1、MIL-N-122F 42 i 7777906 0232011 8 Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: 3% Army Mobility Equipment Research and Development Command, Am: DRDME-DS, Fort Belvoir, VA 22060 by using the s
2、elf- addressed Standardization Document Improvement Proposal (DD Form 1426) ,appearing at the end of this document or by letter. .r i.,. -.: . . - Ml.!L-N-12279F . . . . : ;.j-24 September 1979 r . . . I iSUPERSEDING - : -r. 1 .MIL-N-l2279E _. . . : : . . .22 August 1975 . . . . . . ,:.,- - -. . . -
3、 . MILITARY SPECIFICATION :. - i. . . , . NOZZLES, FIRE HOSE, FOAM . -. This specification is approved for use by all Departments .and Agencies of the Department of Defense. _. - 1. SCOPE 1.1 Scope. This specification covers air-foam-producing nozzles for general application in fire fighting. 1.2 Cl
4、assification. The nozzles shall be of the following types, classes, and internal thread sizes for connection to fire hose, as specified (see 6.2): . Type I - Stream, air-aspirating, with pickup tube . . Class B - Without pack I* Size - l-l/a-inch, 30 to 40 gallons per minute (gpm) (100 pounds per sq
5、uare inch gage (psig) Size - 1-1/2-inch, 60 gpm (100 psig) Class C - Flexible tube applicator, 1-1/2-inch, 60 gpm (100 Psig) * . -. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-N-12277F 42 W 7799706 0232012 T W - Type II - Stream, aieaspiratin
6、g, without pickup tube Sire - l-1/2-incb, 30 to 40 gpm (100 psig) Sire - 2-i/2-nchD 120 gpm (100 psig) lixe - 2-1/2-%nCh, 250 gpm (100 psig) Gtrc - 3-1/2-inch, 500 gpm (100 psig) . # Rubber, Plastic, Fabric, or Metal (Including Tubing) ; and Fittings , Nozzles, and Strainers. - Environmental Testing
7、, Aeronautical and Associated Equipment, General Specification for. Specification for. Alloys, Nickel Alloys, Aluminum and Aluminum Alloys. - Rubber Sheet: Synthetic, Medium Soft, General-Purpose Gasket Material (for Extreme Climatic Conditions) . and Marking, Blank. - Soldering Process , General -
8、Brazing of Steels, Copper, Copper . - Screw-Thread Standards for Federal Services - Sampling Procedures and Tables for inspection by attributes. - Identification Marking of US Military Property. - Comercial Packaging of Supplies and Equipmento (Copies of specifications and standards required by cont
9、ractors in con- nection with specific procurement functions should be obtained fromthe procuring activity or as directed by the contracting officer.) 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - MIL-N-12279F 42 H 9977906 O232014 3 = MIL-N-122
10、79F . 2.2 Other publications. The following documents form a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply. AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME) Boiler and Prkds
11、ure Vessel Code, Section IX, Welding Qualifications. (Application for copies should be addressed to the American Societ of Mechanical Engineers, 345 East 47th Street, New York, NY 10017.r AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) A 47 A 513 B 16 B 26 B 117 B 124 B 584 - Malleable Iron Castin
12、gs, - Electric-Resistance-Welded Carbon and Alloy Steel - Free-Cutting Brass Rod, Bar, and Shapes for Use in . Screw Machines. - Aiuminum-ktloy Sand Castings. - Salt Spray (Fog) Testing. - Copper and Copper Alloy Forging Rod, Bar and Shapes. - Copper Alloy Sand Castings for General Applications. Mec
13、hanical Tubing. (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Phialdelphia, PA 19103.) AMERICAN WELDING SOCIETY, INC, (AWS) D1.- - Structural Welding Code. (Application for copies should be addressed to the American Welding Society,
14、2501, NW 7th Street, Miami, FL 33125). NATIONAL FI;RE PROTECTION ASSOCIATION (WFPA) National Fire Code, Volume 1, No. 11, Foam Extinguishing Systems. (Application for copies should be addressed to the National Fire Protection Association, 60 Batterymarch Street, Boston, MA 02110.) 4 . Provided by IH
15、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-L 3- - MIL-N-12279F LI2 M 7777706 0232035 5 / i MIbN- 12 2 7 9F 3. REQUIREMENTS 3.1 Descri tion The nozzles shall be capable of producing air-foam at the _ce_r no na capacities specified herein from foam-forming liqu
16、id conforming to 0-F-555. 3.2 First article (preproduction mudel) The contractor shall furnish one or more nozzles as specltied (see 6.2) for exadnation and testing within the time frame specified (see 6.2) to prove prior to starting pro- duction that his production methods and choice of design deta
17、il will produce nozzles that comply with the requirements of this specification. Examination and tests shall be as specified in Section 4 and shall be subject to surveillance and approval by the Government (see 6.3). 3.3 Material. Material shall be as specified herein. Materials not specified shall
