| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a UOE steel tube with excellent productivity. SOLUTION: A butt weld joint of the submerged arc welding of a seam part of a stock UOE steel tube to be used for a pipeline or the like has a groove of an X-shaped section, and the sectional area of the groove on the outer surface side of the stock tube having the groove of the X-shaped section is set to be smaller than that on the inner side of the stock tube. An outer face of the seam part of the stock tube is permanently welded by CO<SB>2</SB>welding which is also used for temporary welding, and an inner face thereof is permanently welded by the submerged arc welding. COPYRIGHT: (C)2006,JPO&NCIPI |
