Quote:
Originally Posted by SCOTI
I'm glad you (someone that qualifies someone elses pressure welds) chimed in on this.
We have 3 boilers @ the manufacturing plant where I work. I BS'd w/a couple of the welders & inquired about the welding I was going to do on my frame (since I'm not certified). They told me about the same thing as far as my localized welding on the thinner material of the frame. They even mentioned the idea of the dye checks after several hundred miles of use just to ease my concerns. Thanks for sharing.
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No problem. There is a difference between structural weld requirements and pressure vessels, but the metalurgy is about the same. Most boiler inspectors are trained to know what to look for on welds to meet codes, I'm one of the few that was actually certified as a welder also. I even did some nuclear grade welding when I was in the navy, which is where I got some experience with more exotic alloys.
Heres a tip for anyone welding thicker metals, pre-heat the weld area to about 300 F before welding and it will significantly reduce weld stresses.