pipe rench
No
6"
The take off formula of a 45 degree elbow pipe, will depend on what the pipe is on. Sometimes a 45 degree pipe will need a 90 degree right angle turn to come off.
The take-off for a standard radius 90 is one and one half the diameter of the pipe. Example: 6 inch 90 has a take- off of 9 inches. The take-off for short radius 90 would be the dia. of the pipe. Long radius 90 is 2 times the pipe diameter.
6"
depends on how you cut it and the size of the pipe, but with a machine blade, it shouldn't take more than couple minutes
It depends how long the pipe is, but maybe you could use something like a metal rod to pull or shove the tree branch out of the pipe?
this app help you: "Miter Flat Pattern Design" in play.google.com
What schedule are you asking about?
Three inches
Just curious