1、D MIL-T-26069C (USAF) 10 June 1969 SUPERSEDING MIL-T-26069B (USAF) 22 January 1963 MILITARY SPECIFICATION TRAILER, OXYGEN CYLINDER, AFh432R-3, HIGH AND LOW PRESSURE, 2 WHEEL 8 CYLINDER CAPACI= 1. SCOPE 1.J This specification covers an eight-cylinder-capacity, 2-wheel, high and low pressure trailer d
2、esignated AF/M32R-3. 2. APPLICABLE DOCUMENTS 2.1 The following docments of the issue in effect on date of invitation for bids or request for proposal form a part of this specification to the extent specified herein. SPECIFICATIONS Federal L-S-300 QQ-P-416 QQ-2-325 RR-c-901 TT-C-490 TT-P-636 W-T-81 P
3、PP-B-601 PPP-B-62 1 Sheet and Tape, Reflective, Nonexposed Lens, Adhesive Backing Plating, Cadmium (Electrodeposited) Zinc Plating (Electrodeposited) Cylinder; Steel, Seamless, Type 3A (For Cm- pressed Gases) Cleaning Method and Pretreatment of Ferrous Sur- faces .for Organic Coatings Primer Coating
4、, Synthetic, Wood and Ferrous Metal Tags; Shipping and Stock Boxes, Wood, Cleated Plywood Boxes, Wood, Nailed and Luck Corner Hilitary MIL-C-104 Crates, Wood, Lumber and Plywood Sheathed, Nailed and Bolted MIL-P-116 Preoervation, Methods Of IUL-T-704 Treatment and Painting of Haterial MIL-H-3 17 1 M
5、agnesium Alloy, Process for Corrosion, Protec- tion Of MIL-c-3774 Crates, Open Wood (2500 to 10,000 Pounds) DOCUMENT CONTAINS ib PAGE8 FSC 2330 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4 MIL-T-2b069C lb m 9777906 02q7308 T m MIL-T-26069C (USAF
6、). MIL-V-47 19 MIL-C-4810 MIL-W-8005 MIL-A-842 1 MIL-P -8585 MIL-C-15074 MIL-B-22182 MIL-B-26195 MIL-H-26633 MIL-T-27602 MIL-T-27730 STANDARDS Military MIL-STD-129 MIL-STD-130 MIL-STD-143 MIL-STD-281 MU-STD-808 MIL-STD-1186 W33586 W33656 M51336 Valve, Oxygen Line, High Pressure Aircraft Servicing Cy
7、linder, Oxygen Purifier, Type MB-1 Wheels and Hubs, for Industrial Pneumatic Tires Air Transportability Requirements, General Sped- fication For Primer Coating, Zinc Chromate, Law-Moisture- Sensitivity Corrosion, areventive, Fingerprint Remover Brakes, Parking, Mobile Ground Support Equip- ment. Box
8、es, Wood-Cleated, Skidded, Load Bearing Base Hose Assembly, Polytetra Fluoroethylene, Oxygen Trichloroethylene, Oxygen Propellanf Compatible (By Flushing Methods) Tape, Antiseize, Polytetrafluoroethylene with Dispenser Marking for Shipment and Storage Identification Marking of U.S. Military Pro- per
9、ty Specifications and Standards, Order of Pre- cedence Automobile, Trucks, Truck-Tractors, Trailers and Trailer Dollies, Preservation and Packaging Of Finishes, Protective, and Codes for Finishing Schemes for Ground and Ground Support Equipment Cushioning, Anchoring, Bracing, Blocking and Waterproof
10、ing with Appropriate Test Methods Metals, Definition of Dissimilar Fitting End, Standard Dimensions, for Flared Tube Connecfiion and Gasket Seal Lunette, Coupler, Drawbar, Ring Air Force-Navy Aeronautical AN780 M800 AN805 AN912-1 M9 10 M6027 AN917-2 AN911 Nipple-Union Cone-Union Nut-Union Bushing, R
11、educer Coupling Filler Adapter .Tee Nipple-Union 2 “ Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-26069C (USAF) 2.2 Other publications, The following documents form a part of this speci- fication. Unless otherwise specified. the issue in eff
12、ect on date of invita- tion for bids shall apply. Interstate Comnerce Commission 49 CFR 71-78 Interstate Comnerce Comnission Rules. and Regu- lations for the Transportation of Explosives 3AA and Other Dangerous Articles 3AA2400 Seamless Steel Cylinders (The Interstate Comnerce Conmission regulations
13、 are not a part of the Code of Federal Regulations, 1949 Edition-Revised 1950, available from the Super- intendent of Documents, Government Printing Office, Washington 25, D.C. Orders for the above publication should cite “49 CFR 71-78, Rev 1950“). Compressed Gas Association, Incorporated Pamphlet V
14、-1 Compressed Gas Cylinder Valve Outlet and Inlet Connections (Copies of the CGA pamphlet may be obtained from the Compressed Gas Associa- tion, Incorporated, 11 West 42nd Street, New York 18, New York.) 3. REQUIREMENTS * 3.1 Preproduction. This specification makes provisions for preproduction testi
15、ng. 3.2 Components. The trailer shall consist of the following major components: Description See Requirement a. Trailer chassis 3.7 b. Storage cylinders 3.8 C. Manifold system 3.9 d. Purifier 3 .lo e. Regulator 3 .ll f. Servicing hose assembly 3.12 g. Servicing valve 3.13 h. Filler adaptor 3.14 3 Pr
16、ovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-M1L-T-2b0bqC 36 H 977770b 02q70 m WliL-T-26069C (USAI?) i. Connecting lines 3.15 j. Control panel 3.16 k. Utility box 3.17 3.3 Selection of specifications and standards. Specifications and standards for n
17、ecessary comodities and services not specified herein shall be selected in accordance with MIL-STD-143, except as specified in 3.3.1. 3.3.1 Standard parts. MS and AN standard parts shall be used where they suit the purpose. They shall be identified on the drawings by their part numbers, 3.4 Material
