Also, is there a good way to look at a piece of metal that isn't marked and determine if it is weldable, or if it is stainless versus mild steel. I feel stupid asking that question, especially because I do piping design in my job, but for me I always use sanitary stainless so I don't get to see the other variations.
Thanks for any advice you can give. Seems like there is a lot of knowledge out there.
Alicia
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