Whin
Mechanical
- Jun 2, 2021
- 7
We have deaerator operational for a decade, during which we have conducted annual internal inspections focusing on weld magnetic particle testing and ultrasonic thickness measurements of the shell and heads. To date, no deterioration has been noted in these areas. However, we have identified significant issues with the water/steam box, which has multiple cracks and has undergone local repairs. No operational upset also recorded on boiler feedwater quality. My concern is whether we can extend the inspection interval to a maximum of five years, given that there are no major integrity concerns with the primary pressure component. Could someone provide relevant codes (i.e., NBIC) to support the appropriate inspection frequency for the deaerator?
