1、MIL-E-24759 42 I 999990b Ol5bb3 O I MIL-E-24759 (SH) 5 August 1991 MILITARY SPECIFICATION EDUCTOR ASSEMBLY, IN-LINE, 90 GALLONS PER MINUTE, PORTABLE AQUEOUS FILM-FORMING FOAM (AFFF) LIQUID CONCENTRATE This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, an
2、d is available for use by all Departments and Agencies of the Department ? F of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements for 90 gallons per minute (gal/min) , 1-1/2-inch portable in-line eductors used with Aqueous Film-Forming Foam (AFFF) liquid concentrate for fire fi
3、ghting. 2. APPLICABLE DOCUMENTS e 2.1 Government documents. .2.1.1 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 documents are those listed in the Department of Def
4、ense Index of Specifications-and Standards (DODISS) and supplement thereto, cited in the solicitation. - Beneficial comnents trecmndations, additions, deletions) and any pertinent data which may be of use in improving this docmnt should be addressed to: Systems Comnand, SEA 5523, Department of the N
5、avy, Uachington, DC 20362-5101 by using the self - addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this docunent or by letter. Cmnder, Naval Sea I 1 FSC 4210. AMSC N/A DISTRIBUTION STATEMENT A. distribution is unlimited. Approved for public release i Pr
6、ovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-24759 (SH) SPECIFICATIONS FEDERAL . WW-C-621 Coupling Assembly, Hose (Fire Woven-Jacketed, Rubber or Fabric- Lined and Unlined. Boxes, Wood, Cleated-Plywood. Boxes, Wood, Nailed and Lock Corner. PPP
7、-B-6 O 1 PPP-B-621 PPP-B-63 6 PPP-B- 6 4 O Boxes, Shipping, Fiberboard Boxes, fiberboard, Corrugated, Triple wall Fiberboard, Corrugated and Solid Cut Shapes. i Sheet Stock (Container Grade), and P PPP-F-32 O i MILITARY MIL-P- 11 6 MIL-G-1149 Preservation, Method of Gasket Materials, Synthetic Rubbe
8、r, 50 and 65 Durometer Hardness Fire Extinguishing Agent, Type 6, Aqueous Film-Forming Foam (AFFF) MIL-F-24385 Liquid Concentrate, for Fresh and Sea Water MIL-N-24408 Nozzles, Fire Hose, Combination Aqueous Film Forming Foam, Water Spray, Adjustable Pattern (Shipboard Use) Rubber, Fluorocarbon elast
9、omer, High Temperature Fluid and Compression Set Resistant Lumber and Plywood fire-retardant Treated Bronze, Nickel-Aluminum. (UNS no.C95800) Castings For Seawater Service. MIL-R-83248 MIL-L- 19 14 O MIL-B-24 48 O STANDARDS FEDERAL FED-STD-H28 Screw Thread Standards for Federal Services 2 Provided b
10、y IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- I , MIL-E-24759 42 rS 999990b 0485665 4 = - -J d MIL-E-24759 (SH) FED-STD-151 - Metals, Test Methods MILITARY MIL-STD-1520 - Corrective Action and Disposition MIL-STD-129 - Marking for Shipment and Storage Syste
11、m for Non-Conforming Material (Unless otherwise indicated, copies of the federal and military specifications, standards and handbooks are available from the Standardization Documents Order Desk, Building 4D, 700 Robbins -t Avenue, Philadelphia, PA 19111-5094). i 2.1.2 Other Government drawincrs. The
12、 following other Government drawings form a part of this document to the extent specified herein. Unless otherwise specified, the issues are-those in effect on the date of the solicitation. DRAWINGS Naval Sea Systems Command (NAVSEA) 810-4444647 Wrench, Spanner a (Application for copies should be ad
13、dressed to: Commander, Portsmouth Naval Shipyard, Code 202.2, Portsmouth, NH 03801.) 2.2 Non-Government aublications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DOD adopted are those listed in
14、 the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed inthe DODISS are the issues of the documents cited in the solicitation (see 6.2) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) A 313 - Standard Specification for Chromium- Nickel St
15、ainless and Heat-Resisting Steel Spring Wire (DOD adopted) A 580 - Standard Specification for Stainless and Heat resisting Steel Wire (DOD adopted) 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-E-24759 42 999990b 0485666 b MIL-E-24759 (SH) B
16、 16 - Standard Specification for Free-cutting Brass Rod, Bar and Shapes for Use in Screw Machines (DOD adopted) B 62 - Standard Specification for Composition Bronze B 148 - Standard Specification for Aluminum- Bronze Sand Castings or Ounce Metal Castings (DOD adopted) B 150 - Standard Specification
