| 摘要 |
PROBLEM TO BE SOLVED: To provide a duct, a connection structure for a duct, and a method for manufacturing a duct, capable of preventing leak of gas flowing in the duct, and improving welding workability. SOLUTION: This duct 1 is composed of a left duct part 1L and a right duct part 1R connected to each other. A left flange part 5 is provided on a left duct main body 2, and a right flange part 7 is provided on a right duct main body 3. They are welded with each other as the flange parts 5 and 7 are applied to each other. They are composed in such a way that extension width of the left flange part 5 in an outer circumferential direction is larger than extension width of the right flange part 7 in the outer circumferential direction, so that level difference is formed between tips of the flange parts 5 and 7. To parts with the level difference, more weld metal 8 is provided in welding them. COPYRIGHT: (C)2004,JPO
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