Working the pipe for heat! Lol (5th st ne)

Hi, im working on welding together a rocket stove for which I am looking for the main peice still which is a 2"-3" wide steel pipe. The thicker the better. If you know schedule 40 or 50 that would be absolutely perfect on every level. However as thin as stove pipe would still be much better than I got now! Hahaha.