A weld on a 2018 power plant job made me rethink our whole pre-heat process

We were on a big outage in Georgia, working on a superheater header. The spec called for a 250 degree pre-heat, which we did. But the first pass on a thick section still cracked. The old foreman on site pulled out his temp stick and showed me the base metal was only at 180 in the center of the bevel. We had to grind it out and start over, adding a full hour of soak time. Now I argue we should always verify internal temp, not just surface. But some guys say it slows the job down too much for a maybe. Has anyone else had a weld fail from a bad pre-heat reading?

0 comments

0 Comments

No comments yet

Be the first to share your thoughts on this discussion.