Application of Ultrasonic Testing to Box Header Small Diameter Pipe Butt Welds
The box header is an important component in power plant boilers.Its main function is to collect and dis-tribute the working medium by connecting with the water walls,superheaters,reheaters,economizers,and asso-ciated pipelines.Due to factors such as welding process,welding personnel skills,complex welding site condi-tions,and high-temperature service environments,small diameter pipes in box headers are prone to leakage acci-dents caused by welding quality issues,which have a negative impact on power generation enterprises and society.During the maintenance of a 660 MW ultra-supercritical unit boiler's box header small diameter pipes,ultrasonic testing was performed for the welding quality,with a total of 20 small diameter pipes sampled for inspection.No defects exceeding the standard were found in the test results,verifying the good welding quality of the small diameter pipes.
box header small diameter pipesbuttweldswelding qualityultrasonic testing
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