1、MIL-F-2427LC bb 777770b 0426077 O M 1 INCH-POUND 1 30 March 1990 MIL-F-2429 1 C( SH) SUPERSEDING 10 August 1971 MIL-F-24291 B(SH1PS) MILITARY SPECIFICATION FLOWMETER, FLUID ELECTROMAGNETIC TYPE This specification is approved for use by the Naval Sea Systems Command, Deportment of the Navy, and is av
2、nlable for cise by all departments and agencies of the Department of Defense. 1. SCOPE 1,l Scope. This speciEication applies to electromagnetic type fluid flowmeters for use in fresh water, seawater, or any fluid of conductivity at least 0.01 siemens per meter. These flowmeters are not to be used in
3、 new construction. Only one classification o flowmeters is covered by this specification. 2. AIVLICAIILE DOCUMENLS 2. i Government Docii men ts. 2.1.1 Specifications, standards, and handbooks, The following specifications, standards, and handbooks, form a part this document to the extent specified h
4、erein. Unless otherwise specified, the issues o these documents are those listed in the. issue of the Department of Defense Index o Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). eneficial coniments (recommendations, additions, deletions) and any p
5、ertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 5523, Depart- ment of the Navy, Washington, DC 20362-5101, by using the self-addressed Standardization Document Improve- ment Proposal (DD Forni 1426) appearing at the end o
6、f this document or by letter. AMSC NIA FSC 6680 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Licensed by Information Handling ServicesSPECIFICATIONS FEDERAL PPP-F-320 MILITARY MILS-901 MIL-E-2036 MIGP-15024 MIL-P- 15024/5 MILE-16400 MILT-16420 MIGL-19140 MIL-R-28
7、803 STANDARDS MILITARY MIGSTD-22 MILSTD-108 MIL-STD-167-1 MIGSTD-278 MIL-STD-454 Fiberboard: Corrugated and Solid, Sheet Stock (Container Grade) and Cut Shapes Shock Tests, HI (High-Impact); Shipboard Machinery, Equipment and Systems, Requirements for Enclosures for Electric and Electronic Equipment
8、 Plates, Tags and Bands for Identification of Equipment Plates, Identification Electronic, Interior Communication and Navigation Equipment, Naval Ship and Shore: General Specification for Tube, Copper-Nickel Alloy, Seamless and Welded (Copper Alloy Numbers 715 and 706) Lumber and Plywood, Fire-Retar
9、dant Treated Readouts, Segmented, General Specification for Welded Joint Design Definitions of and Basic Requirements for Enclosures for Electric and Electronic Equipment Mechanical Vibrations of Shipboard Equipment (Type I Environ- mental and Type II - Internally Excited) Welding and Casting Standa
10、rd Standard General Requirements for Electronic Equipment 2 Licensed by Information Handling ServicesHIL-F-2427LC bb 7777706 042b077 Y MIL-STD-461 MIL-STD-462 MIL-STD-470 MIL-STD-471 MIL-STD-78 1 MICSTD-785 MIL-STD-810 MIGSTD-1388-1A MIL-STD-1399 Section 300A HANDBOOK MILITARY MICHDBK-217 Electromag
11、netic Emission and Susceptibility Requirements for the Control of Electromagnetic Interference Electromagnetic Interference Characteristics, Measurement of Maintainability Program for Systems and Equipment Maintainability VerificationLemonstrationEvaluation Reliability Testing for Engineering Develo
12、pment, Qualification, and Production Reliability Program for Systems and Equipment Development and Production Environmental Test Methods and Engineering Guidelines Logistic Support Analysis Interface Standard for Shipboard Systems Electric Power, Alternating Current (Metric) Reliability Prediction o
13、f Electronic Equipment (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Naval Publications and Forms Center, (Am NPODS), 5801 Tabor Avenue, Philadelphia, PA 19120-5099.) 2.1.2 Other Government documents, drawings, and publica
14、tions. The foliowing other Government documents and drawings form a part of this specification to the extent specified herein. Unless othenvise specified, the issues shall be those in effect on the date of the solicitation. DRAWINGS NAVAL, SEA SYSTEMS COMMAND (NAVSEA) NAVSHIPS NO. 810-1385861 Flange
