| 摘要 |
PURPOSE:To prevent seizure of mill rolls and to prevent a forge welded pipe from flaw in a method for producing the pipe wherein both edges mated oppositely to each other by curving a heated skelp are butt forge welded by ejecting an oil to the part near the flanges of the mill rolls. CONSTITUTION:A skelp S is formed to an open pipe OP by forming rolls 40, 40, and both edges are butted and forge-welded by mill rolls 41, 41 thereby forming a forge welded pipe P. The oil mixture formed by mixing the oil from an oil tank 10 and the water from an industrial water tank 20 in a mixer 30 is ejected from nozzles 32 to the rolls 41, 41. The rolls are then cooled and lubricated, whereby the seizure on the caliber surface of the rolls and the scratching flaw on the surface of the pipe P caused by the seizure are thus eliminated. |
