well for starters pipe is roughly measured as an ID where as tube is OD

So your 1" pipe will really have an OD of +/- 1.315" and depending on schedule (10,40,80 ect.) the ID will be 1.10", 1.15", 1.96"...
And your 1" x .095wall mild steel tubing will have an actual OD of 1"
So you need to decide if your going to use pipe or tubing and buy a die accordingly.