February 2011, Vol. 238 No. 2

Features

Advanced Pipeline Welding Technologies Boost Productivity

For years pipelines have been constructed by manual welders using conventional arc welding processes and consumables. This approach is still used to construct small-diameter, low-pressure pipelines as well as tie-ins and repairs on larger diameter, high-pressure pipelines. However, for larger diameter pipeline projects, there has been a shift away from manual arc welding to more automated arc welding systems, with multiple welding arcs. The automation aspect of these systems allows for better control of the welding parameters and a reduction in the total volume of weld metal required by moving away from conventional V-groove designs to narrower groove designs. Multiple welding a

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