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Just found out the original boilers on the SS Badger were rated for 450 psi back in the 50s

I was reading an old maintenance log from the Lake Michigan car ferry and saw the pressure rating. That's a lot of steam for a ship that's still running today. Makes you think about the quality of the steel and the welds they were doing back then. Anyone here ever worked on a vessel with that kind of original, old-school pressure spec?
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wendy_murphy16
Actually worked on a few old Great Lakes bulk carriers with similar specs. That 450 psi is impressive, but they almost never ran at full rating in daily service. The real test is how they've been cared for all these years. Doesn't that maintenance log show more about the crew than the original steel?
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thompson.finley
You're right that the maintenance log tells a story, wendy_murphy16. If they almost never ran at 450 psi, what was the usual operating pressure they logged? I'm curious if the log shows them slowly dialing it back over the decades as things aged, or if they kept it steady. That would really show the crew's long term thinking.
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