FIELD: machine building.
SUBSTANCE: invention relates to thread joint containing the first and the second pipe elements, at that each of them has appropriate male and female end parts, at that make end part contains at least one thread part on its external peripheral surface and ends on end surface, at that female end part contains at least one thread part on its internal peripheral surface and ends on the end surface. The thread parts contain on at least part of their length the thread turns, each of them contains, if looking in direction of the cross-section, passing through the pipe element axis, thread top, thread vee, work side and non-work side. Profiles of the work surfaces (30, 40) of female and male threads, if looking in direction of the cross-section, passing through the joint rotation axis, is continuous curve with convex or concave shape, at that profile of the male side surfaces is complementary for female side surfaces, by at least 70%, preferably 90% of said continuous curve.
EFFECT: invention improves reliability of the joint.
16 cl, 6 dwg
