NBIC doesn't prescribe a set interval. Taking what you've provided as fact, I would tell one of our customers they can use a longer cycle so long as operating conditions are held near constant. If you've run the DA with the same water quality/treatment, same pressure/temperature, same throughput...
As it pertains to NBIC Part 3 and ASME Section I, what NDE, if any, is necessary for a flush patch in a tubesheet?
I feel it's obvious that a weld in the thickest material of the boiler should be scrutinized, but I can't land on the section of the codes that calls for it.
I've consulted our...
