Thin wall thickness

[Dean Romig]

It is possible that a certain amount of stress induced stretching may have occurred immediately before the failure…





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[DoubleOframe]

Originally Posted by Dean Romig

It is possible that a certain amount of stress induced stretching may have occurred immediately before the failure…





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Dean,

I wondered that as well, possibly there was a bulge there but above and below the blowout also measured very thin as shown in the photos. The blowout was centered at 13.5" inches on a set of 26" barrels.

[Drew Hause]

Thank you Channing.
re: the effect of bulging prior to the burst on wall thickness. I discussed the issue with the Metallurgical Engineer doing one of my failure evaluations. His answer was "not much".

Helpful demonstration.
The straight ribband end welds are marked.
The crack clearly occurred at the rod to rod weld.
The terminal cleavage/split was across the welds.
Damascus mythology has been that barrels will "unwind like a slinky". Not if the ribband welds are intact.