Yes, it is still a pipe thread. The pipe dope is there to fill in the gaps in the thread. It is impossible to machine the treads close enough in pipe to not need something in the threads to make a seal.
NO but you will need some type of sealent OR braze or soldering
No pipe dope is to be used on the brass seats they will seat dry.
Any pipe dope will work but Teflon tape is a lot cleaner.
If you are screwing in -- yes -- If not -- you do not use pipe dope
In order to connect a chromed steel pipe to a copper pipe, you will need a brass fitting. These two pipes will not fit into each other otherwise.
Pipe dope gets its name from its pasty consistency that resembles the texture of some types of lubricants or oils, which are often called "dope" in industrial settings. The term "dope" in this context indicates a substance that is used to enhance the performance or sealability of threaded pipe connections.
pipe dope and teflon tape
To use pipe dope effectively for sealing pipe joints, first clean and dry the threads of the pipe. Apply a thin, even layer of pipe dope to the male threads, ensuring full coverage. Assemble the joint by screwing the pieces together tightly. Wipe off any excess pipe dope. Allow the joint to cure according to the manufacturer's instructions before pressurizing the system.
The best type of pipe dope recommended by plumbers for sealing pipe joints effectively is a high-quality thread sealant compound.
Brass and steel are compatible, Otherwise we could NOT use brass valves with steel piping.
If you do connect copper pipe to galvanized pipe, you will need a dielectric coupling or else the galvanized pipe will corrode. Same with connecting galvanized pipe to brass fittings. Brass is an alloy that contains copper and therefore the same electrolytic properties will exist unless a dielectric coupling is used. Hope that helps you out.
Both Teflon tape and pipe dope are effective methods for sealing pipe joints. Teflon tape is easier to use and less messy, while pipe dope provides a more secure seal. The best method depends on the specific application and personal preference.