Very carfully
the same way you remove a non rusty wheel.....
Cut the pipe and remove it, fix pipe with a coupling.
Extractor.
With a extractor
threaded pipe use an extractor
how to remove timing cover with heater pipe attached 92 olds 88 3.8l
try 2 pipe wrenches or cut the pipe and remove remaining with a nipple extractor avail about any plumbing supply or home center
The name for a pipe in the ground used to remove water from an aquifer is called a well.
It can't be done without cutting the pipe
To effectively remove a PVC pipe from a fitting, you can use a heat gun to soften the PVC material and then twist and pull the pipe out of the fitting. Alternatively, you can use a PVC pipe cutter to cut the pipe close to the fitting and then remove the remaining piece with pliers or a wrench. Be sure to wear protective gear and work carefully to avoid damaging the fitting or the pipe.
Insulating it
inside the exhaust pipe. remove pipe to find washer(aka governor) in head pipe.