First understand, its just an exhaust pipe. all that weld is doing is holding pipe bends together. The spacing is nice is some places, but welding inspectors don't look at the nice parts.....LOL,
They look at the starts and stops, tie-ins, undercut. etc. and on stainless you want the "rainbow" to be uniform along the edge of your cover pass. Took much heat (large blue area) and you burn the nickel out, too little (no color) and you have the chance of inclusion in your weld. These are fusion welds, which are butted together and one pass. It does look like there was material added to the pass. Where as, in breweries and food process, no added material is allowed. Stainless welding is a completely different beast, and then when you factor in the different grades of stainless, the procedure varies
I spent a total of 6 1/2 yrs at 3 Budweiser breweries, and Jim Dunkin, Budweisers head welding inspector would have alot to say about those. He traveled the country to all the large expansion jobs BUT we aren't talking about process piping.here
They are excellent for an exhaust pipe, and one I would proudly put on my scoot.
I will say, the welder should have turned the purge up a little to turn that concave to a convex pass