18、be selected by the contractor and shall be subject to all provisions of this specification (see 6.5) 3 . 3 . 1 Alumintim tubing. Temper T6 . Aluminum tubing shall conform to WT-700/6, 3.3.2 Steel tubing. Steel tubing shall conform to ASTM A 513. 3.3.3 Brass. Brass bars shall conform to Q B-626, Comp
19、osition 11 or ASTM B 16. Brass sheet shall conform to QQ-B- 2- 13, Composition 11, quarter-hard or half-hard temper. ASTM B 124, Alloy C37700. or 852 Drop-forged brass shall conform to Cast brass shall conform to QQ-C-390, Alloy 857 3r shall conform to ASTM B584, Alloy C83600. 3.3.4 Miilleable cast
20、iron, Malleable cast iron shall conform to 1STMA 4/. 3.3.5 Cast aluminum. Cast aluminum shall conform to ASTM B 26, Alloy B443.U OK D/lZ am U 3.3.6 Castings. Holes in castings shall not be permitted. 3,4 Threads. Al1 screw threads shall be American National fire- hose coupling threads (NH) conformin
21、g to FED-SD-28, except when specified (see 6.2), 1-1/2-inch threads shall have 11-1/2 American National hose coupling thread (NPSH) per inch. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-N-32277F 42 W 7777906 0232036 7 m MIL-12279F 3*4.1 Ga
22、skets. Each internal thread connection shall be furnished with a rubber gasKet, d$q-nsions shall be as shown in Table I. Gaskets shall be rubber conforming to MIL-R-14328 and Table I. Gasket Dimensions Thread Inside Outside Size Diameter Diameter Thickness (inch es) (inches) (inches) (inch) 1-1/2 2-
23、112 3-112 4-1/ 2 1-9 / 16 2-1/16 2-9/16 3-3/16 3-3/4 4-1/4 5 5-3/4 1/8 3/16 3 /16 3/16 3,5 Nozzles. Nozzles shall be aluminm, brass, or zinc-plated malleable Iron, or zinc-plated steel, as specified (see 6.2 and 6.6). When epecified (see 6,2), material for Types I and II nozzles shall be corrosion r
24、esistant, and material for Types III and IV nozzles shall con- form to ASTM B 584, Alloy 836. The nozzles shall withstand a hydrostatic presoure not less than 1-1/2 times the specified operating pressure with- out any deformation of the nozzles or leakage. 3.6 Lu s Lu s shall be designed for use wit
25、h spanner wrenches con- Lugs, where required, shall be of the rocker type forming -%bW-865. to (sea 6.2). 3.7 Rough usage. The nozzles shall perform as specified herein after rough -zage. the nozzles on concrete from a height of 30 inches. Rough usage shall be defined as the equivalent of dropping 3
26、.8 igh temperatures. When subjected to a temperature of 71 C #or - rnalfuiction that may affect their operation, period of 48 hours, the valves shall not stick, bind, or have any othu: 3.9 Corrosion. Nozzles shall operate without binding or stickin . .* .I * , When subjected to the salt-spray test s
27、pecified in 4.5.2.2, the nozz f es ahall have no malfunction that might affect their operation. s:+ li. * 3.10 Performance. The nozzle performance, when foam liquid at 5 to F 7 percent somtlon xn water is used at 70 F, shall meet the fOl10Wbg operating requirements: _. Provided by IHSNot for ResaleN
28、o reproduction or networking permitted without license from IHS-,-,-VIL-N-12277F 42 m 999990b 0232017 9 m MILrN- 12 279F Nozzle Expana ion On e-Quart e r Pres sure Factor Drainage Time (psig) (minut es) 100 225 - I/ 6-10 6-10 3.5 - 7.5 4.0 - 7.5 Operating pressure shall be 100 psig for all nozzles u
29、nless otherwise specified (see 6.2) . - Variance from the nominal value of the water flow rate at 100 psi nozzle pressure shall not exceed plus or minus 5 percent. and 250-gpm capacity shall be furnished with two ring-type handholds, one located at the nozzle tip and the other at a convenient statio
30、n near the nozzle butt end. not interfere with air intake. Each nozzle o? 120- While being held by the operator, the handholds shall 3.11 Identification marking. The nozzles shall be identified in ac- The marking shall be applied to the nozzles cordance with MIL-STD-130 . on plates conforming to MIG
31、P-514, Composition C, of Type I, Grade A, Class 1 material. location where the plate will be both visible and legible. Each plate shall be attached by screws,.bolts, or rivets in a 3.12 Treatment and painting. The portions of the nozzles normally painted shall be cleaned, treated, and painted in acc
32、ordance with MIIrT-704, Type A, Color No. 14087 or No. 11136, as specified (see 6.2). All threaded and sliding ferrous parts shall be zinc-plated in accordance with QQ-2-325, Type i, Class 2. Aluminum alloy parts shall not be painted or dyed. 3.13 e I, stream, airaspirating, with pickup tube. The Ty
33、pc I nozzle shz: consist or a water-dlscnarge Jet or jets, an aerating chamber, a pipe-type mixing chamber, an internally threaded coupling fitted with water strainer for attachment to a water hose, and a tube to pick up liquid foam concentrates directly from a container. The water strainer may be o
