1、Designation: F2935 12An American National StandardStandard Specification forChocks, Panama, Mooring Cast Steel1This standard is issued under the fixed designation F2935; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of l
2、ast revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the principal dimensions andmaterials of chocks installed in ships to comply with theregulati
3、ons of the Panama Canal.1.2 Chocks can be used with either wire rope or fiber andsynthetic ropes.1.3 Chocks are for mounting directly on a deck, seat(foundation) or for mounting in a bulwark.1.4 To meet Panama Canal Company regulations the radiusof contact surfaces of lines must be 180 mm.1.5 The va
4、lues stated in SI units are to be regarded as thestandard.2. Referenced Documents2.1 ASTM Standards:2A27/A27M Specification for Steel Castings, Carbon, forGeneral Application2.2 ANSI Standard:3B 46.1 Surface Texture3. Descriptions of Terms Specific to This Standard3.1 bulwarka structural enclosure a
5、long the edge of theship to serve as a rail.3.2 closed chocka metal flared ring-like fitting mountedon a ship through which mooring lines pass to tow or moor aship.3.3 mooring ring or pipea chock mounted in the bulwarkand conforming to Type II or IV.3.4 rope contact areathat part of the fitting in c
6、ontact withthe mooring line in normal mooring operations.4. Classification4.1 The size of the chock shall be identified by the nominalsize “L” and “H” of the opening as shown in Table 1 and Fig.1, and Table 2 and Fig. 2. Sizes larger than 360 mm by 260 mmmay be considered as double chocks.4.2 Chocks
7、 are furnished in types as follows:4.2.1 Type IDeck mounted, as shown in Fig. 1, andconforms to all dimensions in Table 1.4.2.2 Type IIBulwark mounted, as shown in Fig. 2, andconforms to all dimensions in Table 2.4.2.3 Type IIIDeck mounted conforming only to dimen-sions “L”, “H”, and 180 mm radius a
8、t entrance, as shown inFig. 1 and Table 1 and the requirements of Sections 6-10.4.2.4 Type IVBulwark mounted conforming only to di-mensions “L”, “H”, and 180 mm radius at entrance, as shownin Fig. 2 and Table 2 and the requirements of Sections 6 to 10.4.3 Chocks shall be furnished in either of the f
9、ollowinggrades:4.3.1 Grade 1Surface finish shall be in the as castcondition.4.3.2 Grade 2Surface finish in way of rope contact shallbe in accordance with 7.2.5. Ordering Information5.1 Orders for chocks under this specification shall includethis standard date, and the following:5.1.1 Quantity (numbe
10、r) of chocks required,5.1.2 Size (opening, L 3 H),5.1.3 Type and grade,5.1.4 Primer and coating, if any (see 7.3), and5.1.5 Marking.6. Materials and Manufacture6.1 Material shall be cast steel in accordance with Specifi-cation A27/A27M, Grade 60-30.6.2 For Types III and IV the manufacturer shall cer
11、tify thatchock is in compliance with Panama Canal requirements.6.3 Casting shall be smooth, fine grain, and free of cracks,hot tears, and blow holes, detrimental to end use. Defectshaving an area larger than 25 by 25 mm2and a depth of morethan 10 % of the thickness in way thereof will be cause forre
12、jection. Small defects in way of rope contact shall be weldedand finished smooth. Where applicable, welding shall be inaccordance with code requirements, such as ABS, AWS and soon, and may require post weld heat treatment (PWHT).6.4 All excess material, vents, and gates shall be removedand finished
13、smooth to match the surrounding surface.1This specification is under the jurisdiction of ASTM Committee F25 on Shipsand Marine Technology and is the direct responsibility of Subcommittee F25.01 onStructures.Current edition approved Jan. 1, 2012. Published February 2012. DOI:10.1520/F2935-12.2For ref
14、erenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 4
15、3rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.5 Limber or drain holes shall be 25 mm in diameter andprovided in webs and brackets to prevent water entrapment.6.6 Type I sh
16、all be in accordance with Fig. 1 and Table 1.6.7 Type II shall be in accordance with Fig. 2 and Table 2.7. Workmanship, Finish, and Appearance7.1 Casting shall be sand, grit, or shot blasted to a graymetal finish to remove all loose scale. All mold flashing shallbe removed and radii shall be fair so
17、 as to present an evensurface.7.2 Surface of Grade 2 chocks shall have a rope contactsurface of average surface roughness of 3 m or less, inaccordance withANSI standard B 46.1 so as to reduce abrasivedamage to fiber and synthetic ropes.7.3 The manufacturer shall provide additional surfacepreparation
18、 and coating as specified by the ordering informa-tion. In the absence of such requirements, surface preparationshall remain as required by 7.1.TABLE 1 Dimension Requirements (see Fig. 1)(Unit: mm)Nominal size L l1l2l3l4HH1H2RR1R2310 310 708 688 105 310 260 639 543 130 329 233360 360 760 740 130 360
19、 260 640 545 130 330 235Nominal size R3R4R5TDWelding leg length SWLCalculated weight (kg)z1kN tonnes310 142 140 195 32 38 8 471 48 257360 140 138 192 34 40 8.5 687 70 286NOTE 1All fillet radii to be equal to “T”.NOTE 2All final products must have a thickness no less than “T”.FIG. 1 Configuration of
20、Deck Mounted ChocksTABLE 2 Dimension Requirements (see Fig. 2)(Unit: mm)Nominal size L l1l2HH1H2RR1R2R3R4310 310 720 688 260 670 453 130 335 227 149 147360 360 770 733 260 670 456 130 335 228.5 147 145Nominal size R5TD1u Welding leg length SWLCalculated weight (kg)z1z2kN tonnes310 205 25 31 44 12.5
21、10 726 70 228360 203 27 33 43 13.5 11 814 79 248F2935 1228. Inspection8.1 The manufacturer shall visually inspect the chock fordimensions, workmanship, finish, and appearance after thepreparation required by 7.1 to ascertain that it meets the intentof this specification.9. Product Marking9.1 Each ch
22、ock shall be marked with purchase order, itemnumber, and stamped on the top exposed web using letters atleast 12 mm high designating the ASTM standard number,type, and grade. Other marking may be in paint or a waterprooftag.10. Packaging and Package Marking10.1 If shipment is required, chocks shall
23、be crated orattached to a pallet in a manner acceptable for shipment by acommon carrier.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of
24、 the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn.
25、Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comme
26、nts have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or m
27、ultiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).NOTE 1All fillet radii to be equal to “t”.NOTE 2All final products must have a thickness no less than “T”.FIG. 2 Configuration of Bulwark Mounted ChocksF2935 123
