F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
F16L 15/06 (2006.01)
Patent
CA 2686233
A threaded joint has an interference between thread roots of pin and thread crests of the box of value comprised between 1% and 5% of the average thickness of the connection, and a root to load flank radius R comprised in the range of 0,2 mm and 0,4 mm and a surface treatment comprising shot peening applied to the beginning and end of the threaded zone of the pin. In other embodiments the interference can be between thread roots of box and thread crests of the pin.
Un élément tubulaire fileté possède une interférence entre des fonds de filets de filetage mâle et des sommets de filet du filetage femelle d'une valeur comprise entre 1 % et 5 % de l'épaisseur moyenne du raccord, et un fond de filet sur le rayon R du flanc de charge compris entre 0,2 mm et 0,4 mm, et un traitements de surface comprenant un grenaillage de précontrainte appliqué au début et à la fin de la zone filetée de la partie mâle. Dans d'autres modes de réalisation de l'invention, l'interférence peut être entre les fonds de filet du filetage femelle et les crêtes de filet du filetage mâle.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Tenaris Connections Ag
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