The conventional steps to cut stainless pipe straight and burr-free.

To achieve a burr-free and straight cut, conventionally, the following steps have been taken to cut stainless pipe
1. Cut the tubing
2. De-burr the pipe using a bench grinder stone wheel
3. Clean the edges of the tube with wire wheel on bench grinder
4. Using a sander, sand the tube so its flat
5. Clean again using a wire wheel
6. Then TIG it connecting to the other pipe

Sometimes some of those steps need to be done twice or more just to make sure its flat and burr free. It is very time consuming to do this.