1、MIL-R-2404B 40 W 06 0484483 4 14 June 1991 SUPERSEDING 28 March 1966 (See 6.10) MIL-R-24049A MILITARY SPECIFICATION ROPE, POLYPROPYLENE This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers one type of polyp
2、ropylene rope. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications. standards, and handbooks. 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 l
3、isted in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS FEDERAL UU-T-81 - Tags, Shipping and Stock. PPP-F-320 - Fiberboard; Corrugated and Solid, Sheet Stock (Container Grade), and Cut
4、Shapes. MI LI TARY MIL-(3-3131 - Cordage; Packaging of. MIL-L-17331 - Lubricating Oil, Steam Turbine and Gear, Moderate MIL-L-19140 - Lumber and Plywood, Fire-Retardant Treated. Service. I I Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in imp
5、roving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 5523, Department of the Navy, Washington, DC 20362-5101 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 402
6、0 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-24049B STANDARDS FEDERAL FED-STD-191 - Textile Test Methods, FED-STD-595 - Colors Used in Government Procurement
7、. (Unless otherwise indicated, copies of federal and military specifications, standards, and 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 th
8、is document to the extent specified herein. Unless otherwise specified, the issues of the documents 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 document
9、s cited in the solicitation (see 6.2). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) and Industrial Filament Yarns Made from Man-Made Organic- Base Fibers. (DoD adopted) Plastics. (DoD adopted) Fibers. (DoD adopted) D 885 - Standard Method of Testing Tire Cords, Tire Cord Fabrics, D 1141 - Stand
10、ard Specification for Substitute Ocean Water. D 1525 - Standard Test Method for Vicat Softening Temperature of D 1577 - Standard Test Methods for Linear Density of Textile D 2257 - Standard Test Method for Extractable Matter in Textiles. D 2258 - Standard Practice for Sampling Yarns for Testing. (Ap
11、plication for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103-1187.) (Non-Government standards and other publications are normally available from the organizations that prepare or distribute the documents. These documents also ma
12、y be available in or through libraries or other informational services.) 2.3 Order of precedence. In the event of a conflict 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 an
13、d 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 material used in the rope shall be virgin, continuous monofilament pol
14、ypropylene fiber of at least 6.0 grams per denier tenacity and shall range in size from 100 to 600 denier per filament (see 6.3). The material shall have a softening point of 300 degrees Fahrenheit (OF) and a specific gravity not greater than 0.91. All fibers shall contain sufficient heat stabilizer
15、s to meet the softening point requirements when tested as specified in 4.6.12. O 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-.- *- s. MIL-R-24049B 40 9999906 04B4485 B MIL-R-24049B 3.2.1 Ultraviolet resistance. The polypropylene fibers shall co
16、ntain sufficient ultraviolet stabilizers to meet the requirements when tested as specified in 4.6.11. strength loss not greater than 50 percent when compared with the original specimens. The specimens removed from the rope shall have a breaking 3.3 Construction. The ropes shall be of three strands.
