1、I INCH-POUND I 30 November 1990 SUPERSEDING 18 May 1982 MIL-L-2461 lA(SH) MIL-L-24611(SH) MILITARY SPECIFICATION LIFE PRESERVER SUPPORT PACKAGE FOR LIFE PRESERVER, MK 4 1: .% i This specipcation is approved for use by the Naval Sen Systems Commnnd, Department of the Navy, and is avalnble for use by
2、all departments and agencies of the Deparfment of Defense. E 1. SCOPE 1.1 Scope. This specification covers requirements for construction and performance for MK 4 life preserver, repair kit and spare parts and test kit for the life preserver support package (see 6.2). 2. APPLICABLE DOCUMENTS 2.1 Gove
3、rnment documents. 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defe
4、nse Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). 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 Comma
5、nd, SEA 5523, Depart- ment of the Navy, Washington, DC 20362-5101 by using the self-addressed Standardization Document Improve- ment Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC NIA FSC 4220 DISTRIBUTION STATEMENT A. Approved for public release; distribution is un
6、limited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-24bLLA 42 777770b 04bL727 5 SPECIFICATLONS FEDERAL V-T-285 PPP-F-320 MILITARY MIL-L-3454 MIL-R-6855 MIL-C-16385 MIL-L-19140 MIL-M- 19595 MIL-C-25369 MIL-W-44049 STANDARDS FEDERAL FED-STD-
7、595 Thread, Polyester Fiberboard; Corrugated and Solid, Sheet Stack (Container Grade), and Cut Shapes Life Preservers: Packaging of Rubber, Synthetic, Sheets, Strips, Molded or Extruded Shapes, Cartridge, Carbon Dioxide, Inflatable Life Preserver Use Lumber and Plywood, Fire-Retardant Treated Magnet
8、ic Effect Limits for Nonmagnetic Equipment Used in Cylinders, Carbon Dioxide, for Inflation of Pneumatic Life Webbing, Textile and Tape, Textile, Polypropylene, General General Specification for the Proximity of Magnetic Influence Ordnance Preservers Purpose, Natural or in Colors Colors (Unless othe
9、rwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 191 11-5094.) 2.1.2 Other Government documents, drawings, and publications, The following other Gove
10、rnment documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation. DRAWINGS NAVAL SEA SYSTEMS COMMAND (NAVSEA) 592-6383528 592-6383529 592-6383530 592-6383532 592-6383533 Life Preserver
11、 Support Package - Life Preserver, Mark 4 (Assembly and Data List) Life Preserver Assembly, Yoke Type Scuba, USN Mark 4 Cover Assembly, Outer Bladder Assembly, Inner Stem Assembly, Inflator 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-592-638356
12、4 592-6383565 592-6383581 803-1411524 CO, Holder and Holder Gage Details Spare PartSnest Kit Repair Kit Holder CO, and Holder Gage Details (Application for copies should be addressed to: Commander, Portsmouth Naval Shipyard, Code 202.2, Portsmouth, NH 03801.) PUBLICATIONS UNITED STATES COAST GUARD C
13、ode of Federal Regulations, Title 46, Sub-chapter II P 160.060 Marine Buoyant Devices 160.064 Marine Buoyant Devices s- (Application for copies should be addressed to the Superintendent of Documents, Government Printing Office, Washington, DC 20402.) 2.2 Non-Government publications. The following do
14、cument forms a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DOD adopted shall be those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODISS
15、are the issues of the documents cited in the solicitation (see 6.2). AMERICAN SOCIETY FOR “G AND MATERIALS (ASTM) B 117 Standard Method of Salt Spray (Fog) Testing; (DOD adopted) B 194 Standard Specification for Copper-Beryllium Alloy Plate, Sheet, Strip and Rolled Bar; (DOD adopted) B 196 Standard
16、Specification for Copper-Beryllium Rod and Bar Metric; (DOD adopted) B 197 Standard Specification for Copper-Beryllium Alloy Wire; (DOD adopted) a (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) (Non-government
17、 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.) 23 Order of precedence. In the event of a conflict between the text of this docume
18、nt and the references cited herein, the text of this document shall take precedence. Nothing in this 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-2461LA 42 777770b 0461731 3 MIL-L-2461 lA(SH) document, however, supersedes applicable laws a
19、nd regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2) a sample shall be subjected to first article inspection (see 6.4) in accordance with 4.3. 3.2 Material. The life preserver shall be constructed of materials as specified on the a
