1、MIL-G-189 16/SHIPS) 19 eptember.1955 SUPERSEDING 5474 1 August 1939 (See 60 3) MILITARY SPECIFICATION GOVERNORS, STEAM DRIVEN PUMP, PRESSURE REGULATING, NAVAL SHIPBOARD 1. SCOPE 1.1 Scope. - This specification covers the requirements applicable to the design and construction of pump pressure regulat
2、ing governors for steam driven pumps for miscellaneous services aboard Naval ships. 1.2 Classification. - Governors shall be of the following types, classes, series and sizes as specified (see 6.1): 1.2.1 Types.- Type CP - Constant pressure. Type CPAST - Constant pressure with automatic start. Type
3、CPASP - Constant pressure with automatic stop. Type DP - Differential pressure. Type DPAST - Differential pressure with automatic start. Type DPASP - Differential pressure with automatic stop. 1.2.2 Classes.- - Class 1 - Self-contained piston operated. Class 2 - Ekternal pilot actuated. Class 3 - Se
4、lf-contained direct acting diaphragm. 1.2.3 Series. - (See 6.3). Series 1500 - Steam service 1500 p. s. i. g. max. 1000“ F. max. Series 600 - Steam service 600 p. s.i.g. max. 850F. max. Series 300 - Steam service 300 p. 8. i. g. max. 750“ F. max. Licensed by Information Handling ServicesMIL-G- 18916
5、(SHIPS) 1.2.4 Sizes. - The main stean; governing valves shail De of the following nominal sizes for the services listed, as specified (see 6. 1): Nominal Boiler Aux. boiler Fuel Lube Fire Inches oil pump o il - size feed * feed 3/4 X X 1 X x- 1- 1/4 X X X 1- 1/2 X X X 2 X 2- 1/2 X 3 X 2. APPLICABLE
6、DOCUMENTS 2.1 The following specifications, standards, drawings, and publications, of the issue in effect on date of invitation for bids, form a part of this specification: SPECIFICATIONS FEDERAL NN-B- 591 - Solid Fiberboard. Crates, Sheathed, Wood, Nailed. 2 Licensed by Information Handling Service
7、sMIL-G- 1891S(SHIps) MILITARY (contd. ) JAN-P-106 - Packaging andPacking for Overseas Shipment - JAN-P-108 - Packaging and Packing for Overseas Shipment - MIL-P- 116 - Preservation, Methods of. JAN-P-117 - Packaging and Packing for Overseas Shipment - Bags, Interior Packaging. MIL-B- 121 - Barrier-M
8、aterials, Greaseproof. JAN-B-125 - Packaging and Packing for Overseas Shipment - Barrier-Materials, Waterproof, Flexible. JAN-P-127 - Packaging and Packing for Overseas Shipment - Tape, Adhesive, Pressure-Sensitive, Water- Resistant. JAN-P-132 - Packaging and Packing for Overseas Shipment - Crates;
9、Unsheathed, Wood; Nailed (for Maximum Net Load of 2,500 Pounds). Boxes, Wood Nailed. Boxes, Fiberboard (V-Board and W-Board), Exterior and Interior. MIL-B-233 - Boxes, Repair Parts. JAN-W-562 - Wire, Nickel Alloy, Spring (Heat-Resistant and MIL-S-854 - Steel, Corrosion-Resisting: Plates, Sheets, Str
10、ips, and Structural Shapes. MIL-B-857 - Bolts, Nuts, Studs, and Tap Rivets (and Material for Same). MIL-G-858 - Gray Iron Alloy: Castings (Scale-Resisting). MIL-S-870 - Steel Castings, Molybdenum Alloy. MIL-B-892 - Bronze, Phosphor, Rolled or Drawn; Bars, Plates, MIL-N- 894 - Nic kel-Copper -Alloy;
11、Wrought. MIL-S-901 - Shockproof Equipment, Class HI (High-Impact), Shipboard Application, Tests for, MIL-D-963 - Drawings, Production (for Electrical and Mechanical Equipment for Naval Shipboard Use). JAN-S-1160 - Steel, Spring, Round or Square (Including Rectangular Sections Having Thicknesses Grea
12、ter Than Half Their Width. MIL-S-1222 - Bolt - Studs, Nuts, and Bars, Round; Steel (for Service at Temperature Up to 850“ F. ). MiL-C-3769 - Crates, Intermedate, Sheathed, Wood, Nailed (for Maximum Net Loads of 3,000 Pounds). NIIL-L- 10547 - Liners, Case, Waterproof. Age Hardenable). Rods, Sheets an
