Method for connecting two individual elements of an underwater fluid-transport pipe subject to fatigue
AssigneeSaipem S.P.A.
InventorsRachid Yousfi, Stefan Dobre
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Abstract
A method of connecting together two unit elements (2, 4) of an undersea fluid transport pipe that is subjected to fatigue, by welding together two metallic or bi-metallic unit pipe elements that have been put into abutment via their respective free ends (2a, 4a), the welding being done by making three distinct weld beads (6, 8, 10), with a last weld bead (8) being deposited between two lateral first weld beads (6, 10), and being followed directly by controlled sanding of the weld beads in order to apply compression stresses on them.
Claims6
A method of connecting together two unit elements of an undersea fluid transport pipe that is subjected to fatigue, the method comprising welding together two metallic or bi-metallic unit pipe elements that have been put into abutment via their respective free ends, the welding being done by making three distinct weld beads, beginning with two lateral first weld beads that are deposited beside the respective free ends of the unit elements, followed by a last weld bead being deposited between the two lateral first beads, and being followed directly by controlled sanding of the weld beads in order to apply compression stresses on them.
Dependencies are inferred from the claim text.