Patent ID: 6412831
Filing Date: 2002-07-02
Classification: F16L

Abstract:
A threaded connection for two metal pipes, comprising a male element at the end of a first metal pipe screwed into a female element at the end of a second metal pipe, the male element comprising an external male tapered thread with trapezoidal threads comprising two flanks, namely a load flank and a stabbing flank, a thread width at a male thread crest being less than the thread width at the root of the male thread, the female element comprising an internal tapered female thread with trapezoidal threads with a form which mates with the male thread, the width of the thread crests on each of the male and female threads being higher than the width of a space between the roots of the mating threads, characterized in that the male element is positioned by screwing into the female element to a relative position of these two elements located beyond the relative position where, during makeup, the two flanks of the male threads come into contact with the two flanks of the female threads so as to induce an axial interference fit of the male threads by the female threads and vice versa.