1、 MIL-PRF-32046 1 July 2003 PERFORMANCE SPECIFICATION RATION HEATING UNIT, FIELD FEEDING This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE. 1.1 Scope. This specification covers a ration unit used for heating unitized group rations. 2. APPLIC
2、ABLE DOCUMENTS. 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made
3、to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government document. AMSC N/A FSC 7310 DISTRIBUTION STATEMENT A. Approved for public rel
4、ease; distribution is unlimited. INCH-POUND Beneficial comments (recommendations, additions, deletions) and any data which may be of use in improving this document should be addressed to: U. S. Army Soldier and Biological Chemical Command, Natick Soldier Center, Natick, MA 01760-5018 by using the St
5、andardization Document Improvement Proposal DD Form (DD 1426) appearing at the end of this document or by letter. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32046 2.2.1 Specifications and standards. The following specifications and stand
6、ards form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DoDISS) and the supplement thereto, cited in solicitation (see 6.2). STANDARDS
7、 FEDERAL UNITED STATES DEPARTMENT OF LABOR MINE SAFETY AND HEALTH ADMINISTRATION Title 30, Part 18, Section 18.64, Part 7, and Subpart K, Section 7.407- Flame Resistant Cables DEPARTMENT OF DEFENSE MIL-STD-810 Environmental Engineering Considerations and Laboratory Tests 2.2.2. Government drawings.
8、The following drawing forms part of this document to the extent specified herein: U. S. Army Soldier and Biological Chemical Command 5-13-6867Tray Ration Heater Rack Weldment 5-13-6871Ration Heating Unit, Field Feeding (Copies of drawings are available from the U. S. Army Soldier and Biological Chem
9、ical Command, Natick, MA 01760-5014) 2.3 Non-Government publications. The following documents form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed in the issue of the DoDISS cited in the solic
10、itation. Unless otherwise specified, the issues of documents not listed in the DoDISS are the issues of the documents cited in the solicitation (see 6.2). NSF INTERNATIONAL Standard No. 4 Commercial Cooking, Rethermalization and Powered Hot Food Holding and Transport Equipment Standard No. 51Plastic
11、 Materials and Components Used in Food Equipment 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32046 (Application for copies should be addressed to NSF International, P. O. Box 130140, Ann Arbor, MI 48113-0140). UNDERWRITERS LABORATORIES,
12、 INC. (UL) Standard 62 Flexible Cord and Fixture Wire Standard 296 Oil Burners (Application for copies should be addressed to Underwriters Laboratories, Inc., 333 Pfingsten Road, Northbrook, IL 60062). AMERICAN WELDING SOCIETY, INC. AWS Standard D1.6 - STRUCTURAL WELDING CODE - STAINLESS STEEL (Appl
13、ication for copies should be addressed to American Welding Society, Inc., 550 N.W. LeJeune Road, Miami, FL 33126). 2.4 Order of precedence. In event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document h
14、owever, 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 in accordance with 4.2. 3.2 Operating requirements. The ration-heating unit shall me
15、et the operating requirements specified in 3.2.1 through 3.2.12. 3.2.1 Heating rations. The ration-heating unit shall have the capacity to heat up to eighteen heat and serve rations or twelve heat and serve rations and five No. 10 food cans to a serving temperature of 160F + 10F, -0F in the boil mod
16、e in one hour or less. 3.2.2 Temperature settings. The ration-heating unit shall have two temperature settings, a boil mode that allows the unit to heat the tank of water to a boil, and an auto setting that allows the unit to heat the tank of water to 190F + 10F in one hour or less. 3.2.3 Burner sys
17、tem. The burner shall have a capacity to heat the rations specified in 3.2.1. The burner shall be securely attached to one end of the tank and shall be capable of being removed for maintenance or replacement. The burner shall meet Underwriters Laboratories (UL) Standard No. 296. 3 Provided by IHSNot
18、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32046 3.2.4 Burner fuel. The burner shall be self-priming and operate on DF1, DF2 , artic, and JP8 diesel fuels. 3.2.5 Electrical control box. The electrical control box shall be waterproof and shall contain a pu
19、ll-on/push-off illuminated switch, an auto and boil mode switch, and a power receptacle. 3.2.6 Voltage and current. The ration-heating unit shall operate on 120 VAC, 50/60Hz, with a maximum current draw of 6 amps. 3.2.7 Safety. The ration-heating unit shall be safe to operate. 3.2.8 Low water level.