17、for Aluminum Bronze, Rod, Bar, and Shapes D 1248 - Standard Specification for Polyethylene Molding and Extrusion Materials D 3951 - Standard Specification forCommercia1 Packaging (Applications for copies should be addressed to American Society for Testing and Materials, 1916 Race Street, Philadelphi
18、a, PA 19103. ) (Non-government standards and other publications are normally available from the organizations that prepare or distribute the documents. These documents also may be available in or through libraries or other informational services.) 2.3 Order of precedence. In the event of a conflict
19、between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.4), a s
20、ample shall be subjected to first article inspection (see 6.4) in accordance with 4.5. 9 e 4. P 4 I 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.2 Materials. The materials for each part shall be made as specified herein. Material not definitel
21、y specified shall be of the best commercial grade and suitable for the purpose intended. Material shall be selected to reduce erosion, corrosion and prevent galling, seizing, or abnormally excessive wear of component parts. Materials, gaskets, and seals in contact with AFFF shall be compatible with
22、the fluid. Acceptance or approval of any constituent material shall not be construed as a guaranty of the acceptance of the finished product. 3.2.1 Recovered materials. Unless otherwise specified herein, all equipment, material, and articles incorporated in the products covered by this specification
23、 shall be new and may be fabricated using materials produced from recovered materials to the maximum extent practicable without jeopardizing the intended use. The term “recovered materialsg1 means materials which have been collected or recovered from solid waste and reprocessed to become a source of
24、 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 3.3 CONSTRUCTION 3.3.1 Description. The in-line eductor (see Figure 1) shall educt AFFF concentrate (MIL-F-24385 Type 6) as
25、specified, when operating with fresh or seawater at rated inlet pressure and flow (See 6.3 and appendix). The eductor shall contain no moving parts except for a ball check in the AFFF inlet and a swivel hose connection, The entire eductor assembly shall not exceed 10 inches in length. The eductor sh
26、all consist of the following components: (a) Eductor body (diffuser) (b) Nozzle (c) AFFF ball check body (d) AFFF ball check (e) AFFF suction hose (f) AFFF suction strainer assembly (9) Hose retaining clamp (1) Suction strainer screen (2) Suction strainer housing (wand) (h) Water inlet coupling (i)
27、Removable concentrate orifice 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-24757 42 W 79799Ob 045bb T m l MIL-E-24759 (SH) I 3.3.2 Eductor body. The body shall contain the nozzle, throat, diffuser, and AFFF concentrate orifice. The nozzle
28、shall allow water into the throat at a rate of 84 gal/min minute at 200 pounds per square inch (lb/in2). The throat shall accommodate the mixing of the AFFF concentrate with the water. shall provide a outlet at 90 gallons per minute. The AFFF concentrate orifice shall induct AFFF concentrate at the
29、prescribed mix concentration when the eductor is flowing water at the rated pressure and flow. The eductor body shall be cast brass in accordance with alloy no. 836 of ASTM B 62. The diffuser transition from the throat and discharge to the 3.3.3 Nozzle section. minimum of 84 gallons per minute at th
30、e rated pressure. nozzle shall be Alpha Nickel Aluminum Bronze in accordance with alloy no. 958 of ASTM B 148 or MIL-B-24480. 3.3.4 AFFF ball check. A ball check shall be incorporated into the AFFF suction side of the eductor to prevent water from flowing to the AFFF source. The ball check body shal
31、l be removable from the body of the eductor for inspection and maintenance of the ball check. The ball check shall be made of a low density polyethylene material in accordance with Type I, Class “All of ASTM D 1248. The nozzle shall be able to pass a The 3.3.5 AFFF concentrate orifice. The AFFF suct
32、ion orifice shall induct AFFF concentrate at a 6 percent volumetric ratio, when the eductor is flowing at rated pressure and flow. The orifice shall be Alpha Nickel Aluminum Bronze in accordance with alloy no. 958 of ASTM B-148 or Alloy 544 of ASTM B-139. The orifice shall be stamped or engraved Il6
33、 percent“. The orifice shall be removable. A retainer (for example, snap ring, made of corrosion resistant material) shall hold the orifice securely in place. 3.3.6 AFFF Suction Hose and Wand Assembly. The suction tube (see figure 1) shall consist of a spiral reinforced clear polyvinyl chloride hose
