Abstract: A method for attaching together by means of explosion welding two metal pipes (2; 3) arranged within each other, wherein a mantle of explosive material (5) is arranged around the outer pipe (2) and this mantle is made to explode in order to cause a metallurgical joint between the two pipes, according to the present invention is characterised in that the interior (4) of the inner pipe (3) is filled with granular material (6) and the interstices left free by the granular material (6) are filled with liquid (7) before the explosive material (5) is made to explode.