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Just found out a 1/16 inch gap in a tube sheet can cost 30k in downtime
I was reading through some old boiler inspection reports last night from a job we did in Toledo back in 2019. Turns out a tube sheet that had a gap smaller than my pinky nail caused a full shutdown for 3 days. The report said that little gap let flue gas bypass and overheated the tubes until they started failing. The plant lost about 30 grand in production time over something that probably took an extra 10 minutes to fix during the build. I'd always figured tube sheet fitment was important but I didn't think it was that critical. Has anyone else seen a small detail like that balloon into a huge problem on a job?
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the_taylor22h ago
Jumped into the details of that same report later and man, it changed how I look at tube sheets. I used to think the tolerances were just CYA stuff from the engineers, but seeing the actual temp readings and how the heat shifted into those tubes was eye opening. @miles_roberts22 I get why you'd be skeptical though, I figured the same thing until I dug through the photos showing where the gap let the gas flow wrong. That 30k number stuck with me because it was all from one tiny spot.
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