17、Each strand shall be made of one size yarn and shall have a sufficient number of yarns to produce a rope conforming to the requirements of this specification (see 6.3). The lay of the rope shall be right-hand or “Z“ lay. 3.3.1 Phvsical properties. The physical properties of the finished rope shall b
18、e as specified in table I. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-u d a MIL-R-24049B 000000000000000000000000 Nmddoco00m000000000000000 wdwdwoomdommNco4cocoooooo mmmmmmmmmmmooooooooooooo NNNNNNNNNNNNN 4 o Provided by IHSNot for ResaleNo re
19、production or networking permitted without license from IHS-,-,-MIL-R-24049B 40 W 9999906 0484487 1 W MIL-R-24049B 3.3.1.1 ElonEation. The elongation at the breaking strength shall not be The load elongation curve drawn autographically shall greater than 45 percent. not exhibit evidence of sudden ch
20、anges in load applications greater than 5 percent of the load weighed at the instant of change. shall not be considered in this determination. Changes due to splice slippage 3.3.1.2 Hardness. The furnished rope shall meet the minimum hardness specified in table I (see 4.6.13). 3.3.2 Identification t
21、icket. Each reel or spool of rope shall have a ticket, identification tag, or label attached to it. The ticket shall be in accordance with type B, class 1, size 4 or 5, 15 CSU grade designator of W-T-81. The ticket shall be legibly printed, stamped, or typed with water insoluble ink. The ticket shal
22、l contain the following information: Stock number Nomenclature Specification Length Contract number and date Year of manufacture Contractors name 3.3.3 Identification marker. The manufacturer shall identify his product by inserting a kraft paper or water repellent cotton marker within one strand and
23、 completely enveloped by the cover yarns of that strand in all ropes larger than 1- 1/4 inches circumference. Unless otherwise specified (see 6.2), the manufac- turers name, year of manufacture, and type of fiber (Polypropylene) shall be printed on the marker in bold, easily-read type. be used. when
24、 tested. Italic or script type shall not The printing shall not be affected upon exposure to water or mineral oil 3.3.4 Extraneous material. No extraneous material shall be added for the purpose of weighing the rope, except coloring pigments which are permissible. The extractable matter shall not be
25、 greater than 3.0 percent (see 4.6.6). 3.3.5 Moisture content. The moisture content of the rope shall not be greater than 1.0 (see 4.6.9). 3.3.6 Heat aginq. The finishing materials shall be resistant to aging and shall cause rope strength loss not greater than 10 percent when tested (see 4.6.10). 3.
26、3.7 Spliceabilitv. The finished ropes shall be spliceable and shall not develop yarn displacement or strand cockles (distortion formed by a back twist in the strand) in the splicing test (see 4.6.7). 3.3.8 Color. Unless otherwise specified, the color of the finished rope shall be black. When colored
27、 rope other than black is specified (see 6.2). Pigments shall be added to the polymer at the extruder to give the suitable color in accordance with FED-STD-595. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.3.9 Matching. The shade of the finish
28、ed rope shall match the standard sample under natural (north sky) daylight or artificial daylight having a color temperature of 7500 degrees Kelvin and shall be a good approximation to the standard sample under incandescent lamplight at 2800“ Kelvin. 3.3.10 Colorfastness. The finished rope shall sho
29、w fastness to weathering equal to or better than the standard sample when tested as specified in 4.6. When no standard sample has been established, the colored rope shall show good fastness to weathering when tested in accordance with FED-STD-191. 3.3.11 Put-up. Unless otherwise specified, the rope
30、shall be furnished on non returnable reels not larger than 6 feet in diameter in the lengths specified in table II. Broken lengths will be permitted, but no piece shall be less than 600 feet when measured in the relaxed condition (see 6.2). The ends of all rope shall be cut off squarely and be secur
31、ely whipped or taped to prevent untwisting or fraying. The reels shall be wound so that each turn and layer is free from entanglement. A plus tolerance of 10.0 percent shall be allowed on the length specified per reel or spool. TABLE II. Put UD. Circumference (inches) 5/8 3/4 1 1-1/8 1 - 1/4 1 - 3/4
32、 2 2 - 1/4 2 - 3/4 3 3 - 1/2 4 4-1/2 5 5 - 1/2 6 6 - 1/2 7 8 9 10 1 - 1/2 2 - 1/2 3 - 3/4 Minimum length (feet) 2,250 2 , 250 2,250 1,620 1,200 1,200 1,200 1 , 200 1 , 200 1 , 200 1,200 1 , 200 1,200 600 600 600 600 600 600 600 600 600 600 600 Weight per reel ( p ounds ) 20 28 50 47 42 60 80 105 138
