1、14 March 1984 SUPERSEDING MIL-V-24439 (SHIPS) 12 May 1972 (See 6.6) MILITARY SPECIFICATION VALVES, OXYGEN, HELIUM AND HELIUM OXYGEN MIXTURE, HIGH PRESSURE FOR GAS SERVICES This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all
2、 Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification describes valves for high pressure oxygen, helium, and helium oxygen mixture gas services. 1.2 Classification. The valves shall be of the following types and sizes as specified (see 6.2.1). Type A - Angle
3、body. Type B - Globe body. Type C - Check, globe body. Type D - Check, angle body. Size - 1/4 to 2-1/2 inches. 1.2.1 Pressure rating. The valves described by this specification shall be suitable-for use with an operating system pressure of 4500 pounds per square inch ( lb/in2 ) 2. APPLICABLE DOCUMEN
4、TS 2.1 Government documents. 2.1.1 Specifications and standards. Unless otherwise specified, the . following specifications and standards of the issue listed in that issue of.,the Department of Defense Index of Specifications and Standards (DoDISS) speciffed in the solicitation form a part of this s
5、pecification to the extent specified herein. Beneficial comments (recommendations , additions, deletions) and any pertinent data which may be of use in improving this document shou1d.k addressed to: Commander, Naval Sea Systems Command, SEA 5523, Department of the Navy, Washington, DC 20362 by using
6、 the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. FSC 4820 THIS DOCUMENT CONTAINS 15. PAGES. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SPECIFICATIONS MIL-V-24439
7、A 4B 777970b 0271.1907 T W FEDERAL BB-N-4 1 1 QQ-C-465 QQ-N-2 81 QQ-N-286 PPP-B-566 PPP-B-636 PPP-B-665 PPP-B-676 PPP-C-843 PPP-P-115 MILITARY MIL-S-90 1 MIL-T-1368 MIL-B-24480 MIL-L-25567 MIL-G-27 6 17 MIL-P-46036 MIL-C-5221 1 STANDARDS FEDERAL FED-STD-595 MILITARY MIL-STD-129 - Nitrogen, Technical
8、. - Copper-Aluminum Alloys (Aluminum Bronze) (Copper Alloy Numbers 606, 614, 630, 632M, and 642); Rod, Flat Products With Finished Edges (Flat Wire, Strip, and Bar), Shapes, and Forgings. Wire, Forgings and Structural and Special Shaped Sect ions. - Nickel-Copper-Alloy Bar, Plate, Rod, Sheet, Strip,
9、 - Nickel-Copper-Aluminum Alloy, Wrought. - Boxes, Folding, Paperboard. - Boxes, Shipping, Fiberboard. - Boxes, Paperboard, Metal Edged and Component s. - Boxes, Setup. - Cushioning Material, Cellulosic. - Pad, Paper, Macerated. - Shock Tests, H.1. (High-Impact); Shipb oard Machinery, Equipment and
10、Systems, Requirements for. Welded. Service . - Tube and Pipe; Nickel-Copper Alloy, Seamless and - Bronze, Nickel-Aluminum Castings, for Seawater - Leak Detection Compound, Oxygen Systems. - Grease, Aircraft and Instrument, Fuel and - Plastic Sheets, Rods, Tubes and Discs, - Components and Assemblies
11、 for Industrial Gas Oxidizer Resistant. Polychlorotrifluoroethylene. Production, Storage and Transport Equipment, Packaging of. - Colors. - Marking for Shipment and Storage. MIL-STD-167-1 - Mechanical Vibrations of Shipboard Equipment (Type I - Environment al and Type II - Internally Excited). MIL-S
12、m-271 - Nondestructive Testing Requirements for Metals. MIL-STD-278 - Fabrication Welding and Inspection; and Casting Inspection and Repair For Machinery, Piping and Pressure Vessels in Ships of the United States Navy. and Acceptance Criteria of Shipboard Equipment. MIL-Sm-740 - Airborne and Structu
13、reborne Noise Measurements Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-24439A( SH) (Copies of specifications and standards required by contractors in connection with specific acquisition functions should be obtained from the contracting act
14、ivity or as directed by the contracting officer.) 2.2 Other publications. The following documents form a part of this specificatdon to the extent specified herein. The issues of the documents which are indicated as DoD adopted shall be the issue listed in the current DoDISS and the supplement .there
15、to, if applicable. ASTM B 133 - Cspper Rod, Bar, and Shapes . (DoD adopted) G 63 - Evaluating Materials for Oxygen Service, Guide for. (Application for copies should be addressed to the ASTM, 1916 Race Street, Philadelphia, PA 19103.) SOCIETY OF AUTOMOTIVE ENGINEERS (SAE) AMs 4500 - Copper Sheet, St
16、rip, and Plate Soft Annealed (CDA 110). (Application for copies should be addressed to the Society of Automotive Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096.) (Induetry association specifications and standards are generally available for reference from libraries. They are also dist
17、ributed among technical groups and using Federal agencies.) 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specifi- cation shall take precedence. 3.1 Qualification. Valves furnished under this specification
