1、MIL-T- 18652A (OS) 25 SeDtember 1973 SUPERSEDING MIL-T-18652 (NORD) 24 June 1955 MILITARY SPECIFICATION TANKS, CARTRIDGE, POWDER, ROCKET (STEEL) This specification has been approved by the Naval Ordnance Systems Command, Department of the Navy. 1, SCOPE 1.1 SCOP:. This specification establishes the
2、requirements for steel cartridge, powder, and rocket tanks. 1.2 Classification. The tanks shall be of the following typss: Type I Cartridge tanks for fixed ammunition (cartridges with projectiles) Type II Cartridge tanks for cartridges of separated ammunition (without projectiles) Type III Powder ta
3、nks for propelling charges (powder in bags) Type IV Rocket tanks for rocket ammunition. 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on the date of invitation for bids or request for proposal form a part of this speci- fication to the extent specified herein. SPECIFICAT
4、IONS Federal QQ- Z - 32 5 Zinc Coating, Electrodeposited; Requirements for i Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-lb52A AL 997770b 0424262 7 W .t MIL-T- 18652A (OS) TT-C- 490 TT-P-1757 Mi li tary MI L- W- 86 1 1 MIL-W-12332 MIL-E-166
5、63 MIL - G- 8 1 32 2 STANDARDS Federal FED-STD-141 FED-STD-59 5 Mi 1 it arv MIL-STD- 105 MIL-STD-129 MIL-STD-248 Cleaning Methods and Pretreatment of Ferrous Surfaces for Organic .Coatings Primer Coating, Zinc Chromate, Low Moisture- Sensitivity Welding, Metal Arc and Gas, Steels, and Corro- sion an
6、d Heat Resistant Alloys; process for Welding, Resistance, Spot, Seam, and Projection (For Fabricating Assemblies of Low Carbon Steel) Enamel, Semi-Gloss (For Metal Surfaces of Ammunition and Ammunition Containers) Grease, Aircraft, General Purpose Wide Temperature Range Paint, Varnish, Lacquer and R
7、elated Materials; Method of Inspection, Sampling and Testing Colors (Requirements for Individual Color Chips (3 x 5 supplements) should be submitted to the Naval Supply Depot, Philadelphia, citing FEJI- STD-595 together with appropriate chip number as shown therein.) Sampling Procedures and Tab les
8、for Inspection by Attributes Marking for Shipment and Storage Welding and Brazing Procedure and Performance Quali fi cat ions Pub li cat ions 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-0 . O MIL-T-Lb52A L W 777770b 042LI263 7 MIL-T-18652A (OS)
9、 DRAWINGS Bureau of Naval Weapons 990 85 Load Test for Ends of Tanks (Copies .of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be obtained from the procurement activity or as directed by the contracting officer.)
10、3. REQUIREMENTS 3.1 General manufacture. Manufacture of all parts shall proceed in accordance with the requirements of contract, order or requisition, appropriate drawings, and this specification, 3.2 Materials. All materials used in the manufacture of these tanks shall conform to the specifications
11、 listed herein and to the specifications referred to on respective drawings, unless specific approval in writing, covering a departure therefrom, has been obtained from the Government prior to manufacture or use, materials or methods of manufacture are specified, the bidders selections shall be stat
12、ed clearly in the proposal, When alternate 3.3 Conformance to drawings, All dimensions shall be accurate within the tolerances specified on the drawings or in the applicable specifications, unless otherwise stated in the contract, order, or requisition. 3.4 Surface. All parts shall be finished as pr
13、escribed on applicable dpawings and specifications unless otherwise stated in the contract. 3.5 Interchangeability. All parts shall be capable of interchange- able assembly without interferences, binding, or misalignment. All parts comprising a permanently joined unit (as by welding) and the unit th
14、us formed shall be capable of interchangeable joining in the assembled unit and assembly. 3.6 Gages. The contractor shall provide whatever production gages are necessary and adequate to ensure complete interchangeability of all parts, and to determine that all dimensions are within the tolerances 3
15、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I_ I MIL-T-lt652A 1 W 777770b 0424264 O W MIL-T- 18652A (OS) shown on the applicable drawings. If so stipulated in the procurement document, the Government will furnish drawings.of pertinent Navy Final
16、Inspection Gages for guidance in design of the contractors inspection gages, responsibility in design and manufacture of other production gages as may be required for the satisfactory fulfillment of contract require- ments, Such procedure shall not serve to relieve the contractor of his 3.7 Top ring
17、. The top ring shall be assembled on the tank with its axis coincident with that of the tank body. The pressure or helical bearing surfaces of the top ring and the top of the cover ring, which serve to secure the cover to the tank, shall be a smooth true helix, with the axis coinciding with the axis
