DNV OSS-101

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RULES FOR CLASSIFICATIONOF OFFSHORE DRILLINGAND SUPPORT UNITS

Transcript of DNV OSS-101

OFFSHORE SERVICE SPECIFICATION DNV-OSS-101

RULES FOR CLASSIFICATION OF OFFSHORE DRILLING AND SUPPORT UNITSAPRIL 2007

Since issued in print (April 2007), this booklet has been amended, latest in October 2007. See the reference to Amendments and Corrections on the next page.

DET NORSKE VERITAS

FOREWORDDET 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. DNV Offshore Codes consist of a three level hierarchy of documents: Offshore Service Specifications. Provide principles and procedures of DNV classification, certification, verification and consultancy services. Offshore Standards. Provide technical provisions and acceptance criteria for general use by the offshore industry as well as the technical basis for DNV offshore services. Recommended Practices. Provide proven technology and sound engineering practice as well as guidance for the higher level Offshore Service Specifications and Offshore Standards. DNV Offshore Codes are offered within the following areas: A) Qualification, Quality and Safety Methodology B) Materials Technology C) Structures D) Systems E) Special Facilities F) Pipelines and Risers G) Asset Operation H) Marine Operations J) Wind Turbines

Amendments and CorrectionsThis document is valid until superseded by a new revision. Minor amendments and corrections will be published in a separate document normally updated twice per year (April and October). For a complete listing of the changes, see the Amendments and Corrections document located at: http://webshop.dnv.com/global/, under category Offshore Codes. The electronic web-versions of the DNV Offshore Codes will be regularly updated to include these amendments and corrections.

Comments may be sent by e-mail to rules@dnv.com For subscription orders or information about subscription terms, please use distribution@dnv.com Comprehensive information about DNV services, research and publications can be found at http://www.dnv.com, or can be obtained from DNV,Veritasveien 1, NO-1322 Hvik, Norway; Tel +47 67 57 99 00, Fax +47 67 57 99 11.

Det Norske Veritas. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, including photocopying and recording, without the prior written consent of Det Norske Veritas. Computer Typesetting (FM+SGML) by Det Norske Veritas. Printed in Norway.

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.

Amended October 2007 see note on front cover

Offshore Service Specification DNV-OSS-101, April 2007 Changes Page 3

CHANGES IN THE RULES The present edition of the rules includes amendments and additions decided by the Executive Board in December 2006 and supersedes the October 2003 edition. The changes come into force 1 July 2007.

in accordance with DNV-RP-C206, see Ch.2 Sec.6 P. 2) Improved rules with respect to Towing, Emergency and Temporary Mooring, see Ch.3 Sec.4, new subsection K. 3) Improved rules with respect to Survey Of Mooring Equipment, see Ch.3 Sec.6 B 4) Text improved and aligned with the January 2007 version of the Rules for Classification of Ships. 5) Notations defined in the Rules for Classification of Ships which are relevant for MOUs, have been included.

Main changes General

These rules have been updated in line with IACS requirements (i.a. UR Z15, PR 1A, PR 19 Rev.3, Rec.39 and 44, QSCS and Ship and Repair - Quality std.) and feedback from the users on the previous issue. The main changes are described below: 1) A new voluntary, additional class notation, FMS (Fatigue Methodology for Ship-shaped Offshore Units), introduced for additional fatigue safety for offshore ships, performed

Corrections and Clarifications In addition to the above mentioned rule changes, a number of corrections and clarifications have been made to the existing rule text.

DET NORSKE VERITAS

Offshore Service Specification DNV-OSS-101, April 2007 Page 4 Changes

Amended October 2007 see note on front cover

DET NORSKE VERITAS

Amended October 2007 see note on front cover

Offshore Service Specification DNV-OSS-101, April 2007 Contents Page 5

CONTENTSCH. 1 Sec. 1A 100 A 200 A 300 B 100 B 200 C 100 C 200 C 300 D 100 D 200 E 100

PRINCIPLES AND PROCEDURES FOR CLASSIFICATION............................................ 11 Introduction......................................................... 13General............................................................................ 13 Organisation of DNV-OSS-101...................................... 13 Objects covered............................................................... 13 Verbal forms ................................................................... 13 Definitions ...................................................................... 13 Normative references...................................................... 14 DNV reference documents.............................................. 14 Other references.............................................................. 14 DNV informative references........................................... 15 Other references.............................................................. 15 General............................................................................ 15

A. Introduction .......................................................................... 13

A A A A A A B B B B B B B B B B

1300 1400 1500 1600 1700 1800 100 200 300 400 500 600 700 800 900 1000

Acceptance of control by national authorities ................ 23 Certificate of interim class.............................................. 23 Classification certificate ................................................. 23 Appendix to the classification certificate ....................... 23 Entry in the Register of vessels classed by DNV........ 23 Decline of application for classification ......................... 24 General............................................................................ 24 Periodical and renewal surveys ...................................... 24 Survey of damage ........................................................... 24 Repairs ............................................................................ 24 Procedures for maintenance............................................ 24 Conversions and alterations............................................ 24 Change of ownership ...................................................... 25 Conditions of class and memoranda ............................... 25 Survey reports and survey status .................................... 25 Rules and standards for newbuildings applicable for units in operation ............................................................ 25 Validity of the certificate ................................................ 25 Issuance of certificate ..................................................... 26 General............................................................................ 26 Suspension of class ......................................................... 26 Withdrawal of class ........................................................ 26 Reclassification............................................................... 26 Decisions taken by DNV ................................................ 27

B. Retention of Class.................................................................24

B. Definitions ............................................................................ 13

C. Normative References .......................................................... 14

D. Informative References......................................................... 15 C. Validity and Issuance of the Classification Certificate.........25C 100 C 200 D D D D 100 200 300 400

E. Abbreviations........................................................................ 15 D. Suspension and Withdrawal of Class ...................................26

Sec. 2A A A A A A A A 100 200 300 400 500 600 700 800

Classification Principles ..................................... 16Introduction..................................................................... 16 Entering into force and application of rules.................... 16 Basis for assignment of class .......................................... 16 Basis for maintenance of class........................................ 16 Documentation................................................................ 17 Disclosure of information ............................................... 17 Limitation of DNV's responsibility ................................ 17 Vertical contract audits and audits by national maritime authorities........................................................................ 17

A. The Classification Concept................................................... 16

E. Appeals ..........................................................