| 摘要 |
<p>The invention relates to a method of welding together for example two pipe pieces (1, 3) having an advance opening. First of all, the first pipe (1) piece is magnetised by contacting the first pipe piece with a magnetic (1, 2) element. Then a second pipe (B) piece is positioned with respect to the first pipe piece, such that the surfaces of the pipe pieces to be welded are facing each other. Said surfaces of the pipe pieces are then welded at least partially, whereafter the magnetic element is removed. According to the invention, the magnetic element is positioned between said surfaces of the first (A) and second pipe pieces which are interconnected by welding. The magnetic element covers only a part of said surfaces.</p> |
