NAVY MIL-T-24398 (2)-1983 TURBINE STEAM AND REDUCTION GEAR AUXILIARY GENERATOR-DRIVE (NAVAL SHIPBOARD USE)《发电机驱动辅助蒸汽和减速装置的汽轮机(海军舰载使用)》.pdf

1、MIL-T-2LI378 (2) 28 m 7777706 OL127376 3 m r - .-2 Bars, Rods and Forgings. “DOD-G-24508 - Grease, High Performance, Multi-Purpose (Metric) .“ PAGE 3 2.1, under “STANDARDS, MILITARY“ : Add: “MIL-STD-1552 - Provisioning Technical Documentation, Uniform DOD “MIL-STD-1561 - Provisioning Procedures, Uni

2、form DOD,“ Requirements for. PAGE 4 2.2, under “AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)“: Add: “B16.5 - Steel Pipe Flanges and Flanged Fittings.“ FSC 2825 1 of 6 GLOBAL ENGINEERING DOCUMENTS 2625 So.Hickory St. Santa Ana. CA 92707 Obtained From 1714)540-9870: 12133624-1216: !6001854-3179 Provid

3、ed by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-24378 (2) 28 m 7777906 0427377 5 m MIL-T-24398(SHIPS) AMENDMENT 2 PAGE 11 Table I, Section “(u) Valves control, (1) Disc (poppets and seats)“: Add the following: II I Applicable properties documents Mat

4、erial and MIL-N-6710 Ni-Cr-Fe alloy Temperature limit (F) (maximum) (see 3.2.2) Remarks 1050 See 3.4.52.11 (Seats only) Il PAGE 14 3.2.7, item (c): Add “Valve seat seal weld area shall be weld inlaid with nickel-chromium-iron alloy (73-15-7) of sufficient thickness to prevent the occurrence of a hea

5、t affected zone in the 12 chrome base material when making the valve seat to casing weld.“ 3.2.7, irem (h): Add “or entire seat shall be constructed from nickel- chromium-iron alloy in accordance with MIL-N-6710“. 3.2.7: Add as item (i): “(i) Lead or lead containing lubricants shall not be used on a

6、ssembly or parts in steam path.“ PAGE 24 3.4.32.4: Delete and substitute: “3.4.32.4 Other component piping and connections. Other component piping r and connections may be welded, if take-down joint is not required for maintenance and overhaul. Where take-down joint is required, it shall be flanged

7、using male-female flanges or it shall have a straight thread adapter with O-rings and O-ring face seal type unions (CPV Mark VI11 or equal). The,wall thickness of tubing used shall be not less than 0.065 inch in sizes above 112 inch. Where flanges are used in oil piping, male-female flanges conformi

8、ng to ANSI B16.5 shall be used. Tapered pipe threads shall not be used. Steel socket welding fittings in accorance with ANSI B16.11, schedule 40, may be used for 50 lb/in2 self-contained lube oil systems. Face-feed silver-braze fittings in sizes 1/2 inch and above shall not be used. Only preinserted

9、 ring fittings shall be used in sizes 112 inch and above. Face-feed fittings may be used in sizes below 1/2 inch. Brazing shall be accomplished in accordance with NAVSEA 0900-LP-001- 7000. Mechanical flareless (bite-type) fittings shall not be used. The gas- ket seating surfaces or flanged joints sh

10、all meet the requirements of MIL-STD- 438 or MIL-STD-777, as applicable.“ 3.4.34: Add: “Only unclassified information is to be contained on identification plates .“ 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-24398(SHIPS) AMENDMENT 2 PAGE

11、 39 * 3.4.51.9.6: Delete and substitute: “3.4.51.9.6 Purification. Two flanged connections shall be provided. The piping shall permit purification of the lube oil with the turbine opera- ting. One connection shall permit complete draining of the sump and shall also serve as the suction to the ships

