Patent ID: 6991038

Claim:
A method for dimensioning a part of a riser comprising a main tube, a tubular element that constitutes an auxiliary line portion, the tubular element being linked to the main tube by a fit-in link located at a first end of the tubular element and by a sliding pivot link located at a second end of the tubular element, allowing a longitudinal play in relation to the main tube, the play having a value J when the tubular element and the main tube undergo no stresses, the method comprising the following stages: (a) determining value Pm representing the maximum difference between the internal pressure and the external pressure that can be withstood by the tubular element without buckling, considering the free length between said links, (b) determining value J for the tubular element to form a hyperstatic assembly when the difference between the internal pressure and the external pressure applied to the tubular element is higher than value Pm determined in stage (a).