18、 shall be products which are qualified for listing on the applicable qualified products list at the time set for opening of bids (see 4.4 and 6.3). 3.2 Materials. Materials shall be as specified in table I. When not specifically noted, commercial materials suitable for the service intended shall be
19、used. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_ MIL-V-24437A 48 W 777770b 0274707 3 W MIL-VL24439A( SH) Part Nipple Body Bonnet Union nut Dis c Synthetic insert Bellows Wetted stem assembly External seal Handwheel Other non-wetted parts TAB
20、LE I. Materials. Type A and B Nickel-copper Nickel-copper Nickel-copper Nickel-copper Bronze Nickel-copper Polychlordtri- fluoroethylene (CTFE) polymer Nickel-copper Electrodeposited Nickel-copper nickel Annealed copper Aluminum Corros ion- resisting steel (CRES) Bronze Type C and D -Nickel-copper N
21、ickel-copper Nickel-copper Nickel-copper Bronze -. Nickel-copper CTPE polymer, as approved I“ Annealed copper Applicable document , MIL-T-1368 QQ-N-281 . QQ-N-281, QQ-N-286, MIL-B-24480, QQ-C-465, alloy 632M QQ-N-281, QQ-N-286 MIL-B-24480, QQ-N-281,. QQ-N-286 MIL-P-46036. QQ-C-465, alloy 632M QQ-N-2
22、8 1 -“ QQ-N-281, QQ-N-286 AMs 4500 ASTM B 1.33, alloy 110 Conimercial Commerci.al MIL-B-24480 QQ-C-465, alloy 632M 3.2.1 Non-metallic materials. Non-metallic materials in contact with the line fluid shall have a minimum spontaneous ignition temperature of 500 degrees Fahrenheit (F) as determined by
23、the autoignition requirements of ASTM G 63. 3.2.2 Recovered materials. Unless otherwise specified herein, all equipment, material, and articles incorporated in the products covered by this specification shall be new and shall be fabricated using materials produced from recovered materials to the max
24、imum 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 become a source of raw materials,-as opposed to virgin raw materials. None of the above shall be interpreted to mea
25、n that the use of used or rebuilt products is allowed under this specification unless otherwise specifically specified. 3.3 Design and construction. 3.3.1 Valves shall be designed for a system operating pressure of 4500 lb/in2. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted w
26、ithout license from IHS-,-,-a a a t*IL-V-24439A( SH) 3.3.1.1 Type A and type B valves shall be of the packless, positive shut-off type, with the stem actuated through a bellows. Two to three complete turns of the valve handle shall be required to operate the valve from fully open to fully closed. Th
27、e handwheel shall turn in the clockwise direction to close the valve. The valve shall employ either a union bonnet or bolted bonnet con- struction. The valve shall permit full flow in either direction without any tendency for the valve to automatically close. The valve shall operate smoothly through
28、out its full range with no sudden uncontrolled changes in flow rate for flow in either direction. Valve orifice sizes shall be in accordance with table II. TABLE II. Orifice size. Valve size (inch) Minimum orifice size (inch diameter) 1/4 and 1/2 1 .o0 1/2 and 2-1/2 .50 3/4 and 1 o .20 3.3.1.2 - Typ
29、e C and type D valves shall be lift check type and shall be body guided and designed to preclude bypass of the check feature in the reverse flow direction. 3.3.2 Type A and type B valves shall have a maximum seat leakage of 4 x cubic centimeters (cm3) per second per inch orifice size when pressurize
30、d to 4500 lb/in2 below the seat and exhausting to atmospheric pressure and 75 + 5F without exceeding the maximum handwheel torques listed in table III, and shal operate properly when installed in any osition. Type C and D valves shall have a maxi- mum seat leakage of 4 x 10-3 cm3 per second per inch
31、 of orifice size when pressur- ized to 4500 lb/in2 in the reverse flow direction and exhausted to atmospheric pressure and 75 f 5F. TABLE III. Maximum torque for valve seating operation. Orifice size Maximum operating torque (inch diameter) (inch/pounds) o .20 50 50 1 .o0 225 750 3.3.3 The design of
32、 the valve actuating mechanism shall be arranged such that the valve will not be damaged when the handwheel is torqued to the value permitted in table IV. This shall be accomplished by designing the seat and the actuating mechanism with sufficient strength to accommodate the overload condition. 5 Pr
33、ovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. flIL-V-24G37A 48 I 7779706 0274711 1 I MIL-V-24439A(SH) TABLE IV. Torque values. Orifice size (inch diameter) 0.20 50 1 .o0 Torque (inch/pounds ) 240 300 1000 3.3.4 Handwheel. The handwheel shall be rou
