How Can I move an old galvanized pipe
It's most probably a drain vent pipe.  Go look at the roof directly above where this pipe is.  If you see something like the picture then it is a vent pipe.  If so you can reroute this vent with a section of PVC.  Here is a link on how to connect PVC to galvanized:  PVC to galvanized  The detours should be angled up at least 45°.  If you do cut out a section of this pipe make sure that you support the upper section adequately, with braces to the studs, so that it does not drop down due to its own weight.