METHOD FOR FORMING PIPE JOINT, PIPE JOINT AND FLANGE PART ARRANGEMENT Russian patent published in 2018 - IPC F16L23/32 B21D19/04 

FIELD: machine building.

SUBSTANCE: invention relates to a method for forming a pipe joint which is formed from the end portions of pipe sections (1, 2) to be joined together, said end portions having ring element (3, 4), and from flange parts (9, 10) which are placed on different sides of the ring elements and tightened with suitable fixing means, such as screws (17) and nuts (18). Ring element (3, 4) of the pipe section is formed from the wall of the end of the pipe section by shaping with shaping means (F). Joint surface (7, 8) of ring element (3, 4) of at least one of pipe sections (1, 2) to be joined is arranged to be divergent by the amount of an angle (α, ß) from the plane perpendicular to longitudinal axis (L) of the pipe section. Invention also relates to a method and to a flange part arrangement. Flange part arrangement is described.

EFFECT: invention improves joint reliability.

28 cl, 25 dwg