1、 Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data that may improve this document should be sent to usarmy.detroit.rdecom.mbx.tardec-standardizationmail.mil or U.S. Army RDECOM, Tank Automotive Research, Development and Engineering Center, ATTN: RDTA-EN/ST
2、ND/TRANS MS #268, 6501 E. 11 Mile Road, Warren, MI 48397-5000. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.dla.mil. AMSC N/A FSC 4720 DISTRIBUTION STATEMENT A. Approved for public release; dis
3、tribution is unlimited. INCH-POUND A-A-52426A (AT) 21 May 2012 SUPERSEDING A-A-52426 (AT) 10 February 1993 COMMERCIAL ITEM DESCRIPTION HOSE AND HOSE ASSEMBLIES, NON-METALLIC, SILICONE, POLYESTER AND WIRE REINFORCED (FOR COOLANT AND HEATING SYSTEMS OF DIESEL AND GASOLINE POWERED ENGINES) The General
4、Services Administration has authorized the use of this commercial item description (CID) as a replacement for MIL-H-62217A(AT), MIL-H-62217/1A(AT), MIL-H-62217/2(AT), MIL-H-62217/3(AT) and MIL-H-62217/4(AT) which are canceled. 1.0 SCOPE. This CID covers polyester and wire reinforced, silicone compou
5、nded, elastomeric hose and hose assemblies, for coolant and heating systems of diesel and gasoline powered engines, with a temperature range from -40 degrees Fahrenheit (F) to +425 F. All hose types are intended for severe service such as on cars, buses, heavy duty military and commercial trucks, mi
6、litary combat vehicles, and off-road earth moving equipment. Type I (1/2 inch inside diameter (ID) thru 1 1/8 inch ID) hose is intended for connecting hot water heaters to coolant circulating systems of ground vehicles. The hose and hose assemblies described in this CID are hereinafter referred to a
7、s “hose”. 2.0 CLASSIFICATION. Hose covered by this specification are classified as follows (see 6.3): Type I - Full tube ID for formed and beaded male tube ends on cooling and heater systems. Type II - Preformed full tube ID for formed and beaded male tube ends in cooling systems. Type III - A flexi
8、ble type with cuff ID and outside diameter (OD) ends for clamping to formed and beaded male tube ends on cooling systems. Type IV - Full tube ID to accommodate reattachable fittings for sealed heater systems. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from I
9、HS-,-,-A-A-52426A 2 3.0 SALIENT CHARACTERISTICS. 3.1 Materials. The use of recovered materials made in compliance with regulatory requirements is acceptable providing that all requirements of this CID are met (see 6.6). 3.1.1 Inner tube. The inner tube shall be a high temperature resistant, silicone
10、 rubber conforming to the physical properties in table I. 3.1.2 Cover. Cover shall consist of a continuous layer of minimum thickness or a thin skin, wrapped layer of polysiloxane compounded elastomeric material conforming to the physical properties in table I. 3.1.3 Reinforcement. 3.1.3.1 Fabric (t
11、ypes I, II and IV). Reinforcement shall consist of multiple plies of woven or knitted fabric of such strength as to meet the requirements of this CID. 3.1.3.2 Wire (type III). Reinforcement shall consist of high carbon steel wire in accordance with SAE J20/2. 3.1.4 End fittings. 3.1.4.1 Preformed cu
12、ff (type III). The preformed cuff (soft end) end fitting shall be of silicone elastomeric plies, or fabric plies impregnated with silicone elastomeric material, with the physical properties in table I. 3.1.4.2 Steel (type IV). Steel end fittings, except stainless, shall be coated with alkaline zinc
13、electroplate per ASTM B633 Class Fe/Zn 25 Type VI, or alkaline zinc nickel electroplate per ASTM B841 Class I Grade 8 with a minimum of 12 mass% nickel. The zinc or zinc nickel plating shall subsequently be coated with MIL-DTL-5541 Type II Class 1A. 3.2 Design and construction. 3.2.1 Type I. Hose ty
14、pe I as shown in figure 1 shall consist of an inner tube, an intermediate fabric reinforcement, and an outer cover or protective skin. 3.2.2 Type II. Hose type II as shown in figure 2 shall consist of an inner tube, an intermediate fabric reinforcement, and an outer cover or protective skin. 3.2.3 T
