I've seen some structural and pipeline pics I thought I would add some stainless steel sheet metal pics. we build all our assemblies out of stainless steel, I've just included some interior shots of a liner. Sorry for the lack of detail, company policy.
Most units have to be air tight which means a lot of TIG fusing, everything is light guage 14-20. Those little tubes are a pain to weld up, 3/4" dia outside corner overhead. The blower houses are formed from sheet are a pain to keep in tolerance.
the working conditions for this unit is probably around 800deg F. hotter ones go up to 1300 deg
everything in there is built formed and welded in house, occasionally we do inconnel, monnel and other super alloy structures and liners... glad I'm not paying the bill
P.S: Don't get too jealous of my fancy shoes