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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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...Class guideline dnv cg edition october hybrid laser arc welding the content of this service document is subject intellectual property rights reserved by as user accepts that it prohibited anyone else but and or its licensees to offer perform classification certification verification services including issuance certificates declarations conformity wholly partly on basis pursuant whether free charge chargeable without s prior written consent not responsible for consequences arising from any use others pdf electronic version available at website com official if there are inconsistencies between other shall prevail foreword guidelines contain methods technical requirements principles acceptance criteria related classed objects referred rules comments may be sent e mail has been prepared based knowledge technology information time parties than sole risk unless otherwise stated in an applicable contract following mandatory law liability parent companies subsidiaries well their officers direc...

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