Re: CFR 49 part 230.31 (b)
Author: RKS
Date: 10-20-2009 - 23:26
Seems to me the last tube job was around 1996 or 1997. It was unplanned, but some tube pitting was found shortly before a scheduled trip and caused some concern.
As I recall, the whole job including pulling superheater units, cutting out the tubes, doing a complete ultrasound of the barrel from the inside and of the stayed areas from the outside, getting the new tubes, putting them in, rolling, seal welding, and reinstalling the units took a couple of weeks.
The trip went off without a problem and no one knew the difference.