Believe it or not, hydraulic (hydro) water testing is in itself, proven to weaken the vessel structure.
Over-pressurization will surely weed out the bad units, but can also have a cumulative (bad) effect of stressing the metal. -Don -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Brooke Clarke Sent: Monday, November 25, 2013 12:49 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Man killed in quartz crystal accident Hi: Just North of me there's a museum that has working live steam boilers and many engines. Every year they pressure test everything carrying steam prior to the annual steam up. The test is simply to fill the boiler (or other equipment) with water in such a way that there is no trapped air and then pressurize the system to say 2X or 3X the operating pressure. If there's a weak spot as soon as it starts to move the pressure drops very quickly since water does not compress and so there's minimal danger. I don't see why they could not do room temperature pressure test using water prior to every run? Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.