1、20 December 1988 SUPERSEDING MI L-L-85824(AS) 20 October 1987 MILITARY SPECIFICATION LIFE RAFT, INFLATABLE, ONE MAN, This specification is approved for use within the Naval Air Systems Command, Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defe
2、nse. VEE BOTTOM, LRU-l8/U 1. SCOPE 1.1 Scope. This specification covers requirements for one type of a one man, vee bottom, inflatable Tife raft with inflation equipment designated as LRU-l8/U. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. The following specif
3、ications an standards form a part of this specification to the extent specified he ein. in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation. Unless otherwise specified, the issues of these documents shall be tho 8
4、“ e listed SPECIFICATIONS FEDERAL PPP-B-636 - Boxes, Shipping, Fi berboard PPP-6-1055 - Barrier Material, Waterproofed, Flexible P P P-T-7 6 - Tape, Pressure-Sensitive Adhesive, Packaging/paper(For Carton Sealing) MILITARY MIL-P-116 - Preservation, Methods of MIL-1-23145 - Inflation Assemblies, Life
5、 Preserver MIL-C-52053 - Cylinder, Carbon Dioxide, 2 Ounce, Capacity MIL-0-81375 - Oral Inflation Assemblies, Survival Equipment, Inf 1 atabl e Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document Commanding Officer, Naval
6、Air Engineering Center, Systems Engineering and Standardizations Department (SESD), (Code 53, Lakehurst, NJ, 08733-5100, by using the self-addressed Standardization (DD Form 1426) appearing at the end of this document or by letter. should be addressed to: Document Improvement Proposal -. THIS DOCUME
7、NT CONTAINS 2 I PAGES. AM S C- N / A FSC-4220 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-L-S824A LI2 9797906 02365Lb 3 . STANDARDS FED ERAL FED-STD-191 FED-ST
8、D-7 51 MILITARY MIL-STD-105 MIL-STD-129 MIL-STD-130 - Textile Test Methods - Stitches, Seams and Stitching - Sampl ing Procedures and Tables for Inspection by Attributes Marking for Shipment and Storage Military Property - - Identification Marking of U.S. 2.1.2 Drawings and publications. The followi
9、ng Government drawings form a part of this specification to the extent specified herein. specified, the issues shall be those in effect on the date of the solicitation, Unless otherwise NAVAL AIR SYSTEMS COMMAND 105AS 1 O0 - Gaskets, and Gasket Replacement 1106AS 1521AS 1521AS Kits 11 - Tag, Warning
10、, Inflatable Life Preservers and Life Rafts 02 - Life Raft Assembly, Inflatable, One Man, VEE Bottom, Type LRU-l8/U 03 - Patterns, Life Raft, Inflatable, One Man, VEE Bottom, LRU-l8/U 1 521AS1 04 - Details, VEE Bottom Life Raft 1521AS105 - Manifold Stem Assembly 1 52 1 AS200 - Folding Procedure, Lif
11、e Raft, Inflatable, One Man, VEE Bottom, LRU- 18/U (Copies of specifications, standards, drawings and pub1 i cations requi red by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.) 2.2 Other publ
12、ications. The following document forms a part of this specification 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 specified in the solicitation. Unless otherwise specified, the issues of
13、documents not listed in the DODISS shall be the issue of the nongovernment documents which is current on the date of the solicitation. 1 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-85829A 42 7774706 0236517 5 MIL-L-85824A(AS) * r a DEPART
14、MENT OF TRANSPORTATION CODE OF FEDERAL REGULATIONS 49 CFR - Department of Tran (Application for copies of the Department of Transportat Regulations (CFR) should be addressed to the Superintendent Government Printing Office, Washington, DC 20402.) por tat i on on Code of Federa of Documents, U.S ween
15、 the text of 2.3 Order of precedence. In the event of a conflict be sDecification and the references cited herein (except for associated detail Specifications, specification sheets or MS standards), the text of this specification shall take precedence. Nothing in this specification, however, shall s
16、upersede applicable laws and regulations unless a specific exemption has his been obtai ned. 3. REQUIREMENTS 3.1 Qualification The LRU-l8/U vee bottom inflatable under this specificat on shall be a product which is author activity for listing on the applicable qualified products 1 for opening of bid