20、pplicable drawings and as specified herein. 3.2.1 Recovered materials. Unless otherwise specified herein, all equipment, material, and articles incorporated in the products covered by this specification shall be new and may be fabricated using materials produced from recovered materials to the maxim
21、um extent practicable without jeopardizing the intended use, The term “recovered materials“ means materials which have been collected or recovered from solid waste and reprocessed to become a source of raw materials, as opposed to virgin raw materials. None of the above shall be interpreted to mean
22、that the use of used or rebuilt products is allowed under this specification unless otherwise specifically specified. 3.2.2 Nonmagnetic material. withstands the magnetic effects test of 4.9.13. The life preserver shall be constructed of material which 3.2.3 Mechanical inflation system. 3.2,3.1 Infla
23、tor assemblies. Each life preserver shall be provided with two assemblies consisting of two dual inflators conforming to Drawing 592-6383564. The assembly shall consist of holders for use with CO, cartridges conforming to type II of MIL-C-16385 or type I of MIL-C- 25369. Holders shall withstand a hy
24、drostatic pressure of 1,500 pounds per square inch (lb/in2) gauge for 0.5 seconds. 3.2.3.2 Preserver holder assemblies. The preserver holder assemblies shall have levers and setscrews fabricated from Beryllium Copper conforming to ASTM B194; There shall be provisions for securing the actuating lever
25、s against the sides of the holders by a red retaining clip. The holder threads shall be cold formed, rolled thread, and shall be coated with a silicone grease after the holders have been assembled on the life preserver. There shall be Beryllium Copper springs made of wire conforming to ASTM B194 to
26、provide that the piercing pins separate from the cartridges immediately after puncturing to preclude any possibility of delay in inflation by the pins remaining in and sealing the holes. The piercing pins shall be Beryllium Copper conforming to class A of ASTM Bi96 and B197. 3.2.3.3 Inflation lanyar
27、d. The inflation lanyard assembly shall be as detailed on Drawing 592- 6383529. The lanyard assembly shall not break or fail at less than a minimum breaking strength of 50 pounds (see 4.9.15). 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-2
28、461 lA(SH) 3.2.3.4 Inflator stem. The holder shall be securely attached to the life preserver by means of an uncoated brass inflator stem conforming to Drawing 592-6383533. Two synthetic rubber gaskets conforming to class 2, type A, grade 80 of MIL-R-6855 shall be provided, one for each side of the
29、holder attachment. The inflator stem shall provide a zero leakage connection between the inflation assembly and the life preserver. 3.2.4 Color. Life preserver parts and materials shall have exterior color in accordance with number 37038 of FED-STD-595. 3.2.5 Thread. Thread used for all sewing shall
30、 conform to type II, class 1, size F of V-T-285 and shall be colored to match the items sewn. i 3.2.6 Bladder. The material used for the bladder shall be a polyether base, polyurethane film that can be dielectrically heat sealed to itself. The film shall be fungus resistant and contain no waxes or o
31、ther ingredients which adversely affect its dielectric sealability. The film shall be of a clear color with a matte finish on both sides. The material shall have air-holding characteristics and be free of pin holes, surface imperfections, and particles of foreign matter. The film shall meet the phys
32、ical requirements of table I (see 6.3). I TABLE I. Physical requirements of polyurethane firm. Characteristic Requirement Specific gravity Hardness Brittle temperature (masland SPI cold crack) Tensile strength (ultimate) Ultimate elongation (at break) Tear strength (graves) Abrasion resistance: (tab
33、er) loo0 cycles, CS17 wheel; load loo0 grams Percent weight loss 1.1 80 Shore A (typical) Minus 70 degrees 3000 lb/n2 minimum (min.) 500 percent min. 400 lb/in2 min. Fahrenheit (“F)/maximum (max.) 0.06 percent max. 3.2.7 Outer covering. The outer covering shall conform to the requirements (see 6.3)
34、on Drawing 592-6383530 and meet the physical requirements of tble II. TABLE II. Physical requirements of outer covering. Characteristic Requirement Burst strength (Mullen Hydrostatic) Tensile strength (grab method) Elongation at break Tear (tongue method) Puncture resistance 70 pounds min. Tear (tra
