DNV Ice Rules

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Ice Class Rules by DNV. In effect since Jan 1, 2012.

Transcript of DNV Ice Rules

RULES FOR CLASSIFICATION OFDET NORSKE VERITAS ASThe content of this service document is the subject of intellectual property rights reserved by Det Norske Veritas AS (DNV). The useraccepts that it is prohibited by anyone else but DNV and/or its licensees to offer and/or perform classification, certification and/orverification services, including the issuance of certificates and/or declarations of conformity, wholly or partly, on the basis of and/orpursuant to this document whether free of charge or chargeable, without DNV's prior written consent. DNV is not responsible for theconsequences arising from any use of this document by others.ShipsPART 5 CHAPTER 1NEWBUILDINGSSPECIAL SERVICE AND TYPE ADDITIONAL CLASSShips for Navigation in IceJULY 2011FOREWORDDET NORSKE VERITAS (DNV) is an autonomous and independent foundation with the objectives of safeguarding life,property and the environment, at sea and onshore. DNV undertakes classification, certification, and other verification andconsultancy services relating to quality of ships, offshore units and installations, and onshore industries worldwide, andcarries out research in relation to these functions.The Rules lay down technical and procedural requirements related to obtaining and retaining a Class Certificate. It is usedas a contractual document and includes both requirements and acceptance criteria.The electronic pdf version of this document found through http://www.dnv.com is the officially binding version Det Norske Veritas AS July 2011Any comments may be sent by e-mail to rules@dnv.comFor subscription orders or information about subscription terms, please use distribution@dnv.comComputer Typesetting (Adobe Frame Maker) by Det Norske VeritasIf any person suffers loss or damage which is proved to have been caused by any negligent act or omission of Det Norske Veritas, then Det Norske Veritas shall pay compensation tosuch person for his proved direct loss or damage. However, the compensation shall not exceed an amount equal to ten times the fee charged for the service in question, provided thatthe maximum compensation shall never exceed USD 2 million.In this provision "Det Norske Veritas" shall mean the Foundation Det Norske Veritas as well as all its subsidiaries, directors, officers, employees, agents and any other acting on behalfof Det Norske Veritas.Rules for Ships, July 2011Pt.5 Ch.1 Changes Page 3DET NORSKE VERITAS ASCHANGESGeneralThe present edition of the rules includes additions and amendments approved by the Executive Committee as of June 2011and supersedes the January 2011 edition of the same chapter.The rule changes come into force as indicated below.Text affected by the main rule changes is highlighted in red colour in the electronic pdf version. However, where thechanges involve a whole chapter, section or sub-section, only the title may be in red colour.This chapter is valid until superseded by a revised chapter.Main changes coming into force 1 January 2012 Sec.1 General Requirements D102: Marking also by welding seam to be accepted. E101: Highlighting IACS rule requirement of Material Grade B for ice strengthened ships. E102: Other materials shall be considered by class. Sec.2 Basic Ice Strengthening B101: Ice belt extension for ICE-C changed from 0.5 to 0.4 m above UIWL. Sec.3 Ice Strengthening for the Northern Baltic A204: Procedure and acceptance criteria for Direct Analysis. A206: Definition of span and spacing. A207: Reference to definition of effective breadth. A208: Reference to definition of members not normal to the plating. B201: Change in pressure formulation, parameter ca. C101: Change in vertical extension of the ice strengthening for plates below LIWL. D101: Change in vertical extension of the ice framing below LIWL. D101: New shear requirement for transverse frames. D301: Change in formula due to change in pressure formulation, ref. B201. Change in m-factor. D402: Item 2 aligned with FIN/SWE Ice Class Rules. Item 3 updated according to FIN/SWE Ice Class Rules. E101, E201 and F101: Formulas updated due to change in pressure formulation, ref. B201. G100: In the FIN/SWE Ice Class Rules, the text has been moved to the FIN/SWE Guidelines. DNV kept general req.to Bilge Keel, and spec. req. to ICE-1A*F. H200: In the FIN/SWE Ice Class Rules, the text has been moved to the FIN/SWE Guidelines. General towingrequirement remains. I100: In the FIN/SWE Ice Class Rules, text related to Transom moved to the FIN/SWE Guidelines. General towingrequirement remains. I205: Specification of pressure used on the rudder. Sec.4 Vessels for Arctic and Ice Breaking Service Added length limitation for stability requirements in Sub-section L. Sec.6 Winterization C300: Ice Class not to be a requirement for having WINTERIZED COLD Notation (previous item C301 deleted). C600: Requirements better specified. D200: For Winterized Arctic, Ice Class according to Sec.3 also accepted. Sec.7 DAT(-XC) A301: Distance changed from 0.5 m to 0.6 m to align with PC. A302: Text description of extreme low temp. changed to Guidance Note. B101: Updated to align w/ 1A1 requirement. B101 Table B1: Updated in line with Pt.3 Ch.1 (Table B2, C3) and UR S6. B201: Item related to Cranes deleted, not relevant for DAT. B202: Requirement for impact test deleted, and reference made to impact test requirement in Sec.6 C605. Sec.8 Polar Class Ice compression load added as a load to be checked according to Sec.4. Revision of IACS URI2, Rev.2 Nov.2010 (typographical errors corrected.)Corrections and ClarificationsIn addition to the above stated rule requirements, a number of corrections and clarifications have been made in the existingrule text.Rules for Ships, July 2011 Pt.5 Ch.1 Contents Page 4 DET NORSKE VERITAS ASCONTENTSSec. 1 General Requirements ....................................................................................................................... 9A. Classification.................................................................................................................................................................. 9A 100 Application............................................................................................................................................................ 9A 200 Class notations ...................................................................................................................................................... 9B. Definitions ...................................................................................................................................................................... 9B 100 Symbols ................................................................................................................................................................ 9B 200 Upper (UIWL) and Lower (LIWL) Ice Waterlines ............................................................................................ 10C. Documentation ............................................................................................................................................................ 10C 100 General ................................................................................................................................................................ 10D. Marking and on Board Documentation.................................................................................................................... 10D 100 General ................................................................................................................................................................ 10E. Materials ...................................................................................................................................................................... 11E 100 General ................................................................................................................................................................ 11Sec. 2 Basic Ice Strengthening ................................................................................................................... 12A. General ......................................................................................................................................................................... 12A 100 Classification ...................................................................................................................................................... 12B. Structural Requirements for the Class Notation ICE-C.......................................................................................... 12B 100 General ................................................................................................................................................................ 12B 200 Plating ................................................................................................................................................................. 12B 300 Framing............................................................................................................................................................... 12B 400 Stringers and web frames.................................................................................................................................... 12B 500 Weld connections................................................................................................................................................ 12B 600 Rudder and steering arrangement ....................................................................................................................... 12B 700 Stem.................................................................................................................................................................... 12C. Machinery....................................................................................