Gas-tight pipe connection

Details Gas-tight pipe connection Gas-tight pipe connection

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 21/00 (2006.01) F16L 15/00 (2006.01) F16L 55/00 (2006.01)

Patent

CA 2071695

ABSTRACT OF THE DISCLOSURE A gas-tight pipe connection includes a sleeve which has two internal thread portions which extend from the ends of the sleeve to a thread-free portion located in the middle of the sleeve. The sleeve includes a radially inwardly projecting web located in the middle of the thread-free portion and extending over a certain width. The web has end faces constructed as contact shoulders. A sealing portion each is provided between the internal thread portions and the contact shoulders. The connection further includes two pipes, each of which has in an end portion thereof a threaded portion constructed complementary to the internal thread portion of the sleeve. Each pipe also has a contact shoulder and a sealing surface arranged between the contact shoulder and the threaded portion. A tight metal seat is formed between the sealing surface of the pipe and the sealing portion of the sleeve. The sleeve is provided with an opening extending through the wall of the sleeve in each area of the thread-free portion between the tight metal seat and the internal thread portion. The openings make it possible to reproducibly test the gas-tightness of the pipe connection within less than 60 seconds.

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