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DNV Ship Rules Pt.5 Ch.1

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DNV Ship Rules Pt.5 Ch.1 RULES FOR CLASSIFICATION OF Ships PART 5 CHAPTER 1 NEWBUILDINGS SPECIAL SERVICE AND TYPE – ADDITIONAL CLASS Ships for Navigation in Ice JULY 2011 The content of this service document is the subject of intellectual property rights reserved by Det Norske Veritas AS (DNV). The user accepts that it is prohibited by anyone else but DNV and/or its licensees to offer and/or perform classification, certification and/or verification services, including the issuance of certificates and/or declarations of conformity, wholly or partly, on the basis of and/or pursuant to this document whether free of charge or chargeable, without DNV's prior written consent. DNV is not responsible for the consequences arising from any use of this document by others. DET NORSKE VERITAS AS FOREWORD DET 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 and consultancy services relating to quality of ships, offshore units and installations, and onshore industries worldwide, and carries 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 used as 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 2011 Any comments may be sent by e-mail to [email protected] For subscription orders or information about subscription terms, please use [email protected] Computer Typesetting (Adobe Frame Maker) by Det Norske Veritas If 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 to such 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 that the 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 behalf of Det Norske Veritas. Rules for Ships, July 2011 Pt.5 Ch.1 Changes – Page 3 CHANGES General The present edition of the rules includes additions and amendments approved by the Executive Committee as of June 2011 and 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 the changes 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 towing requirement remains. — I100: In the FIN/SWE Ice Class Rules, text related to “Transom” moved to the FIN/SWE Guidelines. General towing requirement 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(-X°C) — 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 Clarifications In addition to the above stated rule requirements, a number of corrections and clarifications have been made in the existing rule text. DET NORSKE VERITAS AS Rules for Ships, July 2011 Pt.5 Ch.1 Contents – Page 4 CONTENTS Sec. 1 General Requirements ....................................................................................................................... 9 A. Classification.................................................................................................................................................................. 9 A 100 Application............................................................................................................................................................ 9 A 200 Class notations ...................................................................................................................................................... 9 B. Definitions ...................................................................................................................................................................... 9 B 100 Symbols ................................................................................................................................................................ 9 B 200 Upper (UIWL) and Lower (LIWL) Ice Waterlines ............................................................................................ 10 C. Documentation ............................................................................................................................................................ 10 C 100 General................................................................................................................................................................ 10 D. Marking and on Board Documentation.................................................................................................................... 10 D 100 General................................................................................................................................................................ 10 E. Materials ...................................................................................................................................................................... 11 E 100 General................................................................................................................................................................ 11 Sec. 2 Basic Ice Strengthening ................................................................................................................... 12 A. General......................................................................................................................................................................... 12 A 100 Classification ...................................................................................................................................................... 12 B. Structural Requirements for the Class Notation ICE-C.......................................................................................... 12 B 100 General................................................................................................................................................................ 12 B 200 Plating ................................................................................................................................................................. 12 B 300 Framing............................................................................................................................................................... 12 B 400 Stringers and web frames.................................................................................................................................... 12 B 500 Weld connections...............................................................................................................................................
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