Thanks for all the tips guys. . .I wouldn't have guessed about the autogenous welds. . .what about using consumable butt weld inserts, like a consumable backing ring to make sure you've got a solid root pass???

Could anyone provide any general info on sanitary/food grade welding? I'm not exactly sure what I'm looking for. . .I will take anything from tips to requirements. I am looking at TIG welding 304SS in a brewery application (anything from external repairs to new brewery piping and equipment). . .I co...