Laser-arc hybrid welding guidelines

19 Jan 2015
The laser-hybrid process is  best suited to when long seams and solid joins are required. Pictured: The Fronius-developed LaserHybrid TimeTwin digital system

The laser-hybrid process is best suited to when long seams and solid joins are required. Pictured: The Fronius-developed LaserHybrid TimeTwin digital system

Japanese classification society, ClassNK, has released an updated version of its guidance on laser-hybrid welding to build upon the original guidelines developed back in December 2009.

ClassNK said that its Guidelines on Laser-Arc Hybrid Welding (Ver. 2) have been updated in order to promote the widespread use of this type of welding in shipyards, which it said improves the accuracy of block building, which in turn assists shipyards in achieving a more high-precision shipbuilding method.

Laser-arc hybrid welding is a combination of both laser and arc welding methods capable of achieving the same depth of penetration as the standard arc welding method. But it has the added benefit of potentially inhibiting thermal deformation due to its low required heat input.

Before manufacturers can use laser-arc hybrid welding in the construction of vessels, they must first obtain approval for the Welding Procedure Specification (WPS) and the Quality Verification Procedure Specification of production welding.

So ClassNK’s guidelines revision includes a comprehensive summary of the requirements for welding procedure qualification tests, welding procedure specification and quality verification procedure specification of production welding, among other regulations.

The classification society said that as shipyards look to achieve higher quality and efficiency in shipbuilding methods, the future diffusion of laser-arc welding on commercial vessels is highly anticipated. Its guidelines on Laser-Arc Hybrid Welding are available to download from ClassNK.

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