Development of a nozzle for underwater laser beam welds
- GKSS Forschungszentrum Geesthacht GmbH (Germany)
- Bremen Inst. for Applied Beam Technology (Germany)
The present study describes the work carried out to develop a nozzle for the welding or treatment of surfaces of components underwater. Two different types of nozzles have been investigated: contactless and sealed. With the former a dry working zone could only be achieved at very high gas flow and at a maximum extension of 2--3mm. The nozzles based on the labyrinth sealing concept were capable of producing and maintaining a dry working zone with acceptable gas flow and an extension range of 4mm. In the development of this nozzle the following factors have been considered: number of rubber layers, included angle of the sealing, quantity, position and diameter of the gas outlets and the extension range. The underwater nozzle developed in the course of this work has been successfully tested in a simulated patch welding repair of a stainless steel pipe at 3m water depth.
- OSTI ID:
- 403607
- Report Number(s):
- CONF-9606279-; ISBN 0-7918-1492-0; TRN: IM9651%%642
- Resource Relation:
- Conference: 14. international conference on offshore mechanics arctic engineering (OMAE), Florence (Italy), 16-20 Jun 1996; Other Information: PBD: 1996; Related Information: Is Part Of OMAE 1996 -- Proceedings of the 15. international conference on offshore mechanics and arctic engineering. Volume 3: Materials engineering; Salama, M.M. [ed.] [Conoco Inc., Ponca City, OK (United States)]; Toyoda, Masao [ed.] [Osaka Univ. (Japan)]; Liu, S. [ed.] [Colorado School of Mines, Golden, CO (United States)]; Santos, J.F. dos [ed.] [GKSS, Geesthacht (Germany)]; Stacey, A. [ed.] [Health and Safety Executive, London (United Kingdom)]; Tubby, P.; Pisarski, H. [eds.] [TWI, Cambridge (United Kingdom)]; PB: 579 p.
- Country of Publication:
- United States
- Language:
- English
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