35、pezoid method) Blocking scale rating No. 2 600 pounds min. 500 warp x 400 fill pounds min. 37 x 32 percent max. 20 x 20 pounds min. 30 x 20 pounds min. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-2qbLLA i.12 m 7777706 04bL733 7 m MIL-L-24
36、611A(SH) 3.2.8 Webbing. The webbing shall be in accordance with MIL-W-44049 and shall meet the performance requirements for webbing of Coast Guard Specifications 160.060 and 160.064 (see 6.3). 3.2.9 Corrosion resistance. The oral valve, relief valve, CO, inflation devices and all metal parts shall b
37、e made of corrosion-resistant material and shall show no evidence of corrosion after subjection to the 100-hour salt spray test of 4.9.12. 3.3 General requirements. 3.3.1 Manufacture and assembly, preservers shall conform to Drawing 592-6383528. The manufacturing and assembly details of the life 3.3
38、.2 Meat sealing. A radio frequency dielectric heat sealing process shall be used in the attachment of all parts and the construction of the seams of the inner bladder. The seams of the inner bladder shall be as shown on Drawing 592-6383532. The seams shall withstand a 20 pound per inch (lb/in) peel
39、load (see 4.9.11). 3.3.3 Marking. Identification marking shall be by silkscreen method using white ink. The marking shall be waterproof and cause no deterioration of fabric. 3.3.3.1 Serial numbers. Each life preserver shall be identified by a consecutive number (serial number) assigned by the manufa
40、cturer to cover the entire contract quantity. Serial numbers shall be located in accordance with Drawing 592-6383530. 3.3.4 Repair kit. Each life preserver shall be provided with a repair kit consisting of the items listed on Drawing 592-6383581. 3.3.5 Spare parts or test kit. Two spare parts or tes
41、t kits shall be provided. Each spare parts or test kit shall consist of the items listed on Drawing 592-6383565. 3.4 Reliability. The life preserver shall be constructed in a manner that will ensure a 97 percent operational reliability with a 95 percent confidence level under all combinations of sto
42、rage and operating environments (see 4.9.14). 3,5 Operation. When an inflation mechanism containing two CO, cartridges is released into the life preserver, the preserver shall fully inflate in not more than 5 seconds. 3.6 Hydrostatic pressure. The life preserver shall operate properly after being su
43、bjected to the hydrostatic pressure cycle test (see 4.9.1.1). 3.7 Impact. The life preserver shall withstand an impact of 18 feet per second. 3.8 Buoyancy. The life preserver shall support a lead weight, weighing 42 pounds, without sinking. 6 Provided by IHSNot for ResaleNo reproduction or networkin
44、g permitted without license from IHS-,-,-MIL-L-2633A 42 9999706 0463734 9 _ - . - MIL-L-2461 lA(SH) 3.9 Operation of oral valve. 3.9.1 During assembly. The purge ports of the oral valve shall operate properly before and after the button is depressed. 3.9.1.1 After assembly. After inflation through t
45、he oral valve, the purge ports shall prevent water from entering the inner bladder. When the preserver is inflated until the relief valve opens, the oral valve shall operate and shall not leak when the preserver is fully inflated. The oral valve shall work without difficulty and shut off securely wh
46、en the preserver is deflated. 3.10 Pressure. The preserver shall withstand a pressure test of 5 lb/in2 after the over-pressure . relief valve is removed and the opening capped. 3.11 Leakage. + 3.11.1 Twenty-four hours. The life preserver shall have an internal pressure, corrected for barometric pres
47、sure and temperature, of not less than 1.0 lb/in2 after being inflated to 1.5 lb/in2 and allowed to stand for 24 hours. 3.11.2 Six hours. The life preserver shall remain firm after being inflated until the relief valve opens and allowed to stand for 6 hours. 3.12 Operation of relief valve. The relie
48、f valve shall relieve at a pressure of 2.5 +- 0.5 lb/inz - - (see 4.9.6). 3.13 Oral inflation hose. 3.13.1 Porosity. The oral inflation hose shall show no evidence of leakage due to porosity nor weakening of the hose as revealed by excessive deformation in any portion of the hose when subjected to a
49、n internal air pressure of 15 lb/in2 for not less than 10 seconds while submerged in water (see 4.9.9.1). 3.13.2 Tensile strength. The tensile strength of the oral inflation hose shall be not less than 50 pounds (see 4.9.9.2). 3.14 Holding strength (oral inflation assembly). The loadrequired to separate the hose from the oral inflation valve or oral inflation elbow shall be not less than 50 pounds (see 4.9.10). 4. QUALITY ASSURANCE PROVISI
