1、Designation: F2935 12 (Reapproved 2018)1An 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 revi
2、sion, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1NOTEKeywords section was editorially added in March 2018.1. Scope1.1 This specification covers the principal di
3、mensions andmaterials of chocks installed in ships to comply with theregulations 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
4、 regulations the radiusof contact surfaces of lines must be 180 mm.1.5 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.6 This international standard was developed in accor-dance with internationally recognized principles on st
5、andard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A27/A27M Specification for Steel Castings,
6、Carbon, forGeneral Application2.2 ANSI Standards:3B 46.1 Surface Texture3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 bulwarka structural enclosure along the edge of theship to serve as a rail.3.1.2 closed chocka metal flared ring-like fitting mountedon a ship through which
7、mooring lines pass to tow or moor aship.3.1.3 mooring ring or pipea chock mounted in the bul-wark and conforming to Type II or IV.3.1.4 rope contact areathat part of the fitting in contactwith the mooring line in normal mooring operations.4. Classification4.1 The size of the chock shall be identifie
8、d 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 are furnished in types as follows:4.2.1 Type IDeck mounted, as shown in Fig. 1, andconforms to all dimensions in Tabl
9、e 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 at entrance, as shown inFig. 1 and Table 1 and the requirements of Sections 610.4.2.4 Type IVBulwark mounted conforming
10、 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 followinggrades:4.3.1 Grade 1Surface finish shall be in the as castcondition.4.3.2 Grade 2Surface finish in way of rope
11、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 (number) of chocks required,5.1.2 Size (opening, LH),5.1.3 Type and grade,5.1.4 Primer and coating, if any (see 7.3), and5.1.
12、5 Marking.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 March 1, 2018. Published April 2018. Originallyapproved in 2012. Last previous edition approved in
13、 2012 as F2935 12.DOI:10.1520/F2935-12R18E01.2For referenced 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
14、American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally
15、 recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.16. Materials and Manufacture6.1 Material shall be cast ste
16、el in accordance with Specifi-cation A27/A27M, Grade 6030.6.2 For Types III and IV the manufacturer shall certify 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
17、area larger than 25 by 25 mm2and a depth of morethan 10 % of the thickness in way thereof will be cause forrejection. 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 re
18、quire post weld heat treatment (PWHT).6.4 All excess material, vents, and gates shall be removedand finished smooth to match the surrounding surface.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 shall be in accordance wit
19、h Fig. 1 and Table 1.6.7 Type II shall be in accordance with Fig. 2 and Table 2.TABLE 1 Dimension Requirements (see Fig. 1)(Unit: mm)Nominal size L l1l2l3l4HH1H2RR1R2310 310 708 688 105 310 260 639 543 130 329 233360 360 760 740 130 360 260 640 545 130 330 235Nominal size R3R4R5TDWelding leg length
20、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 Deck Mounted ChocksTABLE 2 Dimension Requirements (see Fig. 2)(U
21、nit: 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 R5TD1 Welding leg length SWLCalculated weight (kg)z1z2kN tonnes310 205 25 31 44 12.5 10 726 70 228360 203 27 33 43 13.5 11 814 79 248F2935 12 (2018)12
22、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 as to present an evensurface.7.2 Surface of Grade 2 chocks shall have a rope contactsurface of average
23、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 and coating as specified by the ordering informa-tion. In the absence of such requirements, surface pre
24、parationshall remain as required by 7.1.8. 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 chock shall be mark
25、ed 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 be crated orattac
26、hed to a pallet in a manner acceptable for shipment by acommon carrier.11. Keywords11.1 castings; chocks; mooring; Panama chocks; shipbuild-ing; shipsNOTE 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 Choc
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31、t 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 Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 12 (2018)14
