1、MIL-T-I7600D(SHIPS) AMENDMENT 4 3 November 1982 SUPERSEDING AMENDMENT 3 1 May 1979 MILITARY SPECIFICATION TURBINES, STEAM, PROPULSION NAVAL SHIPBOARD This amendment forms a part of Military Specification MIL-T-I7600D(SHIPS), dated 18 March 1968 and is approved for use by the Naval Sea Systems Comman
2、d, Department Qf the Navy and is available for use by all Departments and Agencies of the Department of Defense. PAGE 1 2.1, under “SPECIFICATIONS, FEDERALI*: Delete reference to ffQQ-S-624“, “QQ-S-634“. and IfQQ-S-635“, and add the following: “QQ-C-390 - Copper Alloy Castings (Including Cas; Bar).
3、TT-P-28 - Paint, Aluminum, Heat Resisting (1200 F).“ PAGES 1 and 2 * 2.1, under llSPECIFICATIONS, MILITARY“: Delete reference to 11JAN-W-562“, llMIL-S-890“, “MIL-P-15137“, MIL-L-1571911, “MIL-T-22051lf, and “MIL-S-2409311, and add the following: “MIL-G-2860 - Glasses, Sight-flow, Clear, Borosilicate
4、. MIL-T-15377 - Temperature Manitsr System, Naval Shipboard. MIL-M-17060 - Motors, 60-Hertz, Alternating Current; MIL-“17413 - Motor, Direct Current, Integral Horsepower, MIL-P-18547 - Pumps, Rotary, Power Driven, Naval Shipboard MIL-V-22682 - Valves, Astqn (Far Shipboard Use). DOD-(3-24508 - Grease
5、, High Performance, Multi-Purpose Integral-Horsepower, Shipboard Use. Naval Shipboard. Main Lubricating Oil Service. . (Metric) .ff PAGE 2 2.1, under “STANDARDS, MILITARY“: Add: ItMIL-STD-1552 - Provisioning Technical Documentation, Uniform DOD Requirements for 2.1, under PUBLICATIONS“: Delete refer
6、ence to INAVSHIPS 250-644-2“ and add “NAVSHIPS 283-228-1000 - Bearing Babbitting Procedures.t1 1 of 24 FSC 2825 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-l7600D(SHIPS) AMENDMENT 4 PAGE 3 2.2, under “AMERICAN SOCIETY FOR TESTING AND MATERI
7、ALS“: Add the following: !IA 322 - Hot-Rolled Alloy Steel Bars. A 331 - Steel Bars, Alloy, Cold-Finished. A 537 - Pressure Vessel Plates, Heat-Treated, Carban-Manganese- Silicon Steel. A 565 - Martensitic Stainless Steel Bars, Forgings, and Forging Stock for High-Temperature Service, A 575 - Merchan
8、t Quality Hot-Rolled Carbon Steel Bars. A 576 - Steel Bars, Carbon, Hot-Rolled Special Quality. A 663 - Merchant Quality Hot-Rolled Carbon Steel Bars Subject to A 675 - Steel Bars and Bar Size Shapes, Carbon, Hot-Rolled, Mechanical Property Requirements. Special Quality, Subject to Mechanical Proper
9、ty Requirements .I1 2.2, under “UNITED STATES OF AMERICA STANDARDS INSTITUTE“: Delete reference te llB1, 2“. 2.2: Add: IISOCIETY OF AUTOMOTIVE ENGINEERS, INC, (SAE) AMs 5698 - Alloy Wire, Corrosion and Heat Resistant 72 .Ni - 15.5 Cr - 0.95 (Cb + Ta) - 2.5 Ti - 0.70 Al - 7.0 Fe No. 1 Temper. (Applic
10、ation for copies should be addressed to the Society of Auto- motive Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096.)“ “AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) B16.5 - Steel Pipe Flanges and Flanged Fittings. (Application for copies should be addressed to the American National Sta
11、ndards Institute, Inc., 1430 Broadway, New York, NY 10018.)“ PAGE 5 * 3.2.2.1: Add as item (aa): I1(aa) Astern valve (submarine) and control mechanism at turbine (see 3.10.3.2).11 PAGE 6 * 3.3.1: Add: “NAVSEA approval shall be obtained if the proposed design requires planned maintenance actions diff
12、erent from figure 1. In nQ case shall parts be physically interchangeable or reversible unless such parts are also interchangeable or reversible with regard to function, performance and strength .It 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-M
13、IL-T-L7600D (4) 28 m 7977706 0428b72 2 W in tension, shear, ard crush, this is represented by u, T, respectively, which are defined as: U= + F (OU - py) T= 0.6 U = 1.6 C Where: ay is the 0.2 percent offset yield, elastic limit or other normal definition of material yield strength. bu is the normal d
14、efinition,of material failure strength. F is a factor which takes into account the efficiency with which the material in the member is utilized and is dependent on the kind of loading and cross section of the member. The value of F is equal to -1 (that load required to completely yield the member di
15、vided by that required to just initiate yielding) -1. F equals zero for members in tension and where material has less than 10 percent elongation before fracture ln a tension test: F equals 0.5 for a rectangular section in pure bending. “3.13.2.3 Dynamic analysis. When specified (see 6.2.2). the man
16、ufacturer shall conduct a concurrent dynamic analysis. Items found deficient by the analysis shall be identified and corrective actisns proposed. Design changes will be incorporated at the option and expense of the Government. “3.13.2.4 Stress report. A stress summary report shall be submitted to NA
17、VSEA far information. Report shall cover all areas for which shock stresses were calculated and shall indicate the applicable yield strength for each stress reported. * 13.13.3 Exceptions. The above basis for shock design applies except in the following cases: (a) When the turbine proposed is of ide
