HOT-DIP GALVANIZED STEEL TUBE AND METHOD OF MANUFACTURING HOT-DIP GALVANIZED STEEL TUBE

摘要

PROBLEM TO BE SOLVED: To provide a method of manufacturing a hot-dip galvanized steel tube that can suppress galvanization defects and manufacture the hot-dip galvanized steel tube having a uniform a plating thickness, and the hot-dip galvanized steel tube.;SOLUTION: A method of manufacturing a hot-dip galvanized steel tube comprises: a flux immersion processing stage of dipping a plurality of original tubes 10 in flux to stick the flux on the original tubes 10; a drying processing stage of drying, after the flux immersion processing stage, the original tubes 10 in a drying furnace 16; and a hot-dip galvanization processing stage of performing, after the drying processing stage, performing hot-dip galvanization processing on the original tubes 10. Further, the method of manufacturing the hot-dip galvanized steel tube includes: conveying, by a conveyor 13, the original tubes 10, having the flux stuck in the flux immersion processing stage, toward the drying furnace 16; and blowing flux toward the original tubes 10 from above the conveyor 13. Consequently, plating defects can be suppressed, and plating can be stuck uniformly on the original tubes 10 so as to manufacture hot-dip galvanized steel pipes which are uniform in plating thickness.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT