what kind of welding is this?

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I am taking a beginning welding class and have only had a few hours hands-on with stick.  Is it possible to say what kind of welding produced the welds in the picture?  Are some welds specifically designed for food/beverage industry? This is a stainless steel boiler that would have to be potable-water-standards-compliant (NSF61).Thanks Attached Images
Reply:Looks like slow pulsed tig to me, either auto or manual. The grain striation and scalloping suggests autogenous technique.Weld like a "WELDOR", not a wel-"DERR" MillerDynasty700DX,Dynasty350DX4ea,Dynasty200DX,Li  ncolnSW200-2ea.,MillerMatic350P,MillerMatic200w/spoolgun,MKCobraMig260,Lincoln SP-170T,PlasmaCam/Hypertherm1250,HFProTig2ea,MigMax1ea.
Reply:I agree - pulsed TIG, probably an automatic machine. If it were an orbital weld like with an ARC Machine, there would be no halo around the weld since the weld head would keep a purge in that area.Thanks,HoboLincoln SA200's... at least 15 - 20. They come and go. Growing partial to the "Short Hoods" in my old age. Last count on Short Hoods was 13 in possession.
Reply:Thanks for the replies.
Reply:Either a precision machine...................or Zapster!"Where's Stick man????????" - 7A749"SHHHHHH!! I sent him over to snag that MIC-4 while tbone wasn't looking!" - duaneb55"I have bought a few of Tbone's things unlike Stick-Man who helps himself" - TozziWelding"Stick-man"
Reply:Originally Posted by Stick-manEither a precision machine...................or Zapster!