18、ntical design to one that . has been previously shock tested and finally accepted by the Navy, such design shall be acceptable if it meets all other requirements for the prQpQSed application. (b) When the turbine proposed is of identical design to one.that has been .previously dynamically analyzed a
19、nd such analysis has been finally accepted by the Navy, such design shall be acceptable if: (1) The mathematical model applies without change: i,e., the equipment involved is a repeat procurement for which the foundation and other equipment affecting the model are the same. 10 Provided by IHSNot for
20、 ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-l7600D(SHIPS) AMENDMENT 4 (2) The turbine meets all other requirements for the (c) When the turbine proposed is similar, but not identical, to proposed application. a design previously tested or dynamically analyzed an
21、d accepted by the Navy, the turbine manufacturer may define areas of dissimilarity, including calculated llg-loadn capability in these areas, and propose ta the Navy the acceptance sf such design in lieu of the requirement in 3.13.2. If NAVSEA concurs that the similar design will provide equal or be
22、tter shock capabilities in the intended application, extension approval will be given. (dl Gland seal regulators, sentinel valves, and other valves such as a transfer valve for HP-LP turbine and submarine astern valve may, at the manufacturerls option, be separately shock tested in accordance with M
23、IL-S-901.11 PAGE 2.2 3.16: Add: “Design minimum axial and radial clearances shall be maintained by a knife edge (thin metal section) design to prevent major turbine damage if a rub occurs. No heavy diaphragm section shall be within 1/4 inch of rotating parts.! PAGE 23 3.19.2.3: Delete. 3.19.3.1: Del
24、ete and substitute: 113.19.3.1 Regular versus heavy series. Where necessary for purposes of bearing loads, pressure tight flanges, shock and other special applications, heavy series shall be used.lt PAGE 24 * 3.19.3.5: Add: !Self locking threaded fasteners shall not have been threaded on to anengagi
25、ng part more than five times. Self locking bolts are permitted where plastic insert type fasteners are appropriate: Anaerobic locking compgunds (Loctite or equal) are permitted for certain applications below 250 F when -specifically appreved by NAVSEA.“ 3.19.3.7, second and third sentences: Delete a
26、nd substitute: IlStuds shall be class 2A or 3A and shall be bottomed. Details of bottoming shall be approved by NAVSEA. For an internal socket driving provision, a square drive of 1/2, 3/4 or 1 inch shall be used dependent on stud size. One nut studs for horizontal joints shall have nut on top side
27、unless specifically approved by NAVSEA .If PAGE 25 Add as paragraph 3.20.3.1: j3.20.3.1 Leakage. The external joint of each steam containing pressure boundary shall not leak to the atmosphere. Leakage is considered cause for rejection of the unit.“ 11 Provided by IHSNot for ResaleNo reproduction or
28、networking permitted without license from IHS-,-,-MIL-T-L7600D (4) 28 9999906 0428bBL 3 m r I MIL-T-l7600D(SHIPS) AMENDMENT 4 PAGE 26 i 3.20.7: Add: “The packing housing lower half shall be either cast integrally with or welded to the lower half turbine casing.! 3.20.8, line 3: Delete “or by blank f
29、langes.“ Second sentence: Delete and substitute; !Plugs shall be seal welded after installation.“ i Add as paragraph 3.20.9.4: “3.20.9.4 Exhaust sprays, Where a flexible rubber connection is used between the turbine and condenser, exhaust sprays shall be proVi$ed with the turbine te maintain tempera
30、tures of the connection below 220 F for all modes of operation. Resistance type temperature elements shall be installed in the turbine casing in at least t.wo paints in the immediate vicinity of the rubber exhaust joint. The exhaust sprays shall be tack welded to the spray assembly pipe. Exhaust spr
31、ays shall be accessible far removal either by access through the exhaust casing openings or by removal of the exhaust spray assembly. Exhaust spray assembly shall not have unsupported cantilever sections. Drawings of the exhaust spray assemblies shall be submitted for approval; submitted data shall
32、include assembly natural frequency.! * 3.20.11, first sentence: Add: “(for submarines set is only for lifting one turbine at one time; parts shall fit both turbines).“ PAGE 27 * 3.20.13.1, item (c): Delete and substitute: !(c) Drain manifold. Stage drains (except for last stage) for saturated steam
33、applications shall be drained through passageways integral with the turbine casing. They may be drained collectively to the condenser, however, provisions shall be provided for collecting these drains with funnel drains .“ PAGE 28 3.22.2: Delete and substitute: “3.22.2 Journal bearin cceptance crite