12、purification system. A vacuum breaker shall be provided to preclude, during oil purification, lowering thesump operating oil level below the minimum safe level for operation of the equipment serviced from the sump. The vacuum breaker shall be positioned such that the sump tank low oil level alarm sh

13、all be activated before suction is broken with the ship at an even keel. Features shall be included in the design of the vacuum breaker to prevent clogging of the vacuum breaker. Manipulation of a locked valve in the piping shall be required to defeat the vacuum breaker and permit pumping down the s

14、ump tank. The other connection shall be for return of purified oil by a separate line .I PAGE 41 * 3.4.51.20, item (b): Add “The alarm shall occur before the sump suction break is uncovered and shall be set as close to the normal operating level as practical without resulting in spurious alarms duri

15、ng design list and trim angles. I * 3.4.51.21: Delete and substitute: “3.4.51.21 Sight flows. Sight flows shall not be located on pressurized oil supply piping. Each journal bearing cap and each thrust bearing cover or housing shall be fitted with a sight flow integral therewith or bolted thereto. S

16、ight-flows shall provide visual indication of oil discharge from bearing pressure pad or loaded area of the bearing during operation. Bolted-on fittings shall be bronze or brass and windows shall be shock-resistant glass in accord- ance with MIL-G-2860 (1/4 inch minimum thickness).“ PAGE 42 * 3 -4.5

17、1.26, line 2: Delete “MIL-L-15719“ and substitut “DOD-G-24508“. PAGE 43 * 3.4.52.11, last sentence: Delete and substitute: “For saturated steam applications, expansion lips or rings used for absorbing expansion between seat and body shall be constructed of nickel-chromium-iron alloy (73-15-7 nominal

18、) or entire-seat shall be constructed from nickel-chromium-iron alloy in accordance with MIL-N-6710.“ PAGE 49 * 3.6.2: Add “In no case shall parts be physically interchangeable or reversible unless such parts are also interchangeable or reversible with regard to function, performance and strength.“

19、3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-T-24398( SHIPS) AMENDMENT 2 PAGE 59 3.12: Delete and substitute: “3.12 Equipment variations. Equipment which does not conform to contrac- tual requirements shall be handled in accordance with the

20、provisions of the contract. Other variations, which result in conforming equipment but con- stitute deviations from the approved configuration, materials, or processes, shall be handled in accordance with the procedures set forth hereinafter. Specific examples of these are as follows: (a) Manufactur

21、ing errors which necessitate special repair procedures (b) An improperly-applied process procedure or a substitute process or the use of non-standard repair partsI which does not adversely affect the end use of the part or assembly involved. “3.12.1 Disposition. Variations which affect installation,

22、 operation, performance, maintainability, repair parts (onboard and shore based), or inter- changeability of parts that would be repaired or replaced during maintenance of the equipment require Government approval. “3.12.2 Conditions for acceptance of parts having variations. Variations will be cons

23、idered for approval under the following conditions: (a) The effect of the variation, either as-is or with the part (b) The nature of the part involved is such that replacement is not (c) Where parts involved are normally on board repair parts, three of , modified, is technically acceptable to the Go

24、vernment. economically justified. each such non-standard parts or sets of parts shall be furnished at contractors expense, consisting of one of each as on board repair parts and two of each as stock repair parts. (d) Where parts involved are normally stock repair parts but not on board repair parts,

25、 two of each such special parts or sets of parts shall be furnished at contractors expense as stock repair parts. (e) The repair parts furnished in accordance with (c) and (d) shall consist of the lowest echelon of the parts required to compen- sate for the variation. For example, the major parts in

26、 which the basic error is made, need not necessarily be furnished; if a rotor bearing journal is machined undersize necessitating the installation of a non-standard bearing, spare non-standard bearings shall be furnished, but a spare non-standard rotor need not be furnished. parts shall be submitted

