Threaded joint for steel pipes

Details Threaded joint for steel pipes Threaded joint for steel pipes

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 15/04 (2006.01)

Patent

CA 2739711

In a threaded joint for steel pipes comprising a pin (1) and a box (2), each having a threaded portion (11 or 21), a sealing surface (13 or 23), and a shoulder surface (14, 15 or 24, 25), the sealing surface (13) of the pin (1) is formed by a tapered surface, and the sealing surface (23) of the box (2) is formed by a first curved surface portion with a large radius of curvature in the range of 15 - 120 mm, a tapered surface portion, and a second curved surface portion with a large radius of curvature again in the range of 15 - 120 mm.

Linvention concerne un joint fileté pour tuyaux en acier comprenant une goupille (1) et un boîtier (2) ayant chacun une partie filetée (11 ou 21), une surface d'étanchéité (13 ou 23) et une surface d'épaulement (14, 15 ou 24, 25). La surface d'étanchéité (13) de la goupille (1) est formée par une surface conique, et la surface détanchéité (23) du boîtier (2) est formée par une première partie de surface courbée dotée d'un grand rayon de courbure dans une plage de 15 - 120 mm, une partie de surface conique, et une seconde partie de surface courbée dotée dun grand rayon de courbure, à nouveau dans une plage de 15 - 120 mm.

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