Method and apparatus for cooling inner surface of metal pipe

Details Method and apparatus for cooling inner surface of metal pipe Method and apparatus for cooling inner surface of metal pipe

C - Chemistry, Metallurgy

21

D

38/30, 148/55

C21D 1/62 (2006.01)

Patent

CA 1083022

Abstract of the disclosure A cooling method and apparatus wherein in the process of continuously hardening a metal pipe by heating the metal pipe as it passes through a heating unit and then cooling the inner surface of the metal pipe, an annular cooling nozzle having a large number of nozzle openings is placed in the metal pipe, and the spray direction of jets of cooling medium from the nozzle openings is selected so as to maintain a dip angle of between 30° and 70° and a transversal angle of between 30° and 90° and either cooling water or a mixture of cooling water and compressed air is sprayed with a jet velocity of greater than 5 meters per second onto a large number of points on the circumference of the inner wall of the metal pipe.

270489

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