33、 165 198 242 332 191 216 276 332 389 500 563 700 900 1 , 156 1 , 465 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-/- 2,. MIL-R-24049B 40 9999906 0484489 5 .=. I MIL-R-24049B 4. QUALITY ASSURANCE PROVISIONS 4.1 ResDonsibilitv for inspection. Unle
34、ss otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements (examinations and tests) as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facili
35、ties suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. ment reserves the right to perform any of the inspections set forth in this specification where such inspections are deemed necessary to ensure supplies and services conform to pr
36、escribed requirements. The Govern- 4.1.1 ResDonsibilitv for compliance. All items shall meet all requirements of sections 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall inspection system or quality program. absence of any inspection requirement
37、s in the specification shall not relieve the contractor of the responsibility of ensuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling inspection, as part of the manufacturing operations, is an acceptable practice to
38、ascertain conformance to requirements, however, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to accept defective material. The 4.2 Classification of inspections. The inspection requirements specified herein are classifi
39、ed as follows: (a) First article inspection (see 4.3). (b) Quality conformance inspection (see 4.4). 4.3 First article inspection. First article inspection shall consist of the examinations specified in 4.5.1 and the tests specified in 4.6. 4.3.1 First article sample. The first article sample for ro
40、pes shall be a continuous finished length of 70 feet. 4.4 Quality conformance inspection. Quality conformance inspection shall consist of the examinations specified in 4.5 and the tests specified in 4.4.1 and 4.6 (see 6.3). 4.4.1 Material and component inspection, Determination shall be made for all
41、 characteristics specified in table III, except material. per filament and the tenacity of the fiber shall be determined in accordance with ASTM D 885, D 1577 and D 2258. The linear density Results shall be either pass or fail. 4.4.2 m. For purpose of inspection sampling a lot shall consist of all r
42、eels of rope produced in one facility, using the same materials and production processes, and being offered for delivery at one time. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-24049B 40 9999906 0484490 L MIL-R-24049B TABLE III. Componen
43、t testing. Characteristics Requirement Mat er ia1 3.2 Denier per filament 3.2 Tenacity 3.2 Direction of twist (strand) 3.3 4.5 Examinations. 4.5.1 Examination of the end item for visual defects. A lot size for examination for visual defects specified in table IV shall be expressed in units of reels,
44、 each. Ten percent of the gross length contained on each sample unit, but not less than 100 feet shall be subjected to the visual examination. The inspection level shall be as specified in table VI. Any sample unit having one or more defects specified in table IV shall be rejected. If any defects ar
45、e noted in the original sample units, additional units shall be randomly selected and if any defects specified in table IV are noted the entire lot shall be rejected. TABLE IV. Visual examination defects. Examine 4ppearance and workmanship Cdentification marker 2/ Defect Cut, chafed or damaged, affe
46、cting serviceability Kinks, darting yarns L/ broken or loose ends, bulged strands, strand knots Other than 3 strands Ends not cut off squarely Ends not securely whipped or taped Proj ecting ends Omitted incorrect illegible Italic or script type used See footnotes at end of table. a Provided by IHSNo
47、t for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-24049B 40 9999906 0484491 3 m Lot size MIL-R-24049B Sample size TABLE IV. Visual examination defects - Continued. Examine Identification ticket label Color Cleannes s Defect Not completely covered by cover yarns N
48、ot as specified Omitted, incorrect, illegible, insecurely attached Not as specified Handwritten entries Not as specified Specific shade, not within established tolerances Spot, or stain, clearly noticeable 3/ Objectionable odor - i/ Darting yarns are internal yarns which project through the cover -
49、2/ Identification marker for larger than 1-1/4 inch circumference. - 3/ At normal inspection distance (approximately 3 feet). yarns of the strand at intervals along the rope. 4.5.2 Examination for length and winding. The sample unit for this examination shall be one reel. The inspection level shall be as specified in table V, and the presence of any defect shall be cause for rejection of the entire lot. The lot si
