Food grade SS project

For those who are interested I think I found what I need at

I would say , don't weld it. Just use a high temp silver solder, and appropriate flux.

I'll second Ernie's comment, but I'd recommend you do some research into nontoxic brazing filler metals. One source is the Brazing Book Online.

Is this for sanitary reasons post-fabication or ease of fabrication?

Peter

Thanks. The Brazing Book is a neat site.

Peter

I'd say that you'd want a crevice free interior for sanitary reasons. The brazing filler metal should flow pretty well and the flux residue will be soluble in water so it will be easy to remove. GTA welding with an interior purge should be OK too, but you might need to dress the welds by grinding to make sure you have no crevices. Not such a big deal if all you ever use it for is water. But who knows what'll happen way down the road. I think your bigger problem will be keeping the joint closed tight while you're joining it. Thin gages tend to spread as you weld along. You'll need lots of tacking if you're welding. The brazing might be better done in a furnace with a preplaced filler metal insert and weights to hold the joint shut.

You should be fine with a standard austenitic stainless steel, 304, 304L,

John