass Ferritic and Austenitic Alloy Stool Boiler, Superheater and Heat SA-240 - Corrosion-Resisting Chromium and Chr
17、omium-Nickel Steel Plate, Sheet and SA-266 - Carbon Steel Seamless Drum Forgings. SA-268 - Seamless and Welded Ferritic Stainloss Steel Tubing for General Service SA-383 - Iaar and Intermdiate Tendle Strength Carbon-Steel Platas of Structural SA-335 - S.amless Ferritic Alloy Staal Pipe for High Temp
18、erature Service. SA-336 - Alloy Steel seamless Drum Forgings. SA-515 - Carbon Steel Plates of Intermediate Tonsila Strength for Fwion whlded Boilers and Other Pressure Vessels for Intermediate and igher Tempera- tun Sorvia. Exchanger Tubos. Strip for Fusion-elded Unfired Pressure Vaesolr. (Straight
19、Chromium Types). Quality. (Application for copies should be addremad to the American Society of Mechanical Engineers, United Engineering Center, 345 East 47th Streat, New York, N.Y. 10017.) AMERICAN SOCIETY POR TESTING AND MATERIALS (ASTM) A36 - Structural Steel. A569 - Steal, Carbon, Hot-Rolled She
20、et and Strip, Comercial. A588 - High Strength Low-Alloy Structural Steel. (Application for copies should e addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, Pennsylvania 1910 3. ) UNIFORM CLAGSXFICATION COMMITTEE Uniform Prmight Classification Rules. (Appli
21、cation for copies should be addressed to the Uniform Classification Committee, Room 1106, 222 South Riverside Plaaa, Chicago, Illinois 60606.) 2 Licensed by Information Handling ServicesMIL- B-1 a water level variation of not more than 4-inches above or below the normal operating water level; and a
22、superheater outlet temperature not to exceed the maximum safe operating steam temperature specified (see 6.1.1). These maneuvers shall be accomplished smokelessly with all burners in use utilizing full-power sprayer plates. specified (see 6.1.1), the cutting in and out of burners during these maneuv
23、ers shall be permitted. 3.2.7 In emergencies it shall be possible, without damage to the boiler, to light off from a cold condition and raise steam to the designed operating pressure, with electric power and diesel fuel oil available, within 40 minutes when superheater protection steam is used and w
24、ithin 60 minutes when protection steam is not used. The boiler shall be capable of being operated at all steaming rates up to and including the maximum boiler rating at 85 percent of the designed operating pressure. Between 50 and 85 percent of full-power operating pressure, the boiler shall be capa
25、ble of being operated at 50 percent of full-power steaming rate. The boiler shall also be capable of satisfactory operation at all rates under emergency cold feed conditions when feed water is supplied at 100F with resulting increase of super- heat temperature of no more than 50F above normal. main
26、generating bank after the superheater and approximately 5 percent of the superheater tubes can be plugged without limiting the ability of the boiler to deliver its designed full- power quantity of steam at the specified delivery pressure, (but not necessarily steam temperature) and without overheati
27、ng of other boiler parts to the extent that the safety and usefulness of the boiler would be jeopardized. 3.2.9 Boiler shall operate under all conditions specified herein when the ship is permanently trimmed down by bow or stern as much as 5 degrees from the nonna1 horizontal plane, permanently list
28、ed up to 15 degrees to either side of the vertical, pitching 10 degrees up or down from its normal horizontal plane, and rolling up to 45 degrees to either side of the vertical. Downcomer tubes shall not uncover under any of the above conditions. 3.2.10 Vibration. Boiler shall be designed and instal
29、led so that it will not be adversely affected by resonant vibration in range of frequencies caused by propeller blade excitation. 3.2.11 Chockproofness. The boiler shall meet grade A shock requirements of MIL-S-901. Any degradatomer after it has experienced the underwater shock tests, shall not prev
30、ent the boiler from being steamed at full-power continuously for 100 hours. The ships foundation, boiler footings, saddles, and holding down bolts, treating the boiler as a single mass system, shall be capable of withstanding static loads shock design numbers of 20 g in the vertical direction, 10 g
31、in the athwartship direction and 6 g in the fore and aft direc- tion. Where sliding feet are used to provide for expansion of the boiler, the base plates 4 +o .o Procedures for In case straight mechanical pressure atomizing burners are 3.2.8 The boi1.x shall be designed so that approximately 5 perce
32、nt of the tubes in the Licensed by Information Handling ServicesMIL-B-18 381D (SHIPS) shall be grooved on the fax ros-: - the phosphor bronze facing of. ships foundation for grease lubrication. Grease i.?: 47.2 piping shall be installed at a convenient location outside of the outer casi:. t ;e:*- -?
