| 摘要 |
PROBLEM TO BE SOLVED: To provide a prevention maintenance repair method for a strength secured weld of a membrane panel for a boiler by applying compressive residual stress to an inner surface of a peripheral weld part of a pipe of the membrane panel for the boiler forming a water wall of a boiler furnace and restricting occurrence of curved deformation at the membrane panel for the boiler.SOLUTION: This prevention maintenance repair method for a weld of a membrane panel for a boiler is carried out in such a way that when a penetration crack occurs at a pipe 1 of the membrane panel 20 for the boiler, the penetration crack generated at the pipe 1 is cut away to form a repair part groove, this repair part groove is applied with build-up welding to form a repair build-up weld part 8, and then build-up welding is carried out to form an outer surface build-up weld part 10 entirely against each of both surfaces of a front surface and a rear surface of the boiler membrane panel 20 including the weld part. |
