PIPE COOLING METHOD Russian patent published in 2007 - IPC C21D9/08 B21B45/02 

FIELD: pipe rolling production for thermal reinforcement of pipes in thermal department lines and hot rolling mills.

SUBSTANCE: method involves providing longitudinal movement and feeding of coolant at an angle to axis of movement by means of pairs of countercurrent jets, said jets in pairs of jets flowing without intersection with respect to one other; increasing angles of feeding said jets coinciding with direction of advancement of pipe in succession from one pair of countercurrent jets to other pair of countercurrent jets in this direction; decreasing angles of feeding jets oriented in direction opposite to direction of advancement of pipe in succession, from one pair of countercurrent jets to other pair of countercurrent jets in direction of advancement of pipe. Also, during movement by each of pipe ends past pair of countercurrent jets, coolant flow rate within it is reduced by 70-90% and simultaneously coolant flow rate in countercurrent jet is increased by 60-80%.

EFFECT: increased efficiency in cooling of pipes, provision for desired combination of properties and required values of geometric parameters of pipes.

2 cl, 3 dwg, 1 tbl