18、 of the tank, There shall be no tendency for the outside cylindrical surface of the cover ring to jam or bind with the opposing inside cylindrical surface of the top ring. on the applicable drawings , All coincident axes shall be within tolerances specified 3,8 Gasket and gasket bearing surface, The
19、 gasket shall be cemented in the cover with an adhesive cement approved by the Government, and the exposed bearing surface shaii be coated with talc or graphite to prevent sticking to the bearing surface of the tank. The gasket bearing surface of the tank shall be formed, turned, or otherwise *machi
20、ned to produce a smooth continuous surface perpendicular to the axis of the tank within tolerances specified on the available drawings, and opening of the tank, and shall ensure proper seating of the gasket. The gasket shall provide sealing at closure of the cover, Bearing surfaces shall not injure
21、the gasket during closing (See 3,15,) 3,9 Locking rings. For tanks fitted with tongue and groove locking rings, the tongues and grooves of the adjacent tanks shall so fit with each other that bearing between neighboring locking rings shall be on top of the tongues or ridges and on the bottom of the,
22、 grooves. There shall be no tendency for tongues to wedge in grooves, nor shall bearing between the tanks take place on the outer cylindrical surface of the top ring between the top edge and the locking rings. 3.10 Cover ring. The axis of the cover ring shall be perpendicular to the surface of the c
23、over which forms a seat for the gasket and shall be coincident with the axis of the helical bearing surface within tolerances specified on applicable drawings, The cover ring and cover, when in the unlocked position, shall be easily removed from the top ring at any of the positions in which it may b
24、e assembled to any tank, 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-1652A 1 m 7777706 0424265 2 m MIL-T-18652A (OS) 3.11 Cover. The sheet aluminum .cover shall be free to turn with respect to the cwer rixg after the cover has been rolled
25、 into the groove in the cover ring. rust inhibiting grease, in accordance with MIL-G-81322, shall be applied between all sliding surfaces of the cover, At assembly, a thin continuous coating of 3.12 Bottom. The axis of the outside cylindrical surface of the bottom shall coincide with axis of the tan
26、k body and the top ring within tolerance specified on the applicable drawings, surface shall be perpendicular to the tank axis and parallel to the top surface of the top ring within tolerances specified on the applicable drawings , The bottom 3.13 Interior fittings. The interior fittings shall be tr
27、ue to form and all surfaces and edges shall be smooth and free from pro- jections, sharp edges, rough spots , and similar defects that would tend to damage the contents, interfere with the assembly or loading of the tanks, or injure personnel, All supporting and positioning fittings shall be concent
28、ric, and the bottom surface on which the fittings rest shall be perpendicular, within tolerances specified on the applicable drawings, to the axis of the fittings so that the contents will be properly aligned in the tank. diaphragms are used, diaphragms shall be parallel and at right angles to theaa
29、xic of the tank within tolerances specified on the applicable drawings. If an extractor is used in the cartridge tanks, the extractor shall slide freely between the tank body and the cartridge case to ensure easy withdrawal of the cartridge, “here multiple 3.14 Cleaninn. oreDaration of surfaces. and
30、 oaintinn, 3.14.1 Plating, Unless otherwise specified or shown on the applicable drawings, all steel tank cover parts shall be zinc plated in accordance with QQ-2-325, type II, class 2. The entire tank and component parts may be plated, if specifically called for, in accordance with the applicable d
31、rawings. 3.14.2 Painting. All surfaces of the tank shall be thoroughly cleaned and dried before painting. After assembly, all surfaces both inside and outside of the tank, except those surfaces which are plated, shall be treated in accordance with TT-C-490, type I (zinc phosphate coated), given one
32、coat of primer and one coat of enamel, The primer shall be in accordance with TT-P-1757, color Y, and the enamel shall be in accor- dance with MIL-E-16663, blue gray, color No, 26231 of FED-STD-595, so that the dry film thickness of the primer and enamel shall be 1,s to 2.0 mils. 5 Provided by IHSNo
33、t for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T- 18652A (OS) The primer coat shall be allowed to dry hard before the final cover coat is applied. The method of applying the primer and the enamel shall be as shown on the applicable drawings or as approved by the