33、easing of the sliding feet. Material for saddles and boiler base plates s!-I;. LC .:i.* -1 of ACME SA-515 and holding down bolts shall be grade 0-7 of ASME SA-193. ?.e s :-der shall furnish the holciing down bolts which shall be fitted or body bound tyje LL:. Trie allowable stress in using the stati
34、c design metho8 for shock shall be the yicl; s:rer.:. $3.2 percent offset) of the material. Collision chocks shall be furnished by the SLLL-L:? or, ships foundation structure so that shock loads need not be entirely absorbcc uy tr.e bolting. t 3.2.12 Technical report. The supplier shall provide a re
35、port in accordance with the data ordering document included ir. tne contract or order (see 6.1.3) and shall include the data specified in 3.2.12.1. 3.2.12.1 D namic anal sis. When dynamic analysis is specified to be accomplished in accordance withhP?:ins Piping, valves and fittings shall conform to
36、the 3.2.15 Design pressures. 3.2.15.1 Design pressure of the boiler including the superheater but not the econo- mizer, shall be at least a gage pressure of 50 lb/in or 8 percent higher, whichever is the greater than the steady stear.:.inc dru?, pressure at the 120 percent overload condition. Furthe
37、r, the sizing and settings of the safety valves to be furnished with the boiler shall be considered to assure that the dtsrgn pressure of the boiler shall not be exceeded by more than 6 percent when the all steam stops are closed and the boiler is firing at the 120 percent firing rate with all steam
38、 discharging through the popped opened safety valves. The desuperheater shall be designed for the maximum differential pressure to which it is sub- jected, that is the differential between the maximum steam drum pressure and the minimum desuperheater outlet pressure. as determined above plus the pre
39、ssure drop between the atem drum and economizer inlet at the 120 percent overload rating. 3.2.15.3 Design pressure of the casing for strength ahall be based on the shut-off pressure of the forced draft blowers operating at their maximum speed, as specified (see 6.1.1). 2 3.2.15.2 Design pressure of
40、the economizer shall be design pressure of the boiler 3.2.16 The supplier shall closely collaborate with the shipbuilder in the design of the installation and shall furnish design information as expeditiously as possible. as may be required by the shipbuilder and automatic combustion control designe
41、r. The boiler shall be equipped with burners of the wide range type conforming to MIL-B-2128, having an operating range of not less than 10 to 1 based on oil flow. The number of burners installed per boiler shall be such that when a boiler is operating at a rate of combustion necessary for the overl
42、oad rate of the boiler, the capacity of each burner shall not exceed the capacity curve limits submitted for that burner. furnace refractory surface, and number of burners installed in the boiler in comparison with the test conditions under which the burners were tested. The boiler manufacturer shal
43、l assure that the design of burner and burner installation provides boiler performance in accordance with the requirements of this specification. The fuel oil burner shall be capable of burning efficiently the quantity of oil requir6d for boiler operation from lowest firing rate to the 120 percent o
44、verload firing rate with all burners in operation. The minimum firing rate of the burner shall be 260 pounds per hour, or as specified (see 6.1.1). Each burner shall be capable of operation between the fuel oil pressures specified (ace 6.1.1). The burners shall be designed so that the flow of fuel o
45、il will automatically shut- off when the atomizer barrel is removed from the burner. Provision shall be made against either the accidental discharge of oil or steam into the fireroom with the atomizer removed or into the furnace with the atomizer not fully secured in position. Each boiler shall be f
46、urnished with 250 percent of burner barrel assemblies for each burner of the boiler. Boilers shall be capable of being operated through a minimum range of 10 to 100 percent full steaming rate without changing the sprayer plates or the number of burners in use. Based on the use of marine diesel fuel,
47、 the full-power sprayer plates shall be sized to restrict the full-power oil flow from being exceeded by greater than 10 percent. On the same basis, the overload sprayer plates shall be sized to restrict the overload oil rate from being exceeded by greater than 5 percent. Sprayer plates capacity cur
48、ves based on a maximum fuel gage pressure of 350 lb/in2 at full-power and overload, will be provided and will reflect differ- ence in capacity with operation of-diesel fuel and JP-5 when a sprayer plate is intended for utilization with both fuels. The quantities of sprayer plates and adapters to be
49、furnished shall be as follows: 3.3 Oe- 3f insulating block, conforming to class 3 of (2) Two and one-tal! inches of high temperature insulating brick, conforming (1) One inch thick layer of insulating block, conforming to class 3 of (2) Two inches of high temperature insulating brick, conforming to MIL-B-16008. (3) Two and one-half inches of refractory firebrick, conforming to grade A of MIL-I-Ze19. to class 8 of MIL-8-16305. (b) For nontangent t.:Ccilal in form. If the latter type is used, half of the minor axis or the depth of t!C heat. mall be at least equal to one
