1、MILITARY SPECIFICATION (See 6.5) JpAa5- HOSE ASSEMBLIES, SYNTHETIC RUBBER, NONCOLLAPSIBLE, FIRE FIGHTIKG This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. c 1. Scope
2、1.1 Scope. This specification covers a heat resistant noncollapsible synthetic rubber hose assembly for une on fire fighting hose reels in rhipboard machinery and auxiliary spaces. types and sizes (for type B) as specified (see 6.2.1). 1.2 Classification. Hose covered by this specification rhall be
3、one of the following Type A - Dual hose assembly consisting of one length of 1-1/2-inch hose and o:. length of 3/4-inch hose banded together with nylon straps. Type B - Single hose assembly of either: Size 1-1/2 Size 3/4 2. APPLICABLE DOCUMENTS 2.1 Issue of documents. The following documents, of the
4、 issue in effect or. date of invitation for bids or request for proposal, form a part of this Specification to the extent specified herein. SPECIFICATIONS FEDERAL W-C-624 - Coupling Assembly, Hose (Garden, Water and Water Suction). MIL-P-775 - Packaging of Hose, Hose Assemblies, Rubber, Plastic, Fab
5、ric, or Metal (including tubing), and Fittings, Nozzles and Strainers. MIL-S-23190 - Straps, Clamps and Mounting Hardware, Plastic for Catie MILITARY Harness Tying and Support. STANDARDS FEDERAL FED-STD-162 - HoBe, Rubber, Visual Inspection Guide For. MIL-STD-105 - Sampling Procedures and Tables For
6、 Inspection by Attributes. in connection with specific acquisition functions should be obtaineo from the contracting activity or as directed by the contracting officer,) the extentxi- Unless otherwise indicated, the issue in effect on date of invitation or bids or request for proposal shall apply. M
7、ILITARY (Copies of specifications, standards, drawings, and publications required Ly contractors 2.2 Other ublications. The foilowing documents form a part of this specification to Beneficial comments (recommendations, additions, deletions) and any pertihezt data which may be of use in improving thi
8、s document should be addressed to: Commander, Naval Ship Engineering Center, SEC 6124, Department of the Navy, Washington, DC 20362 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. -. , THIS DOCUMENT CONTAINS
9、 b PAGES. f. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-24580 (SH) Proof Pressure, minimum ( lb/in2 , gage) 700 700 MIL-H-24580 42 m 7977906 0232937 I m Burst Pressure minimum 2 (lb/in , gage) 1400 1400 AMERICAN SOCIETY FOR TESTING AND MAT
10、ERIALS (ASTM) ASTM D412 - Tension Testing of Rubber, Method of. (Applications for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) 3. REQUIREMENTS (Inches) 3/4 1-1/2 3.1 Material. - (lb/in2 , gage) 350 350 3.1.1 Hose. The tube a
11、nd cover shall be made of ethylene propylene rubber (EPDM) compound. Theompounds shall be resistant to high ambient temperature conditions. 3.1.2 Couplings. End couplings shall be in accordance with Type B, Style 1 of WW-C- 3.1.3 Reinforcement fiber. The reinforcement fibers shall be a synthetic, ma
12、n made 624. fiber of either polyester or aramid fibers. 3.1.4 Recovered materials. Unless otherwise specified herein, all equipment, material, and articles incorporated in the products covered by this specification shall be new and shall be fabricated using materials produced from recovered material
13、s to the maximum extent practicable without jeopardizing the intended use. Recovered materials shall meet all the requirements of the material specifications specified herein. The term “recovered materials“ means materials which have been collected or recovered from solid waste and reprocessed to be
14、come a source of raw materials, as opposed to virgin raw materials. None of the above shall be interpreted to mean that the use of used or rebuilt products is allowed under this- specification unless otherwise specifically specified. 3.1.4.1 Nonmetallic items of the hose assemblies shall be construc
15、ted of virgin material only. 3.2 Construction. The hose construction shall consist of an extruded tube of EPDM rubber compound reinforced by two layers of synthetic polyester or aramid fibers braided in such a way to meet the elongation and other requirements of this specification and shall be cover
16、ed with an extruded cover of EPDM compounded rubber. The outer cover of the 3/4-inch size hose shall be pinpricked. SO-foot length ofl-l/l-inch hose andone 50-foot length of 3J4-inch hose. be banded together with self-clinching straps in accordance with type I of MIL-S-23190. The straps shall be 1 f