15、ype III. Hose type III as shown in figure 3 shall consist of an inner tube, a helical wire reinforcement (see 3.1.3.2), and an outer cover, and shall have a preformed cuff (see 3.1.4.1) on each end. Each cuff shall be of uniform thickness. Wire reinforcement shall not be exposed on either the inner
16、or outer diameter of the hose. In addition, a fabric reinforcement may be used over the entire length of the hose. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-52426A 3 3.2.4 Type IV. Hose type IV as shown in figure 4 shall consist of an inner
17、 tube, an intermediate fabric reinforcement and an outer cover or protective skin, with two steel end fittings attached, one male type and one female type. TABLE I. Physical properties requirements. Physical properties Types I, II, IV Type III Inner Tube Cover Inner Tube Cover Original properties Ha
18、rdness, durometer, Shore A 50/70 N/A 55/65 N/A Tensile strength, min, psi 800 800 1000 1000 Elongation, min, percent 200 200 250 250 Oven aging at temperatures noted, F (72 hours) 3505 3505 3505 3505 Changes after 72 hours Hardness, durometer, Shore A -5 to +10 0 to +10 0 to +20 N/A Tensile strength
19、 retained, min, percent 90 90 90 90 Elongation retained, min, percent 65 65 65 65 Oil immersion (change) Volume, max, percent (70 hours at 212 F) 0 to +40 0 to +40 0 to +40 0 to +40 Tensile strength retained, min, percent 60 60 60 60 Hardness, durometer, Shore A, max 0 to -20 0 to -20 0 to -20 0 to
20、-20 Coolant immersion (change) Volume, max, percent (166 hours at 2355 F) 0 to +10 N/A 0 to +10 N/A Hardness, durometer, Shore A 10 N/A 10 N/A Tensile strength retained, min, percent 70 N/A 70 N/A Elongation retained, min, percent 75 N/A 75 N/A Compression set, maximum, percent 35 N/A 35 N/A NOTES:
21、1. “N/A” means “Note Applicable”. 2. “min” means “minimum”. 3. “psi” means “pounds per square inch”. 3.2.4.1 Steel end fittings (type IV). Steel end fittings shall be in accordance with SAE J516 with the flares in table II. The female type shall incorporate a swivel. Fittings may be of the reusable
22、type. 3.2.5 Woven or knitted fabric. Layers of fabric shall be well bonded with elastomeric silicone material which shall firmly join plies to inner tube and cover, and each other. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-52426A 4 FIGURE 1
23、. Type I hose. FIGURE 2. Type II hose. LENGTH (SEE 3.2.7.1) X (SEE TABLE XII) X (SEE TABLE XII) Y (SEE TABLE XIII) W (SEE TABLE XIII) Z (SEE TABLE XIV) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-52426A 5 FIGURE 3. Type III hose. FIGURE 4. Ty
24、pe IV hose. X (SEE TABLE XII) 1.500 .375 BOTH ENDS Y (SEE TABLE XIII) NOTE: ALL DIMENSIONS IN INCHES LENGTH (SEE 2.2.7.2) X (SEE TABLE XII) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-52426A 6 TABLE II. End fitting flares. End fitting flare T
25、ype IV hose ID 45 .5 45 .625 37 .875 37 1.125 3.2.6 Dimensions. 3.2.6.1 Diameter tolerances. Tolerances for hose diameters shall be as shown in tables III, IV and V. TABLE III. Hose diameter tolerances (types I and II). Inside diameter Tolerances From To and including Straight hose Curved hose (inch
26、) (inch) (inch) (inch) 3/8 1/2 1/64 1/32 5/8 4 1/32 1/32 TABLE IV. Hose diameter tolerances (type III). Inside diameter Outside diameter (Hose type F. 3.5 Identification and marking. Types I, II and IV shall be marked on the outer surface. Type III shall be marked on one or both cuffs. All marking s
27、hall include the following information in contrasting color by stencil or printed type: National stock number Nominal size (ID) A-A-52426(AT) Type Manufacturers identification code (CAGE) Month and year of manufacture 1/ 1/ Month and year of manufacture shall be recorded, but shall apply for referen
