DNV Ship Rules Pt.5 Ch.1
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RULES FOR CLASSIFICATION OF SHIPS NEWBUILDINGS SPECIAL SERVICE AND TYPE ADDITIONAL CLASS PART 5 CHAPTER 1 SHIPS FOR NAVIGATION IN ICE JANUARY 2009 CONTENTS PAGE Sec. 1 General Requirements ................................................................................................................ 7 Sec. 2 Basic Ice Strengthening.............................................................................................................. 9 Sec. 3 Ice Strengthening for the Northern Baltic ................................................................................ 11 Sec. 4 Vessels for Arctic and Ice Breaking Service ........................................................................... 23 Sec. 5 Sealers ..................................................................................................................................... 39 Sec. 6 Winterization ............................................................................................................................ 40 Sec. 7 DAT(-X°C) ................................................................................................................................45 Sec. 8 IACS Unified Requirements For Polar Ships (Tentative Rules).............................................. 48 DET NORSKE VERITAS Veritasveien 1, NO-1322 Høvik, Norway Tel.: +47 67 57 99 00 Fax: +47 67 57 99 11 CHANGES IN THE RULES General Editorial changes taking effect immediately The present edition of the rules is a reprint of the July 2008 edition of • Sec.1 General Requirements the same chapter, but with the editorial changes described below. — Table A1 has been amended to include Polar Class. The changes take effect as indicated below. This chapter is valid until superseded by a revised chapter. Supple- • Sec.8 IACS Unified Requirements for Polar Ships (Tentative ments will not be issued except for an updated list of minor amend- Rules) ments and corrections presented in Pt.0 Ch.1 Sec.3. Pt.0 Ch.1 is — The section has been subjected to a number of typographical normally revised in January and July each year. corrections with respect to equations and corresponding sub- Revised chapters will be forwarded to all subscribers to the rules. scripts. Buyers of reprints are advised to check the updated list of rule chap- ters printed in Pt.0 Ch.1 Sec.1 to ensure that the chapter is current. Corrections and Clarifications In addition to the above stated rule requirements, a number of correc- tions and clarifications have been made in the existing rule text. 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Rules for Ships, January 2009 Pt.5 Ch.1 Contents – Page 3 CONTENTS SEC. 1 GENERAL REQUIREMENTS .......................... 7 H. Special Arrangement and Strengthening Forward............................................................................... 16 A. Classification..........................................................................7 H 100 Stem, baltic ice strengthening.........................................16 A 100 Application........................................................................7 H 200 Arrangements for towing ................................................16 A 200 Class notations ..................................................................7 I. Special Arrangement and Strengthening Aft .................. 17 B. Definitions..............................................................................7 I 100 Stern ................................................................................17 B 100 Symbols.............................................................................7 I 200 Rudder and steering arrangements .................................17 B 200 Upper (UIWL) and Lower (LIWL) Ice Waterlines .........................................................................7 J. Propulsion Machinery ....................................................... 17 J 100 Engine output..................................................................17 C. Documentation ......................................................................7 J 200 Design loads for propeller and shafting..........................19 C 100 General..............................................................................7 J 300 Propeller..........................................................................19 J 400 Propulsion shaft line reinforcement................................20 D. Marking and on Board Documentation..............................7 J 500 Thrusters .........................................................................21 D 100 General..............................................................................7 K. Miscellaneous Machinery Requirements ......................... 21 SEC. 2 BASIC ICE STRENGTHENING ....................... 9 K 100 Starting arrangements .....................................................21 K 200 Sea inlet and cooling water systems ...............................21 A. General...................................................................................9 K 300 Ballast system .................................................................22 A 100 Classification.....................................................................9 SEC. 4 VESSELS FOR ARCTIC AND ICE B. Structural Requirements BREAKING SERVICE ..................................... 23 for the Class Notation ICE-C................................................9 B 100 General..............................................................................9 A. General................................................................................ 23 B 200 Plating ...............................................................................9 A 100 Classification ..................................................................23 B 300 Framing .............................................................................9 A 200 Scope...............................................................................23 B 400 Stringers and web frames..................................................9 A 300 Design principles and assumptions.................................23 B 500 Weld connections..............................................................9 A 400 Definitions.......................................................................23 B 600 Rudder and steering arrangement .....................................9 A 500 Documentation................................................................24 B 700 Stem ..................................................................................9 C. Machinery..............................................................................9 B. Materials and Corrosion Protection................................. 25 C 100 Output of propulsion machinery .......................................9 B 100 Design temperatures........................................................25 C 200 Design of propeller and propeller shaft ............................9 B 200 Selection of steel grades..................................................25 C 300 Sea suctions and discharges ..............................................9 B 300 Coatings ..........................................................................25 B 400 Corrosion additions.........................................................25 D. Requirements for the Class Notation ICE-E .....................10 D 100 General............................................................................10 C. Ship Design and Arrangement.......................................... 25 D 200 Plating .............................................................................10 C 100 Hull form.........................................................................25 D 300 Framing ...........................................................................10 C 200 Appendages.....................................................................26 D 400 Stem ................................................................................10 C 300 Mooring equipment.........................................................26 SEC. 3 ICE STRENGTHENING FOR THE D. Design Loads ...................................................................... 26 D 100 Ice impact forces on the bow ..........................................26 NORTHERN BALTIC ....................................... 11 D 200 Beaching forces...............................................................26 A. General.................................................................................11 D 300 Ice compression loads amidships....................................26 A 100 Classification...................................................................11