Seamless multilayer composite pipe

B - Operations – Transporting – 21 – C

Patent

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Details

B21C 23/30 (2006.01) B21C 23/00 (2006.01) B29C 47/02 (2006.01)

Patent

CA 2684541

The present invention relates to a method and an apparatus (100, 200) for manufacturing a seamless multilayer composite pipe (1), and a seamless multilayer composite pipe (1). The method of manufacturing a seamless multilayer composite pipe (1) comprises the steps of a) providing a seamless metal pipe (3) with at least one continuous layer (5) covering its inner surface, and b) passing the seamless metal pipe (3) through a unit (109, 209) in order to reduce the diameter of the seamless metal pipe (3) by cold working. The apparatus (100, 200) comprises said continuous layer (5) covering unit and said cold working unit (109, 209). A seamless multilayer composite pipe comprises a seamless metal pipe (3) with at least one continuous layer (5) covering its inner surface, wherein said continuous layer is mechanically compressed.

La présente invention se rapporte à un procédé de fabrication d'un tuyau composite multicouche sans raccord, à un appareil destiné à fabriquer un tuyau composite multicouche sans raccord et à un tuyau composite multicouche sans raccord. Le procédé de fabrication d'un tuyau composite multicouche sans raccord comprend les étapes consistant à : a) utiliser un tuyau métallique sans raccord, au moins une couche continue recouvrant sa surface intérieure et, b) faire passer le tuyau métallique sans raccord au travers d'une unité afin de réduire le diamètre du tuyau métallique sans raccord grâce à un usinage à chaud. Un appareil permettant de fabriquer un tuyau composite multicouche sans raccord comprend une unité destinée à munir un tuyau métallique sans raccord d'au moins une couche continue recouvrant sa surface intérieure, et une unité destinée à réduire le diamètre du tuyau métallique sans raccord par usinage à chaud. Un tuyau composite multicouche sans raccord comprend un tuyau métallique sans raccord comprenant au moins une couche continue recouvrant sa surface intérieure, la couche continue recouvrant la surface intérieure du tuyau métallique sans raccord étant compressée mécaniquement.

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