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CLASS GUIDELINE DNV-CG-0287 Edition October 2021 Hybrid laser-arc welding The content of this service document is the subject of intellectual property rights reserved by DNV 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. The PDF electronic version of this document available at the DNV website dnv.com is the official version. If there are any inconsistencies between the PDF version and any other available version, the PDF version shall prevail. DNV AS FOREWORD DNV class guidelines contain methods, technical requirements, principles and acceptance criteria related to classed objects as referred to from the rules. © DNV AS October 2021 Any comments may be sent by e-mail to rules@dnv.com This service document has been prepared based on available knowledge, technology and/or information at the time of issuance of this document. The use of this document by other parties than DNV is at the user's sole risk. Unless otherwise stated in an applicable contract, or following from mandatory law, the liability of DNV AS, its parent companies and subsidiaries as well as their officers, directors and employees (“DNV”) for proved loss or damage arising from or in connection with any act or omission of DNV, whether in contract or in tort (including negligence), shall be limited to direct losses and under any circumstance be limited to 300,000 USD. CHANGES – CURRENT This document supersedes the December 2015 edition of DNVGL-CG-0287. The numbering and/or title of items containing changes is highlighted in red. Changes October 2021 Topic Reference Description Rebranding to DNV All This document has been revised due to the rebranding of DNV GL to DNV. The following have been updated: the company name, material and certificate designations, and references to Changes - current other documents in the DNV portfolio. Some of the documents referred to may not yet have been rebranded. If so, please see the relevant DNV GL document. No technical content has been changed. Editorial corrections In addition to the above stated changes, editorial corrections may have been made. Class guideline — DNV-CG-0287. Edition October 2021 Page 3 Hybrid laser-arc welding DNV AS CONTENTS Changes – current.................................................................................................. 3 Section 1 Introduction............................................................................................ 6 Contents 1 Objective..............................................................................................6 2 Background..........................................................................................6 Section 2 The hybrid laser-arc welding process......................................................7 1 Description of process.........................................................................7 2 Particulars of the hybrid laser-arc welding process.............................8 3 The Society's approval strategy...........................................................8 Section 3 Base material.......................................................................................... 9 1 General................................................................................................ 9 Section 4 Test requirements applied to hybrid laser-arc welds.............................10 1 Welding consumables........................................................................ 10 2 Welding personnel.............................................................................10 3 Welding process approval..................................................................10 4 Preliminary welding procedure specification (pWPS)........................ 10 5 Welding procedure tests....................................................................10 6 Surface condition...............................................................................12 7 Tack welding......................................................................................12 8 Repairs...............................................................................................12 9 Fatigue testing...................................................................................12 Section 5 Monitoring of the hybrid laser-arc welding machines............................13 1 General.............................................................................................. 13 2 Maintenance and checks of the conventional equipment................... 13 3 Checks and measurement of the laser beam properties.....................13 4 Control of welding parameters.......................................................... 13 5 Welding production test (WPT)......................................................... 13 Section 6 Protection against laser radiation hazards............................................15 1 General.............................................................................................. 15 Section 7 References.............................................................................................16 1 List of references...............................................................................16 Appendix A Example WPQR...................................................................................17 Class guideline — DNV-CG-0287. Edition October 2021 Page 4 Hybrid laser-arc welding DNV AS
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