1、*-. y*- MIL-S-2468bA 42 = 999990b 0528760 b = /INCH-POUND MIL-S-24686A(SH) 19 Mav 1992 SUPERSEDING 4 December 1987 (See 6.6) MIL-S-24686(SH) MILITARY SPECIFICATION SPRINKLER, AUTOMATIC, QUICK RESPONSE 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 of Defense, 1.1 SCOPE 1.1 Scope. This specification covers automatic, thermo sensitive, quick response (QR) sprinklers installed in overhead sprinkler systems for shipboard firefighting service. Sprinklers meeting this specific
3、ation are suitable for use in seawater piping systems. 1.2 Classification. Sprinklers shall be of the frangible bulb type in pendant, upright, or horizontal sidewall configuration as defined in ANSI/UL 199. 2. APPLICABLE DOCUMENTS 2.1 Government documents, 2.1.1 Specifications. standards, and handbo
4、oks. The following specifi- cations, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplemen
5、t thereto, cited in the solicitation (see 6.2). I f Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 5523, Department of the Navy, Washington, DC 20362-5
6、101 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. I AMSC N/A FSC 4210 O DISTRIBUTION STATEMENT A. Approved for public release; distribution is Unlimited. Provided by IHSNot for ResaleNo reproduction or net
7、working permitted without license from IHS-,-,-. MIL-S-24686A 42 9999906 0528761 8 I MIL-S-24686A(SH) SPECIFICATIONS FEDERAL QQ- C - 390 QQ-N-286 MILITARY MIL-F-1183 MIL-P-116 MIL- S - 196 MIL-R-83248 MIL- S - 901 - Copper Alloy Castings (Including Cast Bar). - Nickel-Copper-Aluminum Alloy, Wrought
8、(UNS N05500). - Fitting, Pipe, Cast Bronze, Silver Brazing, General - Preservation, Methods of. - Support Items, Accessories, and Kits, Mechanical; - Rubber Fluorocarbon Elastomer, High Temperature, - Shock Tests, H.I. (High Impact); Shipboard Specification for. Packaging of. Fluid, and Compression
9、Set Resistant. Machinery, Equipment and Systems, Requirements for Navy. STANDARDS MILITARY MIL-STD-167-1 - Mechanical Vibrations of Shipboard Equipment (Type I - Environmental and Type II - Internally Excited). (Unless otherwise indicated, copies of federal and military specifications, standards, an
10、d handbooks are available from the Standardization Documents Order Desk, BLDG. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2.2 Non-Government publications. The following document(s) form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the d
11、ocuments which are 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 solicitaton (see 6.2). AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) B1.20.1
12、- Pipe Threads, General Purpose (Inch). (DoD adopted) B46.1 - Surface Texture (Surface Roughness, Waviness and ANSI/UL 199 - Automatic Sprinklers for Fire Protection Service. Lay). (DoD adopted) (Application for copies should be addressed to the American National Standards Institute, 1430 Broadway,
13、New York, NY 10018.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) A 582 - Standard Specification for Free-Machining Stainless and Heat-Resisting Steel Bars. Hot-Rolled or Cold-Finished B 16 - Specification for Free-Cutting Brass Rod, Bar, and Shapes for Use in Machine Screws 2 Provided by IHSNo
14、t for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-2468bA 42 m 9779906 0528762 T m MIL-S-24686A(SH) ASTM (Continued) B 36 - Standard Specification for Brass Plate, Sheet, Strip, and B 62 - Standard Specification for Composition Bronze or Ounce B 103 - Specificatio
15、n for Phosphor Bronze Plate, Sheet, Strip, and B 139 - Specification for Phosphor Bronze Rod, Bar, and Shapes. B 140 - Specification for Copper-Zinc-Lead (Leaded Red Brass or B 152 - Specification for Copper Sheet, Strip, Plate, and Rolled B 176 - Specification for Copper Alloy Die Castings. B 194 -
16、 Specification for Copper-Beryllium Alloy Plate, Sheet, B 301 - Specification for Free-Cuttirig Copper Rod and Bar. B 443 - Specification for Nickel-Chromium-Molybdenum-Columbian Alloy (UNS N06625) Plate, Sheet, and Strip. B 465 - Specification for Copper-Iron Alloy Plate, Sheet, Strip, and Rolled B
17、ar. B 584 - Specification for Copper Alloy Sand Castings for General Applications. B 670 - Specification for Precipitation Hardening Nickel Alloy (UNS N07718) Plate, Sheet, and Strip for High-Temperature Service, Application. Rolled Bar. (DoD adopted) Metal Castings, (DoD adopted) Rolled Bar. Hardwa
18、re Bronze) Rod, Bar, and Shapes. Bar. Strip, and Rolled Bar. B 763 - Specification for Copper Alloy Sand Castings for Valve (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) NATIONAL FIRE PROTECTION ASSOCIATION (
