Well... I got my u know what handed to me today... A guy called me about welding a vent hood and ductwork in a restaurant Wednesday night. It was in Memphis where I lived until this time last year. I told him that I moved two hours away and no longer worked in Memphis. He went on to say that he could not get in touch with his normal guy, and he had to get the job done. The city inspector is coming by Friday afternoon. I told him for X amount of cash for gas and X amount per hour; he then quoted a number and that sounded good to me. I asked him to send me some pics before I left. He said stainless steel vent hood so I loaded up my tig welder and left for the 2 hour drive to Memphis. I never got any pics...
Here is where things get a little rough... The vent hood is stainless steel, but the ductwork is 16 gauge sheet metal, mild steel. He wanted the stainless steel vent hood welded to the mild steel ductwork, and the ductwork is welded to a piece of galvanised sheet metal connected to the roof vent.
I asked the guy why the different types of metal, because I assumed everything would be stainless steel. The guy replied that it is built to code, and he does them all the time. He also said the guy that normally does it uses a mig welder with flux core wire.
I left my mig welder at home.....
Needless to say I was on top of the vent hood attempting to tig weld stainless to mild steel with 308L tig rod... It did not go well... I picked up some 1/16 7018 rods and it worked a lot better. the vent hood and duct work had 1 inch gaps on two sides, so you can imagine how well it looked.
I learned a lesson today... If you own it then bring it to the job site with you!
My question is how are you suppose to weld something like this and it be right?