Until it's hot. It doesn't take very long generally. Clean pipe, no moisture in it, no breeze and a flame 3/4 to and inch long, 10 to 20 seconds should be enough. If there is moisture in the pipe, it will dissipate the heat and if it has water in it, you can't get it hot enough with propane.
It is probably referring to the type of fitting. A fitting that is soldered to a copper pipe. It is called sweating when you use solder and a torch to connect copper pipe together or attach fittings to copper pipe.
Either cut it out on the pipe with copper cutters or sweat it out with a plumbing torch.
Wet on the surface is no problem, it will evaporate with the torch. If there is water in the pipe, it will not solder because the water keeps the copper from getting hot enough. As long as the water is below the point of solder, it will work. Open the nearest valve or have some way for the steam to get out of the pipe.
2000 Psi
Assuming the 6" refers to the radius of the pipe, it will hold approx 294 US gallons.
A hatchet copper? The only thing that comes to mind is a clip that is used to hold copper pipe up. It is driven into wood and has a curved section to support the pipe. A copper hatchet or brass hammer is used when you do not want to damage what you are hammering.
It depends on how much each pipe can hold. And how long each pipe is.
1/2inch
About sixteen feet
A copper pipe is a conductor :) x
It depends how long it is.
Depends how long it is