METHOD AND SYSTEM FOR MANUFACTURING METAL-PLATED STEEL PIPE

摘要

To provide a system and a method capable of easily adjusting a dipping time in a continuous steel pipe manufacturing line. Provided is a steel pipe manufacturing system that manufactures a steel pipe of which inner and outer faces or any one face thereof is subjected to molten metal-plating from a steel sheet in a continuous manufacturing line, the system including: an inner-face plating performing part that performs molten metal-plating by pouring molten metal to the upper side of the steel sheet corresponding to the inner face of the steel pipe; a steel pipe forming part that obtains a continuous steel pipe by continuously cold-forming the steel sheet subjected to the inner-face plating into a tubular shape and seam-welding a longitudinal end face joint portion of the steel sheet formed in the steel pipe; and an outer-face plating performing part that performs molten metal-plating by dipping the outer face of the steel pipe into the molten metal, in which a dipping length of the molten metal is adjusted in the inner-face plating performing part and/or the outer-face plating performing part.