20、 A sensor shall be used to ensure that the burner will not start without sufficient water in the tank, and that the heater unit shall shut down the burner if the water level in the tank is less than 4 inches from the bottom of the tank. 3.2.9 Electrical overload protection. Necessary overload protec
21、tion shall be incorporated to protect against component damage, electrical shorts, and personnel burns. The overload protection shall be readily accessible for resetting, removal, or replacement. 3.2.10 Tilt switch. The ration-heating unit shall have a switch that will shut off the burner if the uni
22、t is tilted more than 30 degrees from horizontal in any direction. 3.2.11 External temperature. The temperature on the controls, handles, latches, and top shall not exceed 120F when the unit is operating, except at the steam vent outlet. 3.2.12 Noise. The ration heating unit shall not produce noise
23、in excess of 78 dba when operating. 3.3 Support or ownership requirements. The ration-heating unit shall meet the requirements specified in 3.3.1 through 3.3.12. 3.3.1 Weight. The dry weight of the empty ration-heating unit shall not exceed 300 pounds. 3.3.2 Materials. The heating tank, tank lid, el
24、ectrical control box, and removable ration racks shall be made from corrosion resistant material. The contractor shall select all of the other materials, but the materials shall be capable of meeting all of the operational and environmental requirements specified herein. Materials used shall meet fo
25、od contact surface requirements for inside the tank and lid, NSF International Standard No. 51, See Chapter 4, section VI, TB MED 530. Other outside surfaces of the Ration Heating Unit, shall be easily cleanable. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license
26、from IHS-,-,-MIL-PRF-32046 3.3.3 Heating unit tank . The heating unit tank shall be supplied with rounded inside corners, a bottom drain valve, a standard garden hose adapter, and shall have minimum inside dimensions of 35-3/4 inches in length, 16-5/8 inches in width, 14 inches in height required to
27、 interface with the ration racks(see Drawing No. 5-13-6867). The tank shall be constructed to NSF International Standard No. 4. The tank shall not exceed the overall outside dimensions as specified in Drawing No. 5-13-6871. 3.3.4 Heater unit lid. The heater unit lid shall have a handle for opening a
28、nd closing, a locking mechanism for holding the lid open, a replaceable gasket made of FDA approved materials, and two snap action locking clamps on the front of the tank and connected to the lid to form a liquid-tight seal. The lid shall be provided with a means of venting steam and preventing pres
29、sure build-up during operation so as to allow the operator to safely open the lid without being burned by escaping steam. 3.3.5 Hour meter. The ration-heating unit shall be equipped with a non-resetting visible hour meter that accurately monitors the number of hours in tenths when the burner is oper
30、ating. 3.3.6 Electrical wiring. Electrical wiring shall conform to the requirements of UL Standard No. 62, and shall be arranged, supported, and marked to allow identification with the wiring diagram. 3.3.7 Maintainability/repairability. Routine maintenance and repairability of the heating unit shal
31、l require only standard hand tools, and have ease of accessibility. 3.3.8. Identification plate. An identification plate shall be corrosion resistant material and permanently attached to the outside of the unit. The plate shall include the manufacturers name, contract number, date of manufacture, an
32、d the Commercial and Government Entity (CAGE) number. 3.3.9 Caution label. A caution label containing the words “CAUTION- MAY BE HOT” shall be securely attached to a readily visible location on the burner end of the unit. 3.3.10 Instruction plate. An instruction plate shall be made of corrosion resi
33、stant material and permanently attached to the outside of the unit. The plate shall include complete instructions for starting and operating the ration-heating unit. 3.3.11 Menu guidelines. A menu guidelines shall be corrosion resistant material permanently attached to the outside heating unit lid.
