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Old 09-03-2008, 01:09 PM
Tom Schiffer Tom Schiffer is offline
 
Join Date: Apr 2006
Location: On Flintlock Farm on Gunpowder Road in Boone County, Kentucky
Posts: 777
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Lexie/Bruno: I have read that bagged boilers were sometimes cooled down and beat back into shape with hammers. I seem to recall that this was a fairly routine thing to do. It is certainly caused by some localized overheating of the boiler shell which lowers the tensile strength at that point and at that elevated temperature to where the internal pressure bulges the shell outward. I think maybe that the Sultana's boilers were bagged and repaired shortly before the "event".
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