Welding stainless steel to galvanized pipe ?

If you plan to weld galvanized metal, wait until you finish welding yourself a coffin. Galv metal is highly toxic when welded and you will die from the fumes. But you wont be the first, hundreds of thousands of men lie 6 feet under because of this. Breathe these fumes for about 30 seconds and say goodbye. Except you wont have time to say that word. You'll just drop dead.

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I guess I am dead then. Multiple times over. I have breathed the fumes, I have gotten sick. Now I drink milk before welding or burning it and I don't have any problems.

We used to call it Fume Fever. It is actually called Metal Fume Fever and it is rarely fatal.

The fumes from welding galvanized are toxic, but not that toxic.

At a minimum, do it outdoors with the wind or better a fan blowing on your back to blow the fumes away from you.