1、MIL-T-Yb7bB 27 777770b 0457735 2 W I INCH-POUND I I I MIL-T-46786B 26 October 1990 SUPERSEDING MIL-T-46786A 6 August 1971 MILITARY s PEC I FI CATION TANKS, FUEL, ENGINE: GENERAL REQUIREMENTS FOR This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. S
2、COPE % - 1.1 ScoDe. This specification covers five types with four classes of “5 engine fuel tanks from 1- through 400-gallon capacity for gasoline, diesel, . and multifuel (see 6.4). 1.2 Classification. Fuel tanks shall be of the following types and 1.2.1 Types. classes as specified (see 6.2). The
3、types of fuel tanks shall be of the following: a. Type I - Terneplate. b. Type II - Steel. c. Type III - Aluminum. d. Type IV - Plastic. e. Type VI - Nonmetallic, nonself-sealing. 1.2.2 Classes. The classes of fuel tanks shall be of the following: a. Class 1 Industrial - Fuel tanks constructed and i
4、ntended primarily for use on portable and stationary industrial equipment. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: USA Belvoir Research, Development, and Engineering Center, ATTN: STRBE-
5、TSE, Fort Belvoir, VA 22060-5606 by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 2910 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Licensed by Information Handling Services
6、_I_- MIL-T-Llb7bB 29 = 999990b 0457736 4 = MIL-T-46786B b, Class 2 Construction - Fuel tanks constructed and intended primarily for use on earthmoving, construction, and rough terrain material handling equipment. c. Class 3 Automotive - Fuel tar;ks constructed and intended primarily for use in roada
7、ble vehicular equipment, and commercial materials handling vehicles other than earthmoving and construction equipment, Combat - Special fuel tanks constructed and intended d. Class 4 primarily for use in tracked vehicles exposed to combat conditions. 2. APPLICABLE DOCUMENTS 2.1 Government documents.
8、 2.1.1 SDecifications and standards, The following specifications and standards form a part of this document to the extent specified herein. otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) an
9、d supplement thereto, cited in the solicitation (see 6.2). Unless SPECIFICATIONS FEDERAL QQ- S - 5 7 1 TT- C - 490 TT - E - 48 9 PPP-B- 601 PPP- T - 60 PPP- T - 97 MILITARY MIL-T- 704 MIL-C-1283 MIL-R-7575 MIL-R-9299 MIL-T-14442 MIL-L-21260 - MIL-C-46081 - Solder; Tin Alloy, Tin-Lead Alloy, and Lead
10、 Alloy. Cleaning Methods for Ferrous Surfaces and Pretreatments for Organic Coatings. Enamel, Alkyd, Gloss, Low VOC Content. Boxes, Wood, Cleated Plywood. Tape: Packaging, Waterproof. Tape, Packaging/Industrial, Filament Reinforced, Treatment and Painting of Materiel. Can, Gasoline, Military, 5-Gall
11、on. Resin, Polyester, Low Pressure Laminating. Resin, Phenolic, Laminating, Tank, Fuel, Engine: Nonmetallic Non- Self-sealing for Military Vehicles. Lubricating Oil, Internal Combustion Engine, Preservative and Break-in. Coating Compound, Thermal Insulating (Intumescent). 2 Licensed by Information H
12、andling ServicesMIL-T-LIb7bB 27 I 777770b 0457737 b I MIL-T-46786B STANDARDS FEDERAL FED-STD-H28 - Screw-Thread Standards for Federal Services. MILITARY MIL-STD-105 MIL-STD-129 MIL-STD-130 MIL-STD-193 MIL-STD-889 MS 35644 MS 35645 MS 51300 - Sampling Procedures and Tables for Inspection by Attribute
13、s. - Marking for Shipment and Storage. - Identification Marking of US Military Property. - Painting Procedures and Marking for Vehicles, Construction Equipment and Material Handling Equipment. Vehicles. Fording. Spill-Proof. - Dissimilar Metals. - Filler Neck: Fuel Tank - Military - Cap, Fuel Tank:
14、Tactical Vehicle, - Cap, Fuel Tank: Combat Vehicle, (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Bldg 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2.1.2 Other Government Dubl
15、ications. The following other Government publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation. DEPARTMENT OF TRANSPORTATION (DOT) 49CFR393 - Federal Motor Carrier Safety Regulation (FMCSR). (Copies of the
16、 DOT FMCSR are available from the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402-0001.) 2.2 Non-Government Dublications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents wh
17、ich are DoD adopted are those listed in the issue of the DODISS cited in the solicitation, of documents not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2). Unless otherwise specified, the issues AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM A 240 AS
18、TM A 308 ASTM A 366/A 366M ASTM A 569/A 569M - Heat-Resisting Chromium and Chromium- Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels. - Steel Sheet, Cold-Rolled, Long Terne Coated. - Steel, Sheet, Carbon, Cold-Rolled, Commercial Quality. - Steel, Carbon (0.15 Maximum, Percent), H
