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Of the 12 recalls I found on that database, none specifically mentioned failure of a blowout disc/plug1.

1 depended on the rubber gasket itself as the blowout valve. Several could be opened while under pressure, and some were deemed structurally deficient, which I take to mean that the vessel wasn't (consistently) built to withstand the design pressure (and a margin of safety).

[1] 1 did reach 290kpa (42psi), nearly triple the typical pressure cooker. Not sure what happened on that one.




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