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Watched a guy hydro my own firebox and I've been doing it wrong for 11 years
I was up in Fort McMurray doing a shutdown on a 3000 kW package boiler and this older hand from the contractor crew asked to borrow my wand for a second. He turned the pressure down to about 1500 psi and moved the tip in these slow circles, letting the water do the work instead of blasting scale into the tube sheet. I had always cranked it up and went at it fast, and I had to admit his way left the metal way cleaner with half the water. Now I run lower pressure and take an extra hour every time, and my re-torque numbers have been spot on since. Anyone else pick something up from a stranger on a job site that stuck with you?
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holly_williams8h ago
Does dropping from full pressure down to 1500 really make that big a difference on a firebox though? I've seen guys swear by both ways and honestly most of the scale I run into comes off fine either way as long as you keep the tip moving. The re-torque numbers being spot on for a whole year could just mean your gaskets and hardware are in good shape, not that the wand pressure changed anything. An extra hour every single job adds up fast, so I'd want to see it hold up on a few more shutdowns before I called it a rule.
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