METHOD FOR CONNECTION OF SPIRAL-SEAM PIPES OF COILED HOLLOW SECTION

摘要

A method for connection of spiral-seam pipes of coiled hollow section includes formation of end surfaces on the inner and outer walls of hollow section at connected ends of the pipes, connection of screw-shaped surfaces of coiled section of spiral-seam pipes and connection of the end surfaces with following fixation. The end surface on the inner wall of the end of one of two tubes that is to be connected is formed by means of removal of a section of inner wall of coiled hollow section. The end surface at the outer wall of respective end of the other pipe that is to be connected is formed by means of removal of section of the outer wall of coiled hollow section. At that connection of screw-shaped surfaces is carried out through turning-on of those ends of the pipes.