My question is this, does anyone know of a reason *not* to use
carbon steel pipe for a flask.
I'm pretty sure that the dozens of flasks I use for casting are
carbon steel, not stainless, as they all rust to some extent.
I just knock off any loose rust and spalling flakes with a wire
brush before I use them. Haven't had any problems with them yet, and
some of them are over 20 years old.
Feathered Gems Jewelry