1、- C-A3 -30 tIIL-S-62l27A 23 7997906 0200960 7 28 December 1983 SUPERSEDING -= r A, J MIL-S-62127(AT) 10 March 1970 MILITARY SPECIFICATION i I Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: US A
2、rmy Tank-Automotive Comnand, ATTN: DRSTA-GBS.1, Warren, MI 48090, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this ! FSC-23301 . document or by letter. SEMITRAILER, COMPRESSED GAS CYLINDER: HELIUM, COMMERCIAL This specification is
3、approved for use by the U.S. Army Tank- Automotive Command, Department of the Army, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE i. i Scope. This specification covers 3 cornmerciai semitrailer for storing, transporting, and charging compressed heliu
4、m gas. The tandem axle semitrailer mounts 38 cylinders having a combined water capacity of not less than 340 cubic feet and a design working pressure of at least 2400 pounds per square inch gage (pcig). this specification are commercial items which shall be warranted as specified in the procurement
5、documents. Semitrailer procured under 2. APPLICABLE DOCUMENTS * 2.1 Government documents. * 2.1.1 Specifications, standards, and handbooks. Unless otherwise specified, the following specifications, standards, and handbooks of the - isszie listed in that issue of the Department of Defense Index of Sp
6、ecifications and Standards (DoDISS) specified in the solicitation form a part of this specification to the extent specified herein. SPECIFICATIONS PEDERAL * ZZ-T-38 1 - Tires, Pneumatic, Vehicular (Highway). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IH
7、S-,-,-MIL-S-b2L27A 23 W 999970b OZ007bL 9 W MIL-S-62127A(AT) MIL IT ARY MIL-V-2 - MIL-T-5542 I STANDARDS MILITARY MIL-STD-1223 - MS7 5021 - Valve, Cylinder, Gas (For Compressed or Liquefied Gases), General Specifications For . Thread Compound, Antiseize and Sealing, Oxygen Systems . Non-Tactical Whe
8、eled Vehicles Treatment, Painting, Rustproofiiig, Identification Marking, and Data Plate Standards. Connector, Receptacle, Electrical - 12 Contact, Intervehicular, 28-V01t, Waterproof. * 2.1.2 Other Government documents, drawings, and publications. The following other Government documents, drawings,
9、 and publications form a part of this specification to the extent specified herein. DEPARTMENT OF TRANSPORTATION (DOT) Federal. Motor Carrier Safety Regulations. Federal Motor Vehicle Safety Standards. Regulations Governing Transportation of Dangerous Articles ia Tank Motor Vehicles, (Application ?o
10、r copies should be addressed to the Department of Transportation, Federal Highway Administration, Washington, D.C. 20591 ) (Copies of specifications, standards, handbooks, drawings, and publications required by manufacturers in connection with specific acquisition functions should be obtained from t
11、he contracting activity or as directed by the contracting officer.) * 2.2 Other publications, The following document(s) form a part of this specification to the extent specified herein. documents which are indicated as DoD adopted shall be the issue listed in the current DoDISS and the supplement th
12、ereto, if applicable, The issues of the AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASKE) Power Test Code PTC 19.5:4 - Supplement on Instruments and Apparatus; Part 5, Chapter 4, Flow Measurement by Means of Standardized Nozzles and Orifice Plates. Boiler and Pressure Vessel Code, Section VI11 I *. w
13、2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- mIL-S-62127A 23 999990b O200962 0 (Copies of the ASME Power Test Code may be obtained from the American Society of Mechanical Engineers, United Engineering Center, 345 East 47th Street, New York, NY
14、10017.) COMPRESSED GAS ASSOCIATION, INC. (CGA) e Pamphlet S-1 Safety Relief Device Standards. (Copies of the CGA pamphlet may be obtained from the Compressed Gas Association, Incorporated, 1235 Jefferson Davis Highway, Arlington, VA 22202.) * SAE, INC. SAE Standards and 53 18 3 5560 * 5588 5682 5700
15、 5702 51292 Recommended Practices - Air Brake Gladhand Service (Control) and Emergency (Supply) Line Couplers - Trucks, Truck-Tractors, and Trailers (DOD adopted). - Seven-Conductor Electrical Connector for Truck-Trailer Jumper Cable. - Turn Signal Lamps. - Rear Wheel Splash and Stone Throw Protecti
16、on (DoD adopted). - Fifth Wheel Kingpin, Commercial Trailers and Semitrailers (DoD adopted). - Brake and Electrical Connection Locations (DoD adopted). - Automobile, Truck, Truck-Tractor, Trailer and Motor Coach Wiring. (Application for copies should be addressed to SAE, Inc., 400 Commonwealth Drive
17、, Warrendaie, PA 15096.) THE TIRE AND RIM ASSOCIATION, INC. Yearbook. (Application for copies should be addressed to The Tire and Rim Association, Inc., 3200 W. Market Street, Akron, OH 44313.) (Industry association specifications and standards are generally available for reference from libraries. T
