Gas-tight pipe connection

Details Gas-tight pipe connection Gas-tight pipe connection

1992-06-22

1994-01-04

Arola, Dave W.

Pipe joints or couplings

With indicator, alarm or inspection means

285333, 285383, 285 39, F16L 3500

Patent

active

052754456

ABSTRACT:
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.

REFERENCES:
patent: 3214198 (1965-10-01), Peuchmaur
patent: 3521910 (1970-07-01), Callahan et al.
patent: 4455040 (1984-06-01), Shinn
patent: 4572549 (1986-02-01), Sidwell
patent: 4913464 (1990-04-01), Taylor et al.
patent: 4984829 (1991-01-01), Saigo et al.
patent: 5048873 (1991-09-01), Allread et al.

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