Tee-ing into gas (black) pipe
For our laundry room move we need to run new gas (black) pipe. We're going to hook into the 3/4 run that currently goes to the hot water heater and then onto the old dryer location. Where we want to hook in is a run of about 5' w/out any union, and is the middle of the run. Am I correct that there's no way I can unscrew that pipe, since unscrewing one end will screw in the other end? In that case, I assume I simple cut that run of pipe and then unscrew each end (after bleeding the system of gas, obviously.) I'd then just put in new pipe w/the tee where I need it and use a union to hook the current system back together.
Just want to make sure I'm not missing something stupid.