18、hey are also distributed among technical groups and using Federal agencies.) * 2.3 Order of p.recedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specification shall take precedence. 3 Provided by IHSNot for ResaleNo reproduc
19、tion or networking permitted without license from IHS-,-,-MIL-S-bZL27A 23 W 94999Ob 0200963 2 m MIL-S-62127A(AT) 3, REQUIREMENTS 3.1 Standard vehicle and accessories. Except as specified in 3.1.1 through 3.1.1.2, the vehicle, components, assemblies, and accessories to be delivered under the contract
20、 shall be the manufacturers standard or optional items, which meet or exceed the requirements of this specification. represented and rated in the vehicle and equipment manufacturers technical data except the general configuration shall be as shown in figure 1. Technical data shall be limited to spec
21、ifications and technical material, identical to that furnished to the authorized company representatives for selection of vehicle models and components, and shall be on file in the engineering offices of the procuring activity prior to delivery of the items. The vehicle and furnished accessories sha
22、ll comply with all Federal Motor Vehicle Safety Standards in effect on the date of manufacture. All vehicle items shall be as 3.1.1 Special requirements. In addition to the standard vehicle and components specified in 3.1, the vehicle shall be furnished with special equipment as specified herein. *
23、3.1.1.1 Treatment, painting identification marking and data plates. As specified by the procuring activity for the appropriate service (see 6.2), treatment, painting, identification marking, and data plates shall be In accordance with MIL-STD-1223. 3.1.1.1.1 Type gas. The name of the gas, “HELIUM,“
24、shall be painted on each side of the semitrailer forward of the control cabinet assembly in block letters 4 inches high. HELIUM ONLY“ shall be painted on the inside and outside of each control cabinet assembly rear access door in block letters 2 inches high. The lettering “FOR USE WITH 3.1.1.1.2 Con
25、trol marking. All valves, gages, controls, and indicators used in operation of the semitrailer shall be identified by securely attached nameplates of such composition that exposure to oil; dirt, light and moisture will not fade or cause them to become eradicated, 3.1.1.2 Drain plugs. All drain plugs
26、 installed throughout the Semitrailer for the purpose of draining lubricants shall be of the magnetic type. 3.2 Vehicle weight and ratings. 3.2.1 Curb weight. The curb weight of the semitrailer shall include all attachments, accessories, equipment and the 38 helium pressure vessels installed on the
27、vehicle. 3 . 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.2.2 Payload. The payload capacity shall be defined as the weight of 52,000 cubic feet of helium gas at 2,400 psig. purpose of computing the payload distribution on the suspension and ki
28、ngpin it shall be considered as 1,000 pounds. For the 3.2.3 Gross weight. The gross weight of the semitrailer shall consist of the curb weight and payload. 3.2.4 Ratings. Vehicle ratings shall be the manufacturers - published ratings. to meet the requirements of this specification. are not available
29、, verification of ratings must be submitted to the engineering office of the procuring activity. Component and vehicular ratings shall not be raised When published ratings * 3.3 Design. The semitrailer shall be designed to provide a readily mobile high-pressure gas storage pressure vessel assembly s
30、uitable for filling with helium gas at a generating site or railroad siding, transporting the gas to a using location, storing the helium gas, and charging the gas with the using apparatus at high flow rates. The semitrailer cylinder mountings and hold down devices shall be designed to withstand an
31、acceleration factor of 1-1/2 g (g = gross weight of the semitrailer), for a minimum of 0.1 second in any and all directions. ambient temperatures up to plus 160 degrees Fahrenheit (OF) and exposure to solar radiation. The complete system shall be capable of withstanding 4 3.4 Performance. Performanc
32、e shall be demonstrated with the loaded semitrailer equipped with all attachments, accessories, and the 38 pressure vessels; completely serviced and adjusted; and when being towed by a towing vehicle. The semitrailer shall be capable of being towed over improved roads at speeds up to 55 miles per ho
33、ur (mph), and over dry improved gravel roads at speeds up to 10 mph with no evidence of failure, malfunction, or deformation of the semitrailer, components, attachments or accessories. 3.4.1 Tracking ability. The semitrailer shall follow the towing vehicle over dry, level, smooth, prepared, hard-sur
