1、_ MIL-DTL-2b894D W 99999Ob 20bb03b 332 I INCH-POUND I MIL-DTL-26894D 30 June 1998 SUPERSEDING MI L-H-26894C 13 July 1976 DETAIL SP ECI FI CATION HOSE AND HOSE ASSEMBLY, RUBBER, GASOLINE, REFUELING, LOW TEMPERATURE This specification is approved for use by all Departments and Agencies of the Departme
2、nt of Defense. 1. SCOPE 1.1 Scope. This specification contains the requirements for a low temperature, 4-inch ID gasoline refueling rubber hose and hose assembly. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This s
3、ection does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements documents ci
4、ted in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications and standards. The following specifications and standards form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documen
5、ts are those listed in the issue of the Department of Defense Index of Specifications and Standards (DoDISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS FEDERAL Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in i
6、mproving this document should be addressed to: Commander, Defense Supply Center, Columbus, Code DSCC-VAI, 3990 East Broad Street, Columbus, OH 4321 6-5000, by using the Standardization Document Improvement Proposai (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 4720
7、DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Licensed by Information Handling Services- flIL-DTL-26894D 999990b 20bb037 279 M IL-DTL-26894D QQ-P-416 - Plating, Cadmium (Electrodeposited) TT-T-548 - Toluene; Technical QQ-S-763 - Steel Bars, Wire, Shapes and Forgin
8、gs, Corrosion Resistant DEPARTMENT OF DEFENSE MIL-PRF-5624 MIL-R-6855 - Rubber: Synthetic, Sheets, Strips, Molded or Extruded MIL-A-8625 - Anodic Coatings for Aluminum and Aluminum Alloys MIL-C-11796 - Corrosion Preventive Compound, Petrolatum, Hot Application MIL-A-21180 - Aluminum Alloy Casting, H
9、igh Strength MIL-DTL-31 O00 - Technical Data Packages, General Specification for - Turbine Fuel, Aviation, Grades JP-4, JP-5, and JP-5/JP-8 ST Shapes, General Specification for STANDARD DEPARTMENT OF DEFENSE MI L-STD-831 - Test Reports, Preparation of (Unless otherwise indicated, copies of the above
10、 specifications and standards are available from Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 191 1 1-5094.) 2.3 Non-Government publications. The following documents form a patt of this document to the extent specified herein. Unless otherwise specified, the
11、 issues of the documents which are Department of Defense (DoD) adopted are those listed in the issue of the DoDISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DoDISS are the issues of the documents cited in the solicitation (see 6.2). . AMERICAN N
12、ATIONAL STANDARDS INSTITUTE (ANSI) ANSVASQC-Z1.4 - Sampling Procedures and Tables for Inspection by Attributes (DoD adopted) (Application for copies should be addressed to the American Society for Quality Control, PO Box 3005,611 East Wisconsin Avenue, Milwaukee, WI 53201-4606.) AMERICAN SCIElY FOR
13、TESTING AND MATERIALS (ASTM) ASTM-D380 - Rubber Hose, Standard Test Method for (DoD adopted) ASTM-D412 - Vulcanized Rubber, Thermoplastic Rubbers and Thermoplastic Elastomers - Tension, Standard Test Methods for (DoD adopted) ASTM-A967 - Chemical Passivation Treatments for Stainless Steel Parts, Sta
14、ndard Specification for (DoD adopted) ASTM Manual for Engine Test for Rating Fuels (Application for copies should be addressed to American Society for Testing and Materials, 1 O0 Barr Harbor Drive, West Conshohocken, PA 19428-2959.) 2 Licensed by Information Handling ServicesMIL-DTL-26894D = 9799906
15、 2066038 LO5 MIL-DTL-26894D INTERNATIONAL ORGANIZATION FOR STANDARDIZATION IS04649 - Rubber - Determination of Abrasion Resistance Using a Rotating Cylindrical Drum Device (Request for copies should be addressed to International Organization for Standardization, Case Postale 56, Geneva, Switzerland
16、CH-1211.) SOCIETY OF AUTOMOTIVE ENGINEERS (SAE) AS1 933 - Age Controls for Hose Containing Age-Sensitive Elastomeric Material (DoD adopted) (Application for copies should be addressed to the Society of Automotive Engineers, 400 Commonwealth Drive, Warrendale, PA 15096-6001 .) 2.4 Order of precedence
17、. In the event of a conflict between the text of this document and the references cited herein (except for related associated specifications, specification sheets, or MS standards), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulati
18、ons unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), samples shall be submitted for first article inspection in accordance with 4.2. 3.2 Material. Materials shall be as required in this specification and shall conform to all applicable Gover
