| 摘要 |
A flush-type integral threaded joint with truncated-cone threads, with two scaling surfaces 11', 12', 11'', 12 '') set at the end of the threaded portions ( 7, 8 ), and with two annular scaling shoulders ( 5', 6', 5'', 6 ''). The two threaded portions ( 7, 8 ) of the male element ( 1 ) and female element ( 2 ), respectively, have the same value of conicity, and the two sealing surfaces ( 11', 12', 11'', 12 '') are, in one case, conical or cylindrical, and in the other spherical. The threaded portion of each male and female element may have an end area with a thread that is not perfect.
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