15、s, Sea Water 700 PSI Max 3 Licensed by Information Handling ServicesMIL-F-2427LC bb 777790b O42b080 O (Application for copies should be addressed to Commander, Portsmouth Naval Shipyard, Code 202.2, Portsmouth, NH 03801.) PUBLICATIONS NAVSEA 0981-LP-052-8090 Cable Comparison Guide Pertaining to Elec
16、tric Shipboard Cable (Application for copies should be addressed to the Naval Publications and Forms Center, (Attn: MODS), 5801 Tabor Avenue, Philadelphia PA 19120-5099.) 2,2 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text o
17、f this document shall take precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3, REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection (see 6.5) in accord
18、ance with 4.4. 3.2 Description, The electromagnetic (EM) flowmeter system (see 6.3) shall sense, measure, and display rate of flow, total flow, and direction of the flow through the flow sensor. An EM flowmeter system shall consist of the following components: a. Flow sensor; Produces an electrical
19、output that represents average flow rate of the liquid (see 3.4) b. Indicator trammitter: The signal conditioner portion of the flowmeter system (see 3.5) c. Totalizer indicator: Provides displays for TOTAL FLOW and FLOW RATE and the operating controls for the systems (see 3.6.3 and 3.6.6.4). When s
20、pecified (see 6.2) the totalizer indicator shall be combined with the indicator transmitter unit. 3.2,l Pipe size. The flowmeters covered by this specification shall function as specified with nominal pipe sizes (nps) ranging from one inch nps to four inch nps (see 3.4.2 and 6.2). 33 General require
21、ments. 33.1 Parts, materiais, and processes. The selection, usage, and methods of implementation of parts, materials, and processes shall conform to MIL-E-16400. 4 Licensed by Information Handling ServicesMIL-F-2427LC 66 = 7777706 04260L 2 33.2 Nonmetallic material, Nonmetals, when used foi seals, p
22、rotective finishes, and so forth, shall be moisture and flame resistant, shall not support fungus growth, and shall not be adversely affected by the ambient environments specified. 33.3 Accessibility. All parts and subassemblies which may require servicing, repair, or replacement during the life of
23、the flowmeter equipment shall be readily accessible for repair or replacement. 33.4 Recovered materials. Unless otherwise specified herein, all equipment, material, and articles incorporated in the products covered by this specification shall be new and may be fabricated using materials produced fro
24、m recovered materials to the maximum 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 a
25、bove shall be interpreted to mean that the use of used or rebuilt products is allowed under this specification unless otherwise specifically specified. 3.3.5 Interchangeability of removable or separable components. Parts, subassemblies, and major assemblies of the flowmeter that are removable or sep
26、arable from the equipment shall be physically and electrically interchangeable with corresponding items from stock or production. Following any such part replacement, the flowmeter equipment shall meet the requirements of this specification upon the accomplishment of the adjustments and calibration
27、procedures that are supplied with the equipment. 3.3.5.1 Interchangeability. 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. 33.6 Safety. Safety of flowmeter equipment shal
28、l be in accordance with requirement 1 of MIL-STD-454. 33.7 Painting and color. The flowmeter equipment and associated subunits shall be painted in accordance with MILE-16400 except for any surfaces or other parts where painting would impair meeting the requirements of this specification. Color shall
29、 be in accordance with MIL-E- 16400. 3.3.8 Duty cycle. The flowmeter equipment shall be constructed for continuous operation. 33.9 Power input. The flowmeter equipment shall operate with type I, 115 volts, 60 hertz (Hz) electrical ungrounded power in accordance with MIL-STD-1399, section 300. The fl
30、owmeter shall operate and meet all the requirements and constraints of MICSTD-1399, section 300. The equipment shall not be damaged nor require recalibration when power is interrupted and restored. 5 Licensed by Information Handling ServicesMIL-F-2.427LC bb W 777770b 042b082 4 W MIGF-24291 C(SH) 33.