34、 42 inches in length. It shall terminate at one end with a rigid brass tube, 18 inches in length, for insertion into an AFFF foam container. have a connection for attachment to the eductor body. material of the connection shall be free cutting brass in The opposite end shall The 6 Provided by IHSNot
35、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-l I I I I I I I I I l I l I I l l l 1 I I l MIL-E-24759 (SH) accordance with ASTM B 16. A removable strainer shall be attached to the AFFF concentrate inlet end of the brass wand. The strainer shall be 300 series stainle
36、ss steel in accordance with ASTM A 313 or ASTM 580. The suction end of the wand shall be castellated and shall provide for continuous flow of AFFF concentrate when the wand is held against the bottom of the container. 3.3.7 Connections. The fluid inlet hose connection shall be a female coupling, 1-1
37、/2 inch diameter, 11-1/2 threads per inch NPSH swivel type with ball bearing movement. Two lugs shall be provided on the inlet coupling, spaced 180 degrees apart in accordance with style I of WW-C-621. The lugs shall be compatible with spanner wrenches conforming to drawing, 810-4444647. All threade
38、d connections shall be in accordance with FED-STD H28. The diffuser outlet shall be 1-1/2 inch diameter, 11-1/2 NPSH threaded male end. eductor body of sufficient thickness and circumference to adequately protect the diffuser outlet threads from damage while eductor and fire hose are separated (see
39、figure 1). The AFFF suction hose connection shall be in a perpendicular plane to the centerline of the eductor body 3.3.8 O-rinqs and saskets. Gasket and gasket recess dimensions shall be in accordance with WW-C-621, The gasket shall be fabricated from rubber conforming to Shore A 60 to 75 durometer
40、, of Type II, Class 5 of Mil-G-1149. O-ring seals shall conform to MIL-R-83248 Class 1. 3.4 Markins for identification. Each eductor shall have the following data stamped, engraved or cast on the body: A ring shall be integrally cast with the (a) Manufacturers name (b) Rated capacity in gal/min (c)
41、N.avy Stock Number (NSN) of the assembly 3.5 Special tools. No special tools shall be required nor supplied for maintenance of equipment covered by this specification. Special tools are defined as those tools which are not listed in the Federal Supply Catalog.(Copies of this catalog may be consulted
42、 in the office of the Defense Contract Administration Services Management Area (DCASMA) or at any Federal Government Agencies Procurement Office.) 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-24757 42 7999906 0485670 8 MIL-E-24759 (SH) 3.6
43、 Workmanship. Components shall be free from defects which affect their appearance or operation. sound, and free from blow holes, hard spots, porosity, cracks, and related defects. The eductor shall have smooth and clean surfaces, inside and outside; all roughness shall be removed. Castings shall not
44、 be plugged or repaired. Industry standards for metallic sealing is acceptable. Castings shall be clean, 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified, the contractor is responsible for the performance of all inspection requirements (examinations and t
45、ests) as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to
46、perform any of the inspections set forth in this document where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. 4.1.1 Responsibility for compliance. All items shall meet all requirements of this sections 3 and 5. The inspections set forth in
47、this specification shall become a part of the contractors overall inspection system or quality program. The absence of any inspection requirements in this specification shall not relieve the contractor of the responsibility of ensuring that all products or supplies submitted to the Government for ac
48、ceptance comply with all requirements of the contract. inspection, as part of the manufacture operations, is an acceptable practice to ascertain conformance to requirements, however, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the Go
49、vernment to accept defective material. , Sampling 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: (a) Material inspection (see 4.3) (b) Quality conformance inspection (see 4.4) (c) First article inspection (see 4.5) a P Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-m- MIL-E-24757 42 79777
