Changed my mind about pre-heating after a job in Cincinnati

Always thought letting a boiler cool completely before a weld was fine. Saw a massive stress crack form right in front of me on a cold start at the Miller plant. Anyone else run into this?

2 comments

2 Comments

robertb3014d ago

Yeah, that'll do it lol. Seen it happen with thick sections, the temp difference just rips it. Code might say it's okay but code is the bare minimum, you know? Always hit it with some heat now, not worth the call back.

avery58213d ago

Heard about a buddy who skipped pre-heat on a big pressure vessel repair. The thing split like a cheap seam the first time they fired it up, exactly like robertb30 said about the temp difference. He learned the hard way that code is just a suggestion for staying out of real trouble.