27、 in accordance with MIL-STD-1552 and MIL-STD-1561. The component involved shall be identified by ship, unit, component serial number, and shown at “NO CHARGE“ in the documentation. (8) An equipment variation summary drawing, together with certification that resultant special parts have been furnishe

28、d, shall be sub- mitted for all variations permitted herein under each contract. (f) Separate provisioning documentation for non-standard repair 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-24398( SHIPS) AMENDMENT 2 (h) Where the variation

29、 results in additional cost to the Government to accommodate a non-standard Government furnished materj-al (GFM) item, such as additional shipyard costs for installation, the contractor shall reimburse the Government for the total amount of such costs involved. affects interchangeability. (i) The re

30、quirements of (c) and (d) apply only where the variation “3.12.3 Procedure for approval of variations. The following shall be used for approval of variations: (a) Variations shall be referred to NAVSEA for approval via the local Government inspector within thirty days after occurrence. Submittals sh

31、all be in the same manner as established for obtaining drawing approval which on shipbuilder furnished equipment, will require submittal via the shipbuilder and cognizant supervisor. While on Government furnished equipment (GFE), submittals shall be made via local inspector directly to NAVSEA. Any w

32、ork done on equipment with variations prior to obtaining Government approval shall be at the contractors risk. letter report containing: (b) Each variation referred to NAVSEA shall be accompanied by a (1) The contract number and item involved. (2) The date on which the variation was discovered. (3)

33、The circumstances or conditions under which the variation (4) A complete description (including sketch or drawing to (5) The corrective measures proposed. occurred. scale) of the nature and extent of the variation. a. For the part or parts containing variations. b. To prevent the recurrence of simil

34、ar variations, (6) The effect of the variation (as corrected) on performance, endurance, stress levels, and parameters cited in 3.12.1, including: a. Detailed engineering basis for acceptance. b. Certification of the part or parts as corrected. (7) Identification of the benefit to the Government, if

35、 (c) Copies of all correspondence involving repair parts shall be variation is accepted as modified. forwarded to Ships Parts Control Center, Ships Division, Program Managers Branch, Mechanicsburg, PA 17055.“ 3.13 and 3.14: Delete. PAGE 60 Add as paragraph 3.16: “3.16 Workmanship and quality control

36、 records. Machinery errors and equipment variations which do not require Government approval (see 3.12.1) (such as non-significant and non-criiical deviations from drawing dimensions or tolerances for castings, forgings, weldments, connections, or machine- processed parts) shall be documented, and a

37、 copy shall be furnished to the 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-24398(SHIPS) AMENDMENT 2 local Government inspector. If the inspector considers that an unclassified deviation does involve contractual requirements, then such de

38、viation shall be classified and treated in accordance with 3.12 through 3.12.3. When a repair restores a part to original drawing dimensions, but involves no change of materials and uses a previously-approved repair process, the local Government inspector shall approve such repair. There shall be pe

39、riodic reviews between the manufacturer and the inspection activity on the accumulated incidents of machining errors for determination of corrective measures to improve workman- ship. The frequency and timing of such reviews shall be as determined by the inspec tor. “ LAST PAGE * DD Form 1426, Speci

40、fication Analysis Sheet: Delete address and substitute: “COMMANDER NAVAL SEA SYSTEMS COMMAND (SEA 5523) DOD STANDARDIZATION PROGRAM AND DOCUMENTS DIVISION DEPARTMENT OF THE NAVY WASHINGTON, DC 20362“ NOTE: The margins of this amendment are marked with an asterisk to indicate where changes (additions

41、, modifications, corrections, deletions) from the previous amendment were made. This was done as a convenience only and the Government assumes no liablity whatsoever for any inaccuracies in these nota- tions. Bidders and contractors are cautioned to evaluate the requirements of this document based o

42、n the entire content irrespective of the marginal notations and relationship to the last previous amendment. Preparing activity: Navy - SH (Project 2825-N019) 6 * U.S. GOVERNMENT PRINTING OFFICE: 1983-605-034/1562 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-