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

摘要

Provided is a method for quenching a steel pipe and an apparatus for quenching a steel pipe by which a steel pipe having excellent and uniform quality can be acquired by applying uniform rapid cooling to the steel pipe in a longitudinal direction as well as in a circumferential direction of the steel pipe using a simple unit. Movements of a heated steel pipe in a direction parallel to and in a direction perpendicular to a pipe axis of the steel pipe are stopped, and cooling water is jetted onto an outer surface of the steel pipe from four or more spray nozzles arranged spirally outside the steel pipe while rotating the steel pipe about the pipe axis.