28、ce purposes only. 3.6 Workmanship. Workmanship shall be such as to produce hose free of looseness of cover, exposed reinforcements (wire, fabric), cuts or bruises, blisters, breaks, pitting, wrinkles in cover, loose foreign matter, excess mandrel lubricants, or any other defects which adversely affe
29、ct hose performance or appearance. 4.0 PRODUCT CONFORMANCE PROVISIONS. 4.1 Responsibility for inspection. The contractor is responsible for the performance of all inspections (examination and tests). 4.2 Contractor certification. The contractor shall certify and maintain substantiating evidence that
30、 the product offered meets the salient characteristics of this CID and that the product conforms to the producers own drawings, specifications, standards, and quality assurance practices. Items with known defects shall not be submitted for Government acceptance. The Government reserves the right to
31、require proof of such conformance prior to the first delivery and thereafter as may be otherwise provided for under the provisions of the contract. 5.0 PACKAGING. Preservation, packing, and marking shall be as specified in the contract or order (see 6.2). 6.0 NOTES. 6.1 Addresses for obtaining copie
32、s of referenced documents (see 6.2). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-52426A 11 6.1.1 Government specifications and standards. Documents are available from the Document Automation and Production Service, Building 4/D, 700 Robbins A
33、venue, Philadelphia, PA 19111-5094 or website: https:/assist.dla.mil/quicksearch/. A-A-52506 - Clamps, Hose A-A-52624 - Antifreeze, Multi Engine Type 6.1.2 Non-Government publications. ASTM International Documents are available from American Society for Testing and Materials, 100 Barr Harbor Drive,
34、West Conshohocken, PA 19428-2959 or http:/www.astm.org/). ASTM B633 - Electrodeposited Coatings of Zinc on Iron and Steel ASTM B841 - Standard Specification for Electrodeposited Coatings for Zinc Nickel Alloy Deposits ASTM D380 - Rubber Hose ASTM D395 - Compression Set of Rubber ASTM D412 - Rubber,
35、Determination of Tension Characteristics ASTM D413 - Rubber Property-Adhesion to Flexible Substrate ASTM D471 - Rubber Property-Effect of Liquids ASTM D573 - Rubber-Deterioration in an Air Oven ASTM D1149 - Rubber Deterioration-Surface Ozone Cracking in a Chamber (Flat Specimen) ASTM D2240 - Indenta
36、tion Hardness of Rubber and Plastics by Means of a Durometer SAE International Documents are available from the Society of Automotive Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096-0001 or website: http:/www.sae.org/.) SAE J516 - Hydraulic Hose Fittings SAE J1508 - Hose Clamps SAE J20
37、/2 - Coolant Hose - Normal Service Type Convoluted, Wire Support Hose Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-52426A 12 6.2 Ordering data. Acquisition documents must specify the following: a. Title, number, and date of this CID. b. If req
38、uired, the specific issue of individual documents referenced (see 6.1). c. Length of type I hose (see 3.2.7.1). d. Length of type IV hose (see 3.2.7.2). e. Selection of applicable level and packaging requirements (see 5.0). f. Part Identification Number (PIN) required (see 6.3) 6.3 Part or identific
39、ation number (PIN). The PIN to be used for hose acquired to this CID is as follows (see 6.2): A 52426 - T X Y Z W Length of bent section (Type II hose, only) (see table XIII) Bend angle (Type II hose, only) (see table XIV) Length (see table XIII) Inside diameter (see table XII) Type (see 2.0): 1 - t
40、ype I 2 - type II 3 - type III 4 - type IV CID number Commercial item designator Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-52426A 13 TABLE XII. Hose inside diameter. A 52426 Dash size (X) Nominal ID (inch) Superseded Dash Size M62217/1 (typ
41、e I) M62217/2 (type II) M62217/3 (type III) M62217/4 (type IV) A 3/8 6 B 1/2 8 10 C 5/8 10 12 D 3/4 12 E 7/8 14 16 F 1 16 G 1-1/8 18 20 H 1-1/4 20 A A J 1-3/8 22 K 1-1/2 24 B B L 1-3/4 28 C C M 2 32 D D N 2-1/4 36 E E P 2-3/8 38 R 2-1/2 40 F F S 2-3/4 44 T 3 48 G G V 3-1/2 56 W 4 64 H H TABLE XIII.
