1、- MIL-W-LS4bOC 40 9999906 0457671 2 m 4 f p = -_ _= - _ = - -_ - - - IINCH-POUND/ MIL-W-l9460C(SK) 7 November 1990 SUPERSEDING 8 November 1965 (See 6.5) MIL-W-l946OB(SHIPS) Wires per Size designation 1 Strands I strand MILITARY SPECIFICATION WIRE ROPE ASSEMBLIES, SINGLE LEG, GRAPNEL AND BUOY TYPE Th
2、is specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers grapnel and buoy rope assemblies. 1.2 Classification. Grapnel and buoy r
3、opes shall be furnished in the size designations shown in table I (see 6.2). TABLE I. Rope size desimations. Approximate diameter (inches) Grapnel 9 by 5 9 by 4 8 by 3 6 by 3 4 by 3 3 by 3 7 by 3 2-3/8 2 - 3/32 1 - 5/8 1 - 1/2 1-3/8 1-1/8 7/8 I- I Beneficial comments (recommendations, additions, del
4、etions) 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 20362-5101 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing a
5、t the end of this document or by letter. FSC 4010 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-u 5 is MIL-W-174bOC 40 7777706 0457b7Z 4 W MIL-W-l9460C(SH) 2. APPLICAB
6、LE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications. standards, and handbooks. The following specifications, 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 De
7、partment of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). I SPECIFICATIONS FEDERAL T-R-650 - Rope, Yarn and Twine, Bast Fiber. STANDARDS FEDERAL FED-STD-191 - Federal Standard for Textile Test Methods. MILITARY MIL-STD-163 - Steel
8、 Mill Products Prepared for Shipment and Storage. MIL-STD-271 - Requirements for Nondestructive Testing Methods. (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, BLDG. 4D, 700 Robbins Ave
9、nue, 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 documents which are DOD adopted are those listed in the issue of the DODISS cited in the solicitati
10、on. Unless otherwise specified, the issues of documents not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) General Application. (DoD adopted) and Steel Hardware. (DoD adopted) Zinc on Iron and Steel. Materia
11、ls. (DoD adopted) in. (51 nun) in thickness. (DoD adopted) A 27 - Standard Specification for Steel Castings, Carbon, for A 153 - Standard Specification for Zinc Coating (Hot-Dip) on Iron B 633 - Standard Specification for Electrodeposited Coatings of E 8 E 446 - Standard Reference Radiographs for St
12、eel Castings up to 2 (DoD adopted) - Standard Test Methods of Tension Testing of Metallic 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-(Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Stree
13、t, Philadelphia, PA 19103. ) (Non-Government 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.) 2.3 Order of precedence. In the event
14、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 and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified
15、(see 6.2), a sample shall be subjected t first article inspection (see 6.3) in accordance with 4.2.1. 3.2 General. Grapnel and buoy ropes shall be compound stranded, each strand containing full diameter, high tensile, zinc coated steel wires, with each wire separately covered with manila (Musa Texti
16、lis) yarn of a thickness as specified (see 3.3.5). 3.2.1 Length of roues. The grapnel and buoy ropes shall be furnished in single lengths of 600 feet (100 fathoms), 1200 feet (200 fathoms), and 3000 feet (500 fathoms), plus the amount required for the rope breaking test, unless otherwise specified (
17、see 6.2), without splices, welds, or joints of any kind. 3.2.2 End fittinm. Each length of grapnel and buoy rope shall be fitted, at each end, with an end link-thimble assembly, as shown on figures 1, 2, 3, 4 and 5. Both the link and thimble shall be zinc coated. The fittings shall be spliced into t
18、he rope by a loop or eye splice. The splice shall have at least three tucks with the whole strand, and two with half the wires cut from each strand, and laid under and over against the lay of the rope. neatly made, and both eye and splice shall be served with type IV, class 4, tarred hemp round line
19、 in accordance with T-R-650. The splice shall be tightly drawn, 3.3 Material. 3.3.1 Steel wires. The diameter of the finished, galvanized, steel wires shall be 0.106 shall withstand handling during shipment and storage, and shall be free from any area of paint or other coating. The coating shall be
20、not less than 0.7 ounce per square foot. 4. QUALITY ASSURANCE PROVISIONS 4.1 Resuonsibilitv for inspection. Unless 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. Exc
21、ept as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government, The Government reserves the right to perform any of the inspections
22、 set forth in the specification where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.1.1 Responsibilitv for compliance. All items shall mee
23、t 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 requirements in the specification shall not relieve the contractor of the responsibility of ensuring t
24、hat 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 ascertain conformance to requirements; however, this does not authorize submission of known
25、 defective material, either indicated or actual, nor does it commit the Government to accept defective material. The 4.2 Classification of inspection. The inspection requirements specified herein are classified as follows: (a) First article inspection (see 4.2.1). (b) Quality conformance inspection
26、(see 4.2.2). 4.2.1 First article inspection. The first article inspection shall be performed on one unit when a first article is required (see 3.1 and 6.2). inspection shall consist of the examination specified in 4.4 and the test specified in 4.5. The first article shall be a first production item
27、and shall be representative of the design, construction, and manufacturing technique applicable to the remaining units to be furnished under the contract. The 4.2.2 ualitv conformance inspection. The quality conformance inspection shall consist of the examination specified in 4.4 and the tests speci
28、fied in 4.5. 4.3 Sampling. A lot consists of units of the same size and construction offered for delivery at one time under one contract or order. inspection shall be selected from each lot in accordance with tables VI and VII. Samples for TABLE VI. Sampling for visual examination and testing - of t