17、oot apart, plus or minus 1 inch, starting 1-1/2 feet from the male hose ends, which shall be at one end of the banded pair of hoses. either l-l/i-inch-hose or 3mnch hosey(see 6.2.1). otherwise specified (see 6.2.1). 3.2.1 A, dual hose assembl . The type A dual hose assembly shall consist of one The
18、hoses shall 3.2.2 -BI single hose assembl . The type B single hose assembly shall consist of The length shall be SO feet, unless 3.3 Physical and mechanical properties. 3.3.1 Oven asinq. The hose assembly shall exhibit no evidence of ply separation, blistering, cracking, or hardening when subjected
19、to the test of 4.5.2. 3.3.2 Pressure. 3.3.2.1 Proof. The hose assembly shall meet the applicable proof pressure of table I and shall exhibit no evidence of ply separation, coupling slippage, leakage or rupture when subjected to the test of 4.5.3. TABLE I. Pressur + Working Pressure, minimum I Hose S
20、ize I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-24580 (SH) 3.3.2.2 Burst. The hose assembly shall not leak or burst at a burst pressure less 3.3.3 Elongation and twist. han that swified in table I when subjected to the test of 4.5.5. The
21、hose assembly shall not exhibit any change in length in excess Of minus O percent or plus 6 percent, there shall not be a twist of more than 1/2 degree per foot, and shall meet the working pressure specified in table I when subjected to the test of 4.5.4. 3.3.4 Bend radius. The hose assembly shall n
22、ot collapse or exhibit any kinking (eharp bend) when wrapped on a mandrel having a 7.5-inch radius (see 4.5.6). 3.3.5 Tube and cover tensile strenqth. 1000 lb/in2, gage minimum. minimum when subjected to the test of 4.5.7. 3.3.6 Tube and cover elon ation. minimum and Gc=rzg:h shall be marked on the
23、sample hose and the length gage pressure and again at the working pressure specified in table I 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-24580 (SH) 4.5.5 Burst. Hose samples ohall be subjected to the burst pressure specified in table I
24、. 10,000 lb/in2, gage per minute until failure occurs. occurs shall be recorded. radius and shm meet the requirements of 3.3.4. shall be determined in accordance with publication ASTM D412, Method A, using specimens cut with Die C. 4.5.8 Tube and cover elongation, The elongation of the tube and cove
25、r shall be determined in accordance with publication ASTM D412. Method A, using specimens cut with Die C. 4.6 Ins ection of re aration for deliver . Sample packages and packs and the inspection ofthe presertat!on-packaGg, packing and marking for shipment and storage shall be in accordance with the r
26、equirements of Section 5 and the document specified therein. The pressure shall be increased at a rate not less than 1000 lb/in2, gage nor more than The pressure at which the failure 4.5.6 Bend radius. 4.5.7 Tube and cover tensile strength. The tensile strengths of the tube and cover Hose samples sh
27、all be wrapped on a mandrel having a 7.5 inch 5. PREPARATION FOR DELIVERY (The preparation for delivery requirements specified herein apply only for direct Government acquisitions. requirements of referenced documents listed in section 2, see 6.4.) For the extent of applicabiliv: of the preparation
28、for delivery 5.1 Preservation-packagin , ackin and markin . Hose, hose assemblies and couplings shall be Preserved-Dackaaed lev51 or C? Packed ievzl A. B or C as mecified (see 6.2.1) - - -. - - - - . and marked in accordance-with MIL-P-775. Markings shall. include date- of manufacture (see 3.4). Add
29、itionally, when option (a) under hose assemblies of MIL-P-775 is selected, the hose shall be initially wrapped with an opaque material or the bag material shall be opaque to provide additional environmental protection. 5.2 Cushioning, filler, dunnage and wrapping materials. 5.2.1 Level A reservation
30、- acka in and levels A and B ackin . Use of all types of loose-fill materiarsfor packaging andpazkkrng applications sugh as %shioning, filler or dunnage is prohibited for-materials destined for shipboard installation or stowage. 5.2.2 Level C preservation- ackaging and packinq. When loose fill type
31、materials are used for packaging and packing apFlications such as cushioning, filler and dunnage, all containers (unit, intermediate and shipping) shall be marked or labelled with the following information: “CAUT I ON Contents cushioned etc., with loose-fill material. Not to be taken aboard ship. Re
32、move and discard loose-fill material. If required, recushion with cellulosic material, bound fiber, fiberboard or transparent flexible cellular material.“ 5.2.3 Cushioning, filler, dunnage and wrapping materials selected, whenever available, shall exhibit improved performance for resistance to fire.