42、Hose length. A 52426 Dash size (Y and W) Length (inch) Superseded Dash Size M62217/2 (type II) M62217/3 (type III) A 5 A R5 B 6 B R6 C 7 C R7 D 8 D R8 E 9 E R9 F 10 F R10 G 11 G R11 H 12 H R12 J 14 J R14 K 16 K R16 L 18 L R18 M 20 M R20 N 22 N R22 Provided by IHSNot for ResaleNo reproduction or netw
43、orking permitted without license from IHS-,-,-A-A-52426A 14 TABLE XIII. Hose length Contunued. A 52426 Dash size (Y and W) Length (inch) Superseded Dash Size M62217/2 (type II) M62217/3 (type III) P 24 P R24 R 26 R R26 S 28 S R28 NOTE See 3.2.7 for length of type I and type IV bulk hose. TABLE XIV.
44、Hose bend angle. A 52426 Dash no. (Z) Bend Angle Superseded M62217/2 (type II) Dash no. A 15 A B 30 B C 45 C D 60 D E 75 E F 90 F 6.4 Supersession data. This CID supersedes MIL-H-62217A(AT), dated 16 January 1981, MIL-H-62217/1A(AT), dated 6 August 1984, MIL-H-62217/2(AT), dated 12 September 1974, a
45、nd MIL-H-62217/4(AT), dated 12 September 1974. 6.5 Cross-reference. Hose conforming to this CID is substitutable/interchangeable with hose conforming to MIL-H-62217A(AT) as shown in table XV with tables XII, XIII and XIV dash numbers/sizes. TABLE XV. Sample PIN cross reference. A 52426 PIN Supersede
46、d PIN A 52426-1D 1/ M62217/1-12 - 36 A 52426-2LABG M62217/2 C A B G A 52426-3LA M62217/3 C R5 A 52426-4C 2/ M62217/4 12 25 NOTE: 1/ See 3.2.7.1 and 6.2 to specify type I bulk hose length. 2/ See 3.2.7.2 and 6.2 to specify type IV hose length. 6.6 Regulatory requirements. The offeror/contractor is en
47、couraged to use recovered materials to the maximum extent practicable, in accordance with paragraph 23.403 of the Federal acquisition Regulation (FAR). The Federal Acquisition Regulation (FAR) may be obtained at the following website: http:/www.acquisition.gov/far/. Provided by IHSNot for ResaleNo r
48、eproduction or networking permitted without license from IHS-,-,-A-A-52426A 15 6.7 Metric products. Products manufactured to metric dimensions will be considered on an equal basis with those manufactured using inch-pound units, provided they fall within specified tolerances using conversion tables contained in the latest revision of IEEE/ASTM-SI10, and all other requirements of this CID are met. If a product is manufactured to metric dimensions and those dimensions exceed the tolerances specified in the inch-pound units, a requ
