| 摘要 |
Apparatus (10) and method of forming a deep sea pipeline or a cross country pipeline by welding pipes together to form the pipeline. At least two arc welding torches (1) are arranged directly adjacent to each other on a single carriage that moves around the pipes, to form a twin arc welding system. The arcs are guided automatically by an electronic guidance system, wherein electrical characteristics of the welding of each torch (1) with regard to each pipe (2, 4), respectively, are ascertained and a comparison made between the electrical characteristics relating to one of the pipes with the corresponding electrical characteristics relating to the other of the pipes.
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