19、ot-Rolled Sheet and Strip Commercial Qual i ty . 3 Licensed by Information Handling ServicesI_ _1 MIL-T-i.1b78bB 29 499990b Oi.157738 8 MIL-T-46786B ASTM A 606 ASTM A 607 ASTM A 619/A 619M ASTM A 620/A 620M ASTM A 682 ASTM B 209 ASTM D 256 ASTM D 635 ASTM D 638 ASTM D 746 ASTM D 790 ASTM D 1238 ASTM
20、 D 1505 ASTM D 1525 ASTM D 1693 ASTM D 4066 Steel, Sheet and Strip, High-Stren th, Low-Alloy, Hot-Rolled and Cold-Rolfed, with Improved Atmospheric Corrosion Resistance. Steel, Sheet and Strip, High-Strength, Low-Alloy, Columbium or Vanadium, or Both, Hot-Rolled and Cold-Rolled. Steel, Sheet, Carbon
21、, Cold-Rolled, Drawing Quality, Steel, Sheet, Carbon, Drawing Quality, Special Killed, Cold-Rolled. Steel, Strip, High-Carbon, Cold- Rolled, Spring Quality, General Specification for. Aluminum and Aluminum-Alloy Sheet and Plate. Impact Resistance of Plastics and Electrical Insulating Materials. Rate
22、 of Burning and/or Extent and Time of Burning of Self-supporting Plastics in a Horizontal Position. Tensile Properties of Plastics. Brittleness Temperature of Plastics and Elastomers by Impact. Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials. Plow Rate
23、s of Thermoplastics by Extrusion Plastometer. Density of Plastics by the Density- Gradient Technique. Vicat Softening Temperature of Plastics. Environmental Stress-Cracking of Ethylene Plastics. Nylon Injection and Extrusion Materials (PA). (Application for copies should be addressed to the American
24、 Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103-1187.) AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME) Boiler and Pressure Vessel Code, Section IX, Welding and Brazing Qualifications. (Applications for copies should be addressed to the American Society of Mechanical Engi
25、neers, Inc., 345 East 47th Street, New York, NY 10017-2304.) AMERICAN WELDING SOCIETY (AWS) AWS D1.l - Structural Welding Code - Steel. AWS D1.2 - Structural Welding Code - Aluminum, (Application for copies should be addressed to the American Welding Society, Inc., 550 N.W. LeJeune Road, P.O. Box 35
26、1040, Miami, FL 33135-3030.) 4 Licensed by Information Handling ServicesMIL-T-4678bB 27 7797706 0457737 T W MIL-T-46786B NATIONAL MOTOR FREIGHT TRAFFIC ASSOCIATION, INC., AGENT National Motor Freight Classification. (Application for copies should be addressed to the American Trucking Association, In
27、c, , ATTN: Traffic Department, 2260 Mill Road, Alexandria, VA 22314-4654.) SOCIETY OF AUTOMOTIVE ENGINEERS, INC (SAE) SAE Handbook, Volume 1 - Materials. SAE 5403 - Chemical Compositions of SAE Carbon Steels. SAE 5512 - Automotive Tube Fittings. SAE 5829 - Fuel Tank Filler Cap and Cap Retainer. (App
28、lication for copies should be addressed to the Society of Automotive Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096.) :3 UNDERWRITERS LABORATORIES, INC. (UL) s UL 395 - Automotive Fuel Tanks. (Application for copies should be addressed to the Underwriters UNIFORM CLASSIFICATION COMMIT
29、TEE, AGENT Uniform Freight Classification Rules. Laboratories, Inc., 333 Pfingsten Road, Northbrook, IL 60062.) (Application for copies should be addressed to the Uniform Classification Committee, ATTN: Tariff Publishing Officer, Room 1160, 222 South Riverside Plaza, Chicago, IL 60606-5808.) the org
30、anizations that prepare or distribute the documents. These doc.uments also may be available in or through libraries or other informational services.) 2.3 Order of mecedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes
31、precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENT 3.1 DescriDtion. Unless otherwise specified (see 6.2), the fuel tank shall be of any configuration applicable to the equipment on which it is mounte
32、d. When specified (see 6.2), the minimum fuel tank requirements for the capacity specified shall conform to table I. specification conflict with the specification for a specific equipment, the requirements of the equipment specification shall govern. not be construed as precluding the equipment spec
33、ification from establishing additional requirements or limitations. Further, no requirements. in t:his specification shall be interpreted to preclude furnishing fuel tanks -n excess . of the specific minimum requirements. (Non-Government standards and other publications are normally availeble from 3
34、.1.1 Conflicting reuuirements. In the event the requirements of this 3.1.2 Additional reauirements. Requirements in this specification shall 5 Licensed by Information Handling Servicess -_s_. _ MIL-T-4L7bB 27 777770b 0457740 b W MIL-T-46786B TABLE I. Tank materials. I I I I II II II II II II II II I
