STEEL PIPE QUENCHING METHOD, STEEL PIPE QUENCHING APPARATUS, STEEL PIPE PRODUCTION METHOD, AND STEEL PIPE PRODUCTION EQUIPMENT

摘要

Provided are a quenching method and a quenching apparatus capable of producing steel pipes having excellent and uniform quality by means of a simple procedure in which a steel pipe is uniformly and rapidly cooled in the longitudinal direction and in the circumferential direction. Movement in directions parallel to and directions perpendicular to the pipe axis of a heated steel pipe is stopped, and while rotating the steel pipe about the pipe axis, the outer surface of the steel pipe is sprayed with chilled water from at least four spray nozzles arranged in a helical shape on the outside of the steel pipe.