18、s. 3.4.1 Protective treatment. When materials are used in the construction of the trailer that are subject to deterioration when exposed to clmatic and environmental conditions likely to occur during service usage, they shall be protected against such deterioration in a manner that will in no way pr
19、event compliance with the performance requirements of this specification. The use of any protective coatings that will crack, chip or scale with age or extremes of climatic and environmental conditions shall be avoided. 3.4.2 Diesimilar metals. Insofar as practicable, dissimilar metals in con- tact
20、with each other shall be avoided. However, metal plating or metal spray- ing of dissimilar base metals, to provide similar or suitable abutting sur- faces, shall be permitted, The use of dissimilar metals separated by suitable insulating material shall be permitted. Dissimilar metals are defined in
21、M533586 . 3.5 Desim and construction, The trailer shall be designed and constructed so that no parts will work loose in service. It shall be built to withstand the strains, jars, vibrations, and other conditions incident to shipping, storage, installation and service. 3.5.1 Adjustments and repairs,
22、The trailer shall be constructed so that adjustments and repairs can be easily made by the personnel of operating units and overhaul bases. 3.5.1.1 The trailer shall be designed to permit operation and routine win- tenance by personnel wearing arctic clothing. The requirements for routine maintenanc
23、e shall be minimized. 3.5.2 Center of gravity. The weight of the camplete trailer with full cylin- ders propekly mounted shall be so distributed that an approximate weight of 75 pounds is placed on the retractable wheel. 3.5.2.1 Ground clearance. The trailer ehall have a minimum ground clearance of
24、8 inches or lunette eye heights ranging from 12 to 26 incheo. 4 ,- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-26067C 36 m 7777706 02q7LLL T m MIL-T-26069C (USAI?) 3.5.3 Acceleration forces. The trailer shall be designed and constructed to
25、withstand the acceleration forces incident to operating under prescribed con- ditions and the acceleration forces specified in MIL-A-8421. 3.6 Performance. The trailer shall be capable of operating under the follow- ing conditions: a. Operating temperatures from -20 to +130 degrees F, unless otherwi
26、se specified (see 6.2) b Storage temperatures from -20 to +160 degrees F, unless otherwise specified (see 6.2) . c. Being towed at speeds of 20 to 30 mph over improved roads (see 6.3a). d. Being towed at speeds of 10 to 15 mph over unimproved roads (see 6.3b) . e. Right and left turns at minimum rad
27、ius of 18 feet at a speed of 10 mph. f. Exposure to airborne sand and dust particles encountered in normal and desert operation. e g. Exposure to atmosphere containing salt-laden moisture. h. Exposure to freezing rain. i. Subjection to sudden stops fram an initial speed of 30 mph over improved roads
28、. 3.6.1 Hydrostatic pressure. The muanifold and piping system shall be capable of withstanding a hydrostatic pressure of 4000 psi. 3.7 Trailer chassis. The trailer components shall be mounted on a two-wheel trailer chassis having a caster-type retractable third wheel for mobility purposes and for fa
29、cilitating the hitching of the trailer to the towing vehicle. The space on the chassis shall accunodate eight high-pressure oxygen storage cylinders as shown on figure 1. 3.7.1 Tawbar. The chassis shall have a towbar designed for towing by vehicles having a pintle height of 12 to 26 inches and equip
30、ped with a lunette eye con- forming to MS51336. The lunette eye shall not weigh more than 4 pounds and shall have a wall thickness of not less than 1/8 inch. 3.7.2 Parking brakes. Two-wheel parking brakes shall be provided conforming to MIL-B-22182. The parking brakes shall be capable of locking the
31、 wheels so that the tires will slide relative to the ground and not roll on dry, level concrete when the trailer is subjected to a towing force sufficient to move the vehicle. The parking brakes shall be capable of holding the loaded trailer stationary on a 30 percent grade. 5 Provided by IHSNot for
32、 ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-2bObSC 3b W 777SSOb 0247LL2 L H MIL-T-26069C (USAF) 3.7.3. Wheels and hubs. The two main wheels and hubs with not less than 6-ply tires and tubes shall be size 6.00-9. The retractable third wheel shall be o the two pos
33、ition type equipped with a hand crank for elevating to the locked up and down position. The third wheel shall be capable of carrying three times the imposed load, easily rolling over temporary metal runways and shall be of the non-sparking type. Main wheels, hubs, tires and tubes shall conform to MI