34、 government, The finished painted surface of the gasket seat shall be hard, dry, and smooth, 3.14.3 Corrosion resistance and paint adhesion. When tested in accordance with 4.6,s the treated and painted tanks shall withstand exposure to salt spray test as specified in 4.6.5. The paint film shall show
35、 no evidence of wrinkling, blistering, cracking, powdering, or flaking in areas adjacent to the scribing, nor shall there be any evidence of corrosion on any other exposed surface of the tanks when tested in accordance with FED-STD-141, method 6061, 3.15 Airtightness. All tanks shall be capable of w
36、ithstanding the internal air pressure tests of section 4.6.1 and 4.6.2 without evidence of any structural weakness or permanent deformation. Forma- tion of air bubbles shall be sufficient evidence of leaks serious enough to reject the tank or cover. 3.16 Serviceability. While Weight loaded and teste
37、d in accordance with 4,6.3, the covers of the tanks shall be easily tightened, loosened, applied, or removed, and the contents shall be easily removed from the tank, After removal of the loads, the tanks top rings and bottoms shall show no permanent deformation. 3.17 Drop test, Upon completion of dr
38、op tests in accordance with 4.6,4, the airtightness (3.15) and serviceability (3.16) requirements shall apply. 3.18 Marking. All marking or stamping on the tanks shall be as shown on the applicable drawings, Stamped or embossed lettering on the cover, body, and interior fittings of the tank shall be
39、 legible after the tank has been completely finished. 3,19 Welding. All surfaces to be welded shall be thoroughly cleaned and shall be free frm grease, paint, or other foreign sub- stances, Welding and qualification of welders shall conform to the requirements specified on the applicable drawings, M
40、IL-W-12332, MIL-W- 8611, and MIL-STD-248. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-Lb52A BL W 9779706 0424267 b MIL-T- 18652A (OS) 3.19.1 Butt welding. All steel welds of the butt type shall be completed from the outside of the tanks,
41、and n: backing strip shall be used. but distinct continuous smooth bead or bulge on the inside of the tanks and will fill all crevices completely at the seams. filler metal on the outside shall be clean, free from porosity, smooth, and of neat appearance, After completion of welds, all traces of flu
42、x shall be thoroughly hammered or rolled so that the welds are smooth, Hammering or rolling shall be performed in a manner that will not cause incipient cracking in the welds during this operation, In no case shall a weld be reduced to a thickness less than that of the thinnest member in the joint o
43、r shall rolling or hammering be applied to a defective weld. approved by the Government. Welds shall be preformed in a manner that will give a slight The bead of Other methods of butt Welding may be used if 3.20 Workmanship. Workmanship shall be that required by best commercial practices consistent
44、with quantity production of analogous parts, maintaining the dimensions , finishes , and tolerances specified herein and on the applicable drawings and specifications, All com- ponents shall be sound and free from defects which would deleteriously affect the strength and performance of the tank , an
45、d all joints- and seams shall be tight and sound, All surfaces shall be free from rough spots, sharp edges and burrs, protrusions, dents, or similar defects which might interfere with the assembly of the tank components and loadihg of the tanks, interfere with stacking, cause injury to personnel, or
46、 damage contents during loading, handling, and shipping. The appearance of the tank shall be indicative of first class work- manship. 3.21 Preproduction sample Unless otherwise specified in the contract or order, preproduction samples of the tanks shall be manu- factured using the methods and proced
47、ures proposed for production, The sample shall be tested as specified in section 4 herein for the purpose of determining that, prior to production, the suppliers production methods are capable of yielding items that comply with the technical requirements of this specification and the contract or ord
48、er. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or order, the supplie
49、r may use his own or any other facilities suitable for the performance 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-Lb52A 1 M 777770b 04242b B W MIL-T-18652A (OS) of the inspection requirements specified herein, unless disapproved by the Government, of the inspections set forth in this specification where su tanks. exceed the number intended for use with that tank. Fitt