31、10 Electrostatic discharge caution. When devices, such as complementary metal oxide semiconductors, that are sensitive to electrostatic discharge are used, a note on the printed circuit board or subassembly shall indicate to handle with special care due to the possibility of electrostatic discharge
32、damage. 33,ll Electronic circuitry. Electronic components shall not depend on potting or dipping to provide a supporting matrix for the components. If plug-in boards are used, extender boards shall be provided and stowed in the equipment so that the plug-in boards can be made accessible for maintena
33、nce or troubleshooting. 33J2 Low flow rate exclusion. How rates less than the flow rate exclusion point shall be excluded from totalization. The low flow rate exclusion point shall be between 0.5 and 1.0 percent of the full scale flow rate. 33,13 Dry sensor indicator. A means shall be provided to de
34、tect when the sensor is not filled with water. An indication of this condition shall be provided on the front panel of the totalizer indicator unit (see 3.6.6.6). 33.14 Electrode cleaning capability. An electrode cleaning capability shall be incorporated into the flowmeter for cleaning the electrode
35、s without removal of the sensors from the piping systems, After the cleaning test specified in 4.8.18, the flowmeter shall met the accuracy requirement of 3.10.1. 33.15 Reverse flow indicator, A single indicator (lamp) or light emitting diode. (LED) shall be provided on the front panel of the indica
36、tor transmitter and totalizer indicator units to indicate direction of flow, The indicator shall be normally extinguished and shall light when reverse flow- is detected. 3316 Liquid, The liquid whose flow is to be measured shall be as specified (see 6.2). 33.16.1 Liquid temperature range. The flowme
37、ter shall meet the requirements of this specification for liquid temperatures of 28 to 140 degrees Fahrenheit (“v. 33.17 Digital displays. conforming to MIL-R-28803. Digital displays shall. consist of light emitting diodes (LEDs) 33,18 Display readout units, The desired units for all readouts (pound
38、s, gallons, cubic feet) shall be as specified (see 6.2). All readouts shall display in the same unit. 3.4 Flow sensor, The flow sensor unit shall consist of metal tubing (pipe spool) with flanged ends (see 3.4.1). A watertight and nonconductive housing shall enclose the excitation coils, sensor elec
39、trodes, and associated wiring. Unless otherwise specified (see 6.2) a single electrical interface cable, 25 feet in length shall be provided with the sensor. The cable shall enter the sensor through 6 Licensed by Information Handling ServicesMIL-F-2429 lC(SH) a watertight connection positioned on th
40、e flow exit end of the sensor, above the sensor pipe spool. The direction of flow through the sensor shall be clearly and permanently indicated by an arrow on the outside of the sensor with the word “FLOW“ printed close to the arrow. 3.4.1 Sensor pipe spool. The metal structural part (exclusive of t
41、he liner) of thesensor pipe spool shall be made of material specified in 3.4.1.1 or 3.4.1.2 as applicable. The minimum wall thickness of the pipe spool, exclusive of the liner, shall be as specified in table I. Flanges shall be welded to the tubing as specified in 3.4.1.3.1. The pipe spool shall hav
42、e an electrically insulating liner as specified in 3.4.1.4 securely bonded along the entire length. The inside diameter of the liner shall be as specified in table I. TABLE I. Sensor Pipe spool characterstics. Flange size Liner id Minimum wall thickness rips plus or minus 0.005 metal pipe spool (inc
43、hes) (inches) (inches) 1 1-1/4 i-ln 2 2-if2 3 3-112 I4 1.125 1.470 1.682 2.135 2.607 3.170 3.640 4.094 0.095 o. 120 0.120 0.134 0.165 0.180 0.203 0.203 3.4.1.1 Material (submarine applications). For each lot of material offered for submarine applications the metallic structural part of the sensor pi
44、pe spool shall be level 1 Certified Material (see 6.3). 3.4.1.2 Material (surace ship applications). The metallic structural part of the sensor pipe spool shall consist of one integral length of 70-30 copper-nickel tubing conforming to type I, class 700, grade II of MIL-T-16420. 3.4.13 Pipe spool fl
45、anges. Spool flanges shall be forged 70-30 copper-nickel flat face type in accordance with Drawing 810-1385861. 3.4.1.3.1 Welding. The flow sensor tube to flange welding joint shall conform to P10 of MIL- STD-22 and shall be fabricated and welded in accordance with MIL-STD-278. 3.4.1.4 Spool Liner.
46、The spool liner shall provide electrical isolation of the liquid being monitored from the metallic spool. 7 Licensed by Information Handling ServicesMIGF-24291 C(SH) 3,4,1,5 Sensor electrodes. Sensor electrodes shall not protrude more than 1/8 inch beyond the internal diameter of the liner. 3,4,1,5,
47、1 Material, Sensor electrodes shall be fabricated from 70-30 copper-nickel alloy. 3,4,1,6 Flow range. The sensor flow range shall be equivalent to a velocity range of 1 to 15 feet per second through the liner (see table I for liner internal diameter (id). . 3,4,2 Size of flow sensor unit. The size o
48、f the flow sensor shall be as shown in table I. The sensor spool length (face to face distance between the sensor spool flanges) shall be 22 inches unless otherwise specified (see 6.2). The maximum outside width of the housing shall be 16 inches. 3.43 Sensor electrical housing. The sensor enclosure
49、shall enable the flowmeter to meet the watertight requirements as specified in MIL-STD-108. When specified (see 6.2), the sensor electrical housing and fittings shall be explosion proof and submersible up to 50 pounds per square inch (lb/in2) in accordance with MIL-E-2036. 3.4,4 Sensor electrical requirements. The power requirements shall not exceed 200 watts and the input volt-amperes shall not exceed 600. The sensor signal shall transmit a distance of at least 300 feet. Cable type shall be selected from NAVSEA 0981-LP-052-8090. A junction box may be used to facilitate connecti