34、ria for welds and castings shall be in accordance with the class designatibn of figure 15. Finished machined parts fabricated from wrought material shall be free of cracks and other injurious surface defects, and shall preferably be dye penetrant inspected. For magnetic particle inspection of finish
35、ed machined parts, the yoke method shall be used to prevent arc-strikes on the machined surface. For magnetic particle inspection, indications of nonmetallic inclusions, as .verified by 5X magnification inspection, are acceptable if the individual indication does not exceed 3/16 inch long and the cu
36、mulative length in any square foot of surface area does not exceed 5 inches.! 17 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-l7600D(SHIPS) AMENDMENT 4 * Add as paragraph 4.4.2.1: “4.4.2.1 Inspection of plates. For plates 1/3-inch and thicke
37、r, the plate edge prepared for welding shall be MT/PT inspected and shall not contain individual lamination or nonmetallic indications exceeding 1/2-inch long and cumulative length sf 1.5 inch in any 12 inch length.“ I 4.4.3, item (a)(4): Delete and substitute: lr(4) Front wall and first stage shell
38、 area (horizontal flagge excluded) where inlet temperature ta chest is 990 F or greater.“ * 4.4.3(b) : Delete I1Piping1l and substitute “Piping welding“, 4.4.5: Add: ftSmall sections of low pressure piping (such as gland seal vent lines, valve stem leakoffs, and lube oil connections) which are ta be
39、 welded to nipples on turbine casing do not require hydrostatic.tests. MT/PT to class 2 acceptance standards may be substituted.“ PAGE 53 4.5.4: Add: “Temperature limits of 3.8.9 and 3.8.10 da not apply ta the overspeed ConditiQn .“ 4.5.6, line 2: Delete “with approved procedures“ and substitute “wi
40、th documented procedures .It 4.5.8: Delete and substitute: 14.5.8 Steam tightness tests. 114.5.8.1 Valves and seats. The turbine manufacturer shall demon- strate by contact dye checks that valves and seats have a continuous line contact within the seating area. 114.5.8.2 Steam joints. The turbine ma
41、nufacturer shall demonstrate by contact dye checks that the casings, packing baxes and steam chest joints meet or exceed a 75 percent surface contact over the entire joint and a minimum 1/2 inch inside continuaus contact band in the joint material located between the bolts and the pressurized area o
42、f the turbine for pressures greater than 500 lb/in2 absolute, 1/4 inch for pressures between 15 and 500 lb/in-2 absolute and a continuous contact line for pressure less than 15 lb/in2 absolute,1f I 4.5.11, third sentence: Add: “Where applicable, vibration levels shall be such that testing of overspe
43、ed devices can be safely conducted without damage to the units.“ II 4.5.14: Add: IfThe manufacturer shall identify any and all blading utilized that is different (longer or shorter lengths, new root designs, new materials, new tenon designs, new shroud design, etc.) from Past Navy 18 Provided by IHS
44、Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-17600D (4) 28 7777706 0428688 6 r MIL-T-l760OD(SHIPS) AMENDMENT 4 designs. An assessment of these differences in terms of their affects on both calculated frequencies and stress levels shall be provided, with re
45、commendations on specific testing required ta confirm that calculation method utilized is correct.“ * Add-as paragraph 4.5.16: ll4.5.16 Override feature. When override feature (see 3.10.7.5) is provided, it shall be demonstrated that overtravel into the manual operating band with control oil on will
46、 not result in shutting of control valves .It * 4.6.1: Delete and substitute: l4.6.1 Lifting gear. In order to verify proper location of shipboard lifting pad eyes and minimization of interferences, shipbuilder turbine lifting and handling gear shall b.e fitted to the turbines in the first ship of a
47、 machinery class at each building yard. Unbolting the horizontal joint flange is not required for this demonstration.“ PAGE 55 5.1: Add: nTurbine exteriars shall be painted as requiredoby MIL-P-17286, except that fvr turbine parts that never exceed 250 F, such as support members, bases or bedplates,
48、 one coat of aluminum paint conforming to TT-P-28 is acceptable. Use of Egyptian Lacquer No, 56075 or equivalent in lieu of aluminum primer presently required is acceptable.n PAGE 56 6.2.2, item (d): Add as item (9): “(9) If a prefitted crossover pipe is used, state the maximum tolerance in the sett
49、ing location of the turbine crossover pipe flanges, with respect to each other, as to distance, offset and angular dimensions.“ 6.2.2, item (g): Delete and substitute: “(g) Shock requirements. (1) Whether or not shock design is required (see 3.13). (2) Shock test (see 3.13.1). a. Test agenda requirements. b. Test instrumentation requirements. c. Acceptance criteria. d. Test report requirement. (3) Whether or not concurrent dynamic analysis i