19、NFPA) NFPA 13 - Standard for Installation of Sprinkler Systems. (Application for copies should be addressed to the National Fire Protection Association Inc., Batterymarch Park, Quincy, MA 02269.) (Non-Government standards and other publications are normally available from the organizations that prep
20、are or distribute the documents. These documents also may be available in or through libraries or other informational services.) 2.3 Order of Drecedence. In the event of a conflict between the text of this document and the references cited herein (except for related associated detail specifications,
21、 specifications, specification sheets or MS standards), the text of this document takes precedence. supersedes applicable laws and regulations unless a specific exemption has been obtained. Nothing in this document, however, 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall
22、 be subjected to first article inspection (see 6.4) in accordance with 4.3. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Th MIL-S-Z468bA 42 9979906 0528763 II 3.2 Desim. 3.2.1 General. The automatic sprinklers shall be the frangible bulb type. s
23、prinklers shall meet the sensitivity requirements for quick response sprinklers defined in ANSI/UL 199. extended periods of time when pressurized with seawater. The sprinklers shall open as intended and release all parts at pressures of 5 to 175 psig, when the bulb temperature is within the actuatin
24、g temperature range defined in ANSI/UL 199. The sprinklers shall be leak tight for 3.2.2 Temperature rating. Automatic sprinkler temperature ratings, temperature classifications, maximum overhead temperatures and colors coding shall be as specified in table I. The temperature classification and fram
25、e colors shall be consistent with ANSI/UL 199 for each temperature rating. temperatures shall be consistent with ANSI/UL 199 for maximum ceiling temperatures. The bulb colors shall be consistent with NFPA 13. The maximum overhead TABLE I. Temperature rating and color coding. Color coding Maximum Tem
26、perature 1 Temperature I overhead I 1 rating (OF) 1 Frame I Bulb temperature (OF) I I classification Ordinary Intermediate Intermediate 155 175 200 None Red White Yellow White Green I 150 150 3.2.3 Nominal orifice size. Nominal orifice sizes, corresponding discharge coefficients, and identification
27、features shall be as specified in table II and shall be consistent with ANSI/UL 199 requirements. Dimensional tolerances on orifice sizes shall be consistent with ANSI/UL 199 requirements. The discharge coefficient “K“ is defined as: K=Q Jp Where : Q = Flow, gallons per minute (gpm) P = Supply press
28、ure, lb/in2 gage (psig) The discharge coefficient shall be determined in accordance with the method of ANSI/UL 199. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4- . Discharge coefficient IIKII MIL-S-2468bA 42 99999Ob 0.528764 3 = Nominal orific
29、e size marked pint i e* on frame TABLE II. Nominal orifice size and discharpe caDacity. 1.3 - 1.5 2.6 - 2.9 5.3 - 5.8 7.4 - 8.2 Orifice type Yes Yes No Yes Small Small Standard Large Nominal orifice size (in.) 1/4 3/8 1/2 17/32 Yes Yes No Yes * A stationary pin or rod used to identify non-standard o
30、rifice sizes. 3.2.4 Inlet threads. The sprinkler body shall be constructed with a 1/2 inch NPT male thread in accordance with ANSI B1.20.1. Threads shall be clean cut and true, and free from burrs, scoring, or chatter marks, 3.2.5 Seal design. The seal between the orifice cap and the sprinkler body
31、shall conform to the design described in 3.2.5.1 or 3.2.5.2. designs are acceptable. No other seal 3.2.5.1 O-Ring sed. The seal shall be provided by a radial O-ring in the orifice bore. cap. A wave spring, Belleville washer, or similar ejector or spring device shall be under the shoulder area of the
32、 orifice cap, in the counterbore of the sprinkler frame, as applicable. the O-ring, orifice cap, and sprinkler body in a seawater environment. The basic design concept is illustrated on figure 1. The O-ring shall be captive in the O-ring groove in the orifice e Any lubricant used on the O-ring shall
33、 be compatible with WAVE OR ELLNiUE SPRING O-RING SPRINKLER rWE -RING GROOVE ORIFICE CAP FIGURE 1. O-Rinn seal design. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.2.5.2 Washer seal. The seal shall be provided by a teflon coated Belleville spr
34、ing washer under the shoulder of the orifice cap, in the counterbore in the sprinkler frame. The basic design concept is illustrated on figure 2. , TEFLON SPRING COATED WASHER SPRINKLER WE ORiflCE CAP FIGURE 2. Washer seal design. 3.2.6 Preload retention. The automatic sprinkler shall be chemically
