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Had a flange weld crack on a boiler in a Detroit plant last winter
We were doing a pressure test on a 300 psi steam boiler after a full rebuild. I heard a sharp hiss and saw a hairline crack open up along a 4-inch flange weld I'd just finished. The whole crew had to shut down, bleed the system, and let it cool. We ground out the bad section, preheated the area with a rosebud, and re-welded it with 7018 rods. Anyone have a better method for preventing stress cracks on thick flanges?
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blair_butler471d ago
Try peening the weld bead right after you finish. Helps relieve some of that stress. Also, a slower cool down with insulation can make a big difference.
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