I also had to add onto the existing natural gas supply line in my home to make this work.
How to install a gas line floor flange.
Threaded pipe flange is supplied with a tapered internal thread that the pipe screws into.
The gas valve is installed to the treads of the compression nut after it the nut is installed into the flange.
Threaded flange find applications in areas in which hot work welding burning and grinding is undesirable.
The the other day i was at a friend s house with an outdoor grill and saw a floor flange.
It can come loose inside the pipe and can clog the line.
Then use the adapter included with your hookup kit to connect the flexible gas line.
Its not like a coupler for instance where a pipe can screw into both sides.
The yellow pipe you attached to the flange can then be attached to a black pipe fifing with the proper fittings.
If using a pipe thread sealant tape wrap it around the threads and insert into the fitting.
On the stove end use another flare to pipe thread fitting.
Flare joints rely on a tight fit to seal and don t require additional sealant.
In my limited experience i ve only seen these flanges used for non plumbing purposes by guys who build shelves furniture with black pipe.
Again you are correct that a gas valve is needed near the dryer.
It s been quite an ambitious learning experience for me but it s also been a rewarding one as well.
In a typical gas line installation teflon tape or pipe joint compound should always be used on the threads to insure there are no leaks.
Extend your existing gas line by fitting the valves and pipe lengths you need to add a gas line that will reach your new appliance.
Never use tape including teflon tape.
Remember to apply pipe thread compound or gas rated teflon tape to the threads on threaded connections before assembling them.
You do not need a floor flange and a floor flange is not made to couple two pipes.
Coat the threads of the pipe ends using pipe dope.