RULES FOR CLASSIFICATION Offshore units DNVGL-RU-OU-0375 Edition July 2017 Diving systems The content of this service document is the subject of intellectual property rights reserved by DNV GL AS ("DNV GL"). The user accepts that it is prohibited by anyone else but DNV GL 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 GL's prior written consent. DNV GL is not responsible for the consequences arising from any use of this document by others. The electronic pdf version of this document, available free of charge from http://www.dnvgl.com, is the officially binding version. DNV GL AS FOREWORD DNV GL rules for classification contain procedural and technical requirements related to obtaining and retaining a class certificate. The rules represent all requirements adopted by the Society as basis for classification. © DNV GL AS July 2017 Any comments may be sent by e-mail to [email protected] If any person suffers loss or damage which is proved to have been caused by any negligent act or omission of DNV GL, then DNV GL 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 "DNV GL" shall mean DNV GL AS, its direct and indirect owners as well as all its affiliates, subsidiaries, directors, officers, employees, agents and any other acting on behalf of DNV GL. CHANGES – CURRENT This is a new document. This document replaces the December 2015 edition of DNV-DSS-105 and the April 20017 edition of DNV-RP- E401. Changes - current Rules for classification: Offshore units — DNVGL-RU-OU-0375. Edition July 2017 Page 3 Diving systems DNV GL AS CONTENTS Changes – current............................................................ 3 Chapter 1 Principles and procedures for classification...... 7 Contents Section 1 General................................................................................................................ 7 1 Introduction......................................................................................................... 7 1.1 Objective..........................................................................................................7 1.2 Scope.............................................................................................................. 7 1.3 Application....................................................................................................... 7 1.4 Organisation of this document............................................................................8 2 References........................................................................................................... 8 2.1 Normative references........................................................................................ 8 2.2 Informative references..................................................................................... 11 2.3 Terminology and definitions.............................................................................. 11 2.4 Abbreviations and symbols............................................................................... 18 Section 2 Principles and procedures for classification.......................................................21 1 Introduction....................................................................................................... 21 2 Classification principles......................................................................................21 2.1 The classification concept................................................................................. 21 2.2 Statutory certification...................................................................................... 21 3 Classification scope and notations..................................................................... 22 3.1 Scope............................................................................................................ 22 3.2 Class notations............................................................................................... 22 4 Assignment of class........................................................................................... 23 4.1 Assignment of class - new systems................................................................... 23 4.2 Survey during construction...............................................................................25 4.3 Assignment of class - existing systems.............................................................. 27 4.4 Classification certificate.................................................................................... 28 5 Retention of class.............................................................................................. 30 5.1 Conditions of retention of class.........................................................................30 5.2 Damage and repairs........................................................................................ 30 5.3 Withdrawal of class......................................................................................... 30 6 Certification of materials, components and systems.......................................... 31 6.1 Introduction.................................................................................................... 31 6.2 Type approval................................................................................................. 31 7 Legal provisions................................................................................................. 31 Rules for classification: Offshore units — DNVGL-RU-OU-0375. Edition July 2017 Page 4 Diving systems DNV GL AS Chapter 2 Design, construction and certification provisions.................................................................... 32 Section 1 Surface diving systems...................................................................................... 32 1 Introduction....................................................................................................... 32 2 Technical requirements......................................................................................32 Contents 3 Documentation requirements.............................................................................32 4 Survey and testing requirements.......................................................................32 4.1 General.......................................................................................................... 32 4.2 During and after manufacturing and assembly.................................................... 32 4.3 Survey and testing requirements during and after installation............................... 32 5 Certification requirements................................................................................. 33 5.1 General.......................................................................................................... 33 5.2 Launch and recovery systems...........................................................................33 5.3 Design and manufacture.................................................................................. 33 5.4 Assembly........................................................................................................36 Section 2 Saturation diving systems................................................................................. 37 1 Introduction....................................................................................................... 37 2 Technical requirements......................................................................................37 3 Documentation requirements.............................................................................37 4 Survey and testing requirements.......................................................................37 4.1 General.......................................................................................................... 37 5 Certification requirements................................................................................. 37 5.1 General.......................................................................................................... 37 5.2 Launch and recovery systems...........................................................................38 5.3 Design and manufacture.................................................................................. 38 5.4 Assembly........................................................................................................40 Chapter 3 Classification in operation.............................. 42 Section 1 Principles for Surveys........................................................................................ 42 1 Introduction....................................................................................................... 42 1.1 General.......................................................................................................... 42 1.2 Other codes....................................................................................................42 2 Survey execution............................................................................................... 42 2.1 General.........................................................................................................