34、It shall contain heating times for Unitized Group Rations (Heat and Serve) menu items in both the boil and the auto modes (see Drawing No. 5-13-6871). 3.3.12 Welding. All welding shall be performed in accordance with the requirements of AWS Standard No. D1.6. 5 Provided by IHSNot for ResaleNo reprod
35、uction or networking permitted without license from IHS-,-,-MIL-PRF-32046 3.4 Environmental requirements. The ration-heating unit shall meet the requirements specified in 3.4.1 through 3.4.5. 3.4.1 Operating temperatures. The ration-heating unit shall be operable and functional at ambient temperatur
36、es of 25F to + 120F. 3.4.2 Altitude. The ration-heating unit shall be operable at altitudes up to 8,000 feet above sea level with only air mixture adjustment. 3.4.3 Rain. The ration-heating unit shall be operable after being exposed to rain. 3.4.4 Corrosion. The ration-heating unit shall show no vis
37、ual corrosion, deterioration, clogging or binding of moving parts, or change in tolerance limits on any internal or external parts when exposed to a corrosive environment. 3.4.5 Vibration. The ration-heating unit shall remain operable after being subjected to vibration. 3.5 Interface and interoperab
38、ility requirements. The ration-heating unit shall meet the requirements specified in 3.5.1 through 3.5.5. 3.5.1 Vehicle and fuel supply interface. The ration heating unit shall be designed to interface with the High-Mobility, Multi-purpose Wheeled Vehicle(HMMWV). The unit shall run off a five gallon
39、 fuel can (NSN 7240-01-337-5269), and fuel feed hose adapter (NSN 7240-21-911-8834), and be secured to the cargo bed in a manner that will permit removal without tools. 3.5.2 Fuel line. A fuel line hose with drip resistant quick disconnects shall be attached from the fuel can to the burner, and be p
40、roperly vented so that the fuel pump in the burner will be properly supply fuel from the fuel can. The supply side line shall have a 100 mesh brass body in-line fuel filter containing a monel screen, minimum 10 gallons per minute capacity, that can be easily removed for cleaning. The length shall be
41、 as specified in Drawing No. 5-13-6871. 3.5.3 Skids, and skid rings. The bottom of the ration-heating unit shall have skids along both sides of the unit with curved ends, and rings at each lower corner of the skid to accommodate tie down straps for securing the unit during transit. The skids shall i
42、nterface with the grooves on the bed of the HMMWV. 3.5.4 Ration racks. The removable ration racks to be furnished with each ration-heating unit, shall be in accordance with Drawing No. 5-13-6867, and as specified in 6.2 . 3.5.5 Power cord. The unit shall be equipped with a water resistant 16 gauge,
43、3-wire, 15 foot power cord capable of supplying sufficient power to operate the unit, and shall conform to UL Standard No. 62; and flame resistance requirements of MSHA, Title 30, Part 18, Section 18.64, Part 7, and Subpart K, Section 7.407. 6 Provided by IHSNot for ResaleNo reproduction or networki
44、ng permitted without license from IHS-,-,-MIL-PRF-32046 4. VERIFICATION 4.1 Classification of inspections. The inspection requirements specified herein are as follows: a) First article inspection (see 4.2). b) Conformance inspection (see 4.3). 4.2 First article inspection. When a first article inspe
45、ction is required (see 3.1 and 6.2), it shall be inspected for the verification procedures listed in table I. 4.3 Conformance inspection. Conformance inspection shall consist of all the verification procedures listed in table I except that the requirements listed for paragraphs 4.4.2.3, 4.4.2.5, 4.4
46、.2.8, 4.4.3.1 through 4.4.3.4, 4.4.3.7, 4.4.4.1 through 4.4.4.5, 4.4.5.1 and 4.4.5.2 shall not be required. Sampling shall be as specified in the contract or purchase order (see 6.2). 4.4 Verification methods. Verification methods may include visual examination, measurement, testing, simulation, mod
47、eling, engineering evaluation, component properties analysis, certification, and similarity to previously-approved or previously-qualified designs. 4.4.1 Verification alternatives. The contractor may propose alternative test methods, techniques, or equipment including the application of statistical
48、process control, tool control, or cost-effective sampling procedures to verify performance (see 6.4). TABLE I Verification Methods _ Requirement Requirement Verification paragraph paragraph OPERATING REQUIREMENTS 3.2 4.4.2 Heating rations 3.2.1 4.4.2.1 Temperature settings 3.2.2 4.4.2.2 Burner system 3.2.3 4.4.2.3 Burner fuel 3.2.4 4.4.2.4 Electrical control box 3.2.5 4.4.2.5 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32046 TABLE