34、mitted n l-1/2-inch nozzles, provided a 3/8-inch-diameter ball can pass through the nozzle. consist of a bushing for attaching to the foamnozzle, flexible tube, and a rigid extension having a pickup end for insertion into a foam-liquid can. The bushing shall have an external 3/4-inch national garden
35、-hose thread and shall be attached to the fledble tubing. vacum of 25 inches of mercury without collapsing. be 1/4-inch standard-weight pipe 15 inches long and shall be attached to the flexible tube. promote pickup, and shall contain a corrosion-resisting steel foam strainer (or brass strainer, when
36、 brass is specified as the material for construction The pickup tube shall be 70 inches long and shall The tubing shall withstand a The rigid extension shall The pickup end shall be enlarged and castellated to 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fro
37、m IHS-,-,-MIL-N-12279F of the nozzle), having a nod-1 thickness of 0.025 inch and 1/16-inch-diameter holes on 1/8-inch centers. The end of the extension shall have a removable screw cap or insert to permit removal and cleansing of the foam strainer. The pickup-tube hose assembly shall be attached to
38、 the nozzle-body internal connection by the 3/4-inch, threaded external fitting. When operating at a %foot differential between the nozzle and the level of foam liquid at 100 psig nozzle pressure, the minimum effective range shall be 45 feet for the nominal capacities specified. The nozzle shall mee
39、t the following operating requirements when using the pickup tube or when used with premixed solution: Nominal Water Capacity Thread Size at 100 psig Ekpansion Factor (inches) (gpm) 1-1/2 1-1/2 30 to 40 60 4-5 6 to 10 6 to 10 3.13.1 Class B, without pack. The Type I, Class B nozzle (see Figure 1) sh
40、all conform to 3.13 and consist of a nozzle and pickup-hose assembly (see 6.4). 3.13.2 Class C, flexible tube applicator, 1-1/2-inch, 60 gpm (100 psig). Type 1, Glass C nozzle (see Figure 2) consisting or pickup tube, flexible applicator, and retaining chain, shall have a nominal 60-gpm water capaci
41、ty at 100 psig (see 6.4). When specified (see 6.2), the butt end of the nozzle shall have a swivel connection with internally threaded 1-1/2 - 11-1/2 NPSH threads. A boss, threaded to receive the pickup tube specified in 3.13, shall be furnished in the nozzle body and fitted with a closure plug. fle
42、xible tubing with a permanently attached metal tip shall be mounted on a metal tube which extends from the mixing chamber. shall be a spirally wound steel spring, covered with neoprene-coated cloth. The flexible tubing shall extend approximately 2 inches over the metal tubing and the tip base. porti
43、ons of the tip and the mixing-chamber tube shall be 5-3/4 to 6-1/4 inches and 4-3/4 to 5-1/4 inches long, respectively. metal tube shall have a metal ring or clamp mounted so that it may rotate about the axis of the tube but cannot slide longitudinally, and shall be located approximately 1/4 inch fr
44、om the flexible tubing. or clamp shall have a metal eye securely mounted on it, and the metal-tube ring or clamp shall have a hook securely mounted on it. length of chain shall be fastened to the eye, and the free end shall be secured on the hook. 1 A 24-inch length of 2-1/2-inch outside diameter (O
45、.D.) The flexible tubing The tip end shall be smooth and round; exposed The tip base and the The tip ring i A 28- to 32-inch 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-N-12279F 42 977770b 0232017 2 = MIGN-12279F e II, stream;air-aspiratin
46、g, without pickup tube. The Type all be used to expand foam from premix foam solution. The nozzle shall be of the rigid-pipe type and shall include an aerating chamber and a water je6 or jets. A strainer for the l-i/Z-inch nozzle shall be provided except as specified in 3.13, and the strainer may be
47、 omitted for the 2-1/2-inch and larger nozzles prodded a 1/2-inch ball can pass through t1.2 nozzle. nozzles shall conform to Table II. The discharge capacity and range of the Table II. Typ e II Operating Requirements Thread No minal Water Capacity Size at 100 psig Range (feet) (inches) (gPm) 1-112
48、1-112 2-112 2-1 12 3-112 4-1 /2 30 to 40 60 +5 120 +5 250 T5 500 T5 1000 T5 45 45 65 85 125 125 , air-aspirating, with shaper and screen. The ure 3) shall consist o I w at er-solut ion dis charge jets, an aerating chamber or an airmixing chamber, and a spray-pattern device (see 6.4). nozzle :.;:all
49、be furnished with both shaper and screen. be provided except as specified in 3.14. Type III nozzles shall be as shown in Table III. Unless otherwise specified (see 6.2), the Type III A strainer shall Performance requirements for Table III. !QT e 111 Operating Requirements Size Water (minimum) Expansion Drainage (inches) (gpm at (feet) (minut es) Items Thread Nominal Range Minimum Quarter
