Prospects of application of laser-GMA hybrid welding for manufacturing of large diameter longitudinal welded high strength steel pipes

  • To a large extend, longitudinally welded large-diameter pipes are used for modern oil- und gas-pipelines. Thereby the mostly applied base materials are made from the API-steels X65 and X70. Constantly increasing natural gas and oil delivery rates demand advancements of the assigned materials. Wall thickness minimization or operating pressure increase is achieved by material Substitution, e.g. employment of a high strength Steel grade API-X80, API-X100 or API-X120. For the production of such pipes a large plate is first formed to an open ring. Subsequent, it is continuously tacked along its longitudinal gap by means of a GMA-process. In the further process, the remaining double-sided joint gaps are filled up by cost-intensive multiple-wire submerged arc welding (SAW) processes. The GMA-tack weld is being completely remelted in the process. The maximal root face is dependent on the welding process and which is currently 8 mm. The innovative laser hybrid welding technology offers aTo a large extend, longitudinally welded large-diameter pipes are used for modern oil- und gas-pipelines. Thereby the mostly applied base materials are made from the API-steels X65 and X70. Constantly increasing natural gas and oil delivery rates demand advancements of the assigned materials. Wall thickness minimization or operating pressure increase is achieved by material Substitution, e.g. employment of a high strength Steel grade API-X80, API-X100 or API-X120. For the production of such pipes a large plate is first formed to an open ring. Subsequent, it is continuously tacked along its longitudinal gap by means of a GMA-process. In the further process, the remaining double-sided joint gaps are filled up by cost-intensive multiple-wire submerged arc welding (SAW) processes. The GMA-tack weld is being completely remelted in the process. The maximal root face is dependent on the welding process and which is currently 8 mm. The innovative laser hybrid welding technology offers a significant increase in the full penetrated root face and welding speed, compared to conventional wielding technologies. It means for the pipe production, that the amount of SAW filier layers will be reduced and, parallel to that, the increased welding speed will led to the shortening of the production cycle for the longitudinal welded pipes.zeige mehrzeige weniger

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Autor*innen:Michael RethmeierORCiD, Sergej Gook, Andrey GumenyukORCiD
Persönliche Herausgeber*innen:G. Turichin
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Graue Literatur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):VII. International scientific and technical conference 'Beam technologies & laser application' (Proceedings)
Jahr der Erstveröffentlichung:2013
Herausgeber (Institution):Saint-Petersburg state polytechnic university
Verlag:Publishing house SPbSPU
Erste Seite:130
Letzte Seite:140
Freie Schlagwörter:High strength steel; Laser hybrid welding; Longitudinal weld; Modified spray arc; Pipeline
Veranstaltung:VII. International scientific and technical conference 'Beam technologies & laser application'
Veranstaltungsort:Saint-Petersburg, Russia
Beginndatum der Veranstaltung:18.09.2012
Enddatum der Veranstaltung:21.09.2012
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:20.02.2016
Referierte Publikation:Nein
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