29、he end item. Lot size 1 Sample size 2-8 9 - 15 16 - 25 26 - 50 51 - 90 91 - 150 151 - 280 281 - 500 501 - 1200 1201 - 3200 3201 - 10000 3 5 8 13 20 32 50 80 125 200 315 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE VII. Sampling for examina
30、tion of length. Lot size Sample size 1 - 10 11 - 500 501 - 3200 3201 - 10000 All 10 13 20 4.3.1 Sampling for examination. Sample units shall be selected at random from each lot in accordance with table VI and shall be O percent defective. 4.3.2 Sampling for testing. Sample units shall be selected at
31、 random from each lot in accordance with table VI and shall be O percent defective. Approxi- mately 30 feet or a specimen long enough for tests shall be taken from each sample uni t. 4.4 Examination. 4.4.1 End item for visual defects, Each of the sample units selected in accordance with 4.3.1 shall
32、be examined to verify conformance with the require- ments of 3.2.2 and 3.4 which do not involve tests. more defects shall be rejected. units, additional units shall be randomly selected as specified in the original sampling plan and if any defects are noted, the entire lot shall be rejected. Any sam
33、ple unit having one or If any defects are noted in the original sample 4.4.2 Length. - The sample unit for this examination shall be one reel. The sample size shall be as specified in table VII. The lot size shall be the number of units in the inspection lot. Defects shall be as specified in 4.4.2.1
34、. 4.4.2.1 Defects with regard to length shall be considered to exist if any of the following are determined during inspection: (a) Length of unit less than or more than length specified. (b) Length of unit less than marked on ticket. (c) Reels not in continuous length. 4.5 Test procedures. Each of t
35、he sample units selected in accordance with 4.3.2 shall be subjected to the tests specified in 4.5.1 through 4.5.8. sample unit fails the applicable test, the entire lot shall be rejected. If any 4.5.1 Determination of lav (pitch). 4.5.1.1 Specimen. The length of lay or pitch of rope, each strand, a
36、nd the yarns covering each wire, shall be made at the free end of the reel or coil, prior to splicing the outer link-thimble assembly. 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.5.1.2 Procedure. When measuring the lay there shall be no axial
37、 load on the rope. Beginning not less than 10 feet from the end of the rope, the length of five or more lays of the rope shall be measured, each strand, and the yarns covering each wire, pitches, IV. The distances measured shall be divided by the number of The average of these pitches shall not exce
38、ed that specified in table 4.5.2 Breaking strenEth - test of finished roDe. 4.5.2.1 Specimen. The sample length shall be seized at bo%h ends and subjected to the breaking strength test. 4.5.2.2 Procedure. The sample length shall be tested to destruction under surveillance of the Government inspector
39、. 4.5.2.3 The finished ropes shall have a breaking strength not less than that specified in table V for the applicable rope size designations. 4.5.3 Tests of link-thimble assemblies. 4.5.3.1 Radiographic tests. 4.5.3.1.1 The thimbles shall be subjected to radiographic examination specified in MIL-ST
40、D-271 and the following: 4.5.3.1.2 Radiographic examination shall be conducted on the first casting of a particular design. 4.5.3.1.3 When a number of castings are to be made from the same pattern or design by the same foundry, the amount of radiographic examination to be conducted on subsequent cas
41、tings of the same design may be reduced as the command or agency concerned or its authorized representative considers permissible, after examination of the radiographs from the first casting, provided the same foundry technique is used in producing the subsequent castings. 4.5.3.1.4 If, at any time
42、after the first casting is produced, the manufacturer elects to alter his foundry technique in order to eliminate defects revealed Ln the tirst or subsequent castings, the first casting submitted for inspection after such change shall be considered as a new “first casting“ and shall be subjected to
43、radiographic examination. 4.5.3.1.5 When the manufacturer has a number of orders for duplicate castings and employs the same foundry technique in their production, these castings may be considered as subsequent castings provided that not more than 6 months shall have elapsed between the completion o
44、f one order and the start of the succeeding order. manufacture of a succeeding order, the first casting of the new order shall be radiographed. Where more than 6 months have elapsed before starting the 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-
45、,-MIL-W-19460C 40 977770b 0457b0 3 * MIL-W-l9460C(SH) 4.5.3.1.6 Where a number of castings of the same design are produced by a standardized technique, the Government inspector shall select castings in accordance with 4.3.2 and shall subject the selected castings to radiographic inspection specified
46、 in MIL-STD-271. 4.5.3.1.7 Radiographic examination shall be conducted on the heat treated and on the rough machined casting. Where radiographic examination after rough machining will unduly delay completion of the contract, such examination may be made before machining provided that the surface of
47、the casting is sufficiently smooth and the cross section is sufficiently close to that of the rough machined casting that no internal defects are obscured and the sensitivity is equal to 2 percent of the rough machined dimensions. 4.5.3.2 Proof load tests. 4.5.3.2.1 The end links and thimbles shall
48、be tested to determine conformance with the proof load requirements specified in table II. 4.5.3.2.2 The number of end links and thimbles to be subjected to the proof load tests shall be the same as that specified for radiographic examination of thimbles (see 4.5.3.1.6). 4.5.3.3 If any end link or t
49、himble fails in the proof load test or is found defective in the radiographic test, all end links and thimbles of the same lot shall be subjected to the proof load test and the radiographic test. 4.5.4 Tests of steel wires. 4.5.4.1 Tensile and elongation. The tensile strength and elongation of the galvanized wires shall be determined in accordance with ASTM E 8 except that the speed of the pulling head of the testing machine during
