Double-walled corrugated pipe

Details Double-walled corrugated pipe Double-walled corrugated pipe

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 9/18 (2006.01)

Patent

CA 2523366

The invention relates to a double-walled corrugated pipe (10) comprising a corrugated outer pipe and a smooth inner pipe which are welded together in the region of the inner folds (16) of the outer pipe thereby forming cavities (18) between the inner pipe and the outer pipe. Said corrugated pipe also comprises at least two connecting channels (20) which extend in the region of the welding zone (16) between the cavities as far as the surrounding area. As a result, the cavities remain open to the surrounding area. The connecting channels are arranged in an offset manner in relation to adjacent welding zones.

L'invention concerne un tuyau ondulé à double paroi (10) comportant un tuyau extérieur ondulé (12) et un tuyau intérieur lisse (14), lesquels tuyaux sont soudés au niveau de la pliure intérieure (16) du tuyau extérieur de sorte que des cavités (18) sont formées entre le tuyau intérieur et le tuyau extérieur. Au moins deux canaux de jonction (20) s'étendent au niveau de la zone de soudure (16) entre les cavités jusqu'au milieu ambiant de sorte que ces cavités sont maintenues ouvertes jusqu'au milieu ambiant, les canaux de jonction de zones de soudure adjacentes étant disposés de façon décalée l'un par rapport à l'autre.

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