34、faced roads and over dry improved and gravel roads without exceeding the specified in Federal Motor Carrier Safety Regulation 393,70(a). coupled to the towing vehicle, operating in its minimum turning circle, the semitrailer shall follow without cramping or side slipping. semitrailer shall be capabl
35、e of assuming an angle of not less than 90 degrees with the longitudinal axis of the towing vehicle without cramping or damage to the Semitrailer or the towing vehicle. tracking deviations When The 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-nL
36、L-s-bdL27A 23 999990b 0200965 b 3.4.2 Service brakes, The service brakes shall control, decelerate and stop the semitrailer-tractor combination with the semitrailer loaded with specified payload, within the stopping distance requirements of Federal Motor Carrier Safety Regulations 393,45 through 393
37、.52, * 3.5 Dimensions and clearances. The minimum dimensions and clearances shall be as specified in table I, when measured with the semitrailer uncoupled from the towing vehicle, resting on the landing gear and tires, with the semitrailer horizontal to ground level, and without payload. TABLE I. Di
38、mensions and clearances. 3,6 Chassis components. * 3.6.1 Chassis. Chassis components and vehicle ratings shall be the manufacturers published ratings. Axle, suspension, wheel and tire ratings shall be for highway speeds (over 50 mph). Chassis construction shall be the manufacturers standard frame or
39、 frameless type, but in either case the structural integrity requirements of DOT Safety Regulation 178.340 shall be met, Structural members shall support the running gear, upper fifth wheel plate and landing gear. * 3,6.1.1 Frame, Semitrailer frame members shall be adequately braced with a sufficien
40、t number of crossmembers to insure stability, When the vehicle is loaded with specified payload (see 3.2,2), the maximum fiber stress in any frame member shall be not greater than 33 percent of the yield strength of the materials used, Under all conditions of operation, the frame members shall maint
41、ain chassis alinement without applying stress to the bulkheads, the cabinet or the - c Feature I Dimension Overall length (feet) (max.) ! 30 Overall width (inches), (plus or minus 1 inch) 95 Upper fifth wheel height, from ground to underside of the Dietance from centerline of kingpin to front end of
42、 the Swing radius from centerline of kingpin to most distant upper fifth wheel plate (plus 1 inch, minus O) 50 semitrailer (plus 1 inch, minus 2 inches) 34-112 point on the semitrailer nose (not more than) (inches) 60 I i Landing wheel clearance (radius from centerline of the kingpin to any point 6
43、inches below the upper fifth i ! ! wheel plate) (not less than) (inches) 82 Ground clearance, max. possible but not less than (inches) , 14 , 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-pressure vessels. of the load space. The rear crossmember
44、shall extend the full width of the semitrailer. All parts of the frame shall be completely electric-arc welded. Shear and moment diagrams with maximum deflection calculations for the semitrailer loaded shall accompany each questionnaire (commercial vehicle engineering data). members are spliced, joi
45、nts shall be reinforced to fulfill the dynamic loading requirements and the static loading requirements. be designed to avoid stress concentration. Splice welds shall be continuous. The outside frame members shall run the full length Where frame Splices shall * 3.6.2 Rubber mounted suspension system
46、. The semitrailer shall be furnished with a completely rubber mounted suspension system without radius rods, except that the spring mounting which compensates for horizontal movement need not be mounted in rubber. The rubber mounted suspension system, with components, shall have a rated capacity at
47、least equal to the loads imposed upon each member, measured at the ground, with the semitrailer loaded with rated payload as specified in 3.22. men the suspension is rated at the spring pads, the unsprung weight shall be deducted. Clearances shall preclude interference between tires and any other pa
48、rt of the semitrailer under the operating conditions specified herein. 3.6.3 Tandem axle. Tandem axles shall be furnished. Axle ratings shall be at least equal to the load imposed on each axle, measured at the ground with the semitrailer loaded with rated payload as specified in 3.2.2. The wheel bea
49、rings and axle spindles shall be oil lubricated. The oil viscosity shall be in accordance with the manufacturers recommendations. The hubs shall be fitted with seals. The hub caps shall have a window and shall incorporate provisions for replenishing the oil supply. or an equivalent method of withstanding pressures without leakage. a The hub caps shall incorporate provisions for venting 3.6.4 Wheels, rims, tires and tubes. * 3.6.4.1 Wheels, rims and tires.