13、d Strips. 3 Licensed by Information Handling ServicesflIL-G-L9Lb 48 9999706 0273528 8 m MIL-G- 18516(SHIpS) MILITARY (contd. ) MIL-I- 15024 - Identification Plates, Information Plates and Marking Information for Identification of Electrical, Electronic and Mechanical Equipment . MIL-T-15071 - Techni
14、cal Manuals for Mechanical and MIL-S-15083 - Steel; Castings. MIL-R- 15137 - Repair Parts for Electrical and Mechanical MIL-S-15464 - Steel, Alloy, Chromium-Molybdenum; Castings. MIL-S-16410 - Steel, Spring: Bars and Wire. MIL-B-16541 - Bronze, Valve: Castings. MIL-M-16576 - Metal, Gun: Castings. MI
15、L-R- 17131 - Rods, Welding, Chromium-Cobolt Composition. MIL-F-17292 - Format for List of Repair (Spare) Parts for Shipboard Mechanical and Electrical Equipment. MIL-W- 1?481 - Wire, Steel, Corrosion-Resisting. MIL-P- 17652 - .Preparation for Delivery of Electronic, Electrical and Electro-Mechanical
16、 Parts. Electrical Equipment. Equipment (Naval Shipboard Use). NAVY DEPARTMENT General Specifications for Inspection of Material and Appendix VLI - Welding. Part D, Section D-1 - Qualification of Welding Process, General. General Specification for Ships. Section S9-1 - Welding and Allied Processes.
17、STANDARDS MILITARY MIL-STD-129 - Marking for Shipment and Storage. DRAWINGS BUREAU OF SHTPS B- 104 - Fittings, Pipe, Flanged; Composition, Pressures, B-105 - Flanged Composition Pipe Fittings, 101 to 200 P. S. I. B-106 - Flanged Cast Steel Pipe Fittings. B-107 - Fittings, Pipe, Flanged, Cast Steel,
18、Pressures 100 Pounds and Below. Steam Service. 150 Pounds Maximum for Ali Services. 4 Licensed by Information Handling ServicesMIL-G-LB9Lb 46 999990b 0273529 T D MIL-G- 18916(SHIps) BUREAU OF SHIPS (contd. ) B-110 - Flanges, Steel for Steel Tubing, 150 P. S. I. Maximum B-141 - Flanges, Steel, 300 P.
19、 S. I. at 650F. (Max.). B-152 - Flanged Cast Steel Pipe Fittings. B-153 - Packings and Gaskets, Standard Application of. B-159 - Flanges, Steel, Spherical Back Van Stone 400 P. S. I. at 850 F. (Max. ). B- 175 - Flanged Cast Steel Pipe Fittings, 401 - 600 P. S. I . at 850“ F. Steam Service 551 - 750
20、P. S. I. at 425“ F. Maximum for Boiler Feed Service. B-176 - Flanges, Composition, Silver Brazing, for Copper and Copper Nickel Alloy Tubing and Bronze Pipes, Pressures 100 Pounds and Below. B-177 - Composition Flanges, Silver Brazing, for Copper and Copper Nickel Alloy Tubing 101 to 400 Pounds. B-
21、196 - Steel Flanges for Steel Tubing, Welding Neck 401 - 600 P. S. I. at 850F. Maximum Steam Service 601 - 750 P. S. I. at 425OF. Maximum Boiler Feed Service. 5000-S4823-1385621 - Flanges, Bronze, 2W P. S. I. Max., Seawater. Steam Service, 200 Pounds Maximum Hydraulic Service. PUBLICATIONS MILITARY
22、JPI-6 - Packaging and Packing of Spare Parts for Internal Combustion Engines. (Copies of specifications, standards, drawings, and publications required by contractors in connection with specific procurement functions should be obtained from the procuring agency or as directed by the contracting offi
23、cer. ) 2.2 Other publications. - The following documents form a part of this specification, CONSOLIDATED CLASSIFICATION COMMITTEE Unless otherwise indicated, the issue in effect on date of invitation for bids shall apply. Consolidated Freight Classification Rules. (Application for copies should be a
24、ddressed to the Consolidated Classification Committee, 202 Chicago Union Station, Chicago 6, U. ) 5 Licensed by Information Handling Servicesc MIL-G- 18916(S NATIONAL BUREAU OF STANDARDS Handbook H28 - Screw-Thread Standards for Federal Services. (Application for copies should be addressed to the Su
25、perintendent of Documents, AMERICAN STANDARDS ASSOCIATION Government Printing Office, Washington 25, D. C.) - B-16.6 - Steel Pipe Flanges and Flanged Fittings. - (Application for copies should be addressed to the American Society of Mechanical Engineers, 29 West 39th Street, New York, N.Y.) 3. REQmE
