METHOD FOR PRODUCTION OF ELECTRIC-WELDED STRAIGHT-SEAM PIPES

摘要

Use: in the manufacture of thick-walled pipes longitudinally-electric resistance welding. The inventive method comprises forming the initial peripheral portions of the initial strip along the radius equal to the radius of the finished tube, the middle part of subsequent molding is carried out to obtain dvuhradi- usnogo profile with radius lane iferiynyh portions equal .radiusu finished tube in the last mold and shovnapravl present Yu- calibers and welding the edges in the welding caliber. In the method regulate the ratio of heights of welding and the guide shovnapravl calibres which INSTALLS tanavlivayut equal 0,95-0,96. 9-yl,