COOLING METHOD OF PIPE MATERIAL

摘要

PURPOSE:To cool homogeneously and efficiently a pipe material without bending the same by holding the pipe material in a heted state with press rolls on driving rolls, and injecting cooling fluid from a nozzle group disposed in parallel with the pipe material while rotating the material at a prescribed speed or above. CONSTITUTION:A pipe material 11 which is kept heated to a high temp. is carried onto driving rolls 16 of a cooler 15 and is held while it is held pressed onto the rolls 16 by press rolls 17. The material 11 which is held as mentioned above is rotated by the rolls 16 at >=60 revolutions/min. rotating speed and is cooled from the outside by the cooling fluid injected from the cooling nozzles 19 of cooling headers 18. The uniform cooling in the axial and circumfeential directions of the material 11 is thus made possible. The required number of the headers 18 to be installed around the pipe 11 is decreased if the material 11 is revolved at a high speed.