35、II III III III III IV IV IV IV IV VI Mat er ia1 Terneplate Terneplate Terneplate Terneplate Steel . Steel Steel Steel Steel Steel Steel Steel Aluminum Aluminum Aluminum Aluminum Aluminum Plastic Plastic Plastic Plastic Plastic Rubber Non- Self-Seal- ing Ref er ence Standard ASTM A 308 Standard ASTM
36、A 308 Standard ASTM A 308 Standard ASTM A 308 Standard ASTM A 569lJ Standard ASTM A 240lJ Type 304 Type 304L Type 321 Standard ASTM A 619u Standard ASTM A 620 Standard ASTM A 240l.J Type 304 Type 304L Type 321 Standard ASTM A 366i.J Standard ASTM A 606iJ Standard ASTM A 607lJ Standard ASTM B 2092J S
37、tandard ASTM B 2092J Standard ASTM B 2092J Standard ASTM B 2092J Standard ASTM B 2092J 3/ 3/ 3/ . Each fuel tank, including its filler neck, shall be constructed to permit mounting in a location where it shall not be damaged by chafing with other parts of the equipment. be of a type that will not lo
38、osen when the fuel tank is attached to the equipment and the equipment is subjected to vibration encountered in operation and transport as specified in the equipment specification. When mounting straps are furnished, a barrier of fuel-resistant material shall be provided to prevent chafing of the st
39、raps and the fuel tank. suction tube or a standpipe as specified (see 6.2), and the fuel pickup point shall be not less than 1/2 inch above the bottom of the tank. the suction tube or standpipe shall be near the longitudinal center of the tank to preclude starving of the engine on grades or slopes.
40、3.5.10 Venting;. back from a fueling nozzle and from a military 5-gallon fuel can. Venting shall permit consumption of the fuel at twice the maximum volumetric capacity of the fuel pumps, without creating a vacuum in the fuel tank of more than 3 inches of mercury. neck to prevent fuel from escaping
41、through the vent should the fuel tank be filled to its utmost capacity. When specified (see 6.2), the venting system shall be separate from the filler cap. The venting system shall prevent the entrance of water, dirt, or foreign matter into the fuel tank. When specified (see 6.2), fuel tanks shall b
42、e vented above the fording depth of the equipment on which they will be installed. tank is subjected to fire, shall prevent internal tank pressure from exceeding 30 psig. , 3.5.6.3 Bayonet type dipstick. When specified (see 6.2), a bayonet type 4 capacity. The dipstick shall be etched, knurled, sand
43、blasted, or phosphate- The dipstick shall be marked in graduations of 3.5-7 Groundinq. Metal fuel tanks shall be metal-to-metal contact with 9 Mounting attachments provided shall 3.5.9 Suction tube or standpipe. The fuel tank shall be equipped with a The location of Fuel tanks shall be vented to acc
44、ept fuel without spill- Venting shall extend to the maximum height of the filler The venting system, in the event that the 3.6 TvDe and construction. 3.6.1 Type I fuel tanks. Type I fuel tanks shall be constructed of terneplate having a specified coating of not less than 0.45 ounce per square foot (
45、see table I). welded, arc welded, or seam welded, as applicable. When specified (see 6.2), type I fuel tanks shall be soldered. Joints and intersections shall be spot welded, projection Joints and intersections shall have seam 9 Licensed by Information Handling Services_I_- 9 -I MIL-T-467bB 27 = 977
46、77Ob OY57744 3 = - MIL-T-46786B welded lap joints, machine locks, or equivalent, as shown in figure 1. Solder shall conform to QQ-S-571, composition range SN 30 TO SN 70, form, type, size, and condition optional, When a corrosive flux has been used during soldering, the residue shall be removed, 3.6
47、.2 Tvue II fuel tanks, Type II fuel tanks shall be constructed of prime pickled, hot-or cold-rolled sheet or plate, steel or steel alloy (see table I). Joints and intersections shall be welded as specified herein. 3.6.3 TVDe III fuel tanks. aluminum alloy (see table I) conforming to the ASTM designa
48、tions for aluminum sheet and plate. 26,000 psi for sheet and plate. 3.6,4 TvDe IV fuel tanks, plastic conforming to current standards of the plastic fuel tank industry and as specified herein (see table I and 3.11). shall be as specified (see 6.2). following minimum requirements: Type III fuel tanks
49、 shall be constructed of Joints and intersections shall be welded. The aluminum alloy shall have a yield point of not less than Type IV fuel tanks shall be constructed of The specific plastic material used Plastic fuel tanks shall conform to the a. The exterior (depth of .O04 plus or minus .O01 inch) surface of all fuel tanks which are not pigmented with at least 2.5 percent carbon black plus or minus 0.25 percent shall contain 0.5 percent ultraviolet ray deterioration preventative, b. The plastic material shall contain a minimum of 0.025 percent concentration of antioxidant. T
