Abstract
Inverter based technology combined with modern Arc Wave Form Control™ created the base for the new GMAW process, the so called STT ® process. Details of this process are described. Increased productivity, high weld metal quality, almost no spattering and low fume emission are the main features which led to attractive applications. They include, in particular, one side root pipe welding and sheet metal welding such as applied in cladding of reactor vessels of flue gas desulphurisation components of power plants. Details of the welding procedures and the verification of the quality aspects are reported.
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