33、 6. Notes. 6.1 Intended E. The hose assemblies covered by this specification are intended for use with aqueous film forming foam conforming to MIL-F-24385, fresh water, or potassium dry chemical conforming to 0-D-1407. The hose assemblies are intended to be mounted on hose reels conforming to MIL-R-
34、24414. 6.2 Ordering data. 6.2.1 Acquisition requirements. Acquisition documents should specify the foilowing: (a) Title, number and date of this specification. (b) Type, size (of type B), and number of hose assemblies required (see 1.2). 5 Provided by IHSNot for ResaleNo reproduction or networking p
35、ermitted without license from IHS-,-,-MIL-H-24580 42 m 9999906 0232921 3 m 2 - MIL-11-24580 (SH) (c) Length of type B hose if other than 50 feet (see 3.2.2). (d) Preservation, packaging and packing and marking if other than as specified f in Section 5. 6.2.2 Data requirements. When this specificatio
36、n is used in a contract which invokes the provision of the “Requirements for Data” of the Defense Acquisition Regulation (DAK), the data identified below, which are required to be developed by the contractor, as specified on an approved Data Item Description (DD Form 1664), and which are required to
37、 be delivered to the Government, should be selected and specified on the approved Contract Data Require- ment List (DD Form 142:) and incorporated in the contract. “Requirements for Data developed by the contractor and required to be delivered to the Government should be selected from the list below
38、 and specified in the contract. When the provisions of the of the DAR are not invoked in a contract, the data required to be Paragraph 4.1.1 4.1.2 4.1.3 Data requirements Applicable DID Inspection system DI-T-23741 Material certification DI-T-23741 First article and quality conformance inspection re
39、ports UDI-T-23473 (Copies of data item descriptions required by the contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer. for bids or request for proposal shall apply.) 6.2.2.1 The data requirements o
40、f 6.2.2 and any task in section 3, 4, or 5 of this specification required to be performed to meet a data requirement may be waived by the contracting/acquisition activity upon certification by the offeror that identical data were submitted by the offeror and accepted by the Government under a previo
41、us contract for identical item acquired to this Specification. may be required for each contract regardless of whether an identical item has been supplied previously (for example, test reports). 6.3 First article ins ection. reserves t-gmaivethe requirement for samples for first article inspection a
42、s to those bidders offering a product which has been previously acquired or tested by the Government, and that bidders offering such products, who wish to rely on such production or test, must furnish evidence with the bid that prior Government approval is presently appropriate for the pending contr
43、act. The preparation for delivery requirements Of referenced documents listed in section 2 do not apply when material and parts are acquired by the contractor for incorporation into the equipment and lose their separate identity when the equipment is shipped. Unless otherwise indicated, the issue in
44、 effect on date of invitation This does not apply to specific data which Invitations for bids should provide that the Governmen( 6.4 Sub-contracted material a& parts. 6.5 Su ersession W. This specification supersedes the hose requirements of MIL- R-24414A (Cdated 20 June 1972. Preparing activity: Navy - SH (Project 4210-Nl41) Q V.S. GOVERNMENT PRINTING OFFICE: 1978-603-O22:4Wl 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