19、nment specifications and drawings, except as otherwise specified herein. Materials which are not covered by specifications, or which are not specifically described herein, shall be of the quality appropriate for the purpose intended (see 6.1). 3.2.1 Recvcled. recovered, or environmentallv preferable
20、 materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible provided that the material meets operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.3 Desiqn and construction. Unless otherwise spe
21、cified in the contract or in the purchase order (see 6.2), the hose shall consist of the following components: a. a compounded inner tube (see 3.3.1 -1) b. braided, loomed or plied-type reinforcement (see 3.3.1.2) c. a helix wire (see 3.3.1.3) d. a compounded cover (see 3.3.1.4) 3.3.1 Hose. The hose
22、 shall be no more than eight quarters old from the cure date to the date of delivery to the procuring activity or to the manufacturers of hose couplers and other accessory equipment. The hose assembly installed in equipment shall be no more than sixteen quarters old upon the date of delivery of that
23、 equipment to the procuring activity. The cut hose ends shall be sealed with a sealant or cement. Definitions for “cure date” and “quarter“ can be found in AS1 933. 3 Licensed by Information Handling ServicesM IL-DTL-26894D 3.3.1.1 Tube. The tube shall be made from a synthetic rubber compound resist
24、ant to high aromatic aviation fuel. The thickness of the tube shall be not less than 0.094 inch and its diameter shall be uniform to within a.031 inch. The bore of the tube shall be smooth, free from pitting, cuttings, borings or cements. 3.3.1.2 Reinforcement. The reinforcement shall be evenly and
25、firmly braided, loomed, or plied. It shall be free from defects, dirt, knots, lumps, and irregular twisting. 3.3.1.3 Helix wire. The helix of round wire, made from steel free of corrosion, shall be embedded in synthetic rubber between reinforcing members. The diameter of the wire shall be not less t
26、han 0.078 in. Its tensile strength shall be not less than 180,000 psi. The wire shall extend at least to under the middle coupling strap. 3.3.1.4 Cover. The cover shall be constructed of compounded polychloroprene rubber and shall be abrasion resistant (see 3.4.3). It shall be smooth, free from pitt
27、ing, and shall have a uniform thickness of not less than 0.063 inch. 3.3.2 Couplinas. Unless otherwise specified, couplings shall not be provided. When couplings are required, they shall be non-reattachable, threaded (see 3.3.2.2) and of the male or female type as specified by the procuring activity
28、 (see 6.2). The bore shall be smooth. The female coupling nut shall swivel freely by hand. An appropriate gasket shall be used to ensure that the nut is leaktight. The shank of the body shall have a rounded outer edge to prevent cutting of the hose during installation or from sharp bending during us
29、age. The body shall be securely attached to the hose. There shall be no protruding clamps or fasteners. If a sleeve is used, the sleeve shall extend beyond the end of the body when installed; If straps are used, the body shank shall have a length of not less than 5 inches, and the number of barbs se
30、parated by a strap shall be not less than two. 3.3.2.1 CouDlinci chemical composition. If supplied, the body, nut and sleeve shall be a 300 series stainless steel conforming to QQ-S-763, passivated in accordance with ASTM- A967, or high grade brass whose composition shall contain no less than 58 per
31、cent copper. MIL-A-8625 anodized high tensile strength aluminum, type 354 casting alloy conforming to MIL-A-21180 or aluminum alloy wrought of other than the 2000, 4000 and 7000 series may also be used. If used, the grip wire shall be corrosion resistant steel or carbon steel. Grip wire of carbon st
32、eel shall be protected against corrosion by either cadmium plating in accordance with QQ-P-416, type II, class 2 or by any other equivalent method that meets the corrosion resistance requirement of QQ-P-416. If straps are utilized, they shall be of a 300 series stainless steel conforming to QQ-S-763
33、, passivated in accordance with ASTM-A967. If gaskets are provided, they shall be of rubber conforming to MIL-R-6855. 3.3.2.2 CouDlinn threads. Both the male and female type couplings shall be threaded with 4-inch American National pipe threads. 3.3.2.3 CouDlina catxi. Each coupling shall be provide
34、d with a protective closed-end, reusable, threaded, metal cap. The thickness of the cap shall be not greater than 0.031 inch and not less than 0.025 inch. The cap shall not be chemically affected by the corrosion- preventive compound conforming to class 1 of MIL-C-11796. 3.4 Performance. 4 Licensed
