Now a question for you. I have been asked to fabricate an SS exhaust piping system for an engine test cell.
Fabrication is straight forward using commercial weld fittings and straight lengths of pipe.
Specifications have not been set yet but pipe wall could be up to .0625. Also any suggestions on the thick to thin transitions when going from a tube to a flange or putting in a tank fitting would be helpful. This welding will be done out in the field where the electric power source is unknown. I forgot to mention in my most recent reply that it seems the most readily available now, at least according to my Ryerson Co. stock list, is 304 welded or seamless tube. And the commercial tube elbows and other fittings are also type 304.