34、nd with knurling, dimples or other irregularities on the periphery to provide a firm grip. Spoked wheels may be used on the larger sizes but the spokes shall not protrude beyond the rim of the wheel. The connection between the handwheel and the valve stem shall provide a positive drive to the stem i
35、n either direction. Connections depending solely upon friction or set screws to transmit the torque are not acceptable. 3.3.5 Cartridge. The valve shall be of the replaceable cartridge type in which the critical sealing and operating parts may be removed for examination or replacement without removi
36、ng the valve body from the piping system. No grinding, machining or welding shall be required for this operation. The replaceable cartridge assembly for each size of valve shall be usable in either type A or B valve bodies. 3.3.6 Seals. Valve seat, bonnet and any other seals used shall be arranged t
37、o prevent leakage of helium. The primary external seal shall be annealed copper in accordance with table I. Metallic seals shall seat in any direction. Syn- thetic non-metallic sealing materials shall be as specified in table I and shall be contained in such a manner that they will not extrude or co
38、ld flow and allow leakage under system pressure at any temperature between minus 65F and plus 160“T The seat design shall be such that in the event that the non-metallic seat is destroyed or carried away, there will be a secondary metal-to-metal seat. 3.3.7 Lubrication. No lubrication shall be used
39、within the normal flow path of the system fluid. Threads, thrust bearings and other moving parts located outside of the primary seals may be lubricated with grease in accordance with MIL-027617, type III. Lubricants containing petroleum base materials are not suitable for this service. 3.3.8 Shock.
40、Valves shall withstand the grade A, class I, type .B siock test requirement in accordance with MIL-S-901 (see 4.4.10). 3.3.9 Vibration. Valves shall withstand the vibration requirements specified in MIL-STD-167-1 for type I equipment (see 4.4.11). 3.3.10 Structureborne and airborne noise. Valves sha
41、ll meet the noise requirements specified in MIL-STD-740 for type 3, grade D equipment and tab1 herein (see 4.4.12). eV r. a 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-24437A 48 m 7777706 0274732 3 W TABLE V. Sound pressure acceptance lev
42、els for machinery and equipment in decibels relative to 20 micropascals. Noise grade Octave band center frequency - hertz 31.5 67 70 73 76 79 82 85 88 91 8000 4000 2000 1000 500 250 125 63 D 3.3.11 Pipe nipples or extensions. Pipe nipples or extensions of nickel- copper alloy in accordance with MIL-
43、T-1368 shall be welded to the valve body in exceed the allowable torque (see table III) at any time during the cycle. 4.4.7 Full flow. Stop valves shall be tested to assure that full flow in both directions is obtained through the valve as specified in 3.3.1. There shall be no tendency for the valve
44、 to close with the flow in either direction. Check valves shall not fail to close in the reverse flow direction. 4.4.8 Seat and bonnet tightness. The valve shall be pressurized with helium at a minimum of 4500 lb/inL alternately on each side of the seat with the valve closed with torque not to excee
45、d that listed in table III and the other port connected to a bubble-o-meter leak detector. Seat leakage shall be in accordance with 3.3.2. Helium at 4500 lb/in2 shall be applied to the valve in the open position with the other port capped. Leakage detection compound for oxygen systems in accordance
46、with MIL-L-25567, type I shall be applied to body to bonnet external leakage paths. The duration of the test shall be a minimum of 5 minutes. There shall be no evidence of external leakage during this time. 4.4.8.1 Operating torque. The seat tightness test of 4.4.8 shall be accomplished without exce
47、eding the torque values of table III. Excessive torque requirements shall be care shall be exercised to support all sides and faces of the containers internally, and voids shall not be filled with loose-fill type stuffing materials such as excelsior, newspaper and expanded polystyrene. Voids if exis
48、tent, shall be filled with material such as cellulosic wadding (PPP-C-843), paper pads (PPP-P-115) or similar media. 12 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-24439A( SH) 5.3 Marking. In addition to any special marking herein and as re
49、quired by the contract or order (see 6.2.1), interior packages (unit and intermediate) and shipping containers shall be marked in accordance with the requirements of MIL-STD-129. 5.3.1 Special marking. Each interior, (bag and box) unit and intermediate, package and shipping container shall contain a green warning label and shall match as near as possible color number 14187 of FED-STD-595. Lettering shall be black. The label shall conta