26、MENTS 3.1 Qmlification. - The governors furnished under this specification shall be a product which has been tested and has passed the qualification tests specified herein (see 6.2). 3.2 General requirements. - 3.2.1 The principle of reliability is paramount and no compromise of this principle shall
27、 be made with any other basic requirements of design. It is the intention of this specification to obtain governors of such design that they will operate over a long period of years with a minimum of servicing. Where wear or erosion is unavoidable the parts subjected to such wear or erosion shall be
28、 of the best materials available for the purpose in order to reduce these detrimental effects to a minimum. The design and construction of aU governors shall be the most compact consistent with the following requirements: (a) Reliability. (b) Accessibility for repair. (c) Resistance to wear or corro
29、sion. (d) Economy. e) Satisfactory operation when inclined as follows: (1) Up to 15 degrees to either side (permanently inclined). (2) With the ship rolling up to 45 degrees from the vertical (3) With the ship pitching 10 degrees up and down from the to either side. . normal horizontal plane. 3.2.2
30、The governors shall withstand the high-impact shock test specified in 3.2.3 Each governor body and device shali be designed to suit the highest working Specification MIL-S-901. pressure on which it is to be used, and shall be sufficiently rugged to wlhstand any stresses which may be transmitted via
31、the piping installations arising from vibration, expansion and contraction. 6 * c Licensed by Information Handling ServicesMIL-G-L87Lb Li! qssOUb 0273533 8 MIL-G- 16916(SHPS) 3.2.4 All types and classes of governsrs shall be suitable for use with recipro- catinj, centrifugal or rotary pumps. Governo
32、r for use with reciprocating pumps, or other rypes of pumps having a pulsating discharge, shall be designed so that the steam valie will not tend to shut off steam at each discharge stroke of the pump. 3.2. 5 The construction of all governor valves and devices shall be such as to permit easy access
33、to all parts for overhaul and repair. All wearing parts shall be removable without removing the governor valve from the steam line. 3.2.6 Each governor shall be completely suitable for the particular .pump discharge pressure and range of adjustment as specified (see 6.1). Table I indicates typical r
34、equirements and is intended for guidance only. Table I - Classification. : Steam : : governor : valve , series : : Rated pump : : pressure : : Duty : discharge : Range of adjustment : Y. s. 1. g . : lJ. s. 1. . . 1500 : BF : 1800 1300 to 1800 FO : 1150 350 to 1150 50 to 150 600 to 1300 150 to 350 35
35、0 to 1150 5 to 40 50 to 175 375 to 475 150 to 350 5 to 40 EO to 175 : FS : 150 : BF : 7 50 3 50 : 600 : *O i 1150 : LO : 100 : FS : 17 5 : BF : 4 50 : FO : 3 50 : 300 :Lo: ao0 : FS : 17 5 . for this duty. typical for this duty. typical for this duty. this duty. (b) FO duty means - boiler fuel oil pu
36、mp service is (c) Lo duty means - lubricating oil pump service is (d) FS duty means - fire pump service is typical for 7 Licensed by Information Handling ServicesMIL-G-L89l,b r8 m 999990b 0273532 T W 3.2.7 Steam governing valves. - 3.2.7.1 Each governor design shall be such as to require a minimum p
37、ressure drop through the steam valve under operating conditions. This pressure drop shall not exceed 5 percent of the inlet pressure when the governor steam valve is passing its design rafed flow; except that on steam systems at 600 p. s. i. or lower the pressure drop may be as high as 30 p. s. i. g
38、. (see 6. 1. (e). operated feature by which the automatic governing action may be rendered inoperative and allbw full flow of steam through the valve. This feature shall consist of a handwheel and stem acting directly on the main steam valve. A suitable indicating device marked #Auto and 8cOpen” sha
39、U be fitted. 1 3.2.7.2 Each steam governing valve shall be fitted with a simple-, manually MIL-G- 18916(SHIPS) 3.2.7.3 When the actuating medium is any fluid other than air or fresh water the t7alves shall be so designed that rupture of any diaphragm, or leakage through any joint cannot result in co
40、ntamination of the steam driving the pump unit. 3.2.7.4 No packing glands, stuffing boxes, metal bellows or syphons shall be used 3.2.7.5 All governors shall have straight - through steam valves unless otherwise 3.2.7.6 The steam vaves of ail classes shall have flanged connectiok throughout, on any
41、automatically moving parts. specifically approved by the bureau or agency concerned. including spring chambers, unless otherwise specified in the contract or order. Inlet an outlet flanges shall form part of the valve body, AU fianges shall be drilled by the manufacturer to Navy standards uness othe
42、rwise specified in the contract or order. 8 Licensed by Information Handling ServicesMIL-G-Z91b 48 D 999990b 0273533 Z MIL-G- 18916(SHIPS) :. t. 7. 6. 1 Inlet and outlet flange shapes and bolting shall be in accordance with Table II - Line flange shape and bolting. dr ,600 : B- 175 : 300 Steel : B-
43、106 : 300 Steel : B- 106 :300 Bronze : B- 105 . I Table III - Actuating connection flange shape and bolting. Applicable drawings Licensed by Information Handling ServicesMIL-G-LBLb Q0 m 997790b 027353V 3 W MIL-G- 18916(SHIps) 3.2.7.6. 2 All gasket mating surfacos of flanges shal; be finisned wit!i a
44、 serrated or phonographic finish with 60 to 80 cuts per inch of face width, 0:OOZ to O. 003 inch deep cut. 3.3 Description of types. - 3.3.1 Type CP - constant pressure. - This governor shall be designed to maintain a constant predetermined pressure at a selected point iri the pump d-charge line by
45、control of the steam supply to the pump driver, regardless of variation in steam pressure and pump load. 3.3.2 Type DP - differenthi pressure. - This governor shail be designed to main- tain a constant predetermined diff erence in pressure between two selected points in the pump discharge line (for
46、example: across a boiler feedwater regulator) by control of the steam supply to the pump driver, regardless of variation in steam pressure and pump load. The differential pressure shall be adjustable from 50 pounds per square inch (p. s. i. ) to 100 p. s. i. 3.3.3 Type CPAST and type. DPAST governor
47、s are the basic types CP and DP with additional automatic start features. These governors shall be designed and arranged to positively and automatically start a pump when the pressure in the actuating line falls below a certain low predetermined pressure, after which the basic governor takes over an
48、d maintains the pump pressure for which it iis set as specified in 3.3.1 and 3.3.2. 3.3.3.1 After automatic starting the governor shall operate as a basic CP or DP governor until manually reset for automatic starting. The starting feature shall be adjustable as to starting pressure. additional autom
49、atic stopping features. These governors shall be designed and arranged to positively and automatically stop a pump when the pressure in the actuating line to the stopping device fails below a certain low predetermined pressure, and shall not automatically restart the pump even though the actuating line pressure is reestablished. 3-3.4 Type CPASP an type DPASP governors are the basic types CP and DP with 3.3.4.1 The automatic stopping feature shal be arranged so that it can be made inoperative by manual means, in which case the governor shall operate as a basic
