METHOD FOR PRODUCING gas and oil pipes of large diameter

摘要

1. A method of producing gas and oil pipes of large diameter, comprising: heating slabs, billets, aligning rolling it to the sheet and forming the sheet from the tube blank in a hot state, characterized in that prior to forming the preform tube to produce hot-rolled sheet edges in vertical rolls with edzhernyh followed by removing edges and bevels for welding termofrezirovaniem and after formation of the blank tube, it was cooled in a muffle refrigerator by adjusting the cooling process. ! 2. A method according to claim 1, characterized in that the vertical edges of the rolling rolls are edzhernyh with a relative compression width of 2-15%.