ARMY A-A-52426 A-2012 HOSE AND HOSE ASSEMBLIES NON-METALLIC SILICONE POLYESTER AND WIRE REINFORCED (FOR COOLANT AND HEATING SYSTEMS OF DIESEL AND GASOLINE POWERED ENGINES).pdf
《ARMY A-A-52426 A-2012 HOSE AND HOSE ASSEMBLIES NON-METALLIC SILICONE POLYESTER AND WIRE REINFORCED (FOR COOLANT AND HEATING SYSTEMS OF DIESEL AND GASOLINE POWERED ENGINES).pdf》由会员分享,可在线阅读,更多相关《ARMY A-A-52426 A-2012 HOSE AND HOSE ASSEMBLIES NON-METALLIC SILICONE POLYESTER AND WIRE REINFORCED (FOR COOLANT AND HEATING SYSTEMS OF DIESEL AND GASOLINE POWERED ENGINES).pdf(15页珍藏版)》请在麦多课文档分享上搜索。
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
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