35、or mechanically staked to maintain the manufacturers assembly load. The preload shall not be alterable by the rise of common hand tools without causing visible damage to the sprinkler. 3.2.7 SDecial tools. Special tools shall not be required for installation and routine maintenance of sprinklers. Sp
36、ecial tools are defined as those tools not listed in the Federal Supply Catalog (copies of this catalog may be consulted in the office of the Defense Contract Management Area Operations (DCMAO). 3.3 Materials. 3.3.1 Materials of construction. Materials of construction shall conform to table III for
37、each component. If a material is not specified for a particular component, the material selected shall be suitable for the purpose intended. Furthermore, material for internal components in contact with the system fluid shall be compatible with seawater, and materials for external components shall b
38、e compatible with a marine atmospheric environment. 3.3.2 Coatings - and platings. - Automatic sprinklers shall not be plated or coated, accordance with 3.6. Paint shall be permitted only for the purpose of color coding/marking in 3.4 Performance 3.4.1 General. Automatic sprinklers shall meet all of
39、 the performance requirements for quick response automatic sprinklers specified in ANSI/UL 199. In addition, automatic sprinklers shall meet all performance requirements for standard automatic sprinklers specified in ANSI/UL 199. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted
40、 without license from IHS-,-,-4- MIL-S-24686A 42 m 9999906 0528766 7 3.4.2 Shock. Automatic sprinklers shall withstand the shock requirements of e grade A, hull mounted, class I, type C as specified in MIL-S-901 (see 4.5.3). 3.4.3 Vibration. Automatic sprinklers shall conform to type I vibration req
41、uirements specified in MIL-STD-167-1 (see 4.5.4). TABLE III. Materials of construction. Component Frame Deflector Orifice Cap Load Screw and Bushing Belleville Spr ing/Uave Uasher O-ring UNS Nunber C83450 C83600 C83800 C87800 C84400 c11000 C19400 C19500 c22000 C23000 C24000 C26000 C51000 c11000 CI45
42、00 c22000 C23000 C31400 C3 1600 C32000 C51000 C52100 C54400 c21000 c22000 C32000 C31400 C31600 C36000 C54400 C67820 C5 1 O00 SO3000 C17000 CI7200 NO5500 NO6625 NO7718 Description Leaded Red Brass Cast Leaded Red Brass Cast Leaded Red Brass Cast Silicon Bronze Cast Semi-Red Brass Electrolytic Tough P
43、itch Copper High Copper Alloy High Copper Alloy Comnercial Bronze, 90% Red Brass, 85% Low Brass, 80% Cartridge Brass, 70% Phosphor Bronze, 5% Copper Phosphorus Deoxidized Copper, Telluriun bearing Comnercial Bronze, 90% Red Brass, 85% Leaded Comercial Bronze Leaded Comnercial Bronze (Nicke 1 Bear i
44、ng) Leaded Red Brass Phosphor Bronze, 5% Phosphor Bronze, 8% Phosphor Bronze 6-2 Gilding, 95% Cmrcial Bronze, 90% Bronze Leaded Cmrcial Bronze Leaded Comercial Bronze (Nickel Bearing) Free cutting Brass Phosphor Bronze 8-2 Manganese Bronze Phosphor Bronze, 5% Stainless Steel Beryliun Copper Beryliun
45、 Copper NiCu Alloy Precipitation Hardenable (Monel K500) Ni-Cr ALloy Solid Solution Strengthened ( I ncone 1 625 ) Ni-Cr Alloy Precipitation Hardenable (Inconel 718) Flourocarbon Rubber 4wlicable Swcifications 4STH 8584, 8763 4STH 8584, FED PP-C-390 4STM 8176 9STH 8584, 8763, Fed-QQ-C-390 NTH 662, 6
46、584, PP-c-390 9STH 8152 RSTM 8465 kSTH 8465 RSTH 836 RSTH 836 RSTH 836 RSTH 836 RSTH 8103 ASTH 8152 ASTM 8301 ASTH 836 ASTM 636 ASTH BI40 ASTH 6140 ASTH 8140 ASTM 8103 ASTH 8103 ASTH 8103 ASTH 636 ASTH 836 ASTH 8140 ASTM 8140 ASTM 8140 ASTH 816 ASTM 8103, 8139 No Specification ASTH BI03 ASTM 582 AST
47、H 8194 ASTH 8194 FED PQ-N286 ASTM 8443 ASTH 8670 MIL-R-83248B Type 1, Class 1 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-The sample shall be installed upright, pendant, or horizontal as required. Tests shall be performed unpressurized and pres
48、surized to 175 psig. Leakage or weeping during test, material failure, loosening or deformation of parts shall be cause for rejection. requirements of the leakage test in ANSI/UL 199 and the oven heat test portion of the sensitivity test. After completion of test, the sample shall comply with the 3.
49、5 Production testing. Manufacturing and production testing shall comply with the requirements of ANSI/UL 199. 3.6 Marking. Identification marking shall comply with the requirements of ANSIDL 199, and the following: (a) (b) Frangible bulb color coding shall comply with NFPA 13 (same as table I). The deflector shall be legibly and permanently stamped with the symbol “N“ indicating compliance with this specification. The symbol size shall be