17、s (see 4.3 and 6.3). ife raft furnished zed by the qualifying st at the time set 3.2 First article. When specified in the contract or purchase order, samples shall be subjected to first article inspection (see 4.4. and 6.4). 3.3 Materials and components. The materials and components shall conform to
18、 the amlicable specifications, standards and drawings as listed or required herein (see 6.2.ii(l). components, except for metallic parts, used in the construction of the life raft shall have been manufactured not more than 18 months prior to the date of delivery of the life rafts (see 6.2.1i(2). Unl
19、ess otherwise specified; the materials and 3.4 Design. The life raft shall consist of two separate cellular flotation chambers. Inflation of the upper second, third and fourth cells shall be by a carbon dioxide inflation system and an oral inflation system. The remaining cells shall be inflated by a
20、n oral inflation system. All life raft seams, and inflation-system attachments (carbon dioxide and oral); shall be secured by heat sealing. No repair patches shall be used in the construction of the life raft. 3.5 Construction. The construction of the life raft and its components shall be in accorda
21、nce with the requirements of this specification and drawing 1521AS102. 3.5.1 Patterns. The panels for the life raft shall be cut in strict accordance with the pattern drawing 1521AS103 furnished by the Government (see 6.5). The Government pattern drawings shall not be altered in any manner and shall
22、 be used for making the working patterns. The working patterns shall be identical to the Government furnished pattern drawings. 3.5.2 Seams. Unless otherwise specified in the contract, all seams shall be heat sealed in accordance with applicable drawing requirements. 3 Provided by IHSNot for ResaleN
23、o reproduction or networking permitted without license from IHS-,-,-MIL-L-85824A 42 m 7999906 0236538 7 m 3.5.3 Cut edges. All of the cut edges of uncoated, nylon, fibrous materials shall be seared to prevent fraying. No sharp edges shall be formed. 3.5.4 Oral inflation assembly. The oral inflation
24、assemblies shall be in accordance with MIL-0-81375. and the location of the assembly on the life raft shall be in accordance with the applicable drawing requirements. Type, class and style of the assembly components, 3.5.5 Carbon dioxide inflation assembly. The carbon dioxide inflation assembly shal
25、l be in accordance with MIL-1-23145, except that it shall not contain a lanyard. The type of assembly and its location on the life raft shall be in accordance with the applicable drawing requirements. 3.5.5.1 Carbon dioxide cylinder. The carbon dioxide cylinder furnished with the 1 ife raft chal 1 c
26、onform to MIL-C-52053. 3.5.5.2 Manifold stem. The manifold stem assembly shall be in accordance with drawing 1521AS105. Attachment to the life raft shall be achieved by heat sealing at the location specified in the applicable drawing. 3.5.5.2.1 Gaskets. Gasket for the inflator assembly shall be in a
27、ccordance with drawing 105AS100. installation (see 4.8.1.1.1). Each gasket shall be dimensionally checked prior to 3.5.5.3 Diffusor. A diffusor, fabricated in accordance with drawing 1521AS104, shall be located on the life raft as specified in drawing 1521AS102. The diffuser shall in no way interfer
28、e with the heat welds for the carbon dioxide cell. 3.5.5.4 Carbon dioxide cylinder cover. A carbon dioxide cylinder cover, fabricated in accordance with drawing 1521AS104, shall be located on the life raft as specified in drawing 1521AS102. 3.5.6 Scuff panel. A scuff panel, fabricated in accordance
29、with drawing 1521AS103, shall be located on the life raft as specified in drawing 1521AS102. Attachment shall be by cementing (see 3.5.7). . 3.5.7 Use of adhesive. When the use of adhesive is specified (see 3.5.61, the surfaces to be joined shall be thoroughly cleaned with a suitable solvent so tha.