34、L-W-8005. This will be free running, non-directional, rib type tread tires. 3.8 Storage cylinders. Eight oxygen storage cylinders shall be furnished conforming to RR-C-901 and ICC Specification 3AA. Each storage cylinder shall have an internal water volume of not less than 2630 cubic inches. Each st
35、orage cylinder shall have a working pressure of 2400 psi. 3.8.1 Cylinder valve. Each storage cylinder shall be provided with an oxygen cylinder valve conforming to National Cylinder Gas Company No. 202 or equal. 3.8.2 Cylinder mounting racks. The cylinders shall be mounted lengthwise on the trailer
36、so that each cylinder can be removed separately without disturbing the other cylindera. This shall be accanplished by mounting the cylinders on individual troughs with adequate supporting framework, one cylinder above the other as shown in fig. 1, The troughs shall be adequately perforated to pre- v
37、ent accumulation of water therein in the normal position of the trailer. Provisions shall be made to permit easy loading of the cylinders with rollers or other devices. 3.8.2.1 Cylinder clamps. A quick acting and easily accessible bar clamping arrangement, designed to hold the cylinders in place sha
38、ll be provided. 3.8.2.2 Bulkhead. A storage cylinder bulkhead with openings for each cylinder neck shall be provided as shown in figure 1. 3.9 Manifold system. The cylinder manifold system shall be constructed of materials entirely suitable for the purpose and shall be designed for a work- ing press
39、ure of 2400 psi. The cylinders shall be manifolded together and connected to the high-pressure and low-pressure system as shown on figure 2. 3.9.1 Individual pressure gages. - Individual moisture proof pressure gages shall be provided for each storage cylinder. The gages shall have a pressure range
40、of O to 4,000 psi and shall be 2 1/2 inches in size. The gages shall be a part of the manifold system and valves (see figure 2). Gages will be accurate to within 1 percent. Pressure gages shall be the manufacturers standard type including dials and marking of dials-. 3.9.2 Intermediate control valve
41、s. Intermediate control valves shall be fur- nished-for each cylinder between the pressure gage (see 3.9.1) and the mani- fold as shown on figure 2. Intermediate control valves shall be Circle Seal Part Nr. B923T+PP(P) or equal. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted
42、without license from IHS-,-,-MIL-T-26067C 36 m 7779706 02Ll7Ll13 3 W MIL-T-26069C (UM) 3.9.3 Recharging valve. A recharging valve shall be incorporated in the manifold system to provide facilities for recharging the storage cylinders without removing the cylinders from the trailer. The valve shall b
43、e Circle Seal Part Nr: B923T-2PP(P) or equal. The valve control shall be located on the control panel and the valve outlet shall be located behind the control panel. The valve outlet shall be compressed Gas Association outlet No. 541 with cover, The valve shall be designed for a working pressure of
44、2400 psi. 3.9.4 Manifold S-hut-off valve. A manifold shutoff valve, Circle Seal Part Number B923T-2PP(P) or equal shall be provided betweenthe purifier cylinder and the regulator as shown on figure 2. 3.9.5 Servicing pressure Page. A pressure gage with a 4 112 inch dial dia- meter shall be provided
45、to indicate the servicing and regulator outlet pres- sure. The gage shall have a scale range of O to 3000 psi, shall be accurate to within one percent of full scale and shall have a safety back, The gage face shall have figure intervals indicating each 500 psi increment plus inter- mediate interval
46、graduations indicating 50 psi increments throughout the entire range. The gage shall be redlined above 2400 psi. 3.9.6 Thread sealer. Tetrafluoroethylene tape conforming to MIL-T-27730 01 other pipe thread sealing materials specifically approved by the procuring activity shall be applied to all pipe
47、 thread fittings before assembly. 3.10 Purifier. One Type MB-1 purifia cylinder conforming to MIL-C-4810 shall be placed in the line as shown on figure 2, a 3 .Il Regulator. A regulator shall be provided for a normal working pressure of 2400 psi. It shall be adjustable to any outlet pressure setting
48、 between O psig and 2400 psig inclusive. The inlet and outlet shall be permanently marked. 3.12 Servicing hose assembly. The servicing hose assembly shall conform to MIL-H-26633. High pressure (2000 psig) and lm pressure (475 psig) service hoses and outlets shd11 be provided in accordance with figur
49、e 2. 3.12.1 Safety wiring. All components of the servicing system from the filler adapter back to and including the outlet on the trailer shall be safety wired and sealed as shown on figure 3. The safety wire shall be drawn taut and sealed as shown. Safety wire shall be 0.032 inch steel wire. Seals shall be lead, approximately 3/8 inch in diameter. 3.12.2 Servicing relief valve. A safety relief valve shall be incorporated in the low pressure servicing hose im