35、by Information Handling ServicesMIL-DTL-2b874D m 0b 20bb040 b3 m MIL-DTL-26894D 3.4.1 Lenath chanqe. The length of the hose shall not change more than 7 percent when subjected to the applicable tests specified in 4.4. 3.4.2 Adhesion between tube and adiacent parts. When tested in accordance with 4.4
36、.3, the rate of separation between tube and plies, between plies, and between cover and plies shall be not greater than 1 in/min when tested under a load of not less than 5 Ib/in. 3.4.3 Abrasion resistance of the cover. When subjected to testing in accordance with 4.4.4, the volume of material abrad
37、ed from the cover shall be not greater than 160 mm3. 3.4.4 Burst resistance. The hose shall not burst or develop a permanent blister when tested in accordance with 4.4.5. 3.4.5 Low temperature flexibility. When tested in accordance with 4.4.6, the force required to open the concave hose to approxima
38、tely 90“ angle shall be not greater than 125 Ib. 3.4.6 Low temperature bend. Samples of both the tube and cover shall not crack tested in accordance with 4.4.7. 3.4.7 Volume increase. When tested in accordance with 4.4.8, the volume increase of the tube and cover shall be not greater than 30 and 60
39、percent, respectively. 3.4.8 Tensile strenqth. When tested in accordance with 4.4.9, the tensile strength of the tube and cover shall be not less than 600 and 400 psi, respectively. 3.4.9 Ultimate elonqation. When tested in accordance with 4.4.9, the ultimate elongation of the tube and cover before
40、immersion shall be not less than 200 percent. After immersion, the ultimate elongation of the tube and cover shall be not less than 100 percent. 3.4.10 Pull resistance. When tested in accordance with 4.4.10, the distance between the white marking and the adjacent coupling shall be not greater than 0
41、.062 inch. The hose assembly shall neither break nor shall its couplings disconnect from the hose. 3.4.11 Crush resistance. After being subjected to testing in accordance with 4.4.11, the OD of the hose shall be not less than 95 percent of its original size. 3.4.12 Proof pressure. When tested in acc
42、ordance with 4.4.12, the hose shall not crack, leak or malfunction in any way, 3.4.13 Surqe pressure cvcling. The hose assembly shall not leak or burst during or at the completion of 500 cycles of surge pressure when tested in accordance with 4.4.13. 3.5 Interchanqeability. All hose bearing the same
43、 manufacturers patt number shall be functionally and dimensionally interchangeable. MIL-DTL-31 O00 shall govern the designation of manufacturers parf numbers and changes thereto. 3.6 Dimensions. 3.6.1 Diameter. The hose assembly shall have an inside diameter of 4 kO.031 inch and an outside diameter
44、of 4.875 kO.063 inch. 5 Licensed by Information Handling ServicesM IL-DTL-26894D 3.6.2 Lenqth. The length of the hose shall be as specified by the procuring activity (see 6.2) with a tolerance of I1 percent. Length measurement shall not include the couplings. 3.7 Weight. The weight of the hose shall
45、 be not greater than 4 Ib/ft. 3.8 Identification of oroduct. The hose shall be legibly marked along its longitudinal axis with a fuel-resistant yellow stripe. The stripe shall be broken at approximately 2-inch intervals. 3.8.1 Labeling. A label, vulcanized and inlaid approximately in the center on e
46、ach length of hose, shall contain the following information: MIL-DTL-26894D Date of Manufacture (quarter and year) Contract or Order No. Manufacturers Name or Trademark 3.9 Workmanshio. The hose assembly shall be uniform in quality and shall be free from irregularities, defects, or foreign matter wh
47、ich may adversely affect the service performance. 4. VERIFICATION 4.1 Classification of inspection. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.2) b. Conformance inspection (see 4.3). 4.2 First article inspection. When specified (see 6.2
48、), samples that are representative of the production item shall be submitted to the Government after award of a contract for first article inspection. First article inspection consists of performing all examinations and tests required in this specification on samples submitted by the manufacturer to
49、 determine whether the production item meets the requirements of this specification. 4.2.1 Samples. Unless otherwise specified, the following samples shall be subjected for first article inspection as specified in 4.2.2. The samples shall be representative of the construction, workmanship, components and materials to be used during production. Samples subjected to destructive testing shall not be submitted as part of the contract or order. a. a 10-foot length of uncoupled hose b. a %foot length of hose with couplings and caps attached c. a 15-inch length of hose with