30、t the dusting materials (zinc stearate or talc) and any other surface contaminants are removed. Care shall be exercised to assure that the coating and base undercloth are not damaged and the adhesive between both is not impaired in any way by prolonged exposure to the solvent. completely prior to th
31、e application of the adhesive, and shall leave no residue. The cemented areas shall not contain any voids, channels, or excessive wrinkles. The adhesive shall be controlled to insure that old adhesive or adhesive which has partially or completely polymerized is not used. A fresh batch of the adhesiv
32、e shall be used at least every eight hours during the course of manufacture. The containers for the adhesive shall be free from congealed adhesive before being refilled. Care shall be taken to ensure that the adhesive is completely dry prior to folding the life raft to preclude adhering of the life
33、raft sides to each other. The solvent used shall evaporate 3.5.8 Stitching. Stitching is limited to the fabrication of the diffusor (see 3.5.5.3), the carbon dioxide cylinder cover (see 3.5.5.4) and pocket assembly. All sewing shall be accomplished with Stitch Type 301 conforming to 4 Provided by IH
34、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-L-85824A 42 999790b 0236539 7 e P a FED-STD-751 and shall contain 6 to 10 stitches per inch. The ends of the stitching shall be backstitched by overlapping on itself with continual stitching for not less than 1/2
35、 inch. Thread breaks, skips, and run-Offs shall be overstitched not less than one inch. Proper thread tension shall be maintained so that there shall not be any loose or overly tight stitches. All thread ends shall be trimmed to a length not greater then 3/8 inch. 3.6 Color. The color of the life ra
36、ft and components shall be as specified in the appl i cable drawi ngs. 3.7 Markings. Markings shall be in accordance with MIL-STD-130 and applicable drawing requirements. shall be as specified therein. LetterS.and numerals, 1/4 inch or less in height, Ink, color, size, and location of the markings a
37、nd 3.7.1 which wi block of shall be 3.7.2 shall not be stencilled. thoroughly dry prior to folding, preservation, and packing. All markings shall be legible, durable, permanent, Serial numbers. Each life raft shall be identified by a serial nu 1 be assigned by the manufacturer. Serialization shall b
38、e achieved consecutive numbers to cover the entire -acquisition quantity. Mark in accordance with 3.7. Warning tag. A warning tag conforming to drawing 1106ASlll strung with twine, shall be securely tied around the carbon dioxide manifold. Attachment shall be in such a manner that will make the tag
39、conspicuous. 3.8 Performance characteristics. 3.8.1 Operation (carbon dioxide). The life raft, when inspected for operation as specified in 4.8.2, shall inflate to its design shape, as shown in seconds without any evidence of impediment or blockage to the flow of the carbon dioxide gas or restrictio
40、n by any component. The life raft shall not show any evidence of material or construction failure. The corrected pressure shall be not less than .25 pounds per square inch gauge (psig) nor more than 2.0 psig. drawing 1521AS102. It shall inflate to its design shape in not more than 30 o 3.8.2 Pressur
41、e. The pressure in the life raft carbon dioxide chamber shall be not less than 4.75 psig, when inspected as specified in 4.8.3. shall remain perfectly intact. material failure in any respect. All the seams There shall be no evidence of construction or 3.8.3 Leakage. When tested as specified in 4.8.4
42、, 4.8.4.1, and 4.8.4.2, the pressure in the chamber being tested shall not be less than 1.60 psig. Ail the seams shall remain perfectly intact and there shall be no evidence of material or construction failure in any respect; nor shall there be any distortion or twisting of the chamber. shall operat
43、e without restriction to the flow of air and shall shut off the flow of air completely when released. The oral inflation valve when depressed 3.8.4 Weight of the life raft. When weighed as specified in 4.8.5, the life raft shall weigh not more than 4.2 pounds. 3.8.5 Strength of attachment of the man
44、ifold stem and the oral inflation assemblies. When tested as specified in 4.8.6, there shall be no evidence of material or construction failure in any respect. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-85824A 42 7979906 023b520 5 3.8.6
45、Thermal seam bonding. When inspected as specified in 4.8.7, the force required to separate each thermal seam specimen shall not be less than 40 pounds. 3.8.7 Extreme temperature. 3.8.7.1 At zero “Fahrenheit (minus eighteen “Celsius). When tested as specified in 4.8.8.1, the life raft shall inflate t
46、o design shape within twenty minutes. dioxide or restriction by any component or accessory. attachments shall remain perfectly intact and shall show no evidence of separation. There shall be no evidence of construction or material failure in any respect. Inflation shall be without any hindrance to t
47、he flow of carbon All the seams and cemented 3.8.7.2 At one hundred sixty “Fahrenheit (seventy one “Celsius). When tested as specified in 4.8.8.2, the life raft shall inflate to design shape within thirty seconds. carbon dioxide or restriction by any component or accessory. cemented attachments shal
48、l remain perfectly intact and shall show no evidence of separation. There shall be no evidence of construction or material failure in any respect. Inflation shall be without any hindrance to the flow of All the seams and 3.9 Visual examination and dimensions. When visually examined and dimensionally
49、 checked as specified in 4.8.1.1, the life raft and its components shall conform to this specification and applicable drawings. 3.10 Folding. The life raft shall be folded in accordance with drawing 1521AS200. The oral inflator assemblies shall lie flat and point in their proper directions. 3.11 Workmanship. After completion of the final assembly, the life raft shall be thoroughly cle.aned and all loose thread, lint, and foreign matter shall be removed. The metal
