| 摘要 |
PROBLEM TO BE SOLVED: To provide a duct for a heat recovery steam generator that can prevent concentration of stress applied to both of corner portions in a lower end portion of a header housing due to thermal elongation of the duct and can prevent a crack and deformation in both of the corner portions.SOLUTION: At least each one of evagination portions 21 extending in a width direction of a header housing 5 and in a depth direction of the header housing 5 is individually provided on a corner portion laid on a front surface 5a of the header housing 5 and a lateral surface 5b of the header housing 5 and a corner portion laid on the front surface 5a of the header housing 5 and the other lateral surface 5c of the header housing 5 in a height direction of the header housing 5 in a lower end portion of the header housing 5. |
