With the release of the CSB accident report involving the catastrophic failure of an ASME pressure vessel and me posting it this afternoon, I am already getting e-mails (5 and counting within the first two hours) claiming the incident is "1 in a million" and that I am scaring people for no sound reason.  Really?  How often do we think accidents involving a pressure vessel occurs? Do we actually think they are truly 1 in a million or at some other frequency?  Well, here is the actual data over a 10 year period (1992-2001) from the National Board of Boiler and Pressure Vessel Inspectors...

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#2 Bryan 2013-11-15 23:37
I asked the same question of the NB. They would not even tell me the last Vessel # they issued. There are really no way of knowing, as there is no requirement to deregister a vessel when it is removed from service or converted to a vessel operating at less than 15 psig. All they would confirm is the numbers in their Bulletin(s) that I have referenced.
+1 #1 J Forrester 2013-11-15 20:47